安卓使用surfaceview+Camera+MediaRecorder实现视频录制

public class RecordVideoActivity extends Activity implements SurfaceHolder.Callback {

private SurfaceView mSurfaceview;
private ImageView mBtnStartStop;
private boolean mStartedFlg = false;
private MediaRecorder mRecorder;
private SurfaceHolder mSurfaceHolder;
private Camera mCamera;
private String path = "";
private int recordTime = 0;
private LinearLayout llTime;
private TextView tvTime;
private TimerTask recordTask;
private ProgressBar pbRecord;
private int progress = 0;

Handler handler = new Handler() {
@Override
public void handleMessage(Message msg) {
if (msg.what == 1) {
if (progress == 240) {
if (mRecorder != null) {
mRecorder.stop();
mRecorder.reset();
}
if (recordTask != null) {
recordTask.cancel();
}
Intent intent = new Intent();
intent.putExtra("path", path);
setResult(RESULT_OK, intent);
finish();
}
pbRecord.setProgress(progress);
}
}
};

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

requestWindowFeature(Window.FEATURE_NO_TITLE);// 去掉标题栏
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);// 设置全屏
getWindow().setFormat(PixelFormat.TRANSLUCENT);
setContentView(R.layout.video2);
initView();
mBtnStartStop.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
starRecordVideo();
}
});
}

/**
* 初始化控件以及录制视频的分辨率
*/
private void initView() {
mSurfaceview = (SurfaceView) findViewById(R.id.surfaceview);
llTime = (LinearLayout) findViewById(R.id.ll_time);
tvTime = (TextView) findViewById(R.id.tv_time);
pbRecord = (ProgressBar) findViewById(R.id.progressBar);
pbRecord.setMax(240);//设置录制最大时间为120s
mSurfaceHolder = mSurfaceview.getHolder();
//设置屏幕分辨率
mSurfaceHolder.setFixedSize(640, 480);
mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
mSurfaceHolder.addCallback(this);
mBtnStartStop = (ImageView) findViewById(R.id.btnStartStop);
SurfaceHolder holder = mSurfaceview.getHolder();// 取得holder
holder.addCallback(this); // holder加入回调接口
// setType必须设置，要不出错.
holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}

private void starRecordVideo() {
if (!mStartedFlg) {
// Start
if (mRecorder == null) {
mRecorder = new MediaRecorder(); // Create MediaRecorder
}
try {
/**
* 解锁camera
* 设置输出格式为mpeg_4（mp4），此格式音频编码格式必须为AAC否则网页无法播放
*/
mCamera.unlock();
mRecorder.setCamera(mCamera);
mRecorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER);
mRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
mRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
//音频编码格式对应应为AAC
mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
//视频编码格式对应应为H264
mRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);
mRecorder.setVideoSize(640, 480);
mRecorder.setVideoEncodingBitRate(600 * 1024);
mRecorder.setPreviewDisplay(mSurfaceHolder.getSurface());

/**
* 设置输出地址
*/
String sdPath = getSDPath();
if (sdPath != null) {
File dir = new File(sdPath + "/VideoAndAudio");
if (!dir.exists()) {
dir.mkdir();
}
path = dir + "/" + getDate() + ".mp4";

mRecorder.setOutputFile(path);
mRecorder.setOrientationHint(90);
mRecorder.prepare();
mRecorder.start();   // Recording is now started
llTime.setVisibility(View.VISIBLE);
pbRecord.setVisibility(View.VISIBLE);
starRecordTimer();
mStartedFlg = true;
updateProgress();
mBtnStartStop.setImageResource(R.mipmap.pause);
}
} catch (Exception e) {
/**
* 当用户拒绝录音权限会执行这里
*/
Toast.makeText(RecordVideoActivity.this, "没有录音权限", Toast.LENGTH_SHORT).show();
finish();
}

} else {
if (mStartedFlg) {
try {
mRecorder.stop();
if (recordTask != null) {
recordTask.cancel();
}
mRecorder.reset();
mStartedFlg = false;
Toast.makeText(RecordVideoActivity.this, "录制完成" + "视频地址:" + path, Toast.LENGTH_SHORT).show();
finish();
} catch (Exception e) {
Toast.makeText(RecordVideoActivity.this, "录制失败", Toast.LENGTH_SHORT).show();
}
}
mStartedFlg = false; // Set button status flag
}
}

private void updateProgress() {
/**
* 进度条线程
*/
new Thread(new Runnable() {
@Override
public void run() {
while (progress < 240) {
if (mStartedFlg) {
progress++;
Log.e("ssd", progress + "");
try {
Thread.sleep(500);
handler.sendEmptyMessage(1);
} catch (InterruptedException e) {
e.printStackTrace();
}
} else {
break;
}
}
}
}).start();
}

/**
* 开启计时
*/
private void starRecordTimer() {
recordTask = new TimerTask() {
@Override
public void run() {
runOnUiThread(new Runnable() {
@Override
public void run() {
recordTime++;
int m = recordTime / 60;
int s = recordTime % 60;
String strm = m + "";
String strs = s + "";
if (m < 10) {
strm = "0" + m;
}
if (s < 10) {
strs = "0" + s;
}
tvTime.setText(strm + ":" + strs);
}
});
}
};
Timer recordTimer = new Timer(true);
recordTimer.schedule(recordTask, 0, 1000);
}

@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
// TODO Auto-generated method stub
// 将holder，这个holder为开始在onCreate里面取得的holder，将它赋给mSurfaceHolder
mSurfaceHolder = holder;
}

@Override
public void surfaceCreated(SurfaceHolder holder) {
// TODO Auto-generated method stub
// 将holder，这个holder为开始在onCreate里面取得的holder，将它赋给mSurfaceHolder
mSurfaceHolder = holder;
startPreView(holder);
}

@Override
public void surfaceDestroyed(SurfaceHolder holder) {
// TODO Auto-generated method stub
// surfaceDestroyed的时候同时对象设置为null
mSurfaceview = null;
mSurfaceHolder = null;
if (mRecorder != null) {
mRecorder.release(); // Now the object cannot be reused
mRecorder = null;
}
}

/**
* 开启预览
*
* @param holder
*/
private void startPreView(SurfaceHolder holder) {
try {
if (mCamera == null) {
mCamera = Camera.open(Camera.CameraInfo.CAMERA_FACING_BACK);
}
if (mRecorder == null) {
mRecorder = new MediaRecorder();
}
if (mRecorder != null) {
mCamera.setDisplayOrientation(90);
mCamera.setPreviewDisplay(holder);
Camera.Parameters parameters = mCamera.getParameters();
/**
* Camera自动对焦
*/
List<String> focusModes = parameters.getSupportedFocusModes();
if (focusModes != null) {
for (String mode : focusModes) {
mode.contains("continuous-video");
parameters.setFocusMode("continuous-video");
}
}
mCamera.setParameters(parameters);
mCamera.startPreview();
}
} catch (Exception e) {
/**
* 用户拒绝录像权限
*/
Toast.makeText(RecordVideoActivity.this, "用户拒绝了录像权限", Toast.LENGTH_SHORT).show();
finish();
}
}

/**
* 获取系统时间
*
* @return
*/
public static String getDate() {
Calendar ca = Calendar.getInstance();
int year = ca.get(Calendar.YEAR);           // 获取年份
int month = ca.get(Calendar.MONTH);         // 获取月份
int day = ca.get(Calendar.DATE);            // 获取日
int minute = ca.get(Calendar.MINUTE);       // 分
int hour = ca.get(Calendar.HOUR);           // 小时
int second = ca.get(Calendar.SECOND);       // 秒
String date = "" + year + (month + 1) + day + hour + minute + second;
Log.d(TAG, "date:" + date);

return date;
}

/**
* 获取SD path
*
* @return
*/
public String getSDPath() {
File sdDir = null;
boolean sdCardExist = Environment.getExternalStorageState()
.equals(Environment.MEDIA_MOUNTED); // 判断sd卡是否存在
if (sdCardExist) {
sdDir = Environment.getExternalStorageDirectory();// 获取跟目录
return sdDir.toString();
}

return null;
}

@Override
protected void onPause() {
super.onPause();
llTime.setVisibility(View.GONE);
recordTime = 0;
tvTime.setText("00.00");
mStartedFlg = false;
mBtnStartStop.setImageResource(R.mipmap.pause);
if (recordTask != null) {
recordTask.cancel();
}
// 如果正在使用MediaRecorder，首先需要释放它。
releaseMediaRecorder();
// 在暂停事件中立即释放摄像头
releaseCamera();
}

private void releaseMediaRecorder() {
if (mRecorder != null) {
// 清除recorder配置
mRecorder.reset();
// 释放recorder对象
mRecorder.release();
mRecorder = null;
// 为后续使用锁定摄像头
mCamera.lock();
}
}

private void releaseCamera() {
if (mCamera != null) {
// 为其它应用释放摄像头
mCamera.release();
mCamera = null;
}
}

}