Android 音频在安卓系统中显然不起作用

我尝试根据用户选择从原始文件夹播放音频文件，但如果用户选择或更改两个或多个文件，则音频工作不正常，但在更改选项后，它会将选定文件和以前选定的文件流式传输。我是android新手…我已经在下面发布了我的代码，有人帮我解决这个问题吗

switch (Global.id)
{
case R.id.radioButton1:
    mMediaPlayer = MediaPlayer.create(context, R.raw.kalimba);
    mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
    mMediaPlayer.setLooping(true);
    mMediaPlayer.start();
    break;

case R.id.radioButton2:
    mMediaPlayer = MediaPlayer.create(context, R.raw.maid);
    mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
    mMediaPlayer.setLooping(true);
    mMediaPlayer.start();
    break;

case R.id.radioButton3:
    mMediaPlayer = MediaPlayer.create(context, R.raw.sleep_away);
    mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
    mMediaPlayer.setLooping(true);
    mMediaPlayer.start();
    break;
}

这里有一个onDestroy方法

private void destroy()
{
mMediaPlayer.release();
mMediaPlayer.reset();
mMediaPlayer.stop();            
}

这样试试看

if ( mMediaPlayer.isPlaying() )  // Checking if already playing any song
{
     mMediaPlayer.reset();
     mMediaPlayer.stop();

}

在开关箱中添加上述条件

switch (Global.id)
{
case R.id.radioButton1:
    mMediaPlayer = MediaPlayer.create(context, R.raw.kalimba);
    mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
    mMediaPlayer.setLooping(true);

    if ( mMediaPlayer.isPlaying() )  // Checking if already playing any song
    {
        mMediaPlayer.reset();
        mMediaPlayer.stop();
    }
    mMediaPlayer.start();
    break;
case R.id.radioButton2:
    mMediaPlayer = MediaPlayer.create(context, R.raw.maid);
    mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
    mMediaPlayer.setLooping(true);
    if ( mMediaPlayer.isPlaying() )  // Checking if already playing any song
    {
        mMediaPlayer.reset();
        mMediaPlayer.stop();
    }
    mMediaPlayer.start();
    break;
case R.id.radioButton3:
    mMediaPlayer = MediaPlayer.create(context, R.raw.sleep_away);
    mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
    mMediaPlayer.setLooping(true);
    if ( mMediaPlayer.isPlaying() )  // Checking if already playing any song
    {
        mMediaPlayer.reset();
        mMediaPlayer.stop();
    }
    mMediaPlayer.start();
    break;
}

---

你需要重置你的播放器。这样做：

//global
mMediaPlayer = new MediaPlayer();
mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
mMediaPlayer.setLooping(true);

//switch statement somewhere else
switch (Global.id)
{
case R.id.radioButton1:
    otherSong(R.raw.kalimba);
    break;

case R.id.radioButton2:
    otherSong(R.raw.maid);
    break;

case R.id.radioButton3:
    otherSong(R.raw.sleep_away);
    break;
}

//method for changing song
private void otherSong(int song) {
    if(mMediaPlayer.isPlaying()) {          
            mMediaPlayer.stop();
    }
    mMediaPlayer.reset();
    mMediaPlayer.setDataSource(song);
    mMediaPlayer.prepare();
    mMediaPlayer.start();
}

提醒：调用reset（）将使媒体播放器处于空闲状态，因此无需调用stop

编辑：所以应该是这样的

switch (Global.id)
{
case R.id.radioButton1:
      if ( mMediaPlayer.isPlaying() )  // Checking if already playing any song
    {
        mMediaPlayer.reset();
       // mMediaPlayer.stop();
    }
    mMediaPlayer = MediaPlayer.create(context, R.raw.kalimba);
    mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
    mMediaPlayer.setLooping(true);


    mMediaPlayer.start();
    break;
case R.id.radioButton2:
       if ( mMediaPlayer.isPlaying() )  // Checking if already playing any song
    {
        mMediaPlayer.reset();
       // mMediaPlayer.stop();
    }
    mMediaPlayer = MediaPlayer.create(context, R.raw.maid);
    mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
    mMediaPlayer.setLooping(true);

    mMediaPlayer.start();
    break;
case R.id.radioButton3:
    if ( mMediaPlayer.isPlaying() )  // Checking if already playing any song
    {
        mMediaPlayer.reset();
       // mMediaPlayer.stop();
    }
    mMediaPlayer = MediaPlayer.create(context, R.raw.sleep_away);
    mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
    mMediaPlayer.setLooping(true);

    mMediaPlayer.start();
    break;
}

不需要打电话给prepare至少根据我的经验，我打电话给prepare后遇到了一些麻烦

---

编辑：我建议您在创建图层之前检查它是否播放。

@Somasundaram好的，我正在等待。

switch (Global.id)
{
case R.id.radioButton1:
      if ( mMediaPlayer.isPlaying() )  // Checking if already playing any song
    {
        mMediaPlayer.reset();
       // mMediaPlayer.stop();
    }
    mMediaPlayer = MediaPlayer.create(context, R.raw.kalimba);
    mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
    mMediaPlayer.setLooping(true);


    mMediaPlayer.start();
    break;
case R.id.radioButton2:
       if ( mMediaPlayer.isPlaying() )  // Checking if already playing any song
    {
        mMediaPlayer.reset();
       // mMediaPlayer.stop();
    }
    mMediaPlayer = MediaPlayer.create(context, R.raw.maid);
    mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
    mMediaPlayer.setLooping(true);

    mMediaPlayer.start();
    break;
case R.id.radioButton3:
    if ( mMediaPlayer.isPlaying() )  // Checking if already playing any song
    {
        mMediaPlayer.reset();
       // mMediaPlayer.stop();
    }
    mMediaPlayer = MediaPlayer.create(context, R.raw.sleep_away);
    mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
    mMediaPlayer.setLooping(true);

    mMediaPlayer.start();
    break;
}