¿Cómo puedo grabar un video en mi aplicación de Android?

¿Cómo puedo capturar una grabación de video en Android?

Aquí hay un ejemplo simple de grabación de video usando MediaRecorder:

public class VideoCapture extends Activity implements OnClickListener, SurfaceHolder.Callback { MediaRecorder recorder; SurfaceHolder holder; boolean recording = false; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE); recorder = new MediaRecorder(); initRecorder(); setContentView(R.layout.main); SurfaceView cameraView = (SurfaceView) findViewById(R.id.CameraView); holder = cameraView.getHolder(); holder.addCallback(this); holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); cameraView.setClickable(true); cameraView.setOnClickListener(this); } private void initRecorder() { recorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT); recorder.setVideoSource(MediaRecorder.VideoSource.DEFAULT); CamcorderProfile cpHigh = CamcorderProfile .get(CamcorderProfile.QUALITY_HIGH); recorder.setProfile(cpHigh); recorder.setOutputFile("/sdcard/videocapture_example.mp4"); recorder.setMaxDuration(50000); // 50 seconds recorder.setMaxFileSize(5000000); // Approximately 5 megabytes } private void prepareRecorder() { recorder.setPreviewDisplay(holder.getSurface()); try { recorder.prepare(); } catch (IllegalStateException e) { e.printStackTrace(); finish(); } catch (IOException e) { e.printStackTrace(); finish(); } } public void onClick(View v) { if (recording) { recorder.stop(); recording = false; // Let's initRecorder so we can record again initRecorder(); prepareRecorder(); } else { recording = true; recorder.start(); } } public void surfaceCreated(SurfaceHolder holder) { prepareRecorder(); } public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { } public void surfaceDestroyed(SurfaceHolder holder) { if (recording) { recorder.stop(); recording = false; } recorder.release(); finish(); } } 

Es de mi libro: Pro Android Media: Desarrollo de aplicaciones de gráficos, música, video y Rich Media para teléfonos inteligentes y tabletas

Además, no olvide incluir estos permisos en el manifiesto:

    

Aquí hay otro ejemplo que está funcionando

 public class EnregistrementVideoStackActivity extends Activity implements SurfaceHolder.Callback { private SurfaceHolder surfaceHolder; private SurfaceView surfaceView; public MediaRecorder mrec = new MediaRecorder(); private Button startRecording = null; File video; private Camera mCamera; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.camera_surface); Log.i(null , "Video starting"); startRecording = (Button)findViewById(R.id.buttonstart); mCamera = Camera.open(); surfaceView = (SurfaceView) findViewById(R.id.surface_camera); surfaceHolder = surfaceView.getHolder(); surfaceHolder.addCallback(this); surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); } @Override public boolean onCreateOptionsMenu(Menu menu) { menu.add(0, 0, 0, "StartRecording"); menu.add(0, 1, 0, "StopRecording"); return super.onCreateOptionsMenu(menu); } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case 0: try { startRecording(); } catch (Exception e) { String message = e.getMessage(); Log.i(null, "Problem Start"+message); mrec.release(); } break; case 1: //GoToAllNotes mrec.stop(); mrec.release(); mrec = null; break; default: break; } return super.onOptionsItemSelected(item); } protected void startRecording() throws IOException { mrec = new MediaRecorder(); // Works well mCamera.unlock(); mrec.setCamera(mCamera); mrec.setPreviewDisplay(surfaceHolder.getSurface()); mrec.setVideoSource(MediaRecorder.VideoSource.CAMERA); mrec.setAudioSource(MediaRecorder.AudioSource.MIC); mrec.setProfile(CamcorderProfile.get(CamcorderProfile.QUALITY_HIGH)); mrec.setPreviewDisplay(surfaceHolder.getSurface()); mrec.setOutputFile("/sdcard/zzzz.3gp"); mrec.prepare(); mrec.start(); } protected void stopRecording() { mrec.stop(); mrec.release(); mCamera.release(); } private void releaseMediaRecorder(){ if (mrec != null) { mrec.reset(); // clear recorder configuration mrec.release(); // release the recorder object mrec = null; mCamera.lock(); // lock camera for later use } } private void releaseCamera(){ if (mCamera != null){ mCamera.release(); // release the camera for other applications mCamera = null; } } @Override public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { } @Override public void surfaceCreated(SurfaceHolder holder) { if (mCamera != null){ Parameters params = mCamera.getParameters(); mCamera.setParameters(params); } else { Toast.makeText(getApplicationContext(), "Camera not available!", Toast.LENGTH_LONG).show(); finish(); } } @Override public void surfaceDestroyed(SurfaceHolder holder) { mCamera.stopPreview(); mCamera.release(); } } 

camera_surface.xml

      

Y, por supuesto, incluye estos permisos en manifiesto:

    

Graba audio y video usando la misma clase MediaRecorder. Es bastante simple. Aquí hay un ejemplo .

Esta demostración será útil para ti ….

video.xml

     

Tu actividad principal: Video.java

  public class Video extends Activity implements OnClickListener, SurfaceHolder.Callback { private static final String TAG = "CAMERA_TUTORIAL"; private SurfaceView mSurfaceView; private SurfaceHolder mHolder; private Camera mCamera; private boolean previewRunning; private MediaRecorder mMediaRecorder; private final int maxDurationInMs = 20000; private final long maxFileSizeInBytes = 500000; private final int videoFramesPerSecond = 20; Button btn_record; boolean mInitSuccesful = false; File file; ToggleButton mToggleButton; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.video); setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE); mSurfaceView = (SurfaceView) findViewById(R.id.surface_camera); mHolder = mSurfaceView.getHolder(); mHolder.addCallback(this); mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); mToggleButton = (ToggleButton) findViewById(R.id.toggleRecordingButton); mToggleButton.setOnClickListener(new OnClickListener() { @Override // toggle video recording public void onClick(View v) { if (((ToggleButton) v).isChecked()) mMediaRecorder.start(); else { mMediaRecorder.stop(); mMediaRecorder.reset(); try { initRecorder(mHolder.getSurface()); } catch (IOException e) { e.printStackTrace(); } } } }); } private void initRecorder(Surface surface) throws IOException { // It is very important to unlock the camera before doing setCamera // or it will results in a black preview if (mCamera == null) { mCamera = Camera.open(); mCamera.unlock(); } if (mMediaRecorder == null) mMediaRecorder = new MediaRecorder(); mMediaRecorder.setPreviewDisplay(surface); mMediaRecorder.setCamera(mCamera); mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA); mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT); mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT); mMediaRecorder.setOutputFile(this.initFile().getAbsolutePath()); // No limit. Don't forget to check the space on disk. mMediaRecorder.setMaxDuration(50000); mMediaRecorder.setVideoFrameRate(24); mMediaRecorder.setVideoSize(1280, 720); mMediaRecorder.setVideoEncodingBitRate(3000000); mMediaRecorder.setAudioEncodingBitRate(8000); mMediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.DEFAULT); mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); try { mMediaRecorder.prepare(); } catch (IllegalStateException e) { // This is thrown if the previous calls are not called with the // proper order e.printStackTrace(); } mInitSuccesful = true; } private File initFile() { // File dir = new // File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MOVIES), // this File dir = new File(Environment.getExternalStorageDirectory(), this .getClass().getPackage().getName()); if (!dir.exists() && !dir.mkdirs()) { Log.wtf(TAG, "Failed to create storage directory: " + dir.getAbsolutePath()); Toast.makeText(Video.this, "not record", Toast.LENGTH_SHORT); file = null; } else { file = new File(dir.getAbsolutePath(), new SimpleDateFormat( "'IMG_'yyyyMMddHHmmss'.mp4'").format(new Date())); } return file; } @Override public void surfaceCreated(SurfaceHolder holder) { try { if (!mInitSuccesful) initRecorder(mHolder.getSurface()); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } private void shutdown() { // Release MediaRecorder and especially the Camera as it's a shared // object that can be used by other applications mMediaRecorder.reset(); mMediaRecorder.release(); mCamera.release(); // once the objects have been released they can't be reused mMediaRecorder = null; mCamera = null; } @Override public void surfaceDestroyed(SurfaceHolder holder) { shutdown(); } @Override public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { // TODO Auto-generated method stub } @Override public void onClick(View v) { // TODO Auto-generated method stub } } 

Clase MediaMetadataRetriever

 public class MediaMetadataRetriever { static { System.loadLibrary("media_jni"); native_init(); } // The field below is accessed by native methods @SuppressWarnings("unused") private int mNativeContext; public MediaMetadataRetriever() { native_setup(); } /** * Call this method before setDataSource() so that the mode becomes * effective for subsequent operations. This method can be called only once * at the beginning if the intended mode of operation for a * MediaMetadataRetriever object remains the same for its whole lifetime, * and thus it is unnecessary to call this method each time setDataSource() * is called. If this is not never called (which is allowed), by default the * intended mode of operation is to both capture frame and retrieve meta * data (ie, MODE_GET_METADATA_ONLY | MODE_CAPTURE_FRAME_ONLY). * Often, this may not be what one wants, since doing this has negative * performance impact on execution time of a call to setDataSource(), since * both types of operations may be time consuming. * * @param mode The intended mode of operation. Can be any combination of * MODE_GET_METADATA_ONLY and MODE_CAPTURE_FRAME_ONLY: * 1. MODE_GET_METADATA_ONLY & MODE_CAPTURE_FRAME_ONLY: * For neither frame capture nor meta data retrieval * 2. MODE_GET_METADATA_ONLY: For meta data retrieval only * 3. MODE_CAPTURE_FRAME_ONLY: For frame capture only * 4. MODE_GET_METADATA_ONLY | MODE_CAPTURE_FRAME_ONLY: * For both frame capture and meta data retrieval */ public native void setMode(int mode); /** * @return the current mode of operation. A negative return value indicates * some runtime error has occurred. */ public native int getMode(); /** * Sets the data source (file pathname) to use. Call this * method before the rest of the methods in this class. This method may be * time-consuming. * * @param path The path of the input media file. * @throws IllegalArgumentException If the path is invalid. */ public native void setDataSource(String path) throws IllegalArgumentException; /** * Sets the data source (FileDescriptor) to use. It is the caller's * responsibility to close the file descriptor. It is safe to do so as soon * as this call returns. Call this method before the rest of the methods in * this class. This method may be time-consuming. * * @param fd the FileDescriptor for the file you want to play * @param offset the offset into the file where the data to be played starts, * in bytes. It must be non-negative * @param length the length in bytes of the data to be played. It must be * non-negative. * @throws IllegalArgumentException if the arguments are invalid */ public native void setDataSource(FileDescriptor fd, long offset, long length) throws IllegalArgumentException; /** * Sets the data source (FileDescriptor) to use. It is the caller's * responsibility to close the file descriptor. It is safe to do so as soon * as this call returns. Call this method before the rest of the methods in * this class. This method may be time-consuming. * * @param fd the FileDescriptor for the file you want to play * @throws IllegalArgumentException if the FileDescriptor is invalid */ public void setDataSource(FileDescriptor fd) throws IllegalArgumentException { // intentionally less than LONG_MAX setDataSource(fd, 0, 0x7ffffffffffffffL); } /** * Sets the data source as a content Uri. Call this method before * the rest of the methods in this class. This method may be time-consuming. * * @param context the Context to use when resolving the Uri * @param uri the Content URI of the data you want to play * @throws IllegalArgumentException if the Uri is invalid * @throws SecurityException if the Uri cannot be used due to lack of * permission. */ public void setDataSource(Context context, Uri uri) throws IllegalArgumentException, SecurityException { if (uri == null) { throw new IllegalArgumentException(); } String scheme = uri.getScheme(); if(scheme == null || scheme.equals("file")) { setDataSource(uri.getPath()); return; } AssetFileDescriptor fd = null; try { ContentResolver resolver = context.getContentResolver(); try { fd = resolver.openAssetFileDescriptor(uri, "r"); } catch(FileNotFoundException e) { throw new IllegalArgumentException(); } if (fd == null) { throw new IllegalArgumentException(); } FileDescriptor descriptor = fd.getFileDescriptor(); if (!descriptor.valid()) { throw new IllegalArgumentException(); } // Note: using getDeclaredLength so that our behavior is the same // as previous versions when the content provider is returning // a full file. if (fd.getDeclaredLength() < 0) { setDataSource(descriptor); } else { setDataSource(descriptor, fd.getStartOffset(), fd.getDeclaredLength()); } return; } catch (SecurityException ex) { } finally { try { if (fd != null) { fd.close(); } } catch(IOException ioEx) { } } setDataSource(uri.toString()); } /** * Call this method after setDataSource(). This method retrieves the * meta data value associated with the keyCode. * * The keyCode currently supported is listed below as METADATA_XXX * constants. With any other value, it returns a null pointer. * * @param keyCode One of the constants listed below at the end of the class. * @return The meta data value associate with the given keyCode on success; * null on failure. */ public native String extractMetadata(int keyCode); /** * Call this method after setDataSource(). This method finds a * representative frame if successful and returns it as a bitmap. This is * useful for generating a thumbnail for an input media source. * * @return A Bitmap containing a representative video frame, which * can be null, if such a frame cannot be retrieved. */ public native Bitmap captureFrame(); /** * Call this method after setDataSource(). This method finds the optional * graphic or album art associated (embedded or external url linked) the * related data source. * * @return null if no such graphic is found. */ public native byte[] extractAlbumArt(); /** * Call it when one is done with the object. This method releases the memory * allocated internally. */ public native void release(); private native void native_setup(); private static native void native_init(); private native final void native_finalize(); @Override protected void finalize() throws Throwable { try { native_finalize(); } finally { super.finalize(); } } public static final int MODE_GET_METADATA_ONLY = 0x01; public static final int MODE_CAPTURE_FRAME_ONLY = 0x02; /* * Do not change these values without updating their counterparts * in include/media/mediametadataretriever.h! */ public static final int METADATA_KEY_CD_TRACK_NUMBER = 0; public static final int METADATA_KEY_ALBUM = 1; public static final int METADATA_KEY_ARTIST = 2; public static final int METADATA_KEY_AUTHOR = 3; public static final int METADATA_KEY_COMPOSER = 4; public static final int METADATA_KEY_DATE = 5; public static final int METADATA_KEY_GENRE = 6; public static final int METADATA_KEY_TITLE = 7; public static final int METADATA_KEY_YEAR = 8; public static final int METADATA_KEY_DURATION = 9; public static final int METADATA_KEY_NUM_TRACKS = 10; public static final int METADATA_KEY_IS_DRM_CRIPPLED = 11; public static final int METADATA_KEY_CODEC = 12; public static final int METADATA_KEY_RATING = 13; public static final int METADATA_KEY_COMMENT = 14; public static final int METADATA_KEY_COPYRIGHT = 15; public static final int METADATA_KEY_BIT_RATE = 16; public static final int METADATA_KEY_FRAME_RATE = 17; public static final int METADATA_KEY_VIDEO_FORMAT = 18; public static final int METADATA_KEY_VIDEO_HEIGHT = 19; public static final int METADATA_KEY_VIDEO_WIDTH = 20; public static final int METADATA_KEY_WRITER = 21; // Add more here... } 

Echa un vistazo a este código de Vista previa de la cámara de muestra, CameraPreview . Esto lo ayudaría a desarrollar el código de grabación de video para la vista previa del video, crear el objeto MediaRecorder y establecer los parámetros de grabación de video.

Para beneficio de los buscadores, este ejemplo le dará una vista previa activa, con un botón de inicio / detención para la grabación. Fue modificado desde este blog de Android y parece bastante confiable.

clase java (VideoWithSurfaceVw)

 package <>; import java.io.IOException; import java.text.SimpleDateFormat; import java.util.Date; import android.app.Activity; import android.content.Context; import android.hardware.Camera; import android.media.CamcorderProfile; import android.media.MediaRecorder; import android.os.Bundle; import android.view.SurfaceHolder; import android.view.SurfaceView; import android.view.View; import android.widget.Button; import android.widget.FrameLayout; import android.widget.Toast; public class VideoWithSurfaceVw extends Activity{ // Adapted from http://sandyandroidtutorials.blogspot.co.uk/2013/05/android-video-capture-tutorial.html private Camera myCamera; private MyCameraSurfaceView myCameraSurfaceView; private MediaRecorder mediaRecorder; Button myButton; SurfaceHolder surfaceHolder; boolean recording; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); recording = false; setContentView(R.layout.activity_video_with_surface_vw); //Get Camera for preview myCamera = getCameraInstance(); if(myCamera == null){ Toast.makeText(VideoWithSurfaceVw.this, "Fail to get Camera", Toast.LENGTH_LONG).show(); } myCameraSurfaceView = new MyCameraSurfaceView(this, myCamera); FrameLayout myCameraPreview = (FrameLayout)findViewById(R.id.videoview); myCameraPreview.addView(myCameraSurfaceView); myButton = (Button)findViewById(R.id.mybutton); myButton.setOnClickListener(myButtonOnClickListener); } Button.OnClickListener myButtonOnClickListener = new Button.OnClickListener(){ @Override public void onClick(View v) { // TODO Auto-generated method stub try{ if(recording){ // stop recording and release camera mediaRecorder.stop(); // stop the recording releaseMediaRecorder(); // release the MediaRecorder object //Exit after saved //finish(); myButton.setText("REC"); recording = false; }else{ //Release Camera before MediaRecorder start releaseCamera(); if(!prepareMediaRecorder()){ Toast.makeText(VideoWithSurfaceVw.this, "Fail in prepareMediaRecorder()!\n - Ended -", Toast.LENGTH_LONG).show(); finish(); } mediaRecorder.start(); recording = true; myButton.setText("STOP"); } }catch (Exception ex){ ex.printStackTrace(); } }}; private Camera getCameraInstance(){ // TODO Auto-generated method stub Camera c = null; try { c = Camera.open(); // attempt to get a Camera instance } catch (Exception e){ // Camera is not available (in use or does not exist) } return c; // returns null if camera is unavailable } private String getFileName_CustomFormat() { SimpleDateFormat sdfDate = new SimpleDateFormat("yyyy-MM-dd HH_mm_ss"); Date now = new Date(); String strDate = sdfDate.format(now); return strDate; } private boolean prepareMediaRecorder(){ myCamera = getCameraInstance(); mediaRecorder = new MediaRecorder(); myCamera.unlock(); mediaRecorder.setCamera(myCamera); mediaRecorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER); mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA); mediaRecorder.setProfile(CamcorderProfile.get(CamcorderProfile.QUALITY_HIGH)); mediaRecorder.setOutputFile("/sdcard/" + getFileName_CustomFormat() + ".mp4"); //mediaRecorder.setOutputFile("/sdcard/myvideo1.mp4"); mediaRecorder.setMaxDuration(60000); // Set max duration 60 sec. mediaRecorder.setMaxFileSize(50000000); // Set max file size 50M mediaRecorder.setPreviewDisplay(myCameraSurfaceView.getHolder().getSurface()); try { mediaRecorder.prepare(); } catch (IllegalStateException e) { releaseMediaRecorder(); return false; } catch (IOException e) { releaseMediaRecorder(); return false; } return true; } @Override protected void onPause() { super.onPause(); releaseMediaRecorder(); // if you are using MediaRecorder, release it first releaseCamera(); // release the camera immediately on pause event } private void releaseMediaRecorder(){ if (mediaRecorder != null) { mediaRecorder.reset(); // clear recorder configuration mediaRecorder.release(); // release the recorder object mediaRecorder = new MediaRecorder(); myCamera.lock(); // lock camera for later use } } private void releaseCamera(){ if (myCamera != null){ myCamera.release(); // release the camera for other applications myCamera = null; } } public class MyCameraSurfaceView extends SurfaceView implements SurfaceHolder.Callback{ private SurfaceHolder mHolder; private Camera mCamera; public MyCameraSurfaceView(Context context, Camera camera) { super(context); mCamera = camera; // Install a SurfaceHolder.Callback so we get notified when the // underlying surface is created and destroyed. mHolder = getHolder(); mHolder.addCallback(this); // deprecated setting, but required on Android versions prior to 3.0 mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); } @Override public void surfaceChanged(SurfaceHolder holder, int format, int weight, int height) { // If your preview can change or rotate, take care of those events here. // Make sure to stop the preview before resizing or reformatting it. if (mHolder.getSurface() == null){ // preview surface does not exist return; } // stop preview before making changes try { mCamera.stopPreview(); } catch (Exception e){ // ignore: tried to stop a non-existent preview } // make any resize, rotate or reformatting changes here // start preview with new settings try { mCamera.setPreviewDisplay(mHolder); mCamera.startPreview(); } catch (Exception e){ } } @Override public void surfaceCreated(SurfaceHolder holder) { // TODO Auto-generated method stub // The Surface has been created, now tell the camera where to draw the preview. try { mCamera.setPreviewDisplay(holder); mCamera.startPreview(); } catch (IOException e) { } } @Override public void surfaceDestroyed(SurfaceHolder holder) { // TODO Auto-generated method stub } } } 

actividad (activity_video_with_surface_vw)

       

Como nota al margen: parece que hay un error en la API de Android o en la documentación defectuosa, o tal vez soy simplemente estúpido. Los documentos de Google indican claramente lo siguiente:

Nota: a partir de Android 4.0 (API nivel 14), las llamadas Camera.lock () y Camera.unlock () se administran automáticamente.

Ver: http://developer.android.com/guide/topics/media/camera.html

¡Este no parece ser el caso!

Después de luchar por días literarios sin ningún éxito y muchos pequeños problemas como “no se pudo iniciar” un poco de errores, decidí implementar manualmente el locking y ¡BAM! todo funcionó bien

Estoy usando el emulador de genymotion para un dispositivo 4.1.1 con un min SDK de 14.

El ejemplo anterior funcionará si está utilizando la cámara trasera. Si está utilizando la cámara frontal, tendrá que ajustar algunas cosas:

En primer lugar, deberá agregar un nuevo permiso en el manifiesto.

En su método initRecorder , en lugar de

 CamcorderProfile cpHigh = CamcorderProfile .get(CamcorderProfile.QUALITY_HIGH); recorder.setProfile(cpHigh); 

Necesitas usar:

 CamcorderProfile profile = CamcorderProfile.get(Camera.CameraInfo.CAMERA_FACING_FRONT, CamcorderProfile.QUALITY_LOW); recorder.setProfile(profile); 

porque CamcorderProfile.QUALITY_HIGH está reservado para la cámara trasera.

También deberá establecer el tamaño de video para la grabadora de medios tal como está en su vista de superficie.

Aquí está el ejemplo completo de grabación de video desde la cámara frontal con una pequeña pantalla de vista previa:

Android.manifest

       

activity_camera.xml

      

CameraActivity.java

 public class SongVideoActivity extends BaseActivity implements SurfaceHolder.Callback { private int mCameraContainerWidth = 0; private SurfaceView mSurfaceView = null; private SurfaceHolder mSurfaceHolder = null; private Camera mCamera = null; private boolean mIsRecording = false; private int mPreviewHeight; private int mPreviewWidth; MediaRecorder mRecorder; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_song_video); Thread.setDefaultUncaughtExceptionHandler(new Thread.UncaughtExceptionHandler() { @Override public void uncaughtException(Thread thread, Throwable ex) { releaseMediaRecorder(); releaseCamera(); } }); mCamera = getCamera(); //camera preview mSurfaceView = (SurfaceView) findViewById(R.id.surfaceView); mSurfaceHolder = mSurfaceView.getHolder(); mSurfaceHolder.addCallback(this); // deprecated setting, but required on Android versions prior to 3.0 mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); mCameraContainerWidth = mSurfaceView.getLayoutParams().width; findViewById(R.id.btnRecord).setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if (mIsRecording) { stopRecording(); } else { // initialize video camera if (prepareVideoRecorder()) { // Camera is available and unlocked, MediaRecorder is prepared, // now you can start recording mRecorder.start(); // inform the user that recording has started Toast.makeText(getApplicationContext(), "Started recording", Toast.LENGTH_SHORT).show(); mIsRecording = true; } else { // prepare didn't work, release the camera releaseMediaRecorder(); // inform user } } } }); } private void stopRecording() { mRecorder.stop(); // stop the recording releaseMediaRecorder(); // release the MediaRecorder object mCamera.lock(); // take camera access back from MediaRecorder // inform the user that recording has stopped Toast.makeText(this, "Recording complete", Toast.LENGTH_SHORT).show(); mIsRecording = false; } @Override protected void onDestroy() { super.onDestroy(); releaseMediaRecorder(); // if you are using MediaRecorder, release it first releaseCamera(); // release the camera immediately on pause event } private Camera getCamera() { Camera.CameraInfo cameraInfo = new Camera.CameraInfo(); for (int camIdx = 0; camIdx < Camera.getNumberOfCameras(); camIdx++) { Camera.getCameraInfo(camIdx, cameraInfo); if (cameraInfo.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) { try { return mCamera = Camera.open(camIdx); } catch (RuntimeException e) { Log.e("cameras", "Camera failed to open: " + e.getLocalizedMessage()); } } } return null; } @Override protected void onPause() { super.onPause(); releaseMediaRecorder(); // if you are using MediaRecorder, release it first releaseCamera(); // release the camera immediately on pause event } private Camera.Size getBestPreviewSize(Camera.Parameters parameters) { Camera.Size result=null; for (Camera.Size size : parameters.getSupportedPreviewSizes()) { if(size.width < size.height) continue; //we are only interested in landscape variants if (result == null) { result = size; } else { int resultArea = result.width*result.height; int newArea = size.width*size.height; if (newArea > resultArea) { result = size; } } } return(result); } private boolean prepareVideoRecorder(){ mRecorder = new MediaRecorder(); // Step 1: Unlock and set camera to MediaRecorder mCamera.unlock(); mRecorder.setCamera(mCamera); // Step 2: Set sources mRecorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT); mRecorder.setVideoSource(MediaRecorder.VideoSource.DEFAULT); //recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP); // Step 3: Set a CamcorderProfile (requires API Level 8 or higher) // Customise your profile based on a pre-existing profile CamcorderProfile profile = CamcorderProfile.get(Camera.CameraInfo.CAMERA_FACING_FRONT, CamcorderProfile.QUALITY_LOW); mRecorder.setProfile(profile); // Step 4: Set output file mRecorder.setOutputFile(new File(getFilesDir(), "movie-" + UUID.randomUUID().toString()).getAbsolutePath()); //recorder.setMaxDuration(50000); // 50 seconds //recorder.setMaxFileSize(500000000); // Approximately 500 megabytes mRecorder.setVideoSize(mPreviewWidth, mPreviewHeight); // Step 5: Set the preview output mRecorder.setPreviewDisplay(mSurfaceHolder.getSurface()); // Step 6: Prepare configured MediaRecorder try { mRecorder.prepare(); } catch (IllegalStateException e) { Toast.makeText(getApplicationContext(), "exception: " + e.getMessage(), Toast.LENGTH_LONG).show(); releaseMediaRecorder(); return false; } catch (IOException e) { Toast.makeText(getApplicationContext(), "exception: " + e.getMessage(), Toast.LENGTH_LONG).show(); releaseMediaRecorder(); return false; } return true; } private void releaseMediaRecorder(){ if (mRecorder != null) { mRecorder.reset(); // clear recorder configuration mRecorder.release(); // release the recorder object mRecorder = null; mCamera.lock(); // lock camera for later use } } private void releaseCamera(){ if (mCamera != null){ mCamera.release(); // release the camera for other applications mCamera = null; } } @Override public void surfaceCreated(SurfaceHolder holder) { // The Surface has been created, now tell the camera where to draw the preview. Camera.Parameters parameters = mCamera.getParameters(); parameters.setRecordingHint(true); Camera.Size size = getBestPreviewSize(parameters); mCamera.setParameters(parameters); //resize the view to the specified surface view width in layout int newHeight = size.height / (size.width / mCameraContainerWidth); mSurfaceView.getLayoutParams().height = newHeight; } @Override public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { mPreviewHeight = mCamera.getParameters().getPreviewSize().height; mPreviewWidth = mCamera.getParameters().getPreviewSize().width; mCamera.stopPreview(); try { mCamera.setPreviewDisplay(mSurfaceHolder); } catch (IOException e) { e.printStackTrace(); } mCamera.startPreview(); } @Override public void surfaceDestroyed(SurfaceHolder holder) { if (mIsRecording) { stopRecording(); } releaseMediaRecorder(); releaseCamera(); } } 

A partir de diciembre de 2017, ha habido algunas actualizaciones, por ejemplo, el uso de android.hardware.Camera está en desuso ahora. Mientras que el nuevo android.hardware.camera2 viene con cosas útiles como un CameraManager .

A mí personalmente me gusta mucho este ejemplo, que hace uso de esta API actual y funciona como un encanto: https://github.com/googlesamples/android-Camera2Video

También incluye pedirle al usuario los permisos necesarios al inicio y una vista previa del video antes de comenzar la grabación del video.

(Además, creo que el código es realmente hermoso (y esto es muy raro para mí ^^), pero esa es solo mi opinión subjetiva).

Aquí hay una función que invoca una intención de capturar video.

 static final int REQUEST_VIDEO_CAPTURE = 1; private void dispatchTakeVideoIntent() { Intent takeVideoIntent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE); if (takeVideoIntent.resolveActivity(getPackageManager()) != null) { startActivityForResult(takeVideoIntent, REQUEST_VIDEO_CAPTURE); } } 

El siguiente código recupera este video y lo muestra en VideoView.

 @Override protected void onActivityResult(int requestCode, int resultCode, Intent intent) { if (requestCode == REQUEST_VIDEO_CAPTURE && resultCode == RESULT_OK) { Uri videoUri = intent.getData(); mVideoView.setVideoURI(videoUri); } }