Question

我有一个奇怪的问题，我不知道如何解决它。我想从我正在运行的服务获得连接。我用方法创建这个内部类：

 public class PlayMusicServiceBinder extends Binder{
    public PlayMusicService getService(){
        return PlayMusicService.this;
    }
}

然后我开始服务并与它建立连接：

 private PlayMusicService pms

startService(playServiceIntent.putExtra("songs", songs).putExtra("currentPosition", currentPosition).putExtra("path", path));
     serviceConnection = new ServiceConnection() {
        @Override
        public void onServiceConnected(ComponentName name, IBinder service) {
            pms = ((PlayMusicService.PlayMusicServiceBinder)service).getService();
        }

        @Override
        public void onServiceDisconnected(ComponentName name) {
            pms = null;
        }
    };

    onBind();

onBind（）：

public void onBind(){
   this.bindService(new Intent(this, PlayMusicService.class),serviceConnection, Context.BIND_AUTO_CREATE);
}

编译器在这一行pms = ((PlayMusicService.PlayMusicServiceBinder)service).getService();上说：“无法投射”

我已经看到很多例子都是这样做的，没有人抱怨这些错误

请帮帮我。

感谢。

Answer 1

您是否在PlayMusicService类中添加了此代码？

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

@Override
public boolean onUnbind(Intent intent) {

    return super.onUnbind(intent);
}

private final IBinder mBinder = new PlayMusicServiceBinder();

无法投入服务

1 个答案: