Android录音及播放功能实现

【Main.java】

package net.blogjava.mobile.record;import java.io.File;import android.app.Activity;import android.media.MediaPlayer;import android.media.MediaRecorder;import android.media.MediaPlayer.OnCompletionListener;import android.os.Bundle;import android.util.Log;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.Toast;public class Main extends Activity implements OnClickListener {private MediaPlayer mediaPlayer;private MediaRecorder mediaRecorder = new MediaRecorder();private File audioFile;@Overridepublic void onClick(View view) {try {String msg = "";switch (view.getId()) {case R.id.btnStart:mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT);mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);audioFile = File.createTempFile("record_", ".wav");Log.d("Main", audioFile.getAbsolutePath());mediaRecorder.setOutputFile(audioFile.getAbsolutePath());mediaRecorder.prepare();mediaRecorder.start();msg = "正在录音...";break;case R.id.btnStop:if (audioFile != null) {mediaRecorder.stop();}msg = "已经停止录音.";break;case R.id.btnPlay:if (audioFile != null) {mediaPlayer = new MediaPlayer();mediaPlayer.setDataSource(audioFile.getAbsolutePath());mediaPlayer.prepare();mediaPlayer.start();mediaPlayer.setOnCompletionListener(new OnCompletionListener() {@Overridepublic void onCompletion(MediaPlayer mp) {setTitle("录音播放完毕.");}});msg = "正在播放录音...";}break;}setTitle(msg);Toast.makeText(this, msg, Toast.LENGTH_LONG).show();} catch (Exception e) {setTitle(e.getMessage());}}@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);Button btnStart = (Button) findViewById(R.id.btnStart);Button btnStop = (Button) findViewById(R.id.btnStop);Button btnPlay = (Button) findViewById(R.id.btnPlay);btnStart.setOnClickListener(this);btnStop.setOnClickListener(this);btnPlay.setOnClickListener(this);}}

【main.xml】

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="horizontal" >    <Button        android:id="@+id/btnStart"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="录音" />    <Button        android:id="@+id/btnStop"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="停止" />    <Button        android:id="@+id/btnPlay"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="播放" /></LinearLayout>

【注意清单文件别忘记加权限】

<uses-permission android:name="android.permission.RECORD_AUDIO" />

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