Android视频录制

一、通过Intent调用系统录像程序

final int CODE_VIDEO_SYS = 0x001 ;

Intent intent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE);
startActivityForResult(intent, CODE_VIDEO_SYS);

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
　　super.onActivityResult(requestCode, resultCode, data);
　　if(resultCode== Activity.RESULT_OK){
　　　　switch (requestCode){
　　　　　　case CODE_VIDEO_SYS :
　　　　　　　　Uri uri = data.getData() ;
　　　　　　　　if(uri!=null){
　　　　　　　　　　Toast.makeText(getActivity(),"视频位置："+uri.getPath(),Toast.LENGTH_SHORT).show();
　　　　　　　　}
　　　　　　　　break ;
　　　　}
    }
}

二、调用Camera和MediaRecorder录制视频

To quickly switch to video recording mode, use these steps:

1. Obtain and initialize a Camera and start preview as described above.
2. Call unlock() to allow the media process to access the camera.
3. Pass the camera to setCamera(Camera). See MediaRecorder information about video recording.
4. When finished recording, call reconnect() to re-acquire and re-lock the camera.
5. If desired, restart preview and take more photos or videos.
6. Call stopPreview() and release() as described above.

This class is not thread-safe, and is meant for use from one event thread. Most long-running operations (preview, focus, photo capture, etc) happen asynchronously and invoke callbacks as necessary. Callbacks will be invoked on the event thread open(int) was called from. This class's methods must never be called from multiple threads at once.

Caution: Different Android-powered devices may have different hardware specifications, such as megapixel ratings and auto-focus capabilities. In order for your application to be compatible with more devices, you should not make assumptions about the device camera specifications.

基本步骤和使用Camera拍照一样，直到第6步启用预览之后，点击按钮开始录制视频时

void startRecord(){
　　mRecorder = new MediaRecorder();
　　//在某些手机上共享Camera会起冲突，导致录制的视频花屏，所以需要停止Camera的预览，启用MediaRecoder的预览
　　mCamera.stopPreview();
　　mCamera.unlock();
　　mRecorder.setCamera(mCamera);
　　mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
　　mRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
　　CamcorderProfile profile = CamcorderProfile.get(CamcorderProfile.QUALITY_480P);
　　mRecorder.setProfile(profile);

　　mRecorder.setPreviewDisplay(mSurface.getHolder().getSurface());
　　mRecorder.setOutputFile("/sdcard/video.mp4");

　　try {
　　　　mRecorder.prepare();
　　　　mRecorder.start();
　　} catch (IOException e) {
　　　　e.printStackTrace();
　　}
}

停止录制视频

void stopRecord(){
　　mRecorder.stop();
　　mRecorder.reset();
　　try {
　　　　mCamera.reconnect();
　　} catch (IOException e) {
　　　　e.printStackTrace();
　　}
}