| /* |
| * Copyright 2014 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.example.android.camera2video; |
| |
| import android.app.Activity; |
| import android.app.AlertDialog; |
| import android.app.Dialog; |
| import android.app.DialogFragment; |
| import android.app.Fragment; |
| import android.content.Context; |
| import android.content.DialogInterface; |
| import android.content.res.Configuration; |
| import android.graphics.Matrix; |
| import android.graphics.RectF; |
| import android.graphics.SurfaceTexture; |
| import android.hardware.camera2.CameraAccessException; |
| import android.hardware.camera2.CameraCaptureSession; |
| import android.hardware.camera2.CameraCharacteristics; |
| import android.hardware.camera2.CameraDevice; |
| import android.hardware.camera2.CameraManager; |
| import android.hardware.camera2.CameraMetadata; |
| import android.hardware.camera2.CaptureRequest; |
| import android.hardware.camera2.params.StreamConfigurationMap; |
| import android.media.MediaRecorder; |
| import android.os.Bundle; |
| import android.os.Handler; |
| import android.os.HandlerThread; |
| import android.util.Log; |
| import android.util.Size; |
| import android.util.SparseIntArray; |
| import android.view.LayoutInflater; |
| import android.view.Surface; |
| import android.view.TextureView; |
| import android.view.View; |
| import android.view.ViewGroup; |
| import android.widget.Button; |
| import android.widget.Toast; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.Comparator; |
| import java.util.List; |
| import java.util.concurrent.Semaphore; |
| import java.util.concurrent.TimeUnit; |
| |
| public class Camera2VideoFragment extends Fragment implements View.OnClickListener { |
| |
| private static final SparseIntArray ORIENTATIONS = new SparseIntArray(); |
| |
| private static final String TAG = "Camera2VideoFragment"; |
| |
| static { |
| ORIENTATIONS.append(Surface.ROTATION_0, 90); |
| ORIENTATIONS.append(Surface.ROTATION_90, 0); |
| ORIENTATIONS.append(Surface.ROTATION_180, 270); |
| ORIENTATIONS.append(Surface.ROTATION_270, 180); |
| } |
| |
| /** |
| * An {@link AutoFitTextureView} for camera preview. |
| */ |
| private AutoFitTextureView mTextureView; |
| |
| /** |
| * Button to record video |
| */ |
| private Button mButtonVideo; |
| |
| /** |
| * A refernce to the opened {@link android.hardware.camera2.CameraDevice}. |
| */ |
| private CameraDevice mCameraDevice; |
| |
| /** |
| * A reference to the current {@link android.hardware.camera2.CameraCaptureSession} for preview. |
| */ |
| private CameraCaptureSession mPreviewSession; |
| |
| /** |
| * {@link TextureView.SurfaceTextureListener} handles several lifecycle events on a |
| * {@link TextureView}. |
| */ |
| private TextureView.SurfaceTextureListener mSurfaceTextureListener |
| = new TextureView.SurfaceTextureListener() { |
| |
| @Override |
| public void onSurfaceTextureAvailable(SurfaceTexture surfaceTexture, |
| int width, int height) { |
| openCamera(width, height); |
| } |
| |
| @Override |
| public void onSurfaceTextureSizeChanged(SurfaceTexture surfaceTexture, |
| int width, int height) { |
| configureTransform(width, height); |
| } |
| |
| @Override |
| public boolean onSurfaceTextureDestroyed(SurfaceTexture surfaceTexture) { |
| return true; |
| } |
| |
| @Override |
| public void onSurfaceTextureUpdated(SurfaceTexture surfaceTexture) { |
| } |
| |
| }; |
| |
| /** |
| * The {@link android.util.Size} of camera preview. |
| */ |
| private Size mPreviewSize; |
| |
| /** |
| * The {@link android.util.Size} of video recording. |
| */ |
| private Size mVideoSize; |
| |
| /** |
| * Camera preview. |
| */ |
| private CaptureRequest.Builder mPreviewBuilder; |
| |
| /** |
| * MediaRecorder |
| */ |
| private MediaRecorder mMediaRecorder; |
| |
| /** |
| * Whether the app is recording video now |
| */ |
| private boolean mIsRecordingVideo; |
| |
| /** |
| * An additional thread for running tasks that shouldn't block the UI. |
| */ |
| private HandlerThread mBackgroundThread; |
| |
| /** |
| * A {@link Handler} for running tasks in the background. |
| */ |
| private Handler mBackgroundHandler; |
| |
| /** |
| * A {@link Semaphore} to prevent the app from exiting before closing the camera. |
| */ |
| private Semaphore mCameraOpenCloseLock = new Semaphore(1); |
| |
| /** |
| * {@link CameraDevice.StateCallback} is called when {@link CameraDevice} changes its status. |
| */ |
| private CameraDevice.StateCallback mStateCallback = new CameraDevice.StateCallback() { |
| |
| @Override |
| public void onOpened(CameraDevice cameraDevice) { |
| mCameraDevice = cameraDevice; |
| startPreview(); |
| mCameraOpenCloseLock.release(); |
| if (null != mTextureView) { |
| configureTransform(mTextureView.getWidth(), mTextureView.getHeight()); |
| } |
| } |
| |
| @Override |
| public void onDisconnected(CameraDevice cameraDevice) { |
| mCameraOpenCloseLock.release(); |
| cameraDevice.close(); |
| mCameraDevice = null; |
| } |
| |
| @Override |
| public void onError(CameraDevice cameraDevice, int error) { |
| mCameraOpenCloseLock.release(); |
| cameraDevice.close(); |
| mCameraDevice = null; |
| Activity activity = getActivity(); |
| if (null != activity) { |
| activity.finish(); |
| } |
| } |
| |
| }; |
| |
| public static Camera2VideoFragment newInstance() { |
| Camera2VideoFragment fragment = new Camera2VideoFragment(); |
| fragment.setRetainInstance(true); |
| return fragment; |
| } |
| |
| /** |
| * In this sample, we choose a video size with 3x4 aspect ratio. Also, we don't use sizes larger |
| * than 1080p, since MediaRecorder cannot handle such a high-resolution video. |
| * |
| * @param choices The list of available sizes |
| * @return The video size |
| */ |
| private static Size chooseVideoSize(Size[] choices) { |
| for (Size size : choices) { |
| if (size.getWidth() == size.getHeight() * 4 / 3 && size.getWidth() <= 1080) { |
| return size; |
| } |
| } |
| Log.e(TAG, "Couldn't find any suitable video size"); |
| return choices[choices.length - 1]; |
| } |
| |
| /** |
| * Given {@code choices} of {@code Size}s supported by a camera, chooses the smallest one whose |
| * width and height are at least as large as the respective requested values, and whose aspect |
| * ratio matches with the specified value. |
| * |
| * @param choices The list of sizes that the camera supports for the intended output class |
| * @param width The minimum desired width |
| * @param height The minimum desired height |
| * @param aspectRatio The aspect ratio |
| * @return The optimal {@code Size}, or an arbitrary one if none were big enough |
| */ |
| private static Size chooseOptimalSize(Size[] choices, int width, int height, Size aspectRatio) { |
| // Collect the supported resolutions that are at least as big as the preview Surface |
| List<Size> bigEnough = new ArrayList<Size>(); |
| int w = aspectRatio.getWidth(); |
| int h = aspectRatio.getHeight(); |
| for (Size option : choices) { |
| if (option.getHeight() == option.getWidth() * h / w && |
| option.getWidth() >= width && option.getHeight() >= height) { |
| bigEnough.add(option); |
| } |
| } |
| |
| // Pick the smallest of those, assuming we found any |
| if (bigEnough.size() > 0) { |
| return Collections.min(bigEnough, new CompareSizesByArea()); |
| } else { |
| Log.e(TAG, "Couldn't find any suitable preview size"); |
| return choices[0]; |
| } |
| } |
| |
| @Override |
| public View onCreateView(LayoutInflater inflater, ViewGroup container, |
| Bundle savedInstanceState) { |
| return inflater.inflate(R.layout.fragment_camera2_video, container, false); |
| } |
| |
| @Override |
| public void onViewCreated(final View view, Bundle savedInstanceState) { |
| mTextureView = (AutoFitTextureView) view.findViewById(R.id.texture); |
| mButtonVideo = (Button) view.findViewById(R.id.video); |
| mButtonVideo.setOnClickListener(this); |
| view.findViewById(R.id.info).setOnClickListener(this); |
| } |
| |
| @Override |
| public void onResume() { |
| super.onResume(); |
| startBackgroundThread(); |
| if (mTextureView.isAvailable()) { |
| openCamera(mTextureView.getWidth(), mTextureView.getHeight()); |
| } else { |
| mTextureView.setSurfaceTextureListener(mSurfaceTextureListener); |
| } |
| } |
| |
| @Override |
| public void onPause() { |
| closeCamera(); |
| stopBackgroundThread(); |
| super.onPause(); |
| } |
| |
| @Override |
| public void onClick(View view) { |
| switch (view.getId()) { |
| case R.id.video: { |
| if (mIsRecordingVideo) { |
| stopRecordingVideo(); |
| } else { |
| startRecordingVideo(); |
| } |
| break; |
| } |
| case R.id.info: { |
| Activity activity = getActivity(); |
| if (null != activity) { |
| new AlertDialog.Builder(activity) |
| .setMessage(R.string.intro_message) |
| .setPositiveButton(android.R.string.ok, null) |
| .show(); |
| } |
| break; |
| } |
| } |
| } |
| |
| /** |
| * Starts a background thread and its {@link Handler}. |
| */ |
| private void startBackgroundThread() { |
| mBackgroundThread = new HandlerThread("CameraBackground"); |
| mBackgroundThread.start(); |
| mBackgroundHandler = new Handler(mBackgroundThread.getLooper()); |
| } |
| |
| /** |
| * Stops the background thread and its {@link Handler}. |
| */ |
| private void stopBackgroundThread() { |
| mBackgroundThread.quitSafely(); |
| try { |
| mBackgroundThread.join(); |
| mBackgroundThread = null; |
| mBackgroundHandler = null; |
| } catch (InterruptedException e) { |
| e.printStackTrace(); |
| } |
| } |
| |
| /** |
| * Tries to open a {@link CameraDevice}. The result is listened by `mStateCallback`. |
| */ |
| private void openCamera(int width, int height) { |
| final Activity activity = getActivity(); |
| if (null == activity || activity.isFinishing()) { |
| return; |
| } |
| CameraManager manager = (CameraManager) activity.getSystemService(Context.CAMERA_SERVICE); |
| try { |
| if (!mCameraOpenCloseLock.tryAcquire(2500, TimeUnit.MILLISECONDS)) { |
| throw new RuntimeException("Time out waiting to lock camera opening."); |
| } |
| String cameraId = manager.getCameraIdList()[0]; |
| |
| // Choose the sizes for camera preview and video recording |
| CameraCharacteristics characteristics = manager.getCameraCharacteristics(cameraId); |
| StreamConfigurationMap map = characteristics |
| .get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP); |
| mVideoSize = chooseVideoSize(map.getOutputSizes(MediaRecorder.class)); |
| mPreviewSize = chooseOptimalSize(map.getOutputSizes(SurfaceTexture.class), |
| width, height, mVideoSize); |
| |
| int orientation = getResources().getConfiguration().orientation; |
| if (orientation == Configuration.ORIENTATION_LANDSCAPE) { |
| mTextureView.setAspectRatio(mPreviewSize.getWidth(), mPreviewSize.getHeight()); |
| } else { |
| mTextureView.setAspectRatio(mPreviewSize.getHeight(), mPreviewSize.getWidth()); |
| } |
| configureTransform(width, height); |
| mMediaRecorder = new MediaRecorder(); |
| manager.openCamera(cameraId, mStateCallback, null); |
| } catch (CameraAccessException e) { |
| Toast.makeText(activity, "Cannot access the camera.", Toast.LENGTH_SHORT).show(); |
| activity.finish(); |
| } catch (NullPointerException e) { |
| // Currently an NPE is thrown when the Camera2API is used but not supported on the |
| // device this code runs. |
| new ErrorDialog().show(getFragmentManager(), "dialog"); |
| } catch (InterruptedException e) { |
| throw new RuntimeException("Interrupted while trying to lock camera opening."); |
| } |
| } |
| |
| private void closeCamera() { |
| try { |
| mCameraOpenCloseLock.acquire(); |
| if (null != mCameraDevice) { |
| mCameraDevice.close(); |
| mCameraDevice = null; |
| } |
| if (null != mMediaRecorder) { |
| mMediaRecorder.release(); |
| mMediaRecorder = null; |
| } |
| } catch (InterruptedException e) { |
| throw new RuntimeException("Interrupted while trying to lock camera closing."); |
| } finally { |
| mCameraOpenCloseLock.release(); |
| } |
| } |
| |
| /** |
| * Start the camera preview. |
| */ |
| private void startPreview() { |
| if (null == mCameraDevice || !mTextureView.isAvailable() || null == mPreviewSize) { |
| return; |
| } |
| try { |
| setUpMediaRecorder(); |
| SurfaceTexture texture = mTextureView.getSurfaceTexture(); |
| assert texture != null; |
| texture.setDefaultBufferSize(mPreviewSize.getWidth(), mPreviewSize.getHeight()); |
| mPreviewBuilder = mCameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_RECORD); |
| List<Surface> surfaces = new ArrayList<Surface>(); |
| |
| Surface previewSurface = new Surface(texture); |
| surfaces.add(previewSurface); |
| mPreviewBuilder.addTarget(previewSurface); |
| |
| Surface recorderSurface = mMediaRecorder.getSurface(); |
| surfaces.add(recorderSurface); |
| mPreviewBuilder.addTarget(recorderSurface); |
| |
| mCameraDevice.createCaptureSession(surfaces, new CameraCaptureSession.StateCallback() { |
| |
| @Override |
| public void onConfigured(CameraCaptureSession cameraCaptureSession) { |
| mPreviewSession = cameraCaptureSession; |
| updatePreview(); |
| } |
| |
| @Override |
| public void onConfigureFailed(CameraCaptureSession cameraCaptureSession) { |
| Activity activity = getActivity(); |
| if (null != activity) { |
| Toast.makeText(activity, "Failed", Toast.LENGTH_SHORT).show(); |
| } |
| } |
| }, mBackgroundHandler); |
| } catch (CameraAccessException e) { |
| e.printStackTrace(); |
| } catch (IOException e) { |
| e.printStackTrace(); |
| } |
| } |
| |
| /** |
| * Update the camera preview. {@link #startPreview()} needs to be called in advance. |
| */ |
| private void updatePreview() { |
| if (null == mCameraDevice) { |
| return; |
| } |
| try { |
| setUpCaptureRequestBuilder(mPreviewBuilder); |
| HandlerThread thread = new HandlerThread("CameraPreview"); |
| thread.start(); |
| mPreviewSession.setRepeatingRequest(mPreviewBuilder.build(), null, mBackgroundHandler); |
| } catch (CameraAccessException e) { |
| e.printStackTrace(); |
| } |
| } |
| |
| private void setUpCaptureRequestBuilder(CaptureRequest.Builder builder) { |
| builder.set(CaptureRequest.CONTROL_MODE, CameraMetadata.CONTROL_MODE_AUTO); |
| } |
| |
| /** |
| * Configures the necessary {@link android.graphics.Matrix} transformation to `mTextureView`. |
| * This method should not to be called until the camera preview size is determined in |
| * openCamera, or until the size of `mTextureView` is fixed. |
| * |
| * @param viewWidth The width of `mTextureView` |
| * @param viewHeight The height of `mTextureView` |
| */ |
| private void configureTransform(int viewWidth, int viewHeight) { |
| Activity activity = getActivity(); |
| if (null == mTextureView || null == mPreviewSize || null == activity) { |
| return; |
| } |
| int rotation = activity.getWindowManager().getDefaultDisplay().getRotation(); |
| Matrix matrix = new Matrix(); |
| RectF viewRect = new RectF(0, 0, viewWidth, viewHeight); |
| RectF bufferRect = new RectF(0, 0, mPreviewSize.getHeight(), mPreviewSize.getWidth()); |
| float centerX = viewRect.centerX(); |
| float centerY = viewRect.centerY(); |
| if (Surface.ROTATION_90 == rotation || Surface.ROTATION_270 == rotation) { |
| bufferRect.offset(centerX - bufferRect.centerX(), centerY - bufferRect.centerY()); |
| matrix.setRectToRect(viewRect, bufferRect, Matrix.ScaleToFit.FILL); |
| float scale = Math.max( |
| (float) viewHeight / mPreviewSize.getHeight(), |
| (float) viewWidth / mPreviewSize.getWidth()); |
| matrix.postScale(scale, scale, centerX, centerY); |
| matrix.postRotate(90 * (rotation - 2), centerX, centerY); |
| } |
| mTextureView.setTransform(matrix); |
| } |
| |
| private void setUpMediaRecorder() throws IOException { |
| final Activity activity = getActivity(); |
| if (null == activity) { |
| return; |
| } |
| mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC); |
| mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.SURFACE); |
| mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4); |
| mMediaRecorder.setOutputFile(getVideoFile(activity).getAbsolutePath()); |
| mMediaRecorder.setVideoEncodingBitRate(10000000); |
| mMediaRecorder.setVideoFrameRate(30); |
| mMediaRecorder.setVideoSize(mVideoSize.getWidth(), mVideoSize.getHeight()); |
| mMediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264); |
| mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC); |
| int rotation = activity.getWindowManager().getDefaultDisplay().getRotation(); |
| int orientation = ORIENTATIONS.get(rotation); |
| mMediaRecorder.setOrientationHint(orientation); |
| mMediaRecorder.prepare(); |
| } |
| |
| private File getVideoFile(Context context) { |
| return new File(context.getExternalFilesDir(null), "video.mp4"); |
| } |
| |
| private void startRecordingVideo() { |
| try { |
| // UI |
| mButtonVideo.setText(R.string.stop); |
| mIsRecordingVideo = true; |
| |
| // Start recording |
| mMediaRecorder.start(); |
| } catch (IllegalStateException e) { |
| e.printStackTrace(); |
| } |
| } |
| |
| private void stopRecordingVideo() { |
| // UI |
| mIsRecordingVideo = false; |
| mButtonVideo.setText(R.string.record); |
| // Stop recording |
| mMediaRecorder.stop(); |
| mMediaRecorder.reset(); |
| Activity activity = getActivity(); |
| if (null != activity) { |
| Toast.makeText(activity, "Video saved: " + getVideoFile(activity), |
| Toast.LENGTH_SHORT).show(); |
| } |
| startPreview(); |
| } |
| |
| /** |
| * Compares two {@code Size}s based on their areas. |
| */ |
| static class CompareSizesByArea implements Comparator<Size> { |
| |
| @Override |
| public int compare(Size lhs, Size rhs) { |
| // We cast here to ensure the multiplications won't overflow |
| return Long.signum((long) lhs.getWidth() * lhs.getHeight() - |
| (long) rhs.getWidth() * rhs.getHeight()); |
| } |
| |
| } |
| |
| public static class ErrorDialog extends DialogFragment { |
| |
| @Override |
| public Dialog onCreateDialog(Bundle savedInstanceState) { |
| final Activity activity = getActivity(); |
| return new AlertDialog.Builder(activity) |
| .setMessage("This device doesn't support Camera2 API.") |
| .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() { |
| @Override |
| public void onClick(DialogInterface dialogInterface, int i) { |
| activity.finish(); |
| } |
| }) |
| .create(); |
| } |
| |
| } |
| |
| } |
