个人笔记：通用 application1、收集所有 avtivity 用于彻底退出应用2、捕获崩溃异常,保存错误日志,并重启应用public class HKBaseApplication extends Application {    // activity对象列表,用于activity统一管理    private List<Activity> activityList;    // 异常捕获    protected boolean isNeedCaughtExeption = true;// 是否捕获未知异常    private PendingIntent restartIntent;    private MyUncaughtExceptionHandler uncaughtExceptionHandler;    private String packgeName;    @Override    public void onCreate() {        super.onCreate();        activityList = new ArrayList<Activity>();        packgeName = getPackageName();        if (isNeedCaughtExeption) {            cauchException();        }    }    // -------------------异常捕获-----捕获异常后重启系统-----------------//    private void cauchException() {        Intent intent = new Intent();        // 参数1：包名，参数2：程序入口的activity        intent.setClassName(packgeName, packgeName + ".LoginActivity");        restartIntent = PendingIntent.getActivity(getApplicationContext(), -1, intent,                Intent.FLAG_ACTIVITY_NEW_TASK);        // 程序崩溃时触发线程        uncaughtExceptionHandler = new MyUncaughtExceptionHandler();        Thread.setDefaultUncaughtExceptionHandler(uncaughtExceptionHandler);    }    // 创建服务用于捕获崩溃异常    private class MyUncaughtExceptionHandler implements UncaughtExceptionHandler {        @Override        public void uncaughtException(Thread thread, Throwable ex) {            // 保存错误日志            saveCatchInfo2File(ex);            // 1秒钟后重启应用            AlarmManager mgr = (AlarmManager) getSystemService(Context.ALARM_SERVICE);            mgr.set(AlarmManager.RTC, System.currentTimeMillis() + 1000, restartIntent);            // 关闭当前应用            finishAllActivity();            finishProgram();        }    };    /**     * 保存错误信息到文件中     *      * @return 返回文件名称     */    private String saveCatchInfo2File(Throwable ex) {        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();        String sb = writer.toString();        try {            DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss");            String time = formatter.format(new Date());            String fileName = time + ".txt";            System.out.println("fileName:" + fileName);            if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {                String filePath = Environment.getExternalStorageDirectory() + "/HKDownload/" + packgeName                        + "/crash/";                File dir = new File(filePath);                if (!dir.exists()) {                    if (!dir.mkdirs()) {                        // 创建目录失败: 一般是因为SD卡被拔出了                        return "";                    }                }                System.out.println("filePath + fileName:" + filePath + fileName);                FileOutputStream fos = new FileOutputStream(filePath + fileName);                fos.write(sb.getBytes());                fos.close();                //文件保存完了之后,在应用下次启动的时候去检查错误日志,发现新的错误日志,就发送给开发者            }            return fileName;        } catch (Exception e) {            System.out.println("an error occured while writing file..." + e.getMessage());        }        return null;    }    // ------------------------------activity管理-----------------------//    // activity管理：从列表中移除activity    public void removeActivity(Activity activity) {        activityList.remove(activity);    }    // activity管理：添加activity到列表    public void addActivity(Activity activity) {        activityList.add(activity);    }    // activity管理：结束所有activity    public void finishAllActivity() {        for (Activity activity : activityList) {            if (null != activity) {                activity.finish();            }        }    }    // 结束线程,一般与finishAllActivity()一起使用    // 例如: finishAllActivity;finishProgram();    public void finishProgram() {        android.os.Process.killProcess(android.os.Process.myPid());    }}