Android(安卓)录制音频示例

1）布局文件

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    ><Button     android:layout_width="fill_parent"     android:layout_height="wrap_content"     android:id="@+id/start_record"   android:text="Start Audio Recording"    /><Button      android:layout_width="fill_parent"     android:layout_height="wrap_content"    android:id="@+id/stop_record"    android:text="Stop Audio Recording"    /></LinearLayout>

2）AudioRecordActivity.java

import java.io.File;import java.io.IOException;import android.app.Activity;import android.content.ContentValues;import android.content.Intent;import android.media.MediaRecorder;import android.net.Uri;import android.os.Bundle;import android.os.Environment;import android.provider.MediaStore;import android.util.Log;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;public class AudioRecordActivity extends Activity {public static final String TAG = AudioRecordActivity.class.getSimpleName();private MediaRecorder mediaRecord = null;private Button btnStart, btnStop;private File storeFile = null;private MyOnClickListener listener = null;private static final int TAG_START = 0;private static final int TAG_STOP = 1;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.audio_record);mediaRecord = new MediaRecorder();listener = new MyOnClickListener();btnStart = (Button)findViewById(R.id.start_record);btnStart.setTag(TAG_START);btnStart.setOnClickListener(listener);btnStop = (Button)findViewById(R.id.stop_record);btnStop.setTag(TAG_STOP);btnStop.setOnClickListener(listener);btnStart.setEnabled(true);btnStop.setEnabled(false);}private void onStartRecord() {btnStart.setEnabled(false);btnStop.setEnabled(true);btnStop.requestFocus();try {startRecord();} catch (IllegalStateException e) {Log.e(TAG, e.toString());} catch (IOException e) {Log.e(TAG, e.toString());}}private void startRecord() throws IllegalStateException, IOException {mediaRecord.setAudioSource(MediaRecorder.AudioSource.MIC);//设置音频源mediaRecord.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);//设置音频输出格式mediaRecord.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);//设置音频编码if(storeFile == null){File sampleDir = Environment.getExternalStorageDirectory();try {storeFile = File.createTempFile("freedom", ".3gp", sampleDir);} catch (IOException e) {Log.e(TAG, "sdcard access error");return;}}mediaRecord.setOutputFile(storeFile.getAbsolutePath());mediaRecord.prepare();mediaRecord.start();}private void onStopRecord() {btnStart.setEnabled(true);btnStop.setEnabled(false);btnStart.requestFocus();stopRecord();}private void stopRecord() {mediaRecord.stop();mediaRecord.release();processAudioFile();}private void processAudioFile() {ContentValues cv = new ContentValues();long currentTime = System.currentTimeMillis();cv.put(MediaStore.Audio.Media.TITLE, "audio" + storeFile.getName());cv.put(MediaStore.Audio.Media.DATE_ADDED, (int)currentTime/1000);cv.put(MediaStore.Audio.Media.MIME_TYPE, "audio/3gp");cv.put(MediaStore.Audio.Media.DATA, storeFile.getAbsolutePath());Uri uri = getContentResolver().insert(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, cv);sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, uri));}class MyOnClickListener implements OnClickListener{@Overridepublic void onClick(View view) {switch ((Integer)view.getTag()) {case TAG_START:onStartRecord();break;case TAG_STOP:onStopRecord();break;default:break;}}}}

注意：需要在AndroidManifest.xml中加入以下权限 <uses-permission android:name="android.permission.RECORD_AUDIO"></uses-permission> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

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