MediaPlayer播放assert目录下的音频文件

来源：互联网发布：云计算校园招聘编辑：程序博客网时间：2024/06/05 08:05

public class SeekBarActivity extends Activity implements OnClickListener,OnPreparedListener {private TextView txt;MediaPlayer mediaPlayer;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.seekbar);txt = (TextView) findViewById(R.id.txt);txt.setOnClickListener(this);mediaPlayer = new MediaPlayer();}@Overridepublic void onClick(View view) {AssetFileDescriptor descriptor = null;try {descriptor = getAssets().openFd("cat.mp3");} catch (IOException e) {e.printStackTrace();}try {if (mediaPlayer != null) {mediaPlayer.stop();}mediaPlayer.setDataSource(descriptor.getFileDescriptor(),descriptor.getStartOffset(), descriptor.getLength());descriptor.close();mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);mediaPlayer.setOnPreparedListener(this);mediaPlayer.prepareAsync();} catch (Exception e) {e.printStackTrace();}}@Overridepublic void onPrepared(MediaPlayer player) {mediaPlayer.start();}@Overrideprotected void onDestroy() {super.onDestroy();if (mediaPlayer != null) {mediaPlayer.stop();mediaPlayer.release();}}}

但是写成如下形式，使用Uri做路径的方法不行：

String path = "file://android_assert/" + "cat.mp3";Uri uri = Uri.parse(path);

@Overridepublic void onClick(View view) {String path = "file://android_assert/" + "cat.mp3";Uri uri = Uri.parse(path);try {if (mediaPlayer != null) {mediaPlayer.stop();}mediaPlayer.setDataSource(this, uri);mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);mediaPlayer.setOnPreparedListener(this);mediaPlayer.prepareAsync();} catch (Exception e) {e.printStackTrace();}}

写成如下的sdcard中的绝对路径的形式有可以的。

@Overridepublic void onClick(View view) {String path = "/mnt/sdcard/" + "cat.mp3";Uri uri = Uri.parse(path);try {if (mediaPlayer != null) {mediaPlayer.stop();}mediaPlayer.setDataSource(this, uri);mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);mediaPlayer.setOnPreparedListener(this);mediaPlayer.prepareAsync();} catch (Exception e) {e.printStackTrace();}}

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