使用MediaRecorder录制音频

Android中提供了MediaRecorder类来录制音频，过程很简单，只需按步骤执行即可：

下面用一个简单实例来演示MediaRecorder的使用：

Activity:

package com.home.activity;import java.io.File;import com.home.testrecord.R;import android.app.Activity;import android.media.MediaRecorder;import android.os.Bundle;import android.os.Environment;import android.view.View;import android.view.View.OnClickListener;import android.widget.Toast;import android.widget.ToggleButton;public class TestRecordActivity extends Activity implements OnClickListener {private ToggleButton recordBtn;private MediaRecorder mediaRecorder;// 系统的音频文件private File soundFile;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);recordBtn = (ToggleButton) findViewById(R.id.main_toggleButton);recordBtn.setOnClickListener(this);}@Overridepublic void onClick(View v) {if (recordBtn.isChecked()) {if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {Toast.makeText(this, "SD卡不存在，请插入SD卡！", Toast.LENGTH_LONG).show();return;}// 创建保存录音的音频文件soundFile = new File(Environment.getExternalStorageDirectory()+ "/mysound.amr");// 创建录制音频的对象mediaRecorder = new MediaRecorder();// 设置录音的声音来源，一般来自于麦克风mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);// 设置录制的声音输出格式（必须在设置声音编码格式之前设置）mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);// 设置声音编码格式mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);// 设置声音的输出路径mediaRecorder.setOutputFile(soundFile.getAbsolutePath());// 准备录音try {mediaRecorder.prepare();// 开始录音mediaRecorder.start();} catch (Exception e) {e.printStackTrace();}} else {if (soundFile != null && soundFile.exists()) {// 停止录制mediaRecorder.stop();// 释放资源mediaRecorder.release();mediaRecorder = null;}}}@Overrideprotected void onDestroy() {super.onDestroy();if (soundFile != null && soundFile.exists()) {// 停止录制mediaRecorder.stop();// 释放资源mediaRecorder.release();mediaRecorder = null;}}}

注意需要加上相应权限：

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

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