mirror of
https://github.com/scratchfoundation/scratchjr.git
synced 2024-11-28 18:15:37 -05:00
Android: upgrade to camera2
This commit is contained in:
Yueyu
parent
f226f3fdc4
commit
29d6a92ee8
5 changed files with 341 additions and 15 deletions
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@ -26,6 +26,11 @@ android {
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versionName "1.2.11"
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}
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}
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compileOptions {
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sourceCompatibility JavaVersion.VERSION_1_8
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targetCompatibility JavaVersion.VERSION_1_8
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}
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}
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dependencies {
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@ -33,7 +38,15 @@ dependencies {
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implementation 'com.google.firebase:firebase-core:17.2.0'
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implementation 'com.google.firebase:firebase-analytics:17.2.0'
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implementation 'com.google.android.gms:play-services-location:17.0.0'
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implementation 'androidx.appcompat:appcompat:1.1.0'
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implementation 'androidx.appcompat:appcompat:1.3.0'
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def camerax_version = "1.0.0-rc05"
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// CameraX core library using camera2 implementation
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implementation "androidx.camera:camera-camera2:$camerax_version"
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// CameraX Lifecycle Library
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implementation "androidx.camera:camera-lifecycle:$camerax_version"
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// CameraX View class
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implementation "androidx.camera:camera-view:1.0.0-alpha25"
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}
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def appModuleRootFolder = '.'
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@ -0,0 +1,300 @@
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package org.scratchjr.android;
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import java.nio.ByteBuffer;
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import java.util.concurrent.ExecutionException;
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import java.util.concurrent.ExecutorService;
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import java.util.concurrent.Executors;
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import android.annotation.SuppressLint;
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import android.content.Context;
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import android.graphics.Bitmap;
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import android.graphics.Bitmap.CompressFormat;
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import android.graphics.ImageFormat;
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import android.graphics.Matrix;
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import android.graphics.Rect;
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import android.graphics.RectF;
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import android.graphics.YuvImage;
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import android.hardware.display.DisplayManager;
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import android.media.Image;
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import android.util.Log;
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import android.view.Display;
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import android.view.Surface;
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import android.view.WindowManager;
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import android.widget.RelativeLayout;
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import androidx.appcompat.app.AppCompatActivity;
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import androidx.camera.core.CameraInfoUnavailableException;
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import androidx.camera.core.CameraSelector;
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import androidx.camera.core.ImageCapture;
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import androidx.camera.core.Preview;
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import androidx.camera.lifecycle.ProcessCameraProvider;
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import androidx.camera.view.PreviewView;
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import androidx.core.content.ContextCompat;
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import com.google.common.util.concurrent.ListenableFuture;
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@SuppressLint("ViewConstructor")
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public class CameraxView extends RelativeLayout {
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private static final String LOG_TAG = "ScratchJr.CameraxView";
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private final RectF _rect;
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private boolean _currentFacingFront;
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private final float _scale;
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private final AppCompatActivity _activity;
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private ProcessCameraProvider _cameraProvider;
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private final PreviewView _viewFinder;
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private Preview _preview;
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private ImageCapture _imageCapture;
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private final ExecutorService _cameraExecutor;
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private final DisplayManager _displayManager;
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private int _displayId;
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public CameraxView(AppCompatActivity context, RectF rect, float scale, boolean facingFront) {
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super(context);
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_activity = context;
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_currentFacingFront = facingFront;
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_rect = rect;
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_scale = scale;
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_viewFinder = new PreviewView(context);
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_displayManager = (DisplayManager) context.getSystemService(Context.DISPLAY_SERVICE);
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RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
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addView(_viewFinder, layoutParams);
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post(() -> {
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_displayId = _viewFinder.getDisplay().getDisplayId();
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setupCamera();
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});
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_cameraExecutor = Executors.newSingleThreadExecutor();
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}
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@Override
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protected void onAttachedToWindow() {
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super.onAttachedToWindow();
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_displayManager.registerDisplayListener(displayListener, null);
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}
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@Override
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protected void onDetachedFromWindow() {
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super.onDetachedFromWindow();
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_displayManager.unregisterDisplayListener(displayListener);
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}
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private final DisplayManager.DisplayListener displayListener = new DisplayManager.DisplayListener() {
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@Override
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public void onDisplayAdded(int displayId) {
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}
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@Override
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public void onDisplayRemoved(int displayId) {
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}
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@SuppressLint("UnsafeOptInUsageError")
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@Override
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public void onDisplayChanged(int displayId) {
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if (displayId == _displayId) {
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int rotation = _viewFinder.getDisplay().getRotation();
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if (_imageCapture != null) {
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_imageCapture.setTargetRotation(rotation);
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}
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if (_preview != null) {
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_preview.setTargetRotation(rotation);
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}
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}
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}
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};
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private void setupCamera() {
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ListenableFuture<ProcessCameraProvider> cameraProviderFuture = ProcessCameraProvider.getInstance(_activity);
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cameraProviderFuture.addListener(() -> {
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try {
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_cameraProvider = cameraProviderFuture.get();
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bindCameraUseCases();
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} catch (ExecutionException | InterruptedException e) {
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e.printStackTrace();
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}
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}, ContextCompat.getMainExecutor(_activity));
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}
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private void bindCameraUseCases() {
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int rotation = _viewFinder.getDisplay().getRotation();
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Log.d(LOG_TAG, "rotation: " + rotation);
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_imageCapture = new ImageCapture.Builder()
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.setTargetRotation(rotation)
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.build();
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_preview = new Preview.Builder()
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.setTargetRotation(rotation)
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.build();
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_cameraProvider.unbindAll();
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int lensFacing = CameraSelector.LENS_FACING_FRONT;
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if (!_currentFacingFront) {
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lensFacing = CameraSelector.LENS_FACING_BACK;
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}
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CameraSelector selector = new CameraSelector.Builder()
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.requireLensFacing(lensFacing)
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.build();
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_cameraProvider.bindToLifecycle(
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_activity,
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selector,
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_preview,
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_imageCapture
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);
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_preview.setSurfaceProvider(_viewFinder.getSurfaceProvider());
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}
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public void captureStillImage(ImageCapture.OnImageCapturedCallback callback) {
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_imageCapture.takePicture(_cameraExecutor, callback);
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}
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public boolean setCameraFacing(boolean facingFront) {
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if (_currentFacingFront != facingFront) {
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if (facingFront && !hasFrontCamera()) {
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return false;
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}
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if (!facingFront && !hasBackCamera()) {
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return false;
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}
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_currentFacingFront = facingFront;
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post(this::bindCameraUseCases);
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}
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return true;
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}
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private boolean hasBackCamera() {
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try {
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return _cameraProvider.hasCamera(CameraSelector.DEFAULT_BACK_CAMERA);
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} catch (CameraInfoUnavailableException e) {
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e.printStackTrace();
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}
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return false;
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}
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private boolean hasFrontCamera() {
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try {
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return _cameraProvider.hasCamera(CameraSelector.DEFAULT_FRONT_CAMERA);
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} catch (CameraInfoUnavailableException e) {
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e.printStackTrace();
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}
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return false;
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}
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/**
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* Take the given bitmap image from the camera and transform it to the correct
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* aspect ratio, size, and rotation.
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*
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* @return jpeg-encoded data of the transformed image.
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*/
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public byte[] getTransformedImage(Bitmap originalImage, int exifRotation) {
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Bitmap cropped = cropResizeAndRotate(originalImage, exifRotation);
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ByteArrayOutputStream bos = new ByteArrayOutputStream();
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cropped.compress(CompressFormat.JPEG, 90, bos);
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try {
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bos.close();
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} catch (IOException e) {
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// will not happen - this is a ByteArrayOutputStream
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Log.e(LOG_TAG, "IOException while closing byte array stream", e);
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}
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return bos.toByteArray();
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}
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/**
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* Crop and resize the given image to the dimensions of the rectangle for this camera view.
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* <p>
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* If the image was front-facing, also mirror horizontally.
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*/
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private Bitmap cropResizeAndRotate(Bitmap image, int exifRotation) {
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int imageWidth = image.getWidth();
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int imageHeight = image.getHeight();
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float rectWidth = _rect.width();
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float rectHeight = _rect.height();
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float newHeight = rectWidth * imageHeight / imageWidth;
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float scale = rectWidth / imageWidth;
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int offsetX = 0;
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int offsetY = (int) ((newHeight - rectHeight) / 2 * imageHeight / newHeight);
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if (newHeight < rectHeight) {
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float newWidth = rectHeight * imageWidth / imageHeight;
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scale = rectHeight / imageHeight;
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offsetY = 0;
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offsetX = (int) ((newWidth - rectWidth) / 2 * imageWidth / newWidth);
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}
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Matrix m = new Matrix();
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// Adjust the image to undo rotation done by JPEG generator
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m.postRotate(-1.0f * exifRotation);
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if (_currentFacingFront) {
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// flip bitmap horizontally since front-facing camera is mirrored
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m.preScale(-1.0f, 1.0f);
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}
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int rotation = CameraxView.findDisplayRotation(getContext(), _currentFacingFront);
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if (rotation == 180) {
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m.preScale(-1.0f, -1.0f);
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}
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m.postScale(scale / _scale, scale / _scale);
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return Bitmap.createBitmap(image, offsetX, offsetY, imageWidth - offsetX * 2, imageHeight - offsetY * 2, m, true);
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}
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// Image → JPEG
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public byte[] imageToByteArray(Image image) {
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byte[] data = null;
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if (image.getFormat() == ImageFormat.JPEG) {
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Image.Plane[] planes = image.getPlanes();
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ByteBuffer buffer = planes[0].getBuffer();
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data = new byte[buffer.capacity()];
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buffer.get(data);
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return data;
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} else if (image.getFormat() == ImageFormat.YUV_420_888) {
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data = NV21toJPEG(YUV_420_888toNV21(image),
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image.getWidth(), image.getHeight());
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}
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return data;
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}
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// YUV_420_888 → NV21
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private byte[] YUV_420_888toNV21(Image image) {
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byte[] nv21;
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ByteBuffer yBuffer = image.getPlanes()[0].getBuffer();
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ByteBuffer uBuffer = image.getPlanes()[1].getBuffer();
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ByteBuffer vBuffer = image.getPlanes()[2].getBuffer();
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int ySize = yBuffer.remaining();
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int uSize = uBuffer.remaining();
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int vSize = vBuffer.remaining();
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nv21 = new byte[ySize + uSize + vSize];
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yBuffer.get(nv21, 0, ySize);
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vBuffer.get(nv21, ySize, vSize);
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uBuffer.get(nv21, ySize + vSize, uSize);
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return nv21;
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}
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// NV21 → JPEG
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private byte[] NV21toJPEG(byte[] nv21, int width, int height) {
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ByteArrayOutputStream out = new ByteArrayOutputStream();
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YuvImage yuv = new YuvImage(nv21, ImageFormat.NV21, width, height, null);
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yuv.compressToJpeg(new Rect(0, 0, width, height), 100, out);
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return out.toByteArray();
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}
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private static int findDisplayRotation(Context context, boolean facingFront) {
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WindowManager windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
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Display display = windowManager.getDefaultDisplay();
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int r = display.getRotation();
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int rotation = (r == Surface.ROTATION_180) ? 180 : 0;
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if (facingFront) {
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rotation = (rotation + 360) % 360;
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}
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return rotation;
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}
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}
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@ -13,6 +13,7 @@ import org.json.JSONArray;
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import org.json.JSONException;
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import org.json.JSONObject;
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import android.annotation.SuppressLint;
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import android.content.Context;
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import android.content.Intent;
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import android.content.pm.PackageManager;
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@ -20,6 +21,7 @@ import android.graphics.Bitmap;
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import android.graphics.BitmapFactory;
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import android.graphics.RectF;
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import android.hardware.Camera;
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import android.media.Image;
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import android.net.Uri;
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import android.text.Html;
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import android.util.Base64;
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@ -29,6 +31,11 @@ import android.webkit.JavascriptInterface;
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import android.widget.ImageView;
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import android.widget.RelativeLayout;
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import androidx.annotation.NonNull;
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import androidx.camera.core.ImageCapture;
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import androidx.camera.core.ImageCaptureException;
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import androidx.camera.core.ImageProxy;
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/**
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* The methods in this inner class are exposed directly to JavaScript in the HTML5 pages
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* as AndroidInterface.
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@ -42,7 +49,7 @@ public class JavaScriptDirectInterface {
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private final ScratchJrActivity _activity;
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/** Current camera view, if active */
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private CameraView _cameraView;
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private CameraxView _cameraView;
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/** Current camera mask, if active */
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private ImageView _cameraMask;
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@ -410,19 +417,24 @@ public class JavaScriptDirectInterface {
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@JavascriptInterface
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public void scratchjr_captureimage(final String onCameraCaptureComplete) {
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_cameraView.captureStillImage(
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new Camera.PictureCallback() {
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public void onPictureTaken(byte[] jpegData, Camera camera) {
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_cameraView.captureStillImage(new ImageCapture.OnImageCapturedCallback() {
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@Override
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public void onCaptureSuccess(@NonNull ImageProxy imageProxy) {
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@SuppressLint("UnsafeOptInUsageError")
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Image image = imageProxy.getImage();
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if (image != null) {
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byte[] jpegData = _cameraView.imageToByteArray(image);
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sendBase64Image(onCameraCaptureComplete, jpegData);
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}
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},
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new Runnable() {
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public void run() {
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imageProxy.close();
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}
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@Override
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public void onError(@NonNull ImageCaptureException exception) {
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Log.e(LOG_TAG, "Could not capture picture");
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reportImageError(onCameraCaptureComplete);
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}
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}
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);
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});
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}
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@JavascriptInterface
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@ -493,7 +505,7 @@ public class JavaScriptDirectInterface {
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scaleRectFromCenter(maskRect, scale);
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RelativeLayout container = _activity.getContainer();
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_cameraView = new CameraView(_activity, rect, scale * devicePixelRatio, true); // always start with front-facing camera
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_cameraView = new CameraxView(_activity, rect, scale * devicePixelRatio, true); // always start with front-facing camera
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container.addView(_cameraView, new RelativeLayout.LayoutParams((int) (rect.width()), (int) (rect.height())));
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_cameraView.setX(rect.left);
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_cameraView.setY(rect.top);
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@ -15,6 +15,7 @@ import android.os.Build;
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import android.os.Bundle;
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import android.os.Handler;
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import androidx.annotation.NonNull;
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import androidx.appcompat.app.AppCompatActivity;
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import androidx.core.app.ActivityCompat;
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import androidx.core.content.ContextCompat;
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import android.util.Log;
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@ -49,7 +50,7 @@ import java.util.Vector;
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* @author markroth8
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*/
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public class ScratchJrActivity
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extends Activity
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extends AppCompatActivity
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{
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/** Milliseconds to pan when showing the soft keyboard */
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private static final int SOFT_KEYBOARD_PAN_MS = 250;
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@ -5,7 +5,7 @@
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<!-- Customize your theme here. -->
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</style>
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<style name="FullscreenTheme" parent="android:Theme.NoTitleBar">
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<style name="FullscreenTheme" parent="Theme.AppCompat.Light.NoActionBar">
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<item name="android:windowContentOverlay">@null</item>
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<item name="android:windowBackground">@null</item>
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<item name="metaButtonBarStyle">@style/ButtonBar</item>
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