android 音视频刻制

android 音视频录制

package cn.media;import java.io.File;import java.io.IOException;import android.app.Activity;import android.media.MediaRecorder;import android.os.Bundle;import android.os.Environment;import android.view.SurfaceHolder;import android.view.SurfaceView;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;//视频录制：
public class MediaConnection extends Activity {private File myRecAudioFile;private SurfaceView mSurfaceView;private SurfaceHolder mSurfaceHolder;private Button buttonStart;private Button buttonStop;private File dir;private MediaRecorder recorder;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.video);mSurfaceView = (SurfaceView) findViewById(R.id.videoView);mSurfaceHolder = mSurfaceView.getHolder();mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);buttonStart = (Button) findViewById(R.id.start);buttonStop = (Button) findViewById(R.id.stop);File defaultDir = Environment.getExternalStorageDirectory();String path = defaultDir.getAbsolutePath() + File.separator + "V"+ File.separator;// 创建文件夹存放视频dir = new File(path);if (!dir.exists()) {dir.mkdir();}recorder = new MediaRecorder();buttonStart.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {recorder();}});buttonStop.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {recorder.stop();recorder.reset();recorder.release();recorder = null;}});}public void recorder() {try {myRecAudioFile = File.createTempFile("video", ".3gp", dir);// 创建临时文件recorder.setPreviewDisplay(mSurfaceHolder.getSurface());// 预览recorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);// 视频源recorder.setAudioSource(MediaRecorder.AudioSource.MIC);// 录音源为麦克风recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);// 输出格式为3gprecorder.setVideoSize(800, 480);// 视频尺寸recorder.setVideoFrameRate(15);// 视频帧频率recorder.setVideoEncoder(MediaRecorder.VideoEncoder.H263);// 视频编码recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);// 音频编码recorder.setMaxDuration(10000);// 最大期限recorder.setOutputFile(myRecAudioFile.getAbsolutePath());// 保存路径recorder.prepare();recorder.start();} catch (IOException e) {e.printStackTrace();}}}
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音频录制：

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package cn.media;import java.io.File;import java.io.IOException;import android.app.Activity;import android.content.ContentResolver;import android.content.ContentValues;import android.content.Intent;import android.media.MediaRecorder;import android.net.Uri;import android.os.Environment;import android.provider.MediaStore;import android.util.Log;/** * 音频录制 * @author Administrator * */public class MyMediaRecoder extends Activity {MediaRecorder mrec;File audiofile=null;private static final String TAG="SoundRecordingDemo";protected void startRecording() throws IOException{//设置音频源mrec.setAudioSource(MediaRecorder.AudioSource.MIC);//设置文件输出格式mrec.setOutputFormat(MediaRecorder.AudioEncoder.AMR_NB);if(audiofile==null){File sampleDir=Environment.getExternalStorageDirectory();try{audiofile=File.createTempFile("ibm", ".3gp",sampleDir);}catch(IOException e){Log.e(TAG,"sdcard access error");return;}}//文件输出路径mrec.setOutputFile(audiofile.getAbsolutePath());mrec.prepare();mrec.start();}protected void stopRecording(){mrec.stop();mrec.release();processAudiofile(audiofile);}protected void processAudiofile(File audiofile){ContentValues values=new ContentValues(3);long current=System.currentTimeMillis();values.put(MediaStore.Audio.Media.TITLE,"audio"+audiofile.getName());values.put(MediaStore.Audio.Media.TITLE, "audio" + audiofile.getName()); values.put(MediaStore.Audio.Media.DATE_ADDED, (int) (current / 1000)); values.put(MediaStore.Audio.Media.MIME_TYPE, "audio/3gpp"); values.put(MediaStore.Audio.Media.DATA, audiofile.getAbsolutePath()); ContentResolver contentResolver=getContentResolver();Uri base=MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;Uri newUri=contentResolver.insert(base,values);sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE,newUri));}}

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?直接调用系统中能够播放此音频文件的程序来处理：

  Intent intent=new Intent(android.content.Intent.ACTION_VIEW);        File sdcardPath=Environment.getExternalStorageDirectory();        Uri audioFileUri=Uri.fromFile(sdcardPath);        intent.setDataAndType(audioFileUri,"audio/mp3");        startActivity(intent);

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权限：

<!--音频录制权限-->   <uses-permission android:name="android.permission.RECORD_AUDIO"></uses-permission><!--视频录制权限-->     <uses-permission android:name="android.permission.CAMERA"/>              <uses-permission android:name="android.permission.RECORD_AUDIO"/>              <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>  

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比较：视频录制除了对音频录制所要设置的部分外，还需要视频方面的设置。