public class MyUncaughtExceptionHandler implements UncaughtExceptionHandler {  private static final String TAG = "MyUncaughtExceptionHandler";  // 將錯誤信息保存到sharepreference中  private static SharedPreferences bugPreferences;  private static SharedPreferences.Editor bugEditor;  private static Context mContext;  private static PackageInfo packageInfo;  private UncaughtExceptionHandler defaultUncaughtExceptionHandler;  private static HandleProgressDialog progressDialog;  // 保存錯誤原因的字段  private static String bugExistStr = "";  private static Handler handler = new Handler() {    @Override    public void handleMessage(Message msg) {      progressDialog.dismiss();    }  };  public MyUncaughtExceptionHandler(Context context) {    try {      mContext = context;      packageInfo = context.getPackageManager().getPackageInfo(          context.getPackageName(), 0);      bugPreferences = context.getSharedPreferences("bug", 0);      bugEditor = bugPreferences.edit();      defaultUncaughtExceptionHandler = Thread          .getDefaultUncaughtExceptionHandler();    } catch (NameNotFoundException e) {      e.printStackTrace();    } catch (Exception e) {      e.printStackTrace();    }  }  // 當異常發生時，會調用這個方法  public void uncaughtException(Thread th, Throwable t) {    try {      // 保存bug      saveBugText(t);      defaultUncaughtExceptionHandler.uncaughtException(th, t);    } catch (FileNotFoundException e) {      e.printStackTrace();    } catch (Exception e) {      e.printStackTrace();    }  }  private void saveBugText(Throwable ex) throws FileNotFoundException {    Writer writer = new StringWriter();    PrintWriter printWriter = new PrintWriter(writer);    ex.printStackTrace(printWriter);    Throwable cause = ex.getCause();    while (cause != null) {      cause.printStackTrace(printWriter);      cause = cause.getCause();    }    printWriter.close();    bugEditor.putString("bugText", writer.toString());    bugEditor.commit();  }  // 下次開啟應用的時候，如果上次產生了未知異常則顯示對話框應用與用戶反饋  public static void showBugReportDialog(final Context context) {    bugExistStr = context.getSharedPreferences("bug", 0).getString(        "bugText", "");    if (bugExistStr != null && !bugExistStr.equals("")) {      AlertDialog.Builder builder = new AlertDialog.Builder(context);      builder.setTitle(R.string.bug_report);      builder.setMessage(R.string.whether_report_to_developer);      builder.setNegativeButton(R.string.cancel, new OnClickListener() {        public void onClick(DialogInterface dialog, int which) {          finish(dialog);        }      });      builder.setPositiveButton(R.string.send, new OnClickListener() {        public void onClick(DialogInterface dialog, int which) {          // 提交bug到服務器          postBugReportInBackground(context);          dialog.dismiss();        }      });      AlertDialog dialog = builder.create();      dialog.show();    }  }  private static void postBugReportInBackground(final Context context) {    progressDialog = new HandleProgressDialog(context);    progressDialog.show();    new Thread(new Runnable() {      public void run() {        postBugReport();        // 將之前的bug信息清除掉        if (bugExistStr != null) {          bugEditor.putString("bugText", "");          bugEditor.commit();        }        handler.sendEmptyMessage(0);      }    }).start();  }  /**   * Send Bug Report.   */  private static void postBugReport() {    List<NameValuePair> nvps = new ArrayList<NameValuePair>();    nvps.add(new BasicNameValuePair("device", Build.DEVICE));    nvps.add(new BasicNameValuePair("model", Build.MODEL));    nvps.add(new BasicNameValuePair("sdk-version", Build.VERSION.SDK));    nvps.add(new BasicNameValuePair("apk-version", packageInfo.versionName));    nvps.add(new BasicNameValuePair("bug", bugExistStr));    try {      HttpPost httpPost = new HttpPost(Constants.BaseUrl          + "c=main&a=androidCrash");      httpPost.setEntity(new UrlEncodedFormEntity(nvps, HTTP.UTF_8));      DefaultHttpClient httpClient = new DefaultHttpClient();      HttpParams params = httpClient.getParams();      HttpConnectionParams.setConnectionTimeout(params, 5000);      HttpConnectionParams.setSoTimeout(params, 5000);      httpClient.execute(httpPost);    } catch (IOException e) {      e.printStackTrace();    } catch (Exception e) {      e.printStackTrace();    }  }  private static void finish(DialogInterface dialog) {    if (bugExistStr != null) {      bugEditor.putString("bugText", "");      bugEditor.commit();    }    dialog.dismiss();  }}

@Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    appApplication = (APPApplication) getApplication();    appApplication.activites.add(this);    initViews();    Thread.setDefaultUncaughtExceptionHandler(new MyUncaughtExceptionHandler(        MainActivity.this));    MyUncaughtExceptionHandler.showBugReportDialog(this);  }