Android Fragments 和 TelephonyManager

Question

我有一个问题，我正在使用一个扩展 Fragments 的类来通过 MusicPlayer 播放音乐，在这个类中，如果有来电，它使用 PhoneStateListener 和 TelephonyManager 来暂停音乐，一切正常，怀疑是当我启动应用程序，歌曲自动开始，想避免这种情况，有什么建议吗？？这是我的代码的一部分：

PS：对不起我的英语不好

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

它是由这个块中的代码开始的吗？

        } 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，您可能只需要一个标志，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：

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