安卓片段和TelephonyManager

Question

我有一个问题，我正在使用一个通过MusicPlayer扩展片段来播放音乐的类，在这个类中使用PhoneStateListener和TelephonyManager来暂停音乐，如果有电话进来，一切都好，怀疑当我启动应用程序时，歌曲会自动开始，希望避免这种情况，有什么建议吗?？下面是我的代码的一部分：

附言:很抱歉我的英语不好

public class FragmentPlaySong extends Fragment implements MediaPlayer.OnCompletionListener {

private MediaPlayer mediaPlayer;
...

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment_play_song, container, false);

    mediaPlayer = new MediaPlayer();
    mediaPlayer.setOnCompletionListener(this);
    ...
    ...

    //Service MediaPlayer pause when Incoming Call
    PhoneStateListener phoneStateListener = new PhoneStateListener(){
        public void onCallStateChanged(int state, String incomingNumber){
            if (state == TelephonyManager.CALL_STATE_RINGING) {
                if (mediaPlayer != null){
                    if (mediaPlayer.isPlaying()){
                        mediaPlayer.pause();
                    }
                }
            } else if(state == TelephonyManager.CALL_STATE_IDLE) { //here start song when start application
                if (mediaPlayer != null){
                    if (!mediaPlayer.isPlaying()){
                        mediaPlayer.start();
                    }
                }
            } else if(state == TelephonyManager.CALL_STATE_OFFHOOK) {
                if (mediaPlayer != null){
                    if (mediaPlayer.isPlaying()){
                        mediaPlayer.pause();
                    }
                }
            }
            super.onCallStateChanged(state, incomingNumber);
        }
    };

    TelephonyManager mgr = (TelephonyManager) getActivity().getSystemService(Context.TELEPHONY_SERVICE);
    if (mgr != null){
        mgr.listen(phoneStateListener,PhoneStateListener.LISTEN_CALL_STATE);
    }

    return view;
}

Answer 1

它是由这个代码块中的代码启动的吗？

        } else if(state == TelephonyManager.CALL_STATE_IDLE) { //here start song when start application
            if (mediaPlayer != null){
                if (!mediaPlayer.isPlaying()){
                    mediaPlayer.start();
                }
            }
        }

如果是这样，你可能只需要有一个标志，例如

private boolean mPlaying;

当用户手动启动音乐时，将其设置为true，然后将上面的块更改为如下所示：

        } else if(state == TelephonyManager.CALL_STATE_IDLE) { //here start song when start application
            if (mediaPlayer != null){
                if (mPlaying && !mediaPlayer.isPlaying()){
                    mediaPlayer.start();
                }
            }
        }