android开发之调用手机的摄像头使用MediaRecorder录像并播放

mediarecorder = new MediaRecorder();// 创建mediarecorder对象 
// 设置录制视频源为Camera(相机) 
mediarecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA); 
// 设置录制完成后视频的封装格式THREE_GPP为3gp.MPEG_4为mp4 
mediarecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP); 
// 设置录制的视频编码h263 h264 
mediarecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264); 
// 设置视频录制的分辨率。必须放在设置编码和格式的后面，否则报错 
mediarecorder.setVideoSize(176, 144); 
// 设置录制的视频帧率。必须放在设置编码和格式的后面，否则报错 
mediarecorder.setVideoFrameRate(20); 
mediarecorder.setPreviewDisplay(surfaceView.getHolder().getSurface()); 
// 设置视频文件输出的路径 
lastFileName = newFileName(); 
mediarecorder.setOutputFile(lastFileName); 
try { 
// 准备录制 
mediarecorder.prepare(); 
// 开始录制 
mediarecorder.start(); 
} catch (IllegalStateException e) { 
// TODO Auto-generated catch block 
e.printStackTrace(); 
} catch (IOException e) { 
// TODO Auto-generated catch block 
e.printStackTrace(); 
} 
结束拍摄： 
if (mediarecorder != null) { 
// 停止 
mediarecorder.stop(); 
mediarecorder.release(); 
mediarecorder = null; 
} 

package zyf.demo.moviedemo; 
import java.io.File; 
import java.io.IOException; 
import java.util.Timer; 
import java.util.TimerTask; 
import android.media.MediaRecorder; 
import android.view.SurfaceView; 
public class MovieRecorder { 
private MediaRecorder mediarecorder; 
boolean isRecording; 
public void startRecording(SurfaceView surfaceView) { 
mediarecorder = new MediaRecorder();// 创建mediarecorder对象 
// 设置录制视频源为Camera(相机) 
mediarecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA); 
// 设置录制完成后视频的封装格式THREE_GPP为3gp.MPEG_4为mp4 
mediarecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP); 
// 设置录制的视频编码h263 h264 
mediarecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264); 
// 设置视频录制的分辨率。必须放在设置编码和格式的后面，否则报错 
mediarecorder.setVideoSize(176, 144); 
// 设置录制的视频帧率。必须放在设置编码和格式的后面，否则报错 
mediarecorder.setVideoFrameRate(20); 
mediarecorder.setPreviewDisplay(surfaceView.getHolder().getSurface()); 
// 设置视频文件输出的路径 
lastFileName = newFileName(); 
mediarecorder.setOutputFile(lastFileName); 
try { 
// 准备录制 
mediarecorder.prepare(); 
// 开始录制 
mediarecorder.start(); 
} catch (IllegalStateException e) { 
// TODO Auto-generated catch block 
e.printStackTrace(); 
} catch (IOException e) { 
// TODO Auto-generated catch block 
e.printStackTrace(); 
} 
isRecording = true; 
timeSize = 0; 
timer = new Timer(); 
timer.schedule(new TimerTask() { 
@Override 
public void run() { 
// TODO Auto-generated method stub 
timeSize++; 
} 
}, 0,1000); 
} 
Timer timer; 
int timeSize = 0; 
private String lastFileName; 
public void stopRecording() { 
if (mediarecorder != null) { 
// 停止 
mediarecorder.stop(); 
mediarecorder.release(); 
mediarecorder = null; 
timer.cancel(); 
if (null != lastFileName && !"".equals(lastFileName)) { 
File f = new File(lastFileName); 
String name = f.getName().substring(0, 
f.getName().lastIndexOf(".3gp")); 
name += "_" + timeSize + "s.3gp"; 
String newPath = f.getParentFile().getAbsolutePath() + "/" 
+ name; 
if (f.renameTo(new File(newPath))) { 
int i = 0; 
i++; 
} 
} 
} 
} 
public String newFileName() { 
try { 
return File.createTempFile("/mov_", ".3gp").getAbsolutePath(); 
} catch (IOException e) { 
// TODO Auto-generated catch block 
e.printStackTrace(); 
return null; 
} 
} 
public void release() { 
if (mediarecorder != null) { 
// 停止 
mediarecorder.stop(); 
mediarecorder.release(); 
mediarecorder = null; 
} 
} } 

public void play(String fileName, SurfaceView view) { 
mPlayer = new MediaPlayer(); 
mPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC); 
mPlayer.setDisplay(view.getHolder()); // 定义一个SurfaceView播放它 
mPlayer.setOnCompletionListener(new OnCompletionListener() { 
@Override 
public void onCompletion(MediaPlayer arg0) { 
stop(); 
// canvas.drawColor(Color.TRANSPARENT, 
// PorterDuff.Mode.CLEAR); 
} 
}); 
try { 
mPlayer.setDataSource(fileName); 
mPlayer.prepare(); 
} catch (IllegalStateException e) { 
// TODO Auto-generated catch block 
e.printStackTrace(); 
} catch (IOException e) { 
// TODO Auto-generated catch block 
e.printStackTrace(); 
} 
mPlayer.start(); 
} 
结束播放时： 
public void stop() { 
if (mPlayer != null) { 
mPlayer.release(); 
mPlayer = null; 
} 
}