Question

我是Android知识的新手，希望您能为我提供帮助。我尝试制作一些音乐应用程序。

应用程序必须执行以下操作：

当用户按下播放按钮时，一个音频文件（称为“ mainFile”）必须循环播放。
播放“ mainFile”并且用户按下fillin按钮时，另一个音频文件称为“ fillinFile”，必须在最后一个循环结束后立即开始。

因此，我使用了Not able to achieve Gapless audio looping so far on Android中的“ LoopMediaPlayer” 其实效果很好。

我的问题：如果我按下fillin按钮，则该应用会在“ fillinFile”开始播放之前循环两次“ mainFile”。

这是我的代码：

public class SoundsFragment extends Fragment implements View.OnClickListener {

    public static String TAG = "PLAYER";
    private XButton fillIn;
    private XButton stop;
    private XButton play;
    private LoopMediaPlayer mediaPlayerMain;
    private LoopMediaPlayer mediaPlayerFillIn;
    private Taal playingTaal;

    View view;

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

        bindButtons();
        return view;
    }


    @Override
    public void onClick(View v) {
        //stop();
        XButton button = (XButton) v;
        switch (button.getId()) {
            case R.id.fillin:
                playFillIn();
                break;
            case R.id.play:
                playMain();
                break;
            default:
        }
    }

    private void playMain() {
        mediaPlayerMain = LoopMediaPlayer.create(getContext(), R.raw.d_vb_01, R.raw.d_vb_01_var);

    }

    private void playFillIn() {
        mediaPlayerMain.setStartedFollowers(true);
    }


    private void bindButtons() {
        fillIn = (XButton) view.findViewById(R.id.fillin);
        stop = (XButton) view.findViewById(R.id.stop);
        play = (XButton) view.findViewById(R.id.play);
        fillIn.setOnClickListener(this);
        stop.setOnClickListener(this);
        play.setOnClickListener(this);
    }

}

public class LoopMediaPlayer {

    public static final String TAG = LoopMediaPlayer.class.getSimpleName();

    private Context mContext = null;

    private int mFollowersResId= 0;

    private int mCounter = 1;

    private MediaPlayer mCurrentPlayer = null;
    private MediaPlayer mNextPlayer = null;

    private boolean mStartedFollowers = false;
    private boolean mStartedMain = false;
    private int mResId = 0;


    public static LoopMediaPlayer create(Context context, int mainResId, int followersResId) {
        return new LoopMediaPlayer(context, mainResId, followersResId);
    }

    private LoopMediaPlayer(Context context, int mainResId, int followersResId) {

        mContext = context;
        mResId = mainResId;

        mFollowersResId = followersResId;

        mCurrentPlayer = MediaPlayer.create(mContext, mResId);

        mCurrentPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
            @Override
            public void onPrepared(MediaPlayer mediaPlayer) {
                mCurrentPlayer.start();
            }
        });

        createNextMediaPlayer(mResId);
    }

    private void createNextMediaPlayer(int id) {
        mNextPlayer = MediaPlayer.create(mContext, id);
        mCurrentPlayer.setNextMediaPlayer(mNextPlayer);
        mCurrentPlayer.setOnCompletionListener(onCompletionListener);
    }

    private MediaPlayer.OnCompletionListener onCompletionListener = new MediaPlayer.OnCompletionListener() {
        @Override
        public void onCompletion(MediaPlayer mediaPlayer) {

            if(mStartedFollowers){
                mResId = mFollowersResId;
            }

            mCurrentPlayer = mNextPlayer;
            createNextMediaPlayer(mResId);
            mediaPlayer.release();

        }
    };

    public void setStartedFollowers(boolean started){

        mStartedFollowers = started;

    }

}

Answer 1

尝试通过在私有LoopMediaPlayer（）构造函数中删除此createNextMediaPlayer(mResId);

Android音乐应用

1 个答案: