java-MediaPlayer是否可以播放一个音频文件,完成后可以播放另一个音频文件？

我希望MediaPlayer接受songTitles的数组列表,并检查传入的歌曲名称,然后播放该歌曲.完成后,我希望它转到循环中的下一个歌曲标题并播放该歌曲.但是,我的代码只播放最后一首歌.

public void play(Context c, ArrayList<String> songTitles) {
    stop();

    for (String song: songTitles){
        if (song.equalsIgnoreCase("shakeItOff")){
            mSongPlayer = MediaPlayer.create(c, R.raw.shaketoff);

        } else if (song.equalsIgnoreCase("dropItLow")){
            mSongPlayer = MediaPlayer.create(c, R.raw.dropitlow);

        } else if (song.equalsIgnoreCase("chachaslide")){
            mSongPlayer = MediaPlayer.create(c, R.raw.chachaslide);
        }

        mSongPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
            @Override
            public void onPrepared(MediaPlayer mp) {
                if (mp == mSongPlayer) {
                    mSongPlayer.start();
                }
            }
        });

        mSongPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
            @Override
            public void onCompletion(MediaPlayer mp) {
                stop();
            }
        });


    }
}

解决方法:

您需要使用MediaPlayer.OnCompletionListener在上一个曲目结束时开始新的曲目,因此您可以执行类似以下的操作(我尚未编译它,因此可能存在一些语法错误)：

public void play(final Context c, ArrayList<String> songTitles) {
    stop();
    if (songTitles != null && songTitles.size > 0) {
        final List<String> playList = new ArrayList<String>(songTitles);

        String song = playList.get(0);
        playList.remove(0);

        mSongPlayer = MediaPlayer.create(c, getSongResourceId(song));

        mSongPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
            @Override
            public void onPrepared(MediaPlayer mp) {
                if (mp == mSongPlayer) {
                    mSongPlayer.start();
                }
            }
        });

        mSongPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
            @Override
            public void onCompletion(MediaPlayer mp) {
                stop();
                // Recursively call the play() method with one less
                // track in the list.
                play(c, playList);
            }
        });
    } 
} 

public int getSongResourceId(String songTitle) {
    if (song.equalsIgnoreCase("shakeItOff")){
        return R.raw.shaketoff;
    } else if (song.equalsIgnoreCase("dropItLow")){
        return R.raw.dropitlow;
    } else if (song.equalsIgnoreCase("chachaslide")){
        return R.raw.chachaslide;
    }
}

第一次播放时,它将播放列表中的第一首曲目,然后在MediaPlayer.OnCompletionListener中,它递归地调用play()方法,并从列表中删除第一首曲目.这意味着每次调用play()时,列表都会变短,直到到达列表末尾.

标签：android-mediaplayer,audio,java,android
来源： https://codeday.me/bug/20191120/2040664.html