java android怎么播放.amr

在 Android 平台上播放 .amr 格式的音频文件有以下几种常见的方法:

1. 使用 MediaPlayer 类:

```java

MediaPlayer mediaPlayer = new MediaPlayer();

mediaPlayer.setDataSource("path/to/your/file.amr");

mediaPlayer.prepare();

mediaPlayer.start();

```

2. 使用 AudioTrack 类:

```java

try {

FileInputStream fis = new FileInputStream("path/to/your/file.amr");

byte[] audioData = new byte[fis.available()];

fis.read(audioData);

fis.close();

AudioTrack audioTrack = new AudioTrack(AudioManager.STREAM_MUSIC,

44100, // sample rate

AudioFormat.CHANNEL_OUT_MONO,

AudioFormat.ENCODING_PCM_16BIT,

audioData.length,

AudioTrack.MODE_STATIC);

audioTrack.write(audioData, 0, audioData.length);

audioTrack.play();

} catch (IOException e) {

e.printStackTrace();

}

```

3. 使用第三方库, 如 ffmpeg 或 ExoPlayer:

```gradle

dependencies {

implementation 'com.google.android.exoplayer:exoplayer:2.X.X'

}

```

```java

ExoPlayer player = new ExoPlayer.Builder(context).build();

MediaSource mediaSource = new ProgressiveMediaSource.Factory(dataSourceFactory)

.createMediaSource(Uri.fromFile(new File("path/to/your/file.amr")));

player.setMediaSource(mediaSource);

player.prepare();

player.play();

```

无论使用哪种方式,请确保在使用完音频资源后,及时释放相关资源,以避免内存泄漏。