技术联盟

Android RESideMenu侧滑菜单

参考GitHub 中

RESideMenu

https://github.com/romaonthego/RESideMenu

https://github.com/kyze8439690/ResideLayout

https://github.com/SpecialCyCi/AndroidResideMenu

Android仿QQ5.0侧滑菜单ResideMenu

最近项目要做一个QQ5.0的侧滑菜单效果,和传统的侧滑菜单存在着一些差异。想必大家都已经见识过了。

为了不重复发明轮子,先去github上面搜索了一番。

发现了几个类似的,但是还是有一些不同。

下面是搜索到的类似的开源项目。

RESideMenu(ios项目)

https://github.com/romaonthego/RESideMenu

AndroidResideMenu

https://github.com/SpecialCyCi/AndroidResideMenu

ResideLayout

https://github.com/kyze8439690/ResideLayout

 

研究了一下这些开源项目的源代码。感觉并不是特别适用于我们自己的项目。所以,我自己又研究了一下。最后的效果如下。当然了,还有很多可以优化的地方,后续再慢慢优化。

我是基于SlidingMenu库进行的二次修改,增加了一些转场动画。

大家对这个库应该比较熟悉,下面是SlidingMenu的github地址。非常感谢Jeremy Feinstein提供的这个库,让广大Android Developers省去了非常多的麻烦。

https://github.com/jfeinstein10/SlidingMenu

备注:SlidingMenu使用了SherlockActionBar这个库,配置起来会比较麻烦,在文章的最后我会把demo上传,供大家下载,减去了大家自己配置项目的麻烦。

我主要修改了2个类,SlidingMenu.java和CustonViewAbove.java,只是增加了一些功能,并没有修改原本的功能。

做了修改的地方,我做了中文注释,其实实现很简单,几行代码而已。推荐大家下载Demo,然后自己调试一下。Demo的下载地址在文章的末尾。

废话不多说,直接上代码,略微有点长。

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public class SlidingMenu extends RelativeLayout {
    private static final String TAG = SlidingMenu.class.getSimpleName();
    public static final int SLIDING_WINDOW = 0;
    public static final int SLIDING_CONTENT = 1;
    private boolean mActionbarOverlay = false;
    /**
     * Constant value for use with setTouchModeAbove(). Allows the SlidingMenu
     * to be opened with a swipe gesture on the screen's margin
     */
    public static final int TOUCHMODE_MARGIN = 0;
    /**
     * Constant value for use with setTouchModeAbove(). Allows the SlidingMenu
     * to be opened with a swipe gesture anywhere on the screen
     */
    public static final int TOUCHMODE_FULLSCREEN = 1;
    /**
     * Constant value for use with setTouchModeAbove(). Denies the SlidingMenu
     * to be opened with a swipe gesture
     */
    public static final int TOUCHMODE_NONE = 2;
    /**
     * Constant value for use with setMode(). Puts the menu to the left of the
     * content.
     */
    public static final int LEFT = 0;
    /**
     * Constant value for use with setMode(). Puts the menu to the right of the
     * content.
     */
    public static final int RIGHT = 1;
    /**
     * Constant value for use with setMode(). Puts menus to the left and right
     * of the content.
     */
    public static final int LEFT_RIGHT = 2;
    private CustomViewAbove mViewAbove;
    private CustomViewBehind mViewBehind;
        /** 整体的背景,用一个ImageView代替 */
    private ImageView mViewBackground;
    private OnOpenListener mOpenListener;
    private OnOpenListener mSecondaryOpenListner;
    private OnCloseListener mCloseListener;
    /**
     * The listener interface for receiving onOpen events. The class that is
     * interested in processing a onOpen event implements this interface, and
     * the object created with that class is registered with a component using
     * the component's <code>addOnOpenListener<code> method. When
     * the onOpen event occurs, that object's appropriate
     * method is invoked
     */
    public interface OnOpenListener {
        /**
         * On open.
         */
        public void onOpen();
    }
    /**
     * The listener interface for receiving onOpened events. The class that is
     * interested in processing a onOpened event implements this interface, and
     * the object created with that class is registered with a component using
     * the component's <code>addOnOpenedListener<code> method. When
     * the onOpened event occurs, that object's appropriate
     * method is invoked.
     *
     * @see OnOpenedEvent
     */
    public interface OnOpenedListener {
        /**
         * On opened.
         */
        public void onOpened();
    }
    /**
     * The listener interface for receiving onClose events. The class that is
     * interested in processing a onClose event implements this interface, and
     * the object created with that class is registered with a component using
     * the component's <code>addOnCloseListener<code> method. When
     * the onClose event occurs, that object's appropriate
     * method is invoked.
     *
     * @see OnCloseEvent
     */
    public interface OnCloseListener {
        /**
         * On close.
         */
        public void onClose();
    }
    /**
     * The listener interface for receiving onClosed events. The class that is
     * interested in processing a onClosed event implements this interface, and
     * the object created with that class is registered with a component using
     * the component's <code>addOnClosedListener<code> method. When
     * the onClosed event occurs, that object's appropriate
     * method is invoked.
     *
     * @see OnClosedEvent
     */
    public interface OnClosedListener {
        /**
         * On closed.
         */
        public void onClosed();
    }
    /**
     * The Interface CanvasTransformer.
     */
    public interface CanvasTransformer {
        /**
         * Transform canvas.
         *
         * @param canvas
         *            the canvas
         * @param percentOpen
         *            the percent open
         */
        public void transformCanvas(Canvas canvas, float percentOpen);
    }
    /**
     * Instantiates a new SlidingMenu.
     *
     * @param context
     *            the associated Context
     */
    public SlidingMenu(Context context) {
        this(context, null);
    }
    /**
     * Instantiates a new SlidingMenu and attach to Activity.
     *
     * @param activity
     *            the activity to attach slidingmenu
     * @param slideStyle
     *            the slidingmenu style
     */
    public SlidingMenu(Activity activity, int slideStyle) {
        this(activity, null);
        this.attachToActivity(activity, slideStyle);
    }
    /**
     * Instantiates a new SlidingMenu.
     *
     * @param context
     *            the associated Context
     * @param attrs
     *            the attrs
     */
    public SlidingMenu(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }
    /**
     * Instantiates a new SlidingMenu.
     *
     * @param context
     *            the associated Context
     * @param attrs
     *            the attrs
     * @param defStyle
     *            the def style
     */
    public SlidingMenu(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
                /** SlidingMenu是一个RelativeLayout,这里把背景图ImageView添加到RelativeLayout的最底层。*/
        LayoutParams backgroundParams = new LayoutParams(
                LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
        mViewBackground = new ImageView(context);
        mViewBackground.setScaleType(ImageView.ScaleType.CENTER_CROP);
        addView(mViewBackground, backgroundParams);
                LayoutParams behindParams = new LayoutParams(LayoutParams.MATCH_PARENT,
                LayoutParams.MATCH_PARENT);
        mViewBehind = new CustomViewBehind(context);
        addView(mViewBehind, behindParams);
        LayoutParams aboveParams = new LayoutParams(LayoutParams.MATCH_PARENT,
                LayoutParams.MATCH_PARENT);
        mViewAbove = new CustomViewAbove(context);
        addView(mViewAbove, aboveParams);
        // register the CustomViewBehind with the CustomViewAbove
        mViewAbove.setCustomViewBehind(mViewBehind);
        mViewBehind.setCustomViewAbove(mViewAbove);
        mViewAbove.setOnPageChangeListener(new OnPageChangeListener() {
            public static final int POSITION_OPEN = 0;
            public static final int POSITION_CLOSE = 1;
            public static final int POSITION_SECONDARY_OPEN = 2;
            public void onPageScrolled(int position, float positionOffset,
                    int positionOffsetPixels) {
            }
            public void onPageSelected(int position) {
                if (position == POSITION_OPEN && mOpenListener != null) {
                    mOpenListener.onOpen();
                } else if (position == POSITION_CLOSE && mCloseListener != null) {
                    mCloseListener.onClose();
                } else if (position == POSITION_SECONDARY_OPEN
                        && mSecondaryOpenListner != null) {
                    mSecondaryOpenListner.onOpen();
                }
            }
        });
        // now style everything!
        TypedArray ta = context.obtainStyledAttributes(attrs,
                R.styleable.SlidingMenu);
        // set the above and behind views if defined in xml
        int mode = ta.getInt(R.styleable.SlidingMenu_mode, LEFT);
        setMode(mode);
        int viewAbove = ta.getResourceId(R.styleable.SlidingMenu_viewAbove, -1);
        if (viewAbove != -1) {
            setContent(viewAbove);
        } else {
            setContent(new FrameLayout(context));
        }
        int viewBehind = ta.getResourceId(R.styleable.SlidingMenu_viewBehind,
                -1);
        if (viewBehind != -1) {
            setMenu(viewBehind);
        } else {
            setMenu(new FrameLayout(context));
        }
        int touchModeAbove = ta.getInt(R.styleable.SlidingMenu_touchModeAbove,
                TOUCHMODE_MARGIN);
        setTouchModeAbove(touchModeAbove);
        int touchModeBehind = ta.getInt(
                R.styleable.SlidingMenu_touchModeBehind, TOUCHMODE_MARGIN);
        setTouchModeBehind(touchModeBehind);
        int offsetBehind = (int) ta.getDimension(
                R.styleable.SlidingMenu_behindOffset, -1);
        int widthBehind = (int) ta.getDimension(
                R.styleable.SlidingMenu_behindWidth, -1);
        if (offsetBehind != -1 && widthBehind != -1)
            throw new IllegalStateException(
                    "Cannot set both behindOffset and behindWidth for a SlidingMenu");
        else if (offsetBehind != -1)
            setBehindOffset(offsetBehind);
        else if (widthBehind != -1)
            setBehindWidth(widthBehind);
        else
            setBehindOffset(0);
        float scrollOffsetBehind = ta.getFloat(
                R.styleable.SlidingMenu_behindScrollScale, 0.33f);
        setBehindScrollScale(scrollOffsetBehind);
        int shadowRes = ta.getResourceId(
                R.styleable.SlidingMenu_shadowDrawable, -1);
        if (shadowRes != -1) {
            setShadowDrawable(shadowRes);
        }
        int shadowWidth = (int) ta.getDimension(
                R.styleable.SlidingMenu_shadowWidth, 0);
        setShadowWidth(shadowWidth);
        boolean fadeEnabled = ta.getBoolean(
                R.styleable.SlidingMenu_fadeEnabled, true);
        setFadeEnabled(fadeEnabled);
        float fadeDeg = ta.getFloat(R.styleable.SlidingMenu_fadeDegree, 0.33f);
        setFadeDegree(fadeDeg);
        boolean selectorEnabled = ta.getBoolean(
                R.styleable.SlidingMenu_selectorEnabled, false);
        setSelectorEnabled(selectorEnabled);
        int selectorRes = ta.getResourceId(
                R.styleable.SlidingMenu_selectorDrawable, -1);
        if (selectorRes != -1)
            setSelectorDrawable(selectorRes);
        ta.recycle();
    }
    /**
     * Attaches the SlidingMenu to an entire Activity
     *
     * @param activity
     *            the Activity
     * @param slideStyle
     *            either SLIDING_CONTENT or SLIDING_WINDOW
     */
    public void attachToActivity(Activity activity, int slideStyle) {
        attachToActivity(activity, slideStyle, false);
    }
    /**
     * Attaches the SlidingMenu to an entire Activity
     *
     * @param activity
     *            the Activity
     * @param slideStyle
     *            either SLIDING_CONTENT or SLIDING_WINDOW
     * @param actionbarOverlay
     *            whether or not the ActionBar is overlaid
     */
    public void attachToActivity(Activity activity, int slideStyle,
            boolean actionbarOverlay) {
        if (slideStyle != SLIDING_WINDOW && slideStyle != SLIDING_CONTENT)
            throw new IllegalArgumentException(
                    "slideStyle must be either SLIDING_WINDOW or SLIDING_CONTENT");
        if (getParent() != null)
            throw new IllegalStateException(
                    "This SlidingMenu appears to already be attached");
        // get the window background
        TypedArray a = activity.getTheme().obtainStyledAttributes(
                new int[] { android.R.attr.windowBackground });
        int background = a.getResourceId(0, 0);
        a.recycle();
        switch (slideStyle) {
        case SLIDING_WINDOW:
            mActionbarOverlay = false;
            ViewGroup decor = (ViewGroup) activity.getWindow().getDecorView();
            ViewGroup decorChild = (ViewGroup) decor.getChildAt(0);
            // save ActionBar themes that have transparent assets
            decorChild.setBackgroundResource(background);
            decor.removeView(decorChild);
            decor.addView(this);
            setContent(decorChild);
            break;
        case SLIDING_CONTENT:
            mActionbarOverlay = actionbarOverlay;
            // take the above view out of
            ViewGroup contentParent = (ViewGroup) activity
                    .findViewById(android.R.id.content);
            View content = contentParent.getChildAt(0);
            contentParent.removeView(content);
            contentParent.addView(this);
            setContent(content);
            // save people from having transparent backgrounds
            if (content.getBackground() == null)
                content.setBackgroundResource(background);
            break;
        }
    }
    /**
     * Set the above view content from a layout resource. The resource will be
     * inflated, adding all top-level views to the above view.
     *
     * @param res
     *            the new content
     */
    public void setContent(int res) {
        setContent(LayoutInflater.from(getContext()).inflate(res, null));
    }
    /**
     * Set the above view content to the given View.
     *
     * @param view
     *            The desired content to display.
     */
    public void setContent(View view) {
        mViewAbove.setContent(view);
        showContent();
    }
    /**
     * 设置背景图片
     *
     * @param resid
     */
    public void setBackgroundImage(int resid) {
        mViewBackground.setBackgroundResource(resid);
    }
    /**
     * Retrieves the current content.
     *
     * @return the current content
     */
    public View getContent() {
        return mViewAbove.getContent();
    }
    /**
     * Set the behind view (menu) content from a layout resource. The resource
     * will be inflated, adding all top-level views to the behind view.
     *
     * @param res
     *            the new content
     */
    public void setMenu(int res) {
        setMenu(LayoutInflater.from(getContext()).inflate(res, null));
    }
    /**
     * Set the behind view (menu) content to the given View.
     *
     * @param view
     *            The desired content to display.
     */
    public void setMenu(View v) {
        mViewBehind.setContent(v);
    }
    /**
     * Retrieves the main menu.
     *
     * @return the main menu
     */
    public View getMenu() {
        return mViewBehind.getContent();
    }
    /**
     * Set the secondary behind view (right menu) content from a layout
     * resource. The resource will be inflated, adding all top-level views to
     * the behind view.
     *
     * @param res
     *            the new content
     */
    public void setSecondaryMenu(int res) {
        setSecondaryMenu(LayoutInflater.from(getContext()).inflate(res, null));
    }
    /**
     * Set the secondary behind view (right menu) content to the given View.
     *
     * @param view
     *            The desired content to display.
     */
    public void setSecondaryMenu(View v) {
        mViewBehind.setSecondaryContent(v);
        // mViewBehind.invalidate();
    }
    /**
     * Retrieves the current secondary menu (right).
     *
     * @return the current menu
     */
    public View getSecondaryMenu() {
        return mViewBehind.getSecondaryContent();
    }
    /**
     * Sets the sliding enabled.
     *
     * @param b
     *            true to enable sliding, false to disable it.
     */
    public void setSlidingEnabled(boolean b) {
        mViewAbove.setSlidingEnabled(b);
    }
    /**
     * Checks if is sliding enabled.
     *
     * @return true, if is sliding enabled
     */
    public boolean isSlidingEnabled() {
        return mViewAbove.isSlidingEnabled();
    }
    /**
     * Sets which side the SlidingMenu should appear on.
     *
     * @param mode
     *            must be either SlidingMenu.LEFT or SlidingMenu.RIGHT
     */
    public void setMode(int mode) {
        if (mode != LEFT && mode != RIGHT && mode != LEFT_RIGHT) {
            throw new IllegalStateException(
                    "SlidingMenu mode must be LEFT, RIGHT, or LEFT_RIGHT");
        }
        mViewBehind.setMode(mode);
    }
    /**
     * Returns the current side that the SlidingMenu is on.
     *
     * @return the current mode, either SlidingMenu.LEFT or SlidingMenu.RIGHT
     */
    public int getMode() {
        return mViewBehind.getMode();
    }
    /**
     * Sets whether or not the SlidingMenu is in static mode (i.e. nothing is
     * moving and everything is showing)
     *
     * @param b
     *            true to set static mode, false to disable static mode.
     */
    public void setStatic(boolean b) {
        if (b) {
            setSlidingEnabled(false);
            mViewAbove.setCustomViewBehind(null);
            mViewAbove.setCurrentItem(1);
            // mViewBehind.setCurrentItem(0);
        } else {
            mViewAbove.setCurrentItem(1);
            // mViewBehind.setCurrentItem(1);
            mViewAbove.setCustomViewBehind(mViewBehind);
            setSlidingEnabled(true);
        }
    }
    /**
     * Opens the menu and shows the menu view.
     */
    public void showMenu() {
        showMenu(true);
    }
    /**
     * Opens the menu and shows the menu view.
     *
     * @param animate
     *            true to animate the transition, false to ignore animation
     */
    public void showMenu(boolean animate) {
        mViewAbove.setCurrentItem(0, animate);
    }
    /**
     * Opens the menu and shows the secondary menu view. Will default to the
     * regular menu if there is only one.
     */
    public void showSecondaryMenu() {
        showSecondaryMenu(true);
    }
    /**
     * Opens the menu and shows the secondary (right) menu view. Will default to
     * the regular menu if there is only one.
     *
     * @param animate
     *            true to animate the transition, false to ignore animation
     */
    public void showSecondaryMenu(boolean animate) {
        mViewAbove.setCurrentItem(2, animate);
    }
    /**
     * Closes the menu and shows the above view.
     */
    public void showContent() {
        showContent(true);
    }
    /**
     * Closes the menu and shows the above view.
     *
     * @param animate
     *            true to animate the transition, false to ignore animation
     */
    public void showContent(boolean animate) {
        mViewAbove.setCurrentItem(1, animate);
    }
    /**
     * Toggle the SlidingMenu. If it is open, it will be closed, and vice versa.
     */
    public void toggle() {
        toggle(true);
    }
    /**
     * Toggle the SlidingMenu. If it is open, it will be closed, and vice versa.
     *
     * @param animate
     *            true to animate the transition, false to ignore animation
     */
    public void toggle(boolean animate) {
        if (isMenuShowing()) {
            showContent(animate);
        } else {
            showMenu(animate);
        }
    }
    /**
     * Checks if is the behind view showing.
     *
     * @return Whether or not the behind view is showing
     */
    public boolean isMenuShowing() {
        return mViewAbove.getCurrentItem() == 0
                || mViewAbove.getCurrentItem() == 2;
    }
    /**
     * Checks if is the behind view showing.
     *
     * @return Whether or not the behind view is showing
     */
    public boolean isSecondaryMenuShowing() {
        return mViewAbove.getCurrentItem() == 2;
    }
    /**
     * Gets the behind offset.
     *
     * @return The margin on the right of the screen that the behind view
     *         scrolls to
     */
    public int getBehindOffset() {
        return ((RelativeLayout.LayoutParams) mViewBehind.getLayoutParams()).rightMargin;
    }
    /**
     * Sets the behind offset.
     *
     * @param i
     *            The margin, in pixels, on the right of the screen that the
     *            behind view scrolls to.
     */
    public void setBehindOffset(int i) {
        // RelativeLayout.LayoutParams params =
        // ((RelativeLayout.LayoutParams)mViewBehind.getLayoutParams());
        // int bottom = params.bottomMargin;
        // int top = params.topMargin;
        // int left = params.leftMargin;
        // params.setMargins(left, top, i, bottom);
        mViewBehind.setWidthOffset(i);
    }
    /**
     * Sets the behind offset.
     *
     * @param resID
     *            The dimension resource id to be set as the behind offset. The
     *            menu, when open, will leave this width margin on the right of
     *            the screen.
     */
    public void setBehindOffsetRes(int resID) {
        int i = (int) getContext().getResources().getDimension(resID);
        setBehindOffset(i);
    }
    /**
     * Sets the above offset.
     *
     * @param i
     *            the new above offset, in pixels
     */
    public void setAboveOffset(int i) {
        mViewAbove.setAboveOffset(i);
    }
    /**
     * Sets the above offset.
     *
     * @param resID
     *            The dimension resource id to be set as the above offset.
     */
    public void setAboveOffsetRes(int resID) {
        int i = (int) getContext().getResources().getDimension(resID);
        setAboveOffset(i);
    }
    /**
     * Sets the behind width.
     *
     * @param i
     *            The width the Sliding Menu will open to, in pixels
     */
    @SuppressWarnings("deprecation")
    public void setBehindWidth(int i) {
        int width;
        Display display = ((WindowManager) getContext().getSystemService(
                Context.WINDOW_SERVICE)).getDefaultDisplay();
        try {
            Class<?> cls = Display.class;
            Class<?>[] parameterTypes = { Point.class };
            Point parameter = new Point();
            Method method = cls.getMethod("getSize", parameterTypes);
            method.invoke(display, parameter);
            width = parameter.x;
        } catch (Exception e) {
            width = display.getWidth();
        }
        setBehindOffset(width - i);
    }
    /**
     * Sets the behind width.
     *
     * @param res
     *            The dimension resource id to be set as the behind width
     *            offset. The menu, when open, will open this wide.
     */
    public void setBehindWidthRes(int res) {
        int i = (int) getContext().getResources().getDimension(res);
        setBehindWidth(i);
    }
    /**
     * Gets the behind scroll scale.
     *
     * @return The scale of the parallax scroll
     */
    public float getBehindScrollScale() {
        return mViewBehind.getScrollScale();
    }
    /**
     * Gets the touch mode margin threshold
     *
     * @return the touch mode margin threshold
     */
    public int getTouchmodeMarginThreshold() {
        return mViewBehind.getMarginThreshold();
    }
    /**
     * Set the touch mode margin threshold
     *
     * @param touchmodeMarginThreshold
     */
    public void setTouchmodeMarginThreshold(int touchmodeMarginThreshold) {
        mViewBehind.setMarginThreshold(touchmodeMarginThreshold);
    }
    /**
     * Sets the behind scroll scale.
     *
     * @param f
     *            The scale of the parallax scroll (i.e. 1.0f scrolls 1 pixel
     *            for every 1 pixel that the above view scrolls and 0.0f scrolls
     *            0 pixels)
     */
    public void setBehindScrollScale(float f) {
        if (f < 0 && f > 1)
            throw new IllegalStateException(
                    "ScrollScale must be between 0 and 1");
        mViewBehind.setScrollScale(f);
    }
    /**
     * Sets the behind canvas transformer.
     *
     * @param t
     *            the new behind canvas transformer
     */
    public void setBehindCanvasTransformer(CanvasTransformer t) {
        mViewBehind.setCanvasTransformer(t);
    }
    /**
     * 设置右侧视图的转场动画
     *
     * @param t
     *            the new above canvas transformer
     */
    public void setAboveCanvasTransformer(CanvasTransformer t) {
        mViewAbove.setCanvasTransformer(t);
    }
    /**
     * Gets the touch mode above.
     *
     * @return the touch mode above
     */
    public int getTouchModeAbove() {
        return mViewAbove.getTouchMode();
    }
    /**
     * Controls whether the SlidingMenu can be opened with a swipe gesture.
     * Options are {@link #TOUCHMODE_MARGIN TOUCHMODE_MARGIN},
     * {@link #TOUCHMODE_FULLSCREEN TOUCHMODE_FULLSCREEN}, or
     * {@link #TOUCHMODE_NONE TOUCHMODE_NONE}
     *
     * @param i
     *            the new touch mode
     */
    public void setTouchModeAbove(int i) {
        if (i != TOUCHMODE_FULLSCREEN && i != TOUCHMODE_MARGIN
                && i != TOUCHMODE_NONE) {
            throw new IllegalStateException(
                    "TouchMode must be set to either"
                            + "TOUCHMODE_FULLSCREEN or TOUCHMODE_MARGIN or TOUCHMODE_NONE.");
        }
        mViewAbove.setTouchMode(i);
    }
    /**
     * Controls whether the SlidingMenu can be opened with a swipe gesture.
     * Options are {@link #TOUCHMODE_MARGIN TOUCHMODE_MARGIN},
     * {@link #TOUCHMODE_FULLSCREEN TOUCHMODE_FULLSCREEN}, or
     * {@link #TOUCHMODE_NONE TOUCHMODE_NONE}
     *
     * @param i
     *            the new touch mode
     */
    public void setTouchModeBehind(int i) {
        if (i != TOUCHMODE_FULLSCREEN && i != TOUCHMODE_MARGIN
                && i != TOUCHMODE_NONE) {
            throw new IllegalStateException(
                    "TouchMode must be set to either"
                            + "TOUCHMODE_FULLSCREEN or TOUCHMODE_MARGIN or TOUCHMODE_NONE.");
        }
        mViewBehind.setTouchMode(i);
    }
    /**
     * Sets the shadow drawable.
     *
     * @param resId
     *            the resource ID of the new shadow drawable
     */
    public void setShadowDrawable(int resId) {
        setShadowDrawable(getContext().getResources().getDrawable(resId));
    }
    /**
     * Sets the shadow drawable.
     *
     * @param d
     *            the new shadow drawable
     */
    public void setShadowDrawable(Drawable d) {
        mViewBehind.setShadowDrawable(d);
    }
    /**
     * Sets the secondary (right) shadow drawable.
     *
     * @param resId
     *            the resource ID of the new shadow drawable
     */
    public void setSecondaryShadowDrawable(int resId) {
        setSecondaryShadowDrawable(getContext().getResources().getDrawable(
                resId));
    }
    /**
     * Sets the secondary (right) shadow drawable.
     *
     * @param d
     *            the new shadow drawable
     */
    public void setSecondaryShadowDrawable(Drawable d) {
        mViewBehind.setSecondaryShadowDrawable(d);
    }
    /**
     * Sets the shadow width.
     *
     * @param resId
     *            The dimension resource id to be set as the shadow width.
     */
    public void setShadowWidthRes(int resId) {
        setShadowWidth((int) getResources().getDimension(resId));
    }
    /**
     * Sets the shadow width.
     *
     * @param pixels
     *            the new shadow width, in pixels
     */
    public void setShadowWidth(int pixels) {
        mViewBehind.setShadowWidth(pixels);
    }
    /**
     * Enables or disables the SlidingMenu's fade in and out
     *
     * @param b
     *            true to enable fade, false to disable it
     */
    public void setFadeEnabled(boolean b) {
        mViewBehind.setFadeEnabled(b);
    }
    /**
     * Sets how much the SlidingMenu fades in and out. Fade must be enabled, see
     * {@link #setFadeEnabled(boolean) setFadeEnabled(boolean)}
     *
     * @param f
     *            the new fade degree, between 0.0f and 1.0f
     */
    public void setFadeDegree(float f) {
        mViewBehind.setFadeDegree(f);
    }
    /**
     * Enables or disables whether the selector is drawn
     *
     * @param b
     *            true to draw the selector, false to not draw the selector
     */
    public void setSelectorEnabled(boolean b) {
        mViewBehind.setSelectorEnabled(true);
    }
    /**
     * Sets the selected view. The selector will be drawn here
     *
     * @param v
     *            the new selected view
     */
    public void setSelectedView(View v) {
        mViewBehind.setSelectedView(v);
    }
    /**
     * Sets the selector drawable.
     *
     * @param res
     *            a resource ID for the selector drawable
     */
    public void setSelectorDrawable(int res) {
        mViewBehind.setSelectorBitmap(BitmapFactory.decodeResource(
                getResources(), res));
    }
    /**
     * Sets the selector drawable.
     *
     * @param b
     *            the new selector bitmap
     */
    public void setSelectorBitmap(Bitmap b) {
        mViewBehind.setSelectorBitmap(b);
    }
    /**
     * Add a View ignored by the Touch Down event when mode is Fullscreen
     *
     * @param v
     *            a view to be ignored
     */
    public void addIgnoredView(View v) {
        mViewAbove.addIgnoredView(v);
    }
    /**
     * Remove a View ignored by the Touch Down event when mode is Fullscreen
     *
     * @param v
     *            a view not wanted to be ignored anymore
     */
    public void removeIgnoredView(View v) {
        mViewAbove.removeIgnoredView(v);
    }
    /**
     * Clear the list of Views ignored by the Touch Down event when mode is
     * Fullscreen
     */
    public void clearIgnoredViews() {
        mViewAbove.clearIgnoredViews();
    }
    /**
     * Sets the OnOpenListener. {@link OnOpenListener#onOpen()
     * OnOpenListener.onOpen()} will be called when the SlidingMenu is opened
     *
     * @param listener
     *            the new OnOpenListener
     */
    public void setOnOpenListener(OnOpenListener listener) {
        // mViewAbove.setOnOpenListener(listener);
        mOpenListener = listener;
    }
    /**
     * Sets the OnOpenListner for secondary menu {@link OnOpenListener#onOpen()
     * OnOpenListener.onOpen()} will be called when the secondary SlidingMenu is
     * opened
     *
     * @param listener
     *            the new OnOpenListener
     */
    public void setSecondaryOnOpenListner(OnOpenListener listener) {
        mSecondaryOpenListner = listener;
    }
    /**
     * Sets the OnCloseListener. {@link OnCloseListener#onClose()
     * OnCloseListener.onClose()} will be called when any one of the SlidingMenu
     * is closed
     *
     * @param listener
     *            the new setOnCloseListener
     */
    public void setOnCloseListener(OnCloseListener listener) {
        // mViewAbove.setOnCloseListener(listener);
        mCloseListener = listener;
    }
    /**
     * Sets the OnOpenedListener. {@link OnOpenedListener#onOpened()
     * OnOpenedListener.onOpened()} will be called after the SlidingMenu is
     * opened
     *
     * @param listener
     *            the new OnOpenedListener
     */
    public void setOnOpenedListener(OnOpenedListener listener) {
        mViewAbove.setOnOpenedListener(listener);
    }
    /**
     * Sets the OnClosedListener. {@link OnClosedListener#onClosed()
     * OnClosedListener.onClosed()} will be called after the SlidingMenu is
     * closed
     *
     * @param listener
     *            the new OnClosedListener
     */
    public void setOnClosedListener(OnClosedListener listener) {
        mViewAbove.setOnClosedListener(listener);
    }
    public static class SavedState extends BaseSavedState {
        private final int mItem;
        public SavedState(Parcelable superState, int item) {
            super(superState);
            mItem = item;
        }
        private SavedState(Parcel in) {
            super(in);
            mItem = in.readInt();
        }
        public int getItem() {
            return mItem;
        }
        /*
         * (non-Javadoc)
         *
         * @see android.view.AbsSavedState#writeToParcel(android.os.Parcel, int)
         */
        public void writeToParcel(Parcel out, int flags) {
            super.writeToParcel(out, flags);
            out.writeInt(mItem);
        }
        public static final Parcelable.Creator<SavedState> CREATOR = new Parcelable.Creator<SavedState>() {
            public SavedState createFromParcel(Parcel in) {
                return new SavedState(in);
            }
            public SavedState[] newArray(int size) {
                return new SavedState[size];
            }
        };
    }
    /*
     * (non-Javadoc)
     *
     * @see android.view.View#onSaveInstanceState()
     */
    @Override
    protected Parcelable onSaveInstanceState() {
        Parcelable superState = super.onSaveInstanceState();
        SavedState ss = new SavedState(superState, mViewAbove.getCurrentItem());
        return ss;
    }
    /*
     * (non-Javadoc)
     *
     * @see android.view.View#onRestoreInstanceState(android.os.Parcelable)
     */
    @Override
    protected void onRestoreInstanceState(Parcelable state) {
        SavedState ss = (SavedState) state;
        super.onRestoreInstanceState(ss.getSuperState());
        mViewAbove.setCurrentItem(ss.getItem());
    }
    /*
     * (non-Javadoc)
     *
     * @see android.view.ViewGroup#fitSystemWindows(android.graphics.Rect)
     */
    @SuppressLint("NewApi")
    @Override
    protected boolean fitSystemWindows(Rect insets) {
        int leftPadding = insets.left;
        int rightPadding = insets.right;
        int topPadding = insets.top;
        int bottomPadding = insets.bottom;
        if (!mActionbarOverlay) {
            Log.v(TAG, "setting padding!");
            setPadding(leftPadding, topPadding, rightPadding, bottomPadding);
        }
        return true;
    }
    @TargetApi(Build.VERSION_CODES.HONEYCOMB)
    public void manageLayers(float percentOpen) {
        if (Build.VERSION.SDK_INT < 11)
            return;
        boolean layer = percentOpen > 0.0f && percentOpen < 1.0f;
        final int layerType = layer ? View.LAYER_TYPE_HARDWARE
                : View.LAYER_TYPE_NONE;
        if (layerType != getContent().getLayerType()) {
            getHandler().post(new Runnable() {
                public void run() {
                    Log.v(TAG, "changing layerType. hardware? "
                            + (layerType == View.LAYER_TYPE_HARDWARE));
                    getContent().setLayerType(layerType, null);
                    getMenu().setLayerType(layerType, null);
                    if (getSecondaryMenu() != null) {
                        getSecondaryMenu().setLayerType(layerType, null);
                    }
                }
            });
        }
    }
}
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public class CustomViewAbove extends ViewGroup {
    private static final String TAG = "CustomViewAbove";
    private static final boolean DEBUG = false;
    private static final boolean USE_CACHE = false;
    private static final int MAX_SETTLE_DURATION = 600; // ms
    private static final int MIN_DISTANCE_FOR_FLING = 25; // dips
    private static final Interpolator sInterpolator = new Interpolator() {
        public float getInterpolation(float t) {
            t -= 1.0f;
            return t * t * t * t * t + 1.0f;
        }
    };
    private View mContent;
    private int mCurItem;
    private Scroller mScroller;
    private boolean mScrollingCacheEnabled;
    private boolean mScrolling;
    private boolean mIsBeingDragged;
    private boolean mIsUnableToDrag;
    private int mTouchSlop;
    private float mInitialMotionX;
    /**
     * Position of the last motion event.
     */
    private float mLastMotionX;
    private float mLastMotionY;
    /**
     * ID of the active pointer. This is used to retain consistency during
     * drags/flings if multiple pointers are used.
     */
    protected int mActivePointerId = INVALID_POINTER;
    /**
     * Sentinel value for no current active pointer.
     * Used by {@link #mActivePointerId}.
     */
    private static final int INVALID_POINTER = -1;
        /** 保存转场动画的变量*/
    private CanvasTransformer mTransformer;
    /**
     * Determines speed during touch scrolling
     */
    protected VelocityTracker mVelocityTracker;
    private int mMinimumVelocity;
    protected int mMaximumVelocity;
    private int mFlingDistance;
    private CustomViewBehind mViewBehind;
    //  private int mMode;
    private boolean mEnabled = true;
    private OnPageChangeListener mOnPageChangeListener;
    private OnPageChangeListener mInternalPageChangeListener;
    //  private OnCloseListener mCloseListener;
    //  private OnOpenListener mOpenListener;
    private OnClosedListener mClosedListener;
    private OnOpenedListener mOpenedListener;
    private List<View> mIgnoredViews = new ArrayList<View>();
    //  private int mScrollState = SCROLL_STATE_IDLE;
    /**
     * Callback interface for responding to changing state of the selected page.
     */
    public interface OnPageChangeListener {
        /**
         * This method will be invoked when the current page is scrolled, either as part
         * of a programmatically initiated smooth scroll or a user initiated touch scroll.
         *
         * @param position Position index of the first page currently being displayed.
         *                 Page position+1 will be visible if positionOffset is nonzero.
         * @param positionOffset Value from [0, 1) indicating the offset from the page at position.
         * @param positionOffsetPixels Value in pixels indicating the offset from position.
         */
        public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels);
        /**
         * This method will be invoked when a new page becomes selected. Animation is not
         * necessarily complete.
         *
         * @param position Position index of the new selected page.
         */
        public void onPageSelected(int position);
    }
    /**
     * Simple implementation of the {@link OnPageChangeListener} interface with stub
     * implementations of each method. Extend this if you do not intend to override
     * every method of {@link OnPageChangeListener}.
     */
    public static class SimpleOnPageChangeListener implements OnPageChangeListener {
        public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
            // This space for rent
        }
        public void onPageSelected(int position) {
            // This space for rent
        }
        public void onPageScrollStateChanged(int state) {
            // This space for rent
        }
    }
    public CustomViewAbove(Context context) {
        this(context, null);
    }
    public CustomViewAbove(Context context, AttributeSet attrs) {
        super(context, attrs);
        initCustomViewAbove();
    }
    void initCustomViewAbove() {
        setWillNotDraw(false);
        setDescendantFocusability(FOCUS_AFTER_DESCENDANTS);
        setFocusable(true);
        final Context context = getContext();
        mScroller = new Scroller(context, sInterpolator);
        final ViewConfiguration configuration = ViewConfiguration.get(context);
        mTouchSlop = ViewConfigurationCompat.getScaledPagingTouchSlop(configuration);
        mMinimumVelocity = configuration.getScaledMinimumFlingVelocity();
        mMaximumVelocity = configuration.getScaledMaximumFlingVelocity();
        setInternalPageChangeListener(new SimpleOnPageChangeListener() {
            public void onPageSelected(int position) {
                if (mViewBehind != null) {
                    switch (position) {
                    case 0:
                    case 2:
                        mViewBehind.setChildrenEnabled(true);
                        break;
                    case 1:
                        mViewBehind.setChildrenEnabled(false);
                        break;
                    }
                }
            }
        });
        final float density = context.getResources().getDisplayMetrics().density;
        mFlingDistance = (int) (MIN_DISTANCE_FOR_FLING * density);
    }
    /**
     * Set the currently selected page. If the CustomViewPager has already been through its first
     * layout there will be a smooth animated transition between the current item and the
     * specified item.
     *
     * @param item Item index to select
     */
    public void setCurrentItem(int item) {
        setCurrentItemInternal(item, true, false);
    }
    /**
     * Set the currently selected page.
     *
     * @param item Item index to select
     * @param smoothScroll True to smoothly scroll to the new item, false to transition immediately
     */
    public void setCurrentItem(int item, boolean smoothScroll) {
        setCurrentItemInternal(item, smoothScroll, false);
    }
    public int getCurrentItem() {
        return mCurItem;
    }
    void setCurrentItemInternal(int item, boolean smoothScroll, boolean always) {
        setCurrentItemInternal(item, smoothScroll, always, 0);
    }
    void setCurrentItemInternal(int item, boolean smoothScroll, boolean always, int velocity) {
        if (!always && mCurItem == item) {
            setScrollingCacheEnabled(false);
            return;
        }
        item = mViewBehind.getMenuPage(item);
        final boolean dispatchSelected = mCurItem != item;
        mCurItem = item;
        final int destX = getDestScrollX(mCurItem);
        if (dispatchSelected && mOnPageChangeListener != null) {
            mOnPageChangeListener.onPageSelected(item);
        }
        if (dispatchSelected && mInternalPageChangeListener != null) {
            mInternalPageChangeListener.onPageSelected(item);
        }
        if (smoothScroll) {
            smoothScrollTo(destX, 0, velocity);
        } else {
            completeScroll();
            scrollTo(destX, 0);
        }
    }
    /**
     * Set a listener that will be invoked whenever the page changes or is incrementally
     * scrolled. See {@link OnPageChangeListener}.
     *
     * @param listener Listener to set
     */
    public void setOnPageChangeListener(OnPageChangeListener listener) {
        mOnPageChangeListener = listener;
    }
    /*
    public void setOnOpenListener(OnOpenListener l) {
        mOpenListener = l;
    }
    public void setOnCloseListener(OnCloseListener l) {
        mCloseListener = l;
    }
     */
    public void setOnOpenedListener(OnOpenedListener l) {
        mOpenedListener = l;
    }
    public void setOnClosedListener(OnClosedListener l) {
        mClosedListener = l;
    }
    /**
     * Set a separate OnPageChangeListener for internal use by the support library.
     *
     * @param listener Listener to set
     * @return The old listener that was set, if any.
     */
    OnPageChangeListener setInternalPageChangeListener(OnPageChangeListener listener) {
        OnPageChangeListener oldListener = mInternalPageChangeListener;
        mInternalPageChangeListener = listener;
        return oldListener;
    }
    public void addIgnoredView(View v) {
        if (!mIgnoredViews.contains(v)) {
            mIgnoredViews.add(v);
        }
    }
    public void removeIgnoredView(View v) {
        mIgnoredViews.remove(v);
    }
    public void clearIgnoredViews() {
        mIgnoredViews.clear();
    }
    // We want the duration of the page snap animation to be influenced by the distance that
    // the screen has to travel, however, we don't want this duration to be effected in a
    // purely linear fashion. Instead, we use this method to moderate the effect that the distance
    // of travel has on the overall snap duration.
    float distanceInfluenceForSnapDuration(float f) {
        f -= 0.5f; // center the values about 0.
        f *= 0.3f * Math.PI / 2.0f;
        return (float) FloatMath.sin(f);
    }
    public int getDestScrollX(int page) {
        switch (page) {
        case 0:
        case 2:
            return mViewBehind.getMenuLeft(mContent, page);
        case 1:
            return mContent.getLeft();
        }
        return 0;
    }
    private int getLeftBound() {
        return mViewBehind.getAbsLeftBound(mContent);
    }
    private int getRightBound() {
        return mViewBehind.getAbsRightBound(mContent);
    }
    public int getContentLeft() {
        return mContent.getLeft() + mContent.getPaddingLeft();
    }
    public boolean isMenuOpen() {
        return mCurItem == 0 || mCurItem == 2;
    }
    private boolean isInIgnoredView(MotionEvent ev) {
        Rect rect = new Rect();
        for (View v : mIgnoredViews) {
            v.getHitRect(rect);
            if (rect.contains((int)ev.getX(), (int)ev.getY())) return true;
        }
        return false;
    }
    public int getBehindWidth() {
        if (mViewBehind == null) {
            return 0;
        } else {
            return mViewBehind.getBehindWidth();
        }
    }
    public int getChildWidth(int i) {
        switch (i) {
        case 0:
            return getBehindWidth();
        case 1:
            return mContent.getWidth();
        default:
            return 0;
        }
    }
    public boolean isSlidingEnabled() {
        return mEnabled;
    }
    public void setSlidingEnabled(boolean b) {
        mEnabled = b;
    }
    /**
     * Like {@link View#scrollBy}, but scroll smoothly instead of immediately.
     *
     * @param x the number of pixels to scroll by on the X axis
     * @param y the number of pixels to scroll by on the Y axis
     */
    void smoothScrollTo(int x, int y) {
        smoothScrollTo(x, y, 0);
    }
    /**
     * Like {@link View#scrollBy}, but scroll smoothly instead of immediately.
     *
     * @param x the number of pixels to scroll by on the X axis
     * @param y the number of pixels to scroll by on the Y axis
     * @param velocity the velocity associated with a fling, if applicable. (0 otherwise)
     */
    void smoothScrollTo(int x, int y, int velocity) {
        if (getChildCount() == 0) {
            // Nothing to do.
            setScrollingCacheEnabled(false);
            return;
        }
        int sx = getScrollX();
        int sy = getScrollY();
        int dx = x - sx;
        int dy = y - sy;
        if (dx == 0 && dy == 0) {
            completeScroll();
            if (isMenuOpen()) {
                if (mOpenedListener != null)
                    mOpenedListener.onOpened();
            } else {
                if (mClosedListener != null)
                    mClosedListener.onClosed();
            }
            return;
        }
        setScrollingCacheEnabled(true);
        mScrolling = true;
        final int width = getBehindWidth();
        final int halfWidth = width / 2;
        final float distanceRatio = Math.min(1f, 1.0f * Math.abs(dx) / width);
        final float distance = halfWidth + halfWidth *
                distanceInfluenceForSnapDuration(distanceRatio);
        int duration = 0;
        velocity = Math.abs(velocity);
        if (velocity > 0) {
            duration = 4 * Math.round(1000 * Math.abs(distance / velocity));
        } else {
            final float pageDelta = (float) Math.abs(dx) / width;
            duration = (int) ((pageDelta + 1) * 100);
            duration = MAX_SETTLE_DURATION;
        }
        duration = Math.min(duration, MAX_SETTLE_DURATION);
        mScroller.startScroll(sx, sy, dx, dy, duration);
        invalidate();
    }
    public void setContent(View v) {
        if (mContent != null)
            this.removeView(mContent);
        mContent = v;
        addView(mContent);
    }
    public View getContent() {
        return mContent;
    }
    public void setCustomViewBehind(CustomViewBehind cvb) {
        mViewBehind = cvb;
    }
    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        int width = getDefaultSize(0, widthMeasureSpec);
        int height = getDefaultSize(0, heightMeasureSpec);
        setMeasuredDimension(width, height);
        final int contentWidth = getChildMeasureSpec(widthMeasureSpec, 0, width);
        final int contentHeight = getChildMeasureSpec(heightMeasureSpec, 0, height);
        mContent.measure(contentWidth, contentHeight);
    }
    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        super.onSizeChanged(w, h, oldw, oldh);
        // Make sure scroll position is set correctly.
        if (w != oldw) {
            // [ChrisJ] - This fixes the onConfiguration change for orientation issue..
            // maybe worth having a look why the recomputeScroll pos is screwing
            // up?
            completeScroll();
            scrollTo(getDestScrollX(mCurItem), getScrollY());
        }
    }
    @Override
    protected void onLayout(boolean changed, int l, int t, int r, int b) {
        final int width = r - l;
        final int height = b - t;
        mContent.layout(0, 0, width, height);
    }
    public void setAboveOffset(int i) {
        //      RelativeLayout.LayoutParams params = ((RelativeLayout.LayoutParams)mContent.getLayoutParams());
        //      params.setMargins(i, params.topMargin, params.rightMargin, params.bottomMargin);
        mContent.setPadding(i, mContent.getPaddingTop(),
                mContent.getPaddingRight(), mContent.getPaddingBottom());
    }
    @Override
    public void computeScroll() {
        if (!mScroller.isFinished()) {
            if (mScroller.computeScrollOffset()) {
                int oldX = getScrollX();
                int oldY = getScrollY();
                int x = mScroller.getCurrX();
                int y = mScroller.getCurrY();
                if (oldX != x || oldY != y) {
                    scrollTo(x, y);
                    pageScrolled(x);
                }
                // Keep on drawing until the animation has finished.
                invalidate();
                return;
            }
        }
        // Done with scroll, clean up state.
        completeScroll();
    }
    private void pageScrolled(int xpos) {
        final int widthWithMargin = getWidth();
        final int position = xpos / widthWithMargin;
        final int offsetPixels = xpos % widthWithMargin;
        final float offset = (float) offsetPixels / widthWithMargin;
        onPageScrolled(position, offset, offsetPixels);
    }
    /**
     * This method will be invoked when the current page is scrolled, either as part
     * of a programmatically initiated smooth scroll or a user initiated touch scroll.
     * If you override this method you must call through to the superclass implementation
     * (e.g. super.onPageScrolled(position, offset, offsetPixels)) before onPageScrolled
     * returns.
     *
     * @param position Position index of the first page currently being displayed.
     *                 Page position+1 will be visible if positionOffset is nonzero.
     * @param offset Value from [0, 1) indicating the offset from the page at position.
     * @param offsetPixels Value in pixels indicating the offset from position.
     */
    protected void onPageScrolled(int position, float offset, int offsetPixels) {
        if (mOnPageChangeListener != null) {
            mOnPageChangeListener.onPageScrolled(position, offset, offsetPixels);
        }
        if (mInternalPageChangeListener != null) {
            mInternalPageChangeListener.onPageScrolled(position, offset, offsetPixels);
        }
    }
    private void completeScroll() {
        boolean needPopulate = mScrolling;
        if (needPopulate) {
            // Done with scroll, no longer want to cache view drawing.
            setScrollingCacheEnabled(false);
            mScroller.abortAnimation();
            int oldX = getScrollX();
            int oldY = getScrollY();
            int x = mScroller.getCurrX();
            int y = mScroller.getCurrY();
            if (oldX != x || oldY != y) {
                scrollTo(x, y);
            }
            if (isMenuOpen()) {
                if (mOpenedListener != null)
                    mOpenedListener.onOpened();
            } else {
                if (mClosedListener != null)
                    mClosedListener.onClosed();
            }
        }
        mScrolling = false;
    }
    protected int mTouchMode = SlidingMenu.TOUCHMODE_MARGIN;
    public void setTouchMode(int i) {
        mTouchMode = i;
    }
    public int getTouchMode() {
        return mTouchMode;
    }
    private boolean thisTouchAllowed(MotionEvent ev) {
        int x = (int) (ev.getX() + mScrollX);
        if (isMenuOpen()) {
            return mViewBehind.menuOpenTouchAllowed(mContent, mCurItem, x);
        } else {
            switch (mTouchMode) {
            case SlidingMenu.TOUCHMODE_FULLSCREEN:
                return !isInIgnoredView(ev);
            case SlidingMenu.TOUCHMODE_NONE:
                return false;
            case SlidingMenu.TOUCHMODE_MARGIN:
                return mViewBehind.marginTouchAllowed(mContent, x);
            }
        }
        return false;
    }
    private boolean thisSlideAllowed(float dx) {
        boolean allowed = false;
        if (isMenuOpen()) {
            allowed = mViewBehind.menuOpenSlideAllowed(dx);
        } else {
            allowed = mViewBehind.menuClosedSlideAllowed(dx);
        }
        if (DEBUG)
            Log.v(TAG, "this slide allowed " + allowed + " dx: " + dx);
        return allowed;
    }
    private int getPointerIndex(MotionEvent ev, int id) {
        int activePointerIndex = MotionEventCompat.findPointerIndex(ev, id);
        if (activePointerIndex == -1)
            mActivePointerId = INVALID_POINTER;
        return activePointerIndex;
    }
    private boolean mQuickReturn = false;
    @Override
    public boolean onInterceptTouchEvent(MotionEvent ev) {
        if (!mEnabled)
            return false;
        final int action = ev.getAction() & MotionEventCompat.ACTION_MASK;
        if (DEBUG)
            if (action == MotionEvent.ACTION_DOWN)
                Log.v(TAG, "Received ACTION_DOWN");
        if (action == MotionEvent.ACTION_CANCEL || action == MotionEvent.ACTION_UP
                || (action != MotionEvent.ACTION_DOWN && mIsUnableToDrag)) {
            endDrag();
            return false;
        }
        switch (action) {
        case MotionEvent.ACTION_MOVE:
            determineDrag(ev);
            break;
        case MotionEvent.ACTION_DOWN:
            int index = MotionEventCompat.getActionIndex(ev);
            mActivePointerId = MotionEventCompat.getPointerId(ev, index);
            if (mActivePointerId == INVALID_POINTER)
                break;
            mLastMotionX = mInitialMotionX = MotionEventCompat.getX(ev, index);
            mLastMotionY = MotionEventCompat.getY(ev, index);
            if (thisTouchAllowed(ev)) {
                mIsBeingDragged = false;
                mIsUnableToDrag = false;
                if (isMenuOpen() && mViewBehind.menuTouchInQuickReturn(mContent, mCurItem, ev.getX() + mScrollX)) {
                    mQuickReturn = true;
                }
            } else {
                mIsUnableToDrag = true;
            }
            break;
        case MotionEventCompat.ACTION_POINTER_UP:
            onSecondaryPointerUp(ev);
            break;
        }
        if (!mIsBeingDragged) {
            if (mVelocityTracker == null) {
                mVelocityTracker = VelocityTracker.obtain();
            }
            mVelocityTracker.addMovement(ev);
        }
        return mIsBeingDragged || mQuickReturn;
    }
    @Override
    public boolean onTouchEvent(MotionEvent ev) {
        if (!mEnabled)
            return false;
        if (!mIsBeingDragged && !thisTouchAllowed(ev))
            return false;
        //      if (!mIsBeingDragged && !mQuickReturn)
        //          return false;
        final int action = ev.getAction();
        if (mVelocityTracker == null) {
            mVelocityTracker = VelocityTracker.obtain();
        }
        mVelocityTracker.addMovement(ev);
        switch (action & MotionEventCompat.ACTION_MASK) {
        case MotionEvent.ACTION_DOWN:
            /*
             * If being flinged and user touches, stop the fling. isFinished
             * will be false if being flinged.
             */
            completeScroll();
            // Remember where the motion event started
            int index = MotionEventCompat.getActionIndex(ev);
            mActivePointerId = MotionEventCompat.getPointerId(ev, index);
            mLastMotionX = mInitialMotionX = ev.getX();
            break;
        case MotionEvent.ACTION_MOVE:
            if (!mIsBeingDragged) {
                determineDrag(ev);
                if (mIsUnableToDrag)
                    return false;
            }
            if (mIsBeingDragged) {
                // Scroll to follow the motion event
                final int activePointerIndex = getPointerIndex(ev, mActivePointerId);
                if (mActivePointerId == INVALID_POINTER)
                    break;
                final float x = MotionEventCompat.getX(ev, activePointerIndex);
                final float deltaX = mLastMotionX - x;
                mLastMotionX = x;
                float oldScrollX = getScrollX();
                float scrollX = oldScrollX + deltaX;
                final float leftBound = getLeftBound();
                final float rightBound = getRightBound();
                if (scrollX < leftBound) {
                    scrollX = leftBound;
                } else if (scrollX > rightBound) {
                    scrollX = rightBound;
                }
                // Don't lose the rounded component
                mLastMotionX += scrollX - (int) scrollX;
                scrollTo((int) scrollX, getScrollY());
                pageScrolled((int) scrollX);
            }
            break;
        case MotionEvent.ACTION_UP:
            if (mIsBeingDragged) {
                final VelocityTracker velocityTracker = mVelocityTracker;
                velocityTracker.computeCurrentVelocity(1000, mMaximumVelocity);
                int initialVelocity = (int) VelocityTrackerCompat.getXVelocity(
                        velocityTracker, mActivePointerId);
                final int scrollX = getScrollX();
                final float pageOffset = (float) (scrollX - getDestScrollX(mCurItem)) / getBehindWidth();
                final int activePointerIndex = getPointerIndex(ev, mActivePointerId);
                if (mActivePointerId != INVALID_POINTER) {
                    final float x = MotionEventCompat.getX(ev, activePointerIndex);
                    final int totalDelta = (int) (x - mInitialMotionX);
                    int nextPage = determineTargetPage(pageOffset, initialVelocity, totalDelta);
                    setCurrentItemInternal(nextPage, true, true, initialVelocity);
                } else {   
                    setCurrentItemInternal(mCurItem, true, true, initialVelocity);
                }
                mActivePointerId = INVALID_POINTER;
                endDrag();
            } else if (mQuickReturn && mViewBehind.menuTouchInQuickReturn(mContent, mCurItem, ev.getX() + mScrollX)) {
                // close the menu
                setCurrentItem(1);
                endDrag();
            }
            break;
        case MotionEvent.ACTION_CANCEL:
            if (mIsBeingDragged) {
                setCurrentItemInternal(mCurItem, true, true);
                mActivePointerId = INVALID_POINTER;
                endDrag();
            }
            break;
        case MotionEventCompat.ACTION_POINTER_DOWN: {
            final int indexx = MotionEventCompat.getActionIndex(ev);
            mLastMotionX = MotionEventCompat.getX(ev, indexx);
            mActivePointerId = MotionEventCompat.getPointerId(ev, indexx);
            break;
        }
        case MotionEventCompat.ACTION_POINTER_UP:
            onSecondaryPointerUp(ev);
            int pointerIndex = getPointerIndex(ev, mActivePointerId);
            if (mActivePointerId == INVALID_POINTER)
                break;
            mLastMotionX = MotionEventCompat.getX(ev, pointerIndex);
            break;
        }
        return true;
    }
    private void determineDrag(MotionEvent ev) {
        final int activePointerId = mActivePointerId;
        final int pointerIndex = getPointerIndex(ev, activePointerId);
        if (activePointerId == INVALID_POINTER || pointerIndex == INVALID_POINTER)
            return;
        final float x = MotionEventCompat.getX(ev, pointerIndex);
        final float dx = x - mLastMotionX;
        final float xDiff = Math.abs(dx);
        final float y = MotionEventCompat.getY(ev, pointerIndex);
        final float dy = y - mLastMotionY;
        final float yDiff = Math.abs(dy);
        if (xDiff > (isMenuOpen()?mTouchSlop/2:mTouchSlop) && xDiff > yDiff && thisSlideAllowed(dx)) {       
            startDrag();
            mLastMotionX = x;
            mLastMotionY = y;
            setScrollingCacheEnabled(true);
            // TODO add back in touch slop check
        } else if (xDiff > mTouchSlop) {
            mIsUnableToDrag = true;
        }
    }
    @Override
    public void scrollTo(int x, int y) {
        super.scrollTo(x, y);
        mScrollX = x;
        mViewBehind.scrollBehindTo(mContent, x, y);
       ((SlidingMenu)getParent()).manageLayers(getPercentOpen());
        if (mTransformer != null) {
            invalidate();
        }
    }
    private int determineTargetPage(float pageOffset, int velocity, int deltaX) {
        int targetPage = mCurItem;
        if (Math.abs(deltaX) > mFlingDistance && Math.abs(velocity) > mMinimumVelocity) {
            if (velocity > 0 && deltaX > 0) {
                targetPage -= 1;
            } else if (velocity < 0 && deltaX < 0){
                targetPage += 1;
            }
        } else {
            targetPage = (int) Math.round(mCurItem + pageOffset);
        }
        return targetPage;
    }
    protected float getPercentOpen() {
        return Math.abs(mScrollX-mContent.getLeft()) / getBehindWidth();
    }
    @Override
    protected void dispatchDraw(Canvas canvas) {
        // 这句要注释掉,否则会出现2个右侧的视图,一个有转场动画,一个没有转场动画
                // super.dispatchDraw(canvas);
        // Draw the margin drawable if needed.
        mViewBehind.drawShadow(mContent, canvas);
        mViewBehind.drawFade(mContent, canvas, getPercentOpen());
        mViewBehind.drawSelector(mContent, canvas, getPercentOpen());
        // 设置右侧视图的转场效果,主要是修改Canvas。
        if (mTransformer != null) {
            canvas.save();
            mTransformer.transformCanvas(canvas, getPercentOpen());
            super.dispatchDraw(canvas);
            canvas.restore();
        } else {
            super.dispatchDraw(canvas);
        }
    }
    // variables for drawing
    private float mScrollX = 0.0f;
    private void onSecondaryPointerUp(MotionEvent ev) {
        if (DEBUG) Log.v(TAG, "onSecondaryPointerUp called");
        final int pointerIndex = MotionEventCompat.getActionIndex(ev);
        final int pointerId = MotionEventCompat.getPointerId(ev, pointerIndex);
        if (pointerId == mActivePointerId) {
            // This was our active pointer going up. Choose a new
            // active pointer and adjust accordingly.
            final int newPointerIndex = pointerIndex == 0 ? 1 : 0;
            mLastMotionX = MotionEventCompat.getX(ev, newPointerIndex);
            mActivePointerId = MotionEventCompat.getPointerId(ev, newPointerIndex);
            if (mVelocityTracker != null) {
                mVelocityTracker.clear();
            }
        }
    }
    private void startDrag() {
        mIsBeingDragged = true;
        mQuickReturn = false;
    }
    private void endDrag() {
        mQuickReturn = false;
        mIsBeingDragged = false;
        mIsUnableToDrag = false;
        mActivePointerId = INVALID_POINTER;
        if (mVelocityTracker != null) {
            mVelocityTracker.recycle();
            mVelocityTracker = null;
        }
    }
    private void setScrollingCacheEnabled(boolean enabled) {
        if (mScrollingCacheEnabled != enabled) {
            mScrollingCacheEnabled = enabled;
            if (USE_CACHE) {
                final int size = getChildCount();
                for (int i = 0; i < size; ++i) {
                    final View child = getChildAt(i);
                    if (child.getVisibility() != GONE) {
                        child.setDrawingCacheEnabled(enabled);
                    }
                }
            }
        }
    }
    /**
     * Tests scrollability within child views of v given a delta of dx.
     *
     * @param v View to test for horizontal scrollability
     * @param checkV Whether the view v passed should itself be checked for scrollability (true),
     *               or just its children (false).
     * @param dx Delta scrolled in pixels
     * @param x X coordinate of the active touch point
     * @param y Y coordinate of the active touch point
     * @return true if child views of v can be scrolled by delta of dx.
     */
    protected boolean canScroll(View v, boolean checkV, int dx, int x, int y) {
        if (v instanceof ViewGroup) {
            final ViewGroup group = (ViewGroup) v;
            final int scrollX = v.getScrollX();
            final int scrollY = v.getScrollY();
            final int count = group.getChildCount();
            // Count backwards - let topmost views consume scroll distance first.
            for (int i = count - 1; i >= 0; i--) {
                final View child = group.getChildAt(i);
                if (x + scrollX >= child.getLeft() && x + scrollX < child.getRight() &&
                        y + scrollY >= child.getTop() && y + scrollY < child.getBottom() &&
                        canScroll(child, true, dx, x + scrollX - child.getLeft(),
                                y + scrollY - child.getTop())) {
                    return true;
                }
            }
        }
        return checkV && ViewCompat.canScrollHorizontally(v, -dx);
    }
    @Override
    public boolean dispatchKeyEvent(KeyEvent event) {
        // Let the focused view and/or our descendants get the key first
        return super.dispatchKeyEvent(event) || executeKeyEvent(event);
    }
    /**
     * You can call this function yourself to have the scroll view perform
     * scrolling from a key event, just as if the event had been dispatched to
     * it by the view hierarchy.
     *
     * @param event The key event to execute.
     * @return Return true if the event was handled, else false.
     */
    public boolean executeKeyEvent(KeyEvent event) {
        boolean handled = false;
        if (event.getAction() == KeyEvent.ACTION_DOWN) {
            switch (event.getKeyCode()) {
            case KeyEvent.KEYCODE_DPAD_LEFT:
                handled = arrowScroll(FOCUS_LEFT);
                break;
            case KeyEvent.KEYCODE_DPAD_RIGHT:
                handled = arrowScroll(FOCUS_RIGHT);
                break;
            case KeyEvent.KEYCODE_TAB:
                if (Build.VERSION.SDK_INT >= 11) {
                    // The focus finder had a bug handling FOCUS_FORWARD and FOCUS_BACKWARD
                    // before Android 3.0. Ignore the tab key on those devices.
                    if (KeyEventCompat.hasNoModifiers(event)) {
                        handled = arrowScroll(FOCUS_FORWARD);
                    } else if (KeyEventCompat.hasModifiers(event, KeyEvent.META_SHIFT_ON)) {
                        handled = arrowScroll(FOCUS_BACKWARD);
                    }
                }
                break;
            }
        }
        return handled;
    }
    public boolean arrowScroll(int direction) {
        View currentFocused = findFocus();
        if (currentFocused == this) currentFocused = null;
        boolean handled = false;
        View nextFocused = FocusFinder.getInstance().findNextFocus(this, currentFocused,
                direction);
        if (nextFocused != null && nextFocused != currentFocused) {
            if (direction == View.FOCUS_LEFT) {
                handled = nextFocused.requestFocus();
            } else if (direction == View.FOCUS_RIGHT) {
                // If there is nothing to the right, or this is causing us to
                // jump to the left, then what we really want to do is page right.
                if (currentFocused != null && nextFocused.getLeft() <= currentFocused.getLeft()) {
                    handled = pageRight();
                } else {
                    handled = nextFocused.requestFocus();
                }
            }
        } else if (direction == FOCUS_LEFT || direction == FOCUS_BACKWARD) {
            // Trying to move left and nothing there; try to page.
            handled = pageLeft();
        } else if (direction == FOCUS_RIGHT || direction == FOCUS_FORWARD) {
            // Trying to move right and nothing there; try to page.
            handled = pageRight();
        }
        if (handled) {
            playSoundEffect(SoundEffectConstants.getContantForFocusDirection(direction));
        }
        return handled;
    }
    boolean pageLeft() {
        if (mCurItem > 0) {
            setCurrentItem(mCurItem-1, true);
            return true;
        }
        return false;
    }
    boolean pageRight() {
        if (mCurItem < 1) {
            setCurrentItem(mCurItem+1, true);
            return true;
        }
        return false;
    }
    public void setCanvasTransformer(CanvasTransformer t) {
        mTransformer = t;
    }
}

如果想要使用这个侧滑菜单的动画效果,直接替换这两个类即可。同时,并不会影响SlidingMenu的固有功能。

下面看看如何配置SlidingMenu实例。

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    SlidingMenu sm = getSlidingMenu();
    sm.setBehindOffsetRes(R.dimen.slidingmenu_offset);
    sm.setFadeEnabled(false);
    sm.setBehindScrollScale(0.25f);
    sm.setFadeDegree(0.25f);
    // 配置背景图片
    sm.setBackgroundImage(R.drawable.img_frame_background);
    // 设置专场动画效果
    sm.setBehindCanvasTransformer(new SlidingMenu.CanvasTransformer() {
        @Override
        public void transformCanvas(Canvas canvas, float percentOpen) {
            float scale = (float) (percentOpen * 0.25 + 0.75);
            canvas.scale(scale, scale, -canvas.getWidth() / 2,
                    canvas.getHeight() / 2);
        }
    });
    sm.setAboveCanvasTransformer(new SlidingMenu.CanvasTransformer() {
        @Override
        public void transformCanvas(Canvas canvas, float percentOpen) {
            float scale = (float) (1 - percentOpen * 0.25);
            canvas.scale(scale, scale, 0, canvas.getHeight() / 2);
        }
    });
}

大功告成!

最后,附上Demo的下载地址。

百度网盘    http://pan.baidu.com/s/1jGrASui

转自:http://www.open-open.com/lib/view/open1411269966859.html

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码字很辛苦,转载请注明来自技术联盟《Android RESideMenu侧滑菜单》

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