Android系统的“程序异常退出”，给应用的用户体验造成不良影响。为了捕获应用运行时异常并给出友好提示，便可继承UncaughtExceptionHandler类来处理。通过Thread.setDefaultUncaughtExceptionHandler()方法将异常处理类设置到线程上即可。
1、异常处理类，代码如下：
- public class CrashHandler implements UncaughtExceptionHandler {
- public static final String TAG = “CrashHandler”;
- private static CrashHandler INSTANCE = new CrashHandler();
- private Context mContext;
- private Thread.UncaughtExceptionHandler mDefaultHandler;
- private CrashHandler() {
- }
- public static CrashHandler getInstance() {
- return INSTANCE;
- }
- public void init(Context ctx) {
- mContext = ctx;
- mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();
- Thread.setDefaultUncaughtExceptionHandler(this);
- }
- @Override
- public void uncaughtException(Thread thread, Throwable ex) {
- // if (!handleException(ex) && mDefaultHandler != null) {
- // mDefaultHandler.uncaughtException(thread, ex);
- // } else {
- // android.os.Process.killProcess(android.os.Process.myPid());
- // System.exit(10);
- // }
- System.out.println(“uncaughtException”);
- new Thread() {
- @Override
- public void run() {
- Looper.prepare();
- new AlertDialog.Builder(mContext).setTitle(“提示”).setCancelable(false)
- .setMessage(“程序崩溃了…”).setNeutralButton(“我知道了”, new OnClickListener() {
- @Override
- public void onClick(DialogInterface dialog, int which) {
- System.exit(0);
- }
- })
- .create().show();
- Looper.loop();
- }
- }.start();
- }
- /**
- * 自定义错误处理,收集错误信息 发送错误报告等操作均在此完成. 开发者可以根据自己的情况来自定义异常处理逻辑
- *
- * @param ex
- * @return true:如果处理了该异常信息;否则返回false
- */
- private boolean handleException(Throwable ex) {
- if (ex == null) {
- return true;
- }
- // new Handler(Looper.getMainLooper()).post(new Runnable() {
- // @Override
- // public void run() {
- // new AlertDialog.Builder(mContext).setTitle(“提示”)
- // .setMessage(“程序崩溃了…”).setNeutralButton(“我知道了”, null)
- // .create().show();
- // }
- // });
- return true;
- }
- }
2、线程绑定异常处理类
- public class CrashHandlerActivity extends Activity {
- /** Called when the activity is first created. */
- @Override
- public void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.main);
- CrashHandler crashHandler = CrashHandler.getInstance();
- crashHandler.init(this); //传入参数必须为Activity，否则AlertDialog将不显示。
- // 创建错误
- throw new NullPointerException();
- }
- }
Demo下载地址：http://code.google.com/p/android-custom-view/downloads/list
转载地址: http://orgcent.com/android-uncaughtexceptionhandler-exception/ | 萝卜白菜的博客
