android - bindservice 执行ondestroy后有没有被销毁

问题描述

问 题

在mainActivity中我调用了unbindservice，并且在log中看到执行了bindservice的oddestroy函数，这样应该是销毁了service，但是我在mainActivity中再调用binder.getthis还能输出bindservice的this.tostring。这又表明service还存在
这是怎么回事

这是bindservice的定义

public class BindService extends Service {
    private int count=0;
    private boolean quit=false;
    private String LOG_TAG="--BindService--";
    private MyBinder binder=new MyBinder();


    public class  MyBinder extends Binder{
        public int getCount()
        {
            return count;
        }
        public boolean getQuit()
        {
            return quit;
        }
        public String getthis()
        {
            return test();
        }
    }
    @Override
    public IBinder onBind(Intent intent)//?这里的intent 有什么用
    {
        Log.w(LOG_TAG,"onBind");
        return  binder;
    }
    @Override
    public  void onCreate()
    {
        super.onCreate();
        Log.w(LOG_TAG,"on Created");
        new Thread(){
            @Override
            public void run()
            {
                while (!quit)
                {
                    try {
                        Thread.sleep(1000);
                    }catch (InterruptedException e)
                    {}
                    count ++;
                }
            }
        }.start();
    }
    @Override
    public boolean onUnbind(Intent intent)
    {
        this.quit=true;
        Log.w(LOG_TAG,"Unbind");
        return  true;
    }

    @Override
    public  void  onDestroy()
    {
        super.onDestroy();
        Log.w(LOG_TAG,"Destroy");
        this.quit=true;
    }
    public String test(){
        return this.toString();
    }


}

activity 代码：

public class BindServiceActivity extends AppCompatActivity {
    private String LOG_TAG="--connection--";
    BindService.MyBinder binder;
    Intent intent;
    myConn conn=new myConn();

    class myConn implements ServiceConnection {
        private boolean actived=false;
        @Override
        public void onServiceConnected(ComponentName name, IBinder service) {
            actived=true;
            Log.w(LOG_TAG,"Connected");
            binder=(BindService.MyBinder)service;
        }
        @Override
        public void onServiceDisconnected(ComponentName name)
        {
            actived=false;
            Log.w(LOG_TAG,"Disconnected");
        }
        public boolean isActived()
        {
            return actived;
        }
    }

    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.bindservice);
        intent=new Intent(this,BindService.class);
    }
    public void myBind(View view)
    {
        Log.w(LOG_TAG,"bind clicked");
        bindService(intent,conn, Service.BIND_AUTO_CREATE);
    }
    public  void myUnBind(View view)
    {
      //  Log.w(LOG_TAG,binder.toString());
        if(conn.isActived())
        {
            if (!binder.getQuit())
            {
                //这里仅仅是解除conn 与 service 之间的关系，binder 并没有被销毁，因此还能调用getcount
                unbindService(conn);
            } else
            {
                Toast.makeText(this, "Conn is already disconnected", Toast.LENGTH_SHORT).show();
            }
        }else
        {
            Toast.makeText(this, "Conn ia not connected", Toast.LENGTH_SHORT).show();
        }
    }
    public void myShowStatus(View view) {
        if (conn.isActived()) {
            Log.w(LOG_TAG,binder.getthis());
            TextView txt=(TextView)findViewById(R.id.txt);
            txt.setText("Count of service is:" + binder.getCount());
            //Toast.makeText(this, "Count of service is:" + binder.getCount(), Toast.LENGTH_SHORT).show();
        }else {
            Toast.makeText(this, "Conn ia not connected", Toast.LENGTH_SHORT).show();
        }
    }
    public void myBack(View s)
    {
        finish();
    }
}

解决方案

你BindService的内部类MyBinder持有了外部类BindService的实例

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