Question

我录制了音频，并通过媒体播放器播放。录音，播放工作正常。我在播放录制的声音时使用了搜索栏。我使用以下编码来播放存储在SD卡中的内容。它工作正常.. mFileName是sdcard中的音频文件。在播放时，搜索栏不会移动。任何建议......

      private void startPlaying()
{

 MediaPlayer mPlayer = new MediaPlayer();

    try {
        mPlayer.setDataSource(mFileName);
        mPlayer.prepare();
         mPlayer.start();
        mSeekBar.setMax(mPlayer.getDuration());
    } catch (IOException e) {
        Log.e(LOG_TAG, "prepare() failed");
    }
}

我用过

    mSeekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {

        @Override
        public void onStopTrackingTouch(SeekBar seekBar) {
            // TODO Auto-generated method stub

        }

        @Override
        public void onStartTrackingTouch(SeekBar seekBar) {
            // TODO Auto-generated method stub

        }

        @Override
        public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
            // TODO Auto-generated method stub
            if(fromUser){
                mPlayer.seekTo(progress);
                mSeekBar.setProgress(progress);
            }
        }
    });
    Thread currentThread  = new Thread((Runnable) this);
    currentThread.start();

 public void run() {
    // TODO Auto-generated method stub
    try {
        while(mPlayer != null){
            int currentPosition = mPlayer.getCurrentPosition();
            Message msg = new Message();
            msg.what = currentPosition;
            threadHandler.sendMessage(msg);
        }
        Thread.sleep(100);
    } catch (InterruptedException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}
private Handler threadHandler = new Handler(){
    public void handleMessage(Message msg){

        mSeekBar.setProgress(msg.what);
    }
};

仅当用户移动时，进度条才会移动。它会自动移动。

Answer 1

搜索栏不会神奇地更新自己以显示MediaPlayer的当前位置。这是一个链接，显示如何使用轮询线程来检查MediaPlayer的位置，并相应地更新搜索栏：

http://united-coders.com/nico-heid/an-android-seekbar-for-your-mediaplayer

Seekbar在比赛时不动

1 个答案: