android 采集音频播放,android开发中语音采集为一个文件及播放MediaRecorder，MediaPlayer...

package com.androidbook.multimedia;

import android.app.Activity;

import android.content.ContentValues;

import android.content.Intent;

import android.media.MediaPlayer;

import android.media.MediaRecorder;

import android.media.RingtoneManager;

import android.net.Uri;

import android.os.Bundle;

import android.provider.MediaStore;

import android.util.Log;

import android.view.View;

import android.widget.Button;

public class Audio extends Activity {

final private static String RECORDED_FILE = "/audio.mp4";

MediaRecorder audioListener;

MediaPlayer player;

@Override

protected void onPause() {

if (audioListener != null) {

audioListener.release();

audioListener = null;

}

if (player != null) {

player.release();

player = null;

}

super.onPause();

}

@Override

protected void onResume() {

super.onResume();

audioListener = new MediaRecorder();

player = new MediaPlayer();

}

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.audio);

final Button record = (Button) findViewById(R.id.record);

final Button stop = (Button) findViewById(R.id.stop);

final Button stopPlayback = (Button) findViewById(R.id.stop_playback);

final Button play = (Button) findViewById(R.id.play);

// 语音采集

record.setOnClickListener(new View.OnClickListener() {

public void onClick(View v) {

if (audioListener == null) {

audioListener = new MediaRecorder();

}

// Fully qualified path name. In this case, we use the Files

// subdir

String pathForAppFiles = getFilesDir().getAbsolutePath();

pathForAppFiles += RECORDED_FILE;

Log.d("Audio filename:", pathForAppFiles);

audioListener.setAudioSource(MediaRecorder.AudioSource.MIC);

audioListener

.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);

audioListener

.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);

audioListener.setOutputFile(pathForAppFiles);

try {

audioListener.prepare();

audioListener.start();

} catch (Exception e) {

Log.e("Audio",

"Failed to prepare and start audio recording", e);

}

stop.setVisibility(View.VISIBLE);

record.setVisibility(View.GONE);

play.setVisibility(View.GONE);

}

});

// 语音采集停止

stop.setOnClickListener(new View.OnClickListener() {

public void onClick(View v) {

if (audioListener == null)

return;

audioListener.stop();

audioListener.release();

audioListener = null;

String pathForAppFiles = getFilesDir().getAbsolutePath();

pathForAppFiles += RECORDED_FILE;

Log.d("Audio filename:", pathForAppFiles);

ContentValues values = new ContentValues(10);

values.put(MediaStore.MediaColumns.TITLE, "RecordedAudio");

values.put(MediaStore.Audio.Media.ALBUM,

"Your Groundbreaking Album");

values.put(MediaStore.Audio.Media.ARTIST, "Your Name");

values.put(MediaStore.Audio.Media.DISPLAY_NAME,

"The Audio File You Recorded In Media App");

values.put(MediaStore.Audio.Media.IS_RINGTONE, 1);

values.put(MediaStore.Audio.Media.IS_MUSIC, 1);

values.put(MediaStore.MediaColumns.TITLE, "RecordedAudio");

values.put(MediaStore.MediaColumns.DATE_ADDED,

System.currentTimeMillis() / 1000);

values.put(MediaStore.MediaColumns.MIME_TYPE, "audio/mp4");

values.put(MediaStore.Audio.Media.DATA, pathForAppFiles);

Uri audioUri = getContentResolver().insert(

MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, values);

if (audioUri == null) {

Log.d("Audio", "Content resolver failed");

return;

}

// Force Media scanner to refresh now. Technically, this is

// unnecessary, as the media scanner will run periodically but

// helpful for testing.

Log.d("Audio URI", "Path = " + audioUri.getPath());

sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE,

audioUri));

RingtoneManager.setActualDefaultRingtoneUri(

getApplicationContext(), RingtoneManager.TYPE_RINGTONE,

audioUri);

stop.setVisibility(View.GONE);

record.setVisibility(View.VISIBLE);

play.setVisibility(View.VISIBLE);

}

});

// 语音播放

play.setOnClickListener(new View.OnClickListener() {

public void onClick(View v) {

if (player == null) {

player = new MediaPlayer();

}

try {

// Fully qualified path name. In this case, we use the Files

// subdir

String audioFilePath = getFilesDir().getAbsolutePath();

audioFilePath += RECORDED_FILE;

Log.d("Audio filename:", audioFilePath);

player.setDataSource(audioFilePath);

player.prepare();

player.start();

} catch (Exception e) {

Log.e("Audio", "Playback failed.", e);

}

stopPlayback.setVisibility(View.VISIBLE);

record.setVisibility(View.GONE);

play.setVisibility(View.GONE);

}

});

stopPlayback.setOnClickListener(new View.OnClickListener() {

public void onClick(View v) {

if (player == null)

return;

player.stop();

player.release();

player = null;

stopPlayback.setVisibility(View.GONE);

record.setVisibility(View.VISIBLE);

play.setVisibility(View.VISIBLE);

}

});

}

}