| /* |
| * Copyright (C) 2013 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.mediarecorder; |
| |
| import android.annotation.TargetApi; |
| import android.app.Activity; |
| import android.hardware.Camera; |
| import android.media.CamcorderProfile; |
| import android.media.MediaRecorder; |
| import android.os.AsyncTask; |
| import android.os.Build; |
| import android.os.Bundle; |
| import android.util.Log; |
| import android.view.Menu; |
| import android.view.TextureView; |
| import android.view.View; |
| import android.widget.Button; |
| |
| import com.example.android.common.media.CameraHelper; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.util.List; |
| |
| /** |
| * This activity uses the camera/camcorder as the A/V source for the {@link android.media.MediaRecorder} API. |
| * A {@link android.view.TextureView} is used as the camera preview which limits the code to API 14+. This |
| * can be easily replaced with a {@link android.view.SurfaceView} to run on older devices. |
| */ |
| public class MainActivity extends Activity { |
| |
| private Camera mCamera; |
| private TextureView mPreview; |
| private MediaRecorder mMediaRecorder; |
| private File mOutputFile; |
| |
| private boolean isRecording = false; |
| private static final String TAG = "Recorder"; |
| private Button captureButton; |
| |
| @Override |
| protected void onCreate(Bundle savedInstanceState) { |
| super.onCreate(savedInstanceState); |
| setContentView(R.layout.sample_main); |
| |
| mPreview = (TextureView) findViewById(R.id.surface_view); |
| captureButton = (Button) findViewById(R.id.button_capture); |
| } |
| |
| /** |
| * The capture button controls all user interaction. When recording, the button click |
| * stops recording, releases {@link android.media.MediaRecorder} and {@link android.hardware.Camera}. When not recording, |
| * it prepares the {@link android.media.MediaRecorder} and starts recording. |
| * |
| * @param view the view generating the event. |
| */ |
| public void onCaptureClick(View view) { |
| if (isRecording) { |
| // BEGIN_INCLUDE(stop_release_media_recorder) |
| |
| // stop recording and release camera |
| try { |
| mMediaRecorder.stop(); // stop the recording |
| } catch (RuntimeException e) { |
| // RuntimeException is thrown when stop() is called immediately after start(). |
| // In this case the output file is not properly constructed ans should be deleted. |
| Log.d(TAG, "RuntimeException: stop() is called immediately after start()"); |
| //noinspection ResultOfMethodCallIgnored |
| mOutputFile.delete(); |
| } |
| releaseMediaRecorder(); // release the MediaRecorder object |
| mCamera.lock(); // take camera access back from MediaRecorder |
| |
| // inform the user that recording has stopped |
| setCaptureButtonText("Capture"); |
| isRecording = false; |
| releaseCamera(); |
| // END_INCLUDE(stop_release_media_recorder) |
| |
| } else { |
| |
| // BEGIN_INCLUDE(prepare_start_media_recorder) |
| |
| new MediaPrepareTask().execute(null, null, null); |
| |
| // END_INCLUDE(prepare_start_media_recorder) |
| |
| } |
| } |
| |
| private void setCaptureButtonText(String title) { |
| captureButton.setText(title); |
| } |
| |
| @Override |
| protected void onPause() { |
| super.onPause(); |
| // if we are using MediaRecorder, release it first |
| releaseMediaRecorder(); |
| // release the camera immediately on pause event |
| releaseCamera(); |
| } |
| |
| private void releaseMediaRecorder(){ |
| if (mMediaRecorder != null) { |
| // clear recorder configuration |
| mMediaRecorder.reset(); |
| // release the recorder object |
| mMediaRecorder.release(); |
| mMediaRecorder = null; |
| // Lock camera for later use i.e taking it back from MediaRecorder. |
| // MediaRecorder doesn't need it anymore and we will release it if the activity pauses. |
| mCamera.lock(); |
| } |
| } |
| |
| private void releaseCamera(){ |
| if (mCamera != null){ |
| // release the camera for other applications |
| mCamera.release(); |
| mCamera = null; |
| } |
| } |
| |
| @TargetApi(Build.VERSION_CODES.HONEYCOMB) |
| private boolean prepareVideoRecorder(){ |
| |
| // BEGIN_INCLUDE (configure_preview) |
| mCamera = CameraHelper.getDefaultCameraInstance(); |
| |
| // We need to make sure that our preview and recording video size are supported by the |
| // camera. Query camera to find all the sizes and choose the optimal size given the |
| // dimensions of our preview surface. |
| Camera.Parameters parameters = mCamera.getParameters(); |
| List<Camera.Size> mSupportedPreviewSizes = parameters.getSupportedPreviewSizes(); |
| List<Camera.Size> mSupportedVideoSizes = parameters.getSupportedVideoSizes(); |
| Camera.Size optimalSize = CameraHelper.getOptimalVideoSize(mSupportedVideoSizes, |
| mSupportedPreviewSizes, mPreview.getWidth(), mPreview.getHeight()); |
| |
| // Use the same size for recording profile. |
| CamcorderProfile profile = CamcorderProfile.get(CamcorderProfile.QUALITY_HIGH); |
| profile.videoFrameWidth = optimalSize.width; |
| profile.videoFrameHeight = optimalSize.height; |
| |
| // likewise for the camera object itself. |
| parameters.setPreviewSize(profile.videoFrameWidth, profile.videoFrameHeight); |
| mCamera.setParameters(parameters); |
| try { |
| // Requires API level 11+, For backward compatibility use {@link setPreviewDisplay} |
| // with {@link SurfaceView} |
| mCamera.setPreviewTexture(mPreview.getSurfaceTexture()); |
| } catch (IOException e) { |
| Log.e(TAG, "Surface texture is unavailable or unsuitable" + e.getMessage()); |
| return false; |
| } |
| // END_INCLUDE (configure_preview) |
| |
| |
| // BEGIN_INCLUDE (configure_media_recorder) |
| mMediaRecorder = new MediaRecorder(); |
| |
| // Step 1: Unlock and set camera to MediaRecorder |
| mCamera.unlock(); |
| mMediaRecorder.setCamera(mCamera); |
| |
| // Step 2: Set sources |
| mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT ); |
| mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA); |
| |
| // Step 3: Set a CamcorderProfile (requires API Level 8 or higher) |
| mMediaRecorder.setProfile(profile); |
| |
| // Step 4: Set output file |
| mOutputFile = CameraHelper.getOutputMediaFile(CameraHelper.MEDIA_TYPE_VIDEO); |
| if (mOutputFile == null) { |
| return false; |
| } |
| mMediaRecorder.setOutputFile(mOutputFile.getPath()); |
| // END_INCLUDE (configure_media_recorder) |
| |
| // Step 5: Prepare configured MediaRecorder |
| try { |
| mMediaRecorder.prepare(); |
| } catch (IllegalStateException e) { |
| Log.d(TAG, "IllegalStateException preparing MediaRecorder: " + e.getMessage()); |
| releaseMediaRecorder(); |
| return false; |
| } catch (IOException e) { |
| Log.d(TAG, "IOException preparing MediaRecorder: " + e.getMessage()); |
| releaseMediaRecorder(); |
| return false; |
| } |
| return true; |
| } |
| |
| /** |
| * Asynchronous task for preparing the {@link android.media.MediaRecorder} since it's a long blocking |
| * operation. |
| */ |
| class MediaPrepareTask extends AsyncTask<Void, Void, Boolean> { |
| |
| @Override |
| protected Boolean doInBackground(Void... voids) { |
| // initialize video camera |
| if (prepareVideoRecorder()) { |
| // Camera is available and unlocked, MediaRecorder is prepared, |
| // now you can start recording |
| mMediaRecorder.start(); |
| |
| isRecording = true; |
| } else { |
| // prepare didn't work, release the camera |
| releaseMediaRecorder(); |
| return false; |
| } |
| return true; |
| } |
| |
| @Override |
| protected void onPostExecute(Boolean result) { |
| if (!result) { |
| MainActivity.this.finish(); |
| } |
| // inform the user that recording has started |
| setCaptureButtonText("Stop"); |
| |
| } |
| } |
| |
| } |