我想使用 ListView 创建一个 Activity ,当单击列表项时它会播放不同的声音效果。我用 MediaPlayer 和 SoundPool 测试了这个功能,两者都工作正常。
我实现了 AudioTrack,但是当我从 ListView 中单击一个项目时,它只会播放噪音或崩溃并显示“无效的音频缓冲区大小”。
这是我的代码。
public class ATSoundAdapter extends ArrayAdapter {
private ArrayList<SoundData> mData;
private Context context;
private AudioTrack at;
public ATSoundAdapter(Context context, ArrayList<SoundData> mData) {
super(context, -1);
this.context = context;
this.mData = mData;
}
public class ViewHolder {
private TextView mSoundNameTv;
private LinearLayout container;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
convertView = LayoutInflater.from(context)
.inflate(R.layout.list_item,
parent, false);
holder = new ViewHolder();
holder.mSoundNameTv = (TextView) convertView.findViewById(R.id.sound_name_tv);
holder.container = (LinearLayout) convertView.findViewById(R.id.container);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
final SoundData currentSound = mData.get(position);
if (currentSound != null) {
holder.mSoundNameTv.setText(currentSound.getSoundName());
holder.container.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
playAudioTrack(currentSound.getSoundResource());
}
});
}
return convertView;
}
private void playAudioTrack(int resource) {
int i = 0;
InputStream inputStream = context.getResources().openRawResource(resource);
long bufferSize = context.getResources().openRawResourceFd(resource).getLength();
byte[] buffer = new byte[(int)bufferSize];
try {
int lengthOfAudioClip = inputStream.read(buffer, 0, buffer.length);
AudioTrack at = new AudioTrack(AudioManager.STREAM_MUSIC,
44100, AudioFormat.CHANNEL_OUT_STEREO,
AudioFormat.ENCODING_PCM_16BIT,
lengthOfAudioClip, AudioTrack.MODE_STATIC);
at.write(buffer, 0, lengthOfAudioClip);
inputStream.close();
at.play();
} catch (IOException e) {
e.printStackTrace();
}
}
@Override
public int getCount() {
return mData.size();
}
}
我以为字节数组大小不对...但是当我在logcat中查看时,它恰好是原始文件的大小。 我是 android 新手,不知道如何使用 AudioTrack。
提前致谢。
最佳答案
你可以改变你的代码
AudioTrack at = new AudioTrack(AudioManager.STREAM_MUSIC, 44100, AudioFormat.CHANNEL_CONFIGURATION_MONO, AudioFormat.ENCODING_PCM_16BIT, lengthOfAudioClip, AudioTrack.MODE_STREAM);
否则你可以检查这个link
关于java - Android:AudioTrack 无法正常工作,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/37836061/