| /* |
| * Copyright (C) 2019 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 androidx.camera.integration.view; |
| |
| import android.content.Intent; |
| import android.graphics.Rect; |
| import android.hardware.Camera; |
| import android.net.Uri; |
| import android.os.Build; |
| import android.os.Environment; |
| import android.os.Handler; |
| import android.os.Message; |
| import android.util.Log; |
| import android.view.MotionEvent; |
| import android.view.View; |
| import android.view.ViewConfiguration; |
| import android.widget.Toast; |
| |
| import androidx.annotation.NonNull; |
| import androidx.annotation.Nullable; |
| import androidx.camera.core.ImageCapture.ImageCaptureError; |
| import androidx.camera.core.ImageCapture.OnImageSavedCallback; |
| import androidx.camera.core.VideoCapture; |
| import androidx.camera.core.VideoCapture.OnVideoSavedCallback; |
| import androidx.camera.core.impl.utils.executor.CameraXExecutors; |
| import androidx.camera.view.CameraView; |
| import androidx.camera.view.CameraView.CaptureMode; |
| |
| import java.io.File; |
| import java.text.SimpleDateFormat; |
| import java.util.Locale; |
| |
| /** |
| * A {@link View.OnTouchListener} which converts a view's touches into camera actions. |
| * |
| * <p>The listener converts touches on a {@link View}, such as a button, into appropriate photo |
| * taking or video recording actions through a {@link CameraView}. A click is interpreted as a |
| * take-photo signal, while a long-press is interpreted as a record-video signal. |
| */ |
| class CaptureViewOnTouchListener |
| implements View.OnTouchListener, OnImageSavedCallback, OnVideoSavedCallback { |
| private static final String TAG = "ViewOnTouchListener"; |
| |
| private static final String FILENAME = "yyyy-MM-dd-HH-mm-ss-SSS"; |
| private static final String PHOTO_EXTENSION = ".jpg"; |
| private static final String VIDEO_EXTENSION = ".mp4"; |
| |
| private static final int TAP = 1; |
| private static final int HOLD = 2; |
| private static final int RELEASE = 3; |
| |
| private final long mLongPress = ViewConfiguration.getLongPressTimeout(); |
| private final CameraView mCameraView; |
| |
| // TODO: Use a Handler for a background thread, rather than running on the current (main) |
| // thread. |
| private final Handler mHandler = |
| new Handler() { |
| @Override |
| public void handleMessage(Message msg) { |
| switch (msg.what) { |
| case TAP: |
| onTap(); |
| break; |
| case HOLD: |
| onHold(); |
| if (mCameraView.getMaxVideoDuration() > 0) { |
| sendEmptyMessageDelayed(RELEASE, mCameraView.getMaxVideoDuration()); |
| } |
| break; |
| case RELEASE: |
| onRelease(); |
| break; |
| default: |
| // No op |
| } |
| } |
| }; |
| |
| private long mDownEventTimestamp; |
| private Rect mViewBoundsRect; |
| |
| /** Creates a new listener which links to the given {@link CameraView}. */ |
| CaptureViewOnTouchListener(CameraView cameraView) { |
| mCameraView = cameraView; |
| } |
| |
| /** Called when the user taps. */ |
| void onTap() { |
| if (mCameraView.getCaptureMode() == CaptureMode.IMAGE |
| || mCameraView.getCaptureMode() == CaptureMode.MIXED) { |
| mCameraView.takePicture(createNewFile(PHOTO_EXTENSION), |
| CameraXExecutors.mainThreadExecutor(), this); |
| } |
| } |
| |
| /** Called when the user holds (long presses). */ |
| void onHold() { |
| if (mCameraView.getCaptureMode() == CaptureMode.VIDEO |
| || mCameraView.getCaptureMode() == CaptureMode.MIXED) { |
| mCameraView.startRecording(createNewFile(VIDEO_EXTENSION), |
| CameraXExecutors.mainThreadExecutor(), this); |
| } |
| } |
| |
| /** Called when the user releases. */ |
| void onRelease() { |
| if (mCameraView.getCaptureMode() == CaptureMode.VIDEO |
| || mCameraView.getCaptureMode() == CaptureMode.MIXED) { |
| mCameraView.stopRecording(); |
| } |
| } |
| |
| @Override |
| public boolean onTouch(View view, MotionEvent event) { |
| switch (event.getAction()) { |
| case MotionEvent.ACTION_DOWN: |
| mDownEventTimestamp = System.currentTimeMillis(); |
| mViewBoundsRect = |
| new Rect(view.getLeft(), view.getTop(), view.getRight(), view.getBottom()); |
| mHandler.sendEmptyMessageDelayed(HOLD, mLongPress); |
| view.setPressed(true); |
| break; |
| case MotionEvent.ACTION_MOVE: |
| // If the user moves their finger off the button, trigger RELEASE |
| if (mViewBoundsRect.contains( |
| view.getLeft() + (int) event.getX(), view.getTop() + (int) event.getY())) { |
| break; |
| } |
| // Fall-through |
| case MotionEvent.ACTION_CANCEL: |
| clearHandler(); |
| if (deltaSinceDownEvent() > mLongPress |
| && (mCameraView.getMaxVideoDuration() <= 0 |
| || deltaSinceDownEvent() < mCameraView.getMaxVideoDuration())) { |
| mHandler.sendEmptyMessage(RELEASE); |
| } |
| view.setPressed(false); |
| break; |
| case MotionEvent.ACTION_UP: |
| clearHandler(); |
| if (deltaSinceDownEvent() < mLongPress) { |
| mHandler.sendEmptyMessage(TAP); |
| } else if ((mCameraView.getMaxVideoDuration() <= 0 |
| || deltaSinceDownEvent() < mCameraView.getMaxVideoDuration())) { |
| mHandler.sendEmptyMessage(RELEASE); |
| } |
| view.setPressed(false); |
| break; |
| default: |
| // No op |
| } |
| return true; |
| } |
| |
| private long deltaSinceDownEvent() { |
| return System.currentTimeMillis() - mDownEventTimestamp; |
| } |
| |
| private void clearHandler() { |
| mHandler.removeMessages(TAP); |
| mHandler.removeMessages(HOLD); |
| mHandler.removeMessages(RELEASE); |
| } |
| |
| private File createNewFile(String extension) { |
| // Use Locale.US to ensure we get ASCII digits |
| return new File( |
| Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), |
| new SimpleDateFormat(FILENAME, Locale.US).format(System.currentTimeMillis()) |
| + extension); |
| } |
| |
| @Override |
| public void onImageSaved(@NonNull File file) { |
| report("Picture saved to " + file.getAbsolutePath()); |
| |
| // Print out metadata about the picture |
| // TODO: Print out metadata to log once metadata is implemented |
| |
| broadcastPicture(file); |
| } |
| |
| @Override |
| public void onVideoSaved(@NonNull File file) { |
| report("Video saved to " + file.getAbsolutePath()); |
| broadcastVideo(file); |
| } |
| |
| @Override |
| public void onError(@NonNull ImageCaptureError imageCaptureError, @NonNull String message, |
| @Nullable Throwable cause) { |
| report("Failure"); |
| } |
| |
| @Override |
| public void onError( |
| @NonNull VideoCapture.VideoCaptureError videoCaptureError, |
| @NonNull String message, |
| @Nullable Throwable cause) { |
| report("Failure"); |
| } |
| |
| private void report(String msg) { |
| Log.d(TAG, msg); |
| Toast.makeText(mCameraView.getContext(), msg, Toast.LENGTH_SHORT).show(); |
| } |
| |
| private void broadcastPicture(File file) { |
| if (Build.VERSION.SDK_INT < 24) { |
| Intent intent = new Intent(Camera.ACTION_NEW_PICTURE); |
| intent.setData(Uri.fromFile(file)); |
| mCameraView.getContext().sendBroadcast(intent); |
| } else { |
| Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE); |
| intent.setData(Uri.fromFile(file)); |
| mCameraView.getContext().sendBroadcast(intent); |
| } |
| } |
| |
| private void broadcastVideo(File file) { |
| if (Build.VERSION.SDK_INT < 24) { |
| Intent intent = new Intent(Camera.ACTION_NEW_VIDEO); |
| intent.setData(Uri.fromFile(file)); |
| mCameraView.getContext().sendBroadcast(intent); |
| } else { |
| Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE); |
| intent.setData(Uri.fromFile(file)); |
| mCameraView.getContext().sendBroadcast(intent); |
| } |
| } |
| } |
