android - 如何在 Android 中以 block 方法停止服务？

Question

1. 我运行代码得到如下结果，但我希望App能够按照“A”->“Service OnDestroy”->“B”->“C”的顺序运行，我怎么能做 ？

2. 在我的方式 2 部分，我尝试将代码放入函数 new Handler().postDelayed(new Runnable() {} 中，它是好的，它按照“A”->“Service OnDestroy”->“B”->“C”的顺序运行，我不知道为什么这个方法可以成功，我不知道这个方法是不是好方法!

结果

11-13 10:04:32.137 27947-27947/info.dodata.screenrecorder E/My:A

11-13 10:04:32.147 27947-27947/info.dodata.screenrecorder E/My:B

11-13 10:04:32.157 27947-27947/info.dodata.screenrecorder E/My:C

11-13 10:04:32.157 27947-27947/info.dodata.screenrecorder E/My:Service OnDestroy

UIAbou.cs

public class UIAbout extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.layout_about);

        Intent intent1 = new Intent(UIAbout.this,bll.RecordService.class);
        startService(intent1);

        Button btnReturn = (Button) findViewById(R.id.btnReturn);
        btnReturn.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                Log.e("My", "A");

                Intent intent1 = new Intent(UIAbout.this,bll.RecordService.class);
                stopService(intent1);

                Log.e("My", "B");

                Toast.makeText(getApplicationContext(), "OK", Toast.LENGTH_LONG).show();

                Log.e("My", "C");
            }
        });

    }

}

RecordService.cs

public class RecordService extends Service {

    private Context mContext;

    @Override
    public IBinder onBind(Intent intent) {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    public void onCreate(){

    }

    @Override
    public void onDestroy(){
        Log.e("My","Service OnDestroy");
        super.onDestroy(); //It seems that the APP is OK if I remove this.
    }


    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
         return super.onStartCommand(intent,flags,startId);
    }


}

=======================我的方式 1 ================== ====================

我设置了一个标记 isServiceStoped 来监控停止服务是否完成，但是我的应用程序在显示结果“11-13 11:31:23.107 7599-7599/info.dodata.screenrecorder E/My:A”后挂断了

新的 UIAbout.cs

public class UIAbout extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.layout_about);

        Intent intent1 = new Intent(UIAbout.this,bll.RecordService.class);
        startService(intent1);

        Button btnReturn = (Button) findViewById(R.id.btnReturn);
        btnReturn.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                Log.e("My", "A");

                Intent intent1 = new Intent(UIAbout.this, bll.RecordService.class);
                stopService(intent1);

                while (RecordService.isServiceStoped==false){
                    //It block 
                }

                Log.e("My", "B");

                Toast.makeText(getApplicationContext(), "OK", Toast.LENGTH_LONG).show();

                Log.e("My", "C");
            }
        });

    }

}

新建 RecordService.cs

public class RecordService extends Service {

   public static boolean isServiceStoped=true;

    @Override
    public IBinder onBind(Intent intent) {
        // TODO Auto-generated method stub
        return null;
    }


    @Override
    public void onCreate(){

    }

    @Override
    public void onDestroy(){
        Log.e("My", "Service OnDestroy");
        isServiceStoped=true;
        super.onDestroy(); //It seems that the APP is OK if I remove this.
    }


    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {

        isServiceStoped=false;
        return super.onStartCommand(intent,flags,startId);
    }


}

=====================我的方式 2================= =========================

我尝试将代码放入函数 new Handler().postDelayed(new Runnable() {} 中，没问题，它按顺序“A”->“Service OnDestroy”运行->"B"->"C",

我不知道为什么这个方法可以成功，我不知道这个方法是不是好方法

最后一个UIAbout.cs

public class UIAbout extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.layout_about);

        Intent intent1 = new Intent(UIAbout.this,bll.RecordService.class);
        startService(intent1);

        Button btnReturn = (Button) findViewById(R.id.btnReturn);
        btnReturn.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                Log.e("My", "A");

                Intent intent1 = new Intent(UIAbout.this, bll.RecordService.class);
                stopService(intent1);

                new Handler().postDelayed(new Runnable() {
                    public void run() {
                        Log.e("My", "B");

                        Toast.makeText(getApplicationContext(), "OK", Toast.LENGTH_LONG).show();

                        Log.e("My", "C");
                    }
                }, 1);


            }
        });

    }

}

最后一个RecordService.cs

public class RecordService extends Service {

    private Context mContext;

    @Override
    public IBinder onBind(Intent intent) {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    public void onCreate(){

    }

    @Override
    public void onDestroy(){
        Log.e("My", "Service OnDestroy");
        super.onDestroy(); //It seems that the APP is OK if I remove this.
    }


    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        return super.onStartCommand(intent,flags,startId);
    }
}

Answer 1

1. 不，您不能同步停止服务。 stopService() 是停止服务的请求。它会在一段时间后尽快停止。

2. 不，您不能从 onDestroy() 方法中删除 super.onDestroy() 并且仍然让它正常工作。