Android APP重启的几种方法

项目开发过程中需要实现重启App的功能，常用的可行方案有：

1. 使用 FLAG_ACTIVITY_CLEAR_TOP ：

new Handler().postDelayed(new Runnable() {
                    @Override
                    public void run() {
                        Intent LaunchIntent = getPackageManager().getLaunchIntentForPackage(getApplication().getPackageName());
                        LaunchIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
                        startActivity(LaunchIntent);
                    }
                }, 100);// 1秒钟后重启应用

2. 使用 AlarmManager ：

Intent intent = getPackageManager()
                        .getLaunchIntentForPackage(getApplication().getPackageName());
                PendingIntent restartIntent = PendingIntent.getActivity(getApplicationContext(), 0, intent, 0);
                AlarmManager mgr = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
                mgr.set(AlarmManager.RTC, System.currentTimeMillis() + 1000, restartIntent); // 1秒钟后重启应用
                System.exit(0);

3.使用Service

开启一个Service，然后自己杀死APP的进程，最后在Service里通过包名来启动一个APP并销毁Service。

（1）RestartAPPTool.java

public class RestartAPPTool {

    /**
     * 重启整个APP
     * @param context
     * @param Delayed 延迟多少毫秒
     */
    public static void restartAPP(Context context, long Delayed){

        /**开启一个新的服务，用来重启本APP*/
        Intent intent1=new Intent(context,killSelfService.class);
        intent1.putExtra("PackageName",context.getPackageName());
        intent1.putExtra("Delayed",Delayed);
        context.startService(intent1);

        /**杀死整个进程**/
        android.os.Process.killProcess(android.os.Process.myPid());
    }
    /***重启整个APP*/
    public static void restartAPP(Context context){
        restartAPP(context,2000);
    }
}

（2）killSelfService.java

public class killSelfService extends Service {
    /**关闭应用后多久重新启动*/
    private static  long stopDelayed=50;
    private Handler handler;
    private String PackageName;
    public killSelfService() {
        handler=new Handler();
    }

    @Override
    public int onStartCommand(final Intent intent, int flags, int startId) {
        stopDelayed=intent.getLongExtra("Delayed",50);
        PackageName=intent.getStringExtra("PackageName");
        handler.postDelayed(new Runnable() {
            @Override
            public void run() {
                Intent LaunchIntent = getPackageManager().getLaunchIntentForPackage(PackageName);
                startActivity(LaunchIntent);
                killSelfService.this.stopSelf();
            }
        },stopDelayed);
        return super.onStartCommand(intent, flags, startId);
    }


    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }

}

（3）需要在AndroidManifest.xml中注册Service

<service
            android:process=":restart"
            android:name="com.example.administrator.myapplication.killSelfService" />

（4）在需要的地方调用即可

RestartAPPTool.restartAPP(getApplicationContext(),100);