[英]android java playing wav audio file from sd card
I`ve troubles to play a wav audio file from sd card: 我很难从SD卡播放WAV音频文件:
This is my code: 这是我的代码:
mp = new MediaPlayer(); //Defined as MediaPlayer above
try {
mp.setDataSource(fileNamePath);
mp.prepare();
mp.start();
} catch (IOException e) {
e.printStackTrace();
}
The fileNamePath is in this format: /storage/emulated/0/MyApp/name.wav fileNamePath的格式为:/storage/emulated/0/MyApp/name.wav
This is the error code I get: 这是我得到的错误代码:
E/MediaPlayer: stop called in state 1, mPlayer(0x0)
E/MediaPlayer: error (-38, 0)
E/MediaPlayer: Error (-38,0)
I hope you can help me here? 我希望你能在这里帮助我吗?
Thanks! 谢谢!
Android media player have some troubles with some wav files, I recommend you to use AudioTrack instead of MediaPlayer. Android媒体播放器在处理某些wav文件时会遇到一些麻烦,建议您使用AudioTrack代替MediaPlayer。
Here is a example: 这是一个例子:
new Thread(new Runnable() {
@Override
public void run() {
try {
// just put here your wav file
File yourWavFile = new File(Environment.getExternalStorageDirectory() + "/" + AUDIO_FOLDER, fileName);
FileInputStream fis = new FileInputStream(yourWavFile);
int minBufferSize = AudioTrack.getMinBufferSize(16_000,
AudioFormat.CHANNEL_OUT_MONO, AudioFormat.ENCODING_PCM_16BIT);
AudioTrack at = new AudioTrack(AudioManager.STREAM_MUSIC, 16_000,
AudioFormat.CHANNEL_OUT_MONO, AudioFormat.ENCODING_PCM_16BIT,
minBufferSize, AudioTrack.MODE_STREAM);
int i = 0;
byte[] music = null;
try {
music = new byte[512];
at.play();
while ((i = fis.read(music)) != -1)
at.write(music, 0, i);
} catch (IOException e) {
e.printStackTrace();
}
at.stop();
at.release();
} catch (IOException ex) {
ex.printStackTrace();
}
}
}).start();
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