Android · 2016年10月11日 0

Android WebView 与登录状态保持一致，建立SESSION会话

在登陆界面获取验证码的时候:

new Thread(){
            @Override
            public void run() {
                try {
                    SharedPreferences spf = getSharedPreferences("Cookie", Context.MODE_PRIVATE);

                    HttpClient client = new DefaultHttpClient();
                    HttpGet get = new HttpGet(Gloable.DOLOAD+"code.gif");
                    HttpResponse response = client.execute(get);
                    Cookie cookie = ((AbstractHttpClient) client).getCookieStore().getCookies().get(0);
                    String sessionId = cookie.getValue();
                    SharedPreferences.Editor editor = spf.edit();
                    editor.putString("sessionId", sessionId);
                    String cookieString = cookie.getName()+"="+cookie.getValue()+
                            ";domain="+cookie.getDomain();
                    Log.e("test", "cookieString:"+cookieString);
                    editor.putString("cookieString", cookieString);
                    editor.commit();
                    Log.i("info", "b--JSESSIONID=" + sessionId);
                    if (response.getStatusLine().getStatusCode() == 200) {
                        byte[] bytes = EntityUtils.toByteArray(response.getEntity());
                        final Bitmap bitmap = BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
                        runOnUiThread(new Runnable() {
                            public void run() {
                                Drawable drawable = new BitmapDrawable(bitmap);
                                iv_showCode.setBackgroundDrawable(drawable);
                            }
                        });
                    }
                } catch (ClientProtocolException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }.start();

在webview加载url之前:

SharedPreferences spf = getSharedPreferences("Cookie", Context.MODE_PRIVATE);
        CookieSyncManager.createInstance(this);
        CookieManager cookieManager = CookieManager.getInstance();
        String cookieString = spf.getString("cookieString", "");
        cookieManager.setCookie(url, cookieString);
        CookieSyncManager.getInstance().sync();

        webview.loadUrl(url);
android客户端通过httpClient或者httpUrlConnection进行登录后，为了把登录状态同步到webView中，这时需要进行cookie的同步

一.cookie同步方式

下面是登录线程:

public class LoginThread extends Thread{

private Handler loginHandler;

public  LoginThread(Handler loginHandler) {
this.loginHandler = loginHandler;
}
@Override
public void run()
{
List<String> cookieLst = new ArrayList<String>();
HttpParams httpParams = new BasicHttpParams();
ConnManagerParams.setMaxTotalConnections(httpParams, 5);
ConnManagerParams.setTimeout(httpParams, 15*1000);
HttpConnectionParams.setSoTimeout(httpParams, 10*1000);
HttpConnectionParams.setTcpNoDelay(httpParams, true);
HttpPost httpPost = new HttpPost(“http://192.168.1.107/cookie/login.php”);
List<NameValuePair> nvPairs = new ArrayList<NameValuePair>();
nvPairs.add(new BasicNameValuePair(“name”, “lisi”));
nvPairs.add(new BasicNameValuePair(“age”,”22″));
nvPairs.add(new BasicNameValuePair(“gender”, “男”));

try {
UrlEncodedFormEntity entity = new UrlEncodedFormEntity(nvPairs, HTTP.UTF_8);
httpPost.setEntity(entity);
HttpClient httpClient =  new DefaultHttpClient();
HttpResponse httpResponse = httpClient.execute(httpPost);
if(httpResponse!=null && httpResponse.getStatusLine().getStatusCode()==HttpStatus.SC_OK)
{
String content = EntityUtils.toString(httpResponse.getEntity());
Log.d(“LOGIN”, content);
Header[] allHeaders = httpResponse.getAllHeaders();
if(allHeaders!=null)
{
//获取cookie的第一种方式
for (Header header : allHeaders)
{
Log.d(“LOGIN”, header.getName()+”=”+header.getValue());
if(“Set-Cookie”.equalsIgnoreCase(header.getName()))
{
cookieLst.add(header.getValue());
}
}
}
//获取cookie的第二种方式
AbstractHttpClient abstractHttpClient = (AbstractHttpClient) httpClient;
CookieStore cookieStore = abstractHttpClient.getCookieStore();
List<Cookie> cookies = cookieStore.getCookies();
for (Cookie cookie : cookies)
{
Log.d(“LOGIN-COOKIE”, cookie.getName()+”=”+cookie.getValue()+”,path=”+cookie.getPath()+”,domain=”+cookie.getDomain()+”,expires=”+cookie.getExpiryDate());
}

if(loginHandler!=null)
{
Message msg = new Message();
msg.obj = cookieLst;
msg.what = 200;
msg.setTarget(loginHandler);
msg.sendToTarget();
}
}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
下面是WebView主页面Activity

@TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH)
public class Main extends Activity implements DownloadListener {

private WebView mWebView;

//extraHeaders经测试不可以同步cookie
private Map<String, String> extraHeaders;

private final String TAG = “WEB_VIEW”;

private final Handler loginHandler = new Handler(){

@Override
public void handleMessage(Message msg) {

if(msg.what==200)
{
List<String> cookies =  (List<String>) msg.obj;
if(cookies!=null)
{
syncCookieToWebView(cookies);
mWebView.loadUrl(“http://192.168.1.107/cookie/read.php”);
}
}else{
super.handleMessage(msg);
}
}

};

@SuppressLint(“SetJavaScriptEnabled”)
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mWebView = (WebView) findViewById(R.id.main_webview);
WebSettings settings = mWebView.getSettings();
settings.setAppCacheEnabled(true);
settings.setCacheMode(WebSettings.LOAD_DEFAULT);
settings.setGeolocationEnabled(true);
settings.setUseWideViewPort(true);
settings.setSaveFormData(true);
settings.setSavePassword(true);
settings.setSupportZoom(false);
settings.setLoadsImagesAutomatically(true);
settings.setBlockNetworkImage(false);
if(android.os.Build.VERSION.SDK_INT>=11)
{
settings.setEnableSmoothTransition(true);
}
settings.setJavaScriptCanOpenWindowsAutomatically(false);
settings.setAllowFileAccess(false);
settings.setJavaScriptEnabled(true);
String userAgent = settings.getUserAgentString();
Log.d(TAG, userAgent);
if(android.os.Build.VERSION.SDK_INT>=14)
{
mWebView.setFitsSystemWindows(true);
}
if(mWebView.isHardwareAccelerated())
{
mWebView.setLayerType(View.LAYER_TYPE_HARDWARE, null);
}
mWebView.setKeepScreenOn(true);
extraHeaders = new IdentityHashMap<String, String>();

mWebView.setWebViewClient(new WebViewClient(){
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if(view!=null && !TextUtils.isEmpty(url))
{
extraHeaders.put(“control-cache”, “no-cache,private”);
extraHeaders.put(“pragma”, “no-cache,no-store”);
extraHeaders.put(“expires”, “0”);
view.loadUrl(url, extraHeaders);
return true;
}
return super.shouldOverrideUrlLoading(view, url);
}
});

mWebView.setDownloadListener(this);

//mWebView.loadUrl(“http://shouji.baidu.com/software/?from=web_alad_multi”);
new LoginThread(loginHandler).start();
}
//销毁webView
@Override
protected void onDestroy() {
super.onDestroy();
mWebView.clearFormData();
mWebView.clearHistory();
mWebView.destroy();
}

//监听文件下载，WebView不会自动下载，需要我们自己构建下载代码
@Override
public void onDownloadStart(String url, String userAgent,String contentDisposition, String mimetype, long contentLength)
{
Log.d(TAG, “url=”+url);
Log.d(TAG, “userAgent=”+url);
Log.d(TAG, “contentDisposition=”+contentDisposition);
Log.d(TAG, “mimetype=”+mimetype);
Log.d(TAG, “contentLength=”+contentLength);

//第一种下载方式是 自定义的http工具类
//new DownloadThread(url,contentDisposition,mimetype,contentLength).start();

//第二种下载方式是调用系统的webView,具有默认的进度条
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setData(Uri.parse(url));
startActivity(intent);

}
/**
* cookie同步
*/
private void syncCookieToWebView(List<String> cookies)
{
CookieSyncManager.createInstance(Main.this);
CookieManager cm = CookieManager.getInstance();
cm.setAcceptCookie(true);
if(cookies!=null)
{
for (String cookie : cookies)
{
cm.setCookie(“http://192.168.1.107:80”,cookie);//注意端口号和域名，这种方式可以同步所有cookie，包括sessionid
}
}
CookieSyncManager.getInstance().sync();
}
}

二.注意:平时开发中Cookie同步是最佳选项，但这并不意味着一定需要使用cookie同步，我们可以使用  token+用户id+登录时间校验码  进行同步登录

三.对于使用javaInterface进行同步登录的问题

javaInterface风险性很高，如果android平台是 4.2+比较安全，但4.2以下版本，安全性不容乐观，比如通过反射造成硬盘被读写的可能性很高！

在android 4.2中增加了 @javainterface注解，并且将公开的方法异步化，这样有效的控制了某些没必要公开的方法被无意间作为接口公开，导致js发射到硬盘的读写io类，从而发生文件被窃取，垃圾文件堆积，有害文件被下载等问题！

四.目前来说让所有人使用 4.2+以上版本可能性不大，但尽量少使用javainterface,转而使用  协议的方式，所谓协议，就是通信协议，我们可以分析url参数，从而进行webView和native代码的通信

mWebView.setWebViewClient(new WebViewClient(){
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {

//捕获url的参数值

if(url.indexOf(“login”)>=0)
{
//客户端代码执行某部分操作—–>执行完毕后通过url参数把执行结果返回webView

}else if(url.indexOf(“userCenter”)>=0){
//客户端代码执行某部分操作—–>执行完毕后通过url参数把执行结果返回webView
}
return super.shouldOverrideUrlLoading(view, url);
}
});
当然，javainterface不推荐，但完全可以使用

?
1
view.loadUrl(“javascript:dosometing(“+”‘参数'”+”)”);

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