Merge "[LeAudio] Move the QrCamera and decorateView from Settings to SettingsLib for Wifi and BT" am: 1a4b945fc4
Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2107988
Change-Id: I68b8574f60c544310ac7f0c427c573215b77ad49
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
diff --git a/packages/SettingsLib/res/values/colors.xml b/packages/SettingsLib/res/values/colors.xml
index 5e8779f..764a324 100644
--- a/packages/SettingsLib/res/values/colors.xml
+++ b/packages/SettingsLib/res/values/colors.xml
@@ -39,4 +39,12 @@
<color name="dark_mode_icon_color_single_tone">#99000000</color>
<color name="light_mode_icon_color_single_tone">#ffffff</color>
+
+ <color name="user_avatar_color_bg">?android:attr/colorBackgroundFloating</color>
+
+ <!-- QR code scanner colors -->
+ <color name="qr_corner_line_color">#ffdadce0</color>
+ <color name="qr_focused_corner_line_color">#ff1a73e8</color>
+ <color name="qr_background_color">#b3ffffff</color> <!-- 70% white transparency -->
+ <!-- End of QR code scanner colors -->
</resources>
diff --git a/packages/SettingsLib/src/com/android/settingslib/qrcode/QrCamera.java b/packages/SettingsLib/src/com/android/settingslib/qrcode/QrCamera.java
new file mode 100644
index 0000000..364f466
--- /dev/null
+++ b/packages/SettingsLib/src/com/android/settingslib/qrcode/QrCamera.java
@@ -0,0 +1,478 @@
+/*
+ * Copyright (C) 2022 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.android.settingslib.qrcode;
+
+import android.content.Context;
+import android.content.res.Configuration;
+import android.graphics.Matrix;
+import android.graphics.Rect;
+import android.graphics.SurfaceTexture;
+import android.hardware.Camera;
+import android.os.AsyncTask;
+import android.os.Handler;
+import android.os.Message;
+import android.util.ArrayMap;
+import android.util.Log;
+import android.util.Size;
+import android.view.Surface;
+import android.view.WindowManager;
+
+import androidx.annotation.VisibleForTesting;
+
+import com.google.zxing.BarcodeFormat;
+import com.google.zxing.BinaryBitmap;
+import com.google.zxing.DecodeHintType;
+import com.google.zxing.MultiFormatReader;
+import com.google.zxing.ReaderException;
+import com.google.zxing.Result;
+import com.google.zxing.common.HybridBinarizer;
+
+import java.io.IOException;
+import java.lang.ref.WeakReference;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Semaphore;
+
+public class QrCamera extends Handler {
+ private static final String TAG = "QrCamera";
+
+ private static final int MSG_AUTO_FOCUS = 1;
+
+ /**
+ * The max allowed difference between picture size ratio and preview size ratio.
+ * Uses to filter the picture sizes of similar preview size ratio, for example, if a preview
+ * size is 1920x1440, MAX_RATIO_DIFF 0.1 could allow picture size of 720x480 or 352x288 or
+ * 176x44 but not 1920x1080.
+ */
+ private static final double MAX_RATIO_DIFF = 0.1;
+
+ private static final long AUTOFOCUS_INTERVAL_MS = 1500L;
+
+ private static Map<DecodeHintType, List<BarcodeFormat>> HINTS = new ArrayMap<>();
+ private static List<BarcodeFormat> FORMATS = new ArrayList<>();
+
+ static {
+ FORMATS.add(BarcodeFormat.QR_CODE);
+ HINTS.put(DecodeHintType.POSSIBLE_FORMATS, FORMATS);
+ }
+
+ @VisibleForTesting
+ Camera mCamera;
+ private Size mPreviewSize;
+ private WeakReference<Context> mContext;
+ private ScannerCallback mScannerCallback;
+ private MultiFormatReader mReader;
+ private DecodingTask mDecodeTask;
+ private int mCameraOrientation;
+ @VisibleForTesting
+ Camera.Parameters mParameters;
+
+ public QrCamera(Context context, ScannerCallback callback) {
+ mContext = new WeakReference<Context>(context);
+ mScannerCallback = callback;
+ mReader = new MultiFormatReader();
+ mReader.setHints(HINTS);
+ }
+
+ /**
+ * The function start camera preview and capture pictures to decode QR code continuously in a
+ * background task.
+ *
+ * @param surface The surface to be used for live preview.
+ */
+ public void start(SurfaceTexture surface) {
+ if (mDecodeTask == null) {
+ mDecodeTask = new DecodingTask(surface);
+ // Execute in the separate thread pool to prevent block other AsyncTask.
+ mDecodeTask.executeOnExecutor(Executors.newSingleThreadExecutor());
+ }
+ }
+
+ /**
+ * The function stop camera preview and background decode task. Caller call this function when
+ * the surface is being destroyed.
+ */
+ public void stop() {
+ removeMessages(MSG_AUTO_FOCUS);
+ if (mDecodeTask != null) {
+ mDecodeTask.cancel(true);
+ mDecodeTask = null;
+ }
+ if (mCamera != null) {
+ mCamera.stopPreview();
+ releaseCamera();
+ }
+ }
+
+ /** The scanner which includes this QrCodeCamera class should implement this */
+ public interface ScannerCallback {
+
+ /**
+ * The function used to handle the decoding result of the QR code.
+ *
+ * @param result the result QR code after decoding.
+ */
+ void handleSuccessfulResult(String result);
+
+ /** Request the QR code scanner to handle the failure happened. */
+ void handleCameraFailure();
+
+ /**
+ * The function used to get the background View size.
+ *
+ * @return Includes the background view size.
+ */
+ Size getViewSize();
+
+ /**
+ * The function used to get the frame position inside the view
+ *
+ * @param previewSize Is the preview size set by camera
+ * @param cameraOrientation Is the orientation of current Camera
+ * @return The rectangle would like to crop from the camera preview shot.
+ */
+ Rect getFramePosition(Size previewSize, int cameraOrientation);
+
+ /**
+ * Sets the transform to associate with preview area.
+ *
+ * @param transform The transform to apply to the content of preview
+ */
+ void setTransform(Matrix transform);
+
+ /**
+ * Verify QR code is valid or not. The camera will stop scanning if this callback returns
+ * true.
+ *
+ * @param qrCode The result QR code after decoding.
+ * @return Returns true if qrCode hold valid information.
+ */
+ boolean isValid(String qrCode);
+ }
+
+ @VisibleForTesting
+ void setCameraParameter() {
+ mParameters = mCamera.getParameters();
+ mPreviewSize = getBestPreviewSize(mParameters);
+ mParameters.setPreviewSize(mPreviewSize.getWidth(), mPreviewSize.getHeight());
+ Size pictureSize = getBestPictureSize(mParameters);
+ mParameters.setPictureSize(pictureSize.getWidth(), pictureSize.getHeight());
+
+ final List<String> supportedFlashModes = mParameters.getSupportedFlashModes();
+ if (supportedFlashModes != null &&
+ supportedFlashModes.contains(Camera.Parameters.FLASH_MODE_OFF)) {
+ mParameters.setFlashMode(Camera.Parameters.FLASH_MODE_OFF);
+ }
+
+ final List<String> supportedFocusModes = mParameters.getSupportedFocusModes();
+ if (supportedFocusModes.contains(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE)) {
+ mParameters.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);
+ } else if (supportedFocusModes.contains(Camera.Parameters.FOCUS_MODE_AUTO)) {
+ mParameters.setFocusMode(Camera.Parameters.FOCUS_MODE_AUTO);
+ }
+ mCamera.setParameters(mParameters);
+ }
+
+ private boolean startPreview() {
+ if (mContext.get() == null) {
+ return false;
+ }
+
+ final WindowManager winManager =
+ (WindowManager) mContext.get().getSystemService(Context.WINDOW_SERVICE);
+ final int rotation = winManager.getDefaultDisplay().getRotation();
+ int degrees = 0;
+ switch (rotation) {
+ case Surface.ROTATION_0:
+ degrees = 0;
+ break;
+ case Surface.ROTATION_90:
+ degrees = 90;
+ break;
+ case Surface.ROTATION_180:
+ degrees = 180;
+ break;
+ case Surface.ROTATION_270:
+ degrees = 270;
+ break;
+ }
+ final int rotateDegrees = (mCameraOrientation - degrees + 360) % 360;
+ mCamera.setDisplayOrientation(rotateDegrees);
+ mCamera.startPreview();
+ if (Camera.Parameters.FOCUS_MODE_AUTO.equals(mParameters.getFocusMode())) {
+ mCamera.autoFocus(/* Camera.AutoFocusCallback */ null);
+ sendMessageDelayed(obtainMessage(MSG_AUTO_FOCUS), AUTOFOCUS_INTERVAL_MS);
+ }
+ return true;
+ }
+
+ private class DecodingTask extends AsyncTask<Void, Void, String> {
+ private QrYuvLuminanceSource mImage;
+ private SurfaceTexture mSurface;
+
+ private DecodingTask(SurfaceTexture surface) {
+ mSurface = surface;
+ }
+
+ @Override
+ protected String doInBackground(Void... tmp) {
+ if (!initCamera(mSurface)) {
+ return null;
+ }
+
+ final Semaphore imageGot = new Semaphore(0);
+ while (true) {
+ // This loop will try to capture preview image continuously until a valid QR Code
+ // decoded. The caller can also call {@link #stop()} to interrupts scanning loop.
+ mCamera.setOneShotPreviewCallback(
+ (imageData, camera) -> {
+ mImage = getFrameImage(imageData);
+ imageGot.release();
+ });
+ try {
+ // Semaphore.acquire() blocking until permit is available, or the thread is
+ // interrupted.
+ imageGot.acquire();
+ Result qrCode = null;
+ try {
+ qrCode =
+ mReader.decodeWithState(
+ new BinaryBitmap(new HybridBinarizer(mImage)));
+ } catch (ReaderException e) {
+ // No logging since every time the reader cannot decode the
+ // image, this ReaderException will be thrown.
+ } finally {
+ mReader.reset();
+ }
+ if (qrCode != null) {
+ if (mScannerCallback.isValid(qrCode.getText())) {
+ return qrCode.getText();
+ }
+ }
+ } catch (InterruptedException e) {
+ Thread.currentThread().interrupt();
+ return null;
+ }
+ }
+ }
+
+ @Override
+ protected void onPostExecute(String qrCode) {
+ if (qrCode != null) {
+ mScannerCallback.handleSuccessfulResult(qrCode);
+ }
+ }
+
+ private boolean initCamera(SurfaceTexture surface) {
+ final int numberOfCameras = Camera.getNumberOfCameras();
+ Camera.CameraInfo cameraInfo = new Camera.CameraInfo();
+ try {
+ for (int i = 0; i < numberOfCameras; ++i) {
+ Camera.getCameraInfo(i, cameraInfo);
+ if (cameraInfo.facing == Camera.CameraInfo.CAMERA_FACING_BACK) {
+ releaseCamera();
+ mCamera = Camera.open(i);
+ mCameraOrientation = cameraInfo.orientation;
+ break;
+ }
+ }
+ if (mCamera == null && numberOfCameras > 0) {
+ Log.i(TAG, "Can't find back camera. Opening a different camera");
+ Camera.getCameraInfo(0, cameraInfo);
+ releaseCamera();
+ mCamera = Camera.open(0);
+ mCameraOrientation = cameraInfo.orientation;
+ }
+ } catch (RuntimeException e) {
+ Log.e(TAG, "Fail to open camera: " + e);
+ mCamera = null;
+ mScannerCallback.handleCameraFailure();
+ return false;
+ }
+
+ try {
+ if (mCamera == null) {
+ throw new IOException("Cannot find available camera");
+ }
+ mCamera.setPreviewTexture(surface);
+ setCameraParameter();
+ setTransformationMatrix();
+ if (!startPreview()) {
+ throw new IOException("Lost contex");
+ }
+ } catch (IOException ioe) {
+ Log.e(TAG, "Fail to startPreview camera: " + ioe);
+ mCamera = null;
+ mScannerCallback.handleCameraFailure();
+ return false;
+ }
+ return true;
+ }
+ }
+
+ private void releaseCamera() {
+ if (mCamera != null) {
+ mCamera.release();
+ mCamera = null;
+ }
+ }
+
+ /** Set transform matrix to crop and center the preview picture */
+ private void setTransformationMatrix() {
+ final boolean isPortrait = mContext.get().getResources().getConfiguration().orientation
+ == Configuration.ORIENTATION_PORTRAIT;
+
+ final int previewWidth = isPortrait ? mPreviewSize.getWidth() : mPreviewSize.getHeight();
+ final int previewHeight = isPortrait ? mPreviewSize.getHeight() : mPreviewSize.getWidth();
+ final float ratioPreview = (float) getRatio(previewWidth, previewHeight);
+
+ // Calculate transformation matrix.
+ float scaleX = 1.0f;
+ float scaleY = 1.0f;
+ if (previewWidth > previewHeight) {
+ scaleY = scaleX / ratioPreview;
+ } else {
+ scaleX = scaleY / ratioPreview;
+ }
+
+ // Set the transform matrix.
+ final Matrix matrix = new Matrix();
+ matrix.setScale(scaleX, scaleY);
+ mScannerCallback.setTransform(matrix);
+ }
+
+ private QrYuvLuminanceSource getFrameImage(byte[] imageData) {
+ final Rect frame = mScannerCallback.getFramePosition(mPreviewSize, mCameraOrientation);
+ final QrYuvLuminanceSource image = new QrYuvLuminanceSource(imageData,
+ mPreviewSize.getWidth(), mPreviewSize.getHeight());
+ return (QrYuvLuminanceSource)
+ image.crop(frame.left, frame.top, frame.width(), frame.height());
+ }
+
+ @Override
+ public void handleMessage(Message msg) {
+ switch (msg.what) {
+ case MSG_AUTO_FOCUS:
+ // Calling autoFocus(null) will only trigger the camera to focus once. In order
+ // to make the camera continuously auto focus during scanning, need to periodically
+ // trigger it.
+ mCamera.autoFocus(/* Camera.AutoFocusCallback */ null);
+ sendMessageDelayed(obtainMessage(MSG_AUTO_FOCUS), AUTOFOCUS_INTERVAL_MS);
+ break;
+ default:
+ Log.d(TAG, "Unexpected Message: " + msg.what);
+ }
+ }
+
+ /**
+ * Get best preview size from the list of camera supported preview sizes. Compares the
+ * preview size and aspect ratio to choose the best one.
+ */
+ private Size getBestPreviewSize(Camera.Parameters parameters) {
+ final double minRatioDiffPercent = 0.1;
+ final Size windowSize = mScannerCallback.getViewSize();
+ final double winRatio = getRatio(windowSize.getWidth(), windowSize.getHeight());
+ double bestChoiceRatio = 0;
+ Size bestChoice = new Size(0, 0);
+ for (Camera.Size size : parameters.getSupportedPreviewSizes()) {
+ double ratio = getRatio(size.width, size.height);
+ if (size.height * size.width > bestChoice.getWidth() * bestChoice.getHeight()
+ && (Math.abs(bestChoiceRatio - winRatio) / winRatio > minRatioDiffPercent
+ || Math.abs(ratio - winRatio) / winRatio <= minRatioDiffPercent)) {
+ bestChoice = new Size(size.width, size.height);
+ bestChoiceRatio = getRatio(size.width, size.height);
+ }
+ }
+ return bestChoice;
+ }
+
+ /**
+ * Get best picture size from the list of camera supported picture sizes. Compares the
+ * picture size and aspect ratio to choose the best one.
+ */
+ private Size getBestPictureSize(Camera.Parameters parameters) {
+ final Camera.Size previewSize = parameters.getPreviewSize();
+ final double previewRatio = getRatio(previewSize.width, previewSize.height);
+ List<Size> bestChoices = new ArrayList<>();
+ final List<Size> similarChoices = new ArrayList<>();
+
+ // Filter by ratio
+ for (Camera.Size size : parameters.getSupportedPictureSizes()) {
+ double ratio = getRatio(size.width, size.height);
+ if (ratio == previewRatio) {
+ bestChoices.add(new Size(size.width, size.height));
+ } else if (Math.abs(ratio - previewRatio) < MAX_RATIO_DIFF) {
+ similarChoices.add(new Size(size.width, size.height));
+ }
+ }
+
+ if (bestChoices.size() == 0 && similarChoices.size() == 0) {
+ Log.d(TAG, "No proper picture size, return default picture size");
+ Camera.Size defaultPictureSize = parameters.getPictureSize();
+ return new Size(defaultPictureSize.width, defaultPictureSize.height);
+ }
+
+ if (bestChoices.size() == 0) {
+ bestChoices = similarChoices;
+ }
+
+ // Get the best by area
+ int bestAreaDifference = Integer.MAX_VALUE;
+ Size bestChoice = null;
+ final int previewArea = previewSize.width * previewSize.height;
+ for (Size size : bestChoices) {
+ int areaDifference = Math.abs(size.getWidth() * size.getHeight() - previewArea);
+ if (areaDifference < bestAreaDifference) {
+ bestAreaDifference = areaDifference;
+ bestChoice = size;
+ }
+ }
+ return bestChoice;
+ }
+
+ private double getRatio(double x, double y) {
+ return (x < y) ? x / y : y / x;
+ }
+
+ @VisibleForTesting
+ protected void decodeImage(BinaryBitmap image) {
+ Result qrCode = null;
+
+ try {
+ qrCode = mReader.decodeWithState(image);
+ } catch (ReaderException e) {
+ } finally {
+ mReader.reset();
+ }
+
+ if (qrCode != null) {
+ mScannerCallback.handleSuccessfulResult(qrCode.getText());
+ }
+ }
+
+ /**
+ * After {@link #start(SurfaceTexture)}, DecodingTask runs continuously to capture images and
+ * decode QR code. DecodingTask become null After {@link #stop()}.
+ *
+ * Uses this method in test case to prevent power consumption problem.
+ */
+ public boolean isDecodeTaskAlive() {
+ return mDecodeTask != null;
+ }
+}
diff --git a/packages/SettingsLib/src/com/android/settingslib/qrcode/QrDecorateView.java b/packages/SettingsLib/src/com/android/settingslib/qrcode/QrDecorateView.java
new file mode 100644
index 0000000..7005d36
--- /dev/null
+++ b/packages/SettingsLib/src/com/android/settingslib/qrcode/QrDecorateView.java
@@ -0,0 +1,140 @@
+/*
+ * Copyright (C) 2022 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.android.settingslib.qrcode;
+
+import android.content.Context;
+import android.graphics.Bitmap;
+import android.graphics.Canvas;
+import android.graphics.Paint;
+import android.graphics.PorterDuff;
+import android.graphics.PorterDuffXfermode;
+import android.graphics.RectF;
+import android.util.AttributeSet;
+import android.util.TypedValue;
+import android.view.View;
+
+import com.android.settingslib.R;
+
+public class QrDecorateView extends View {
+ private static final float CORNER_STROKE_WIDTH = 4f; // 4dp
+ private static final float CORNER_LINE_LENGTH = 264f; // 264dp
+ private static final float CORNER_RADIUS = 16f; // 16dp
+
+ final private int mCornerColor;
+ final private int mFocusedCornerColor;
+ final private int mBackgroundColor;
+
+ final private Paint mStrokePaint;
+ final private Paint mTransparentPaint;
+ final private Paint mBackgroundPaint;
+
+ final private float mRadius;
+ final private float mInnerRidus;
+
+ private Bitmap mMaskBitmap;
+ private Canvas mMaskCanvas;
+
+ private RectF mOuterFrame;
+ private RectF mInnerFrame;
+
+ private boolean mFocused;
+
+ public QrDecorateView(Context context) {
+ this(context, null);
+ }
+
+ public QrDecorateView(Context context, AttributeSet attrs) {
+ this(context, attrs, 0);
+ }
+
+ public QrDecorateView(Context context, AttributeSet attrs, int defStyleAttr) {
+ this(context, attrs, defStyleAttr, 0);
+ }
+
+ public QrDecorateView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
+ super(context, attrs, defStyleAttr, defStyleRes);
+
+ mFocused = false;
+ mRadius = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, CORNER_RADIUS,
+ getResources().getDisplayMetrics());
+ // Inner radius needs to minus stroke width for keeping the width of border consistent.
+ mInnerRidus = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,
+ CORNER_RADIUS - CORNER_STROKE_WIDTH, getResources().getDisplayMetrics());
+
+ mCornerColor = context.getResources().getColor(R.color.qr_corner_line_color);
+ mFocusedCornerColor = context.getResources().getColor(R.color.qr_focused_corner_line_color);
+ mBackgroundColor = context.getResources().getColor(R.color.qr_background_color);
+
+ mStrokePaint = new Paint();
+ mStrokePaint.setAntiAlias(true);
+
+ mTransparentPaint = new Paint();
+ mTransparentPaint.setAntiAlias(true);
+ mTransparentPaint.setColor(getResources().getColor(android.R.color.transparent));
+ mTransparentPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.CLEAR));
+
+ mBackgroundPaint = new Paint();
+ mBackgroundPaint.setColor(mBackgroundColor);
+ }
+
+ @Override
+ protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
+ super.onLayout(changed, left, top, right, bottom);
+
+ if(mMaskBitmap == null) {
+ mMaskBitmap = Bitmap.createBitmap(getWidth(), getHeight(), Bitmap.Config.ARGB_8888);
+ mMaskCanvas = new Canvas(mMaskBitmap);
+ }
+
+ calculateFramePos();
+ }
+
+ @Override
+ protected void onDraw(Canvas canvas) {
+ // Set frame line color.
+ mStrokePaint.setColor(mFocused ? mFocusedCornerColor : mCornerColor);
+ // Draw background color.
+ mMaskCanvas.drawColor(mBackgroundColor);
+ // Draw outer corner.
+ mMaskCanvas.drawRoundRect(mOuterFrame, mRadius, mRadius, mStrokePaint);
+ // Draw inner transparent corner.
+ mMaskCanvas.drawRoundRect(mInnerFrame, mInnerRidus, mInnerRidus, mTransparentPaint);
+
+ canvas.drawBitmap(mMaskBitmap, 0, 0, mBackgroundPaint);
+ super.onDraw(canvas);
+ }
+
+ private void calculateFramePos() {
+ final int centralX = getWidth() / 2;
+ final int centralY = getHeight() / 2;
+ final float cornerLineLength = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,
+ CORNER_LINE_LENGTH, getResources().getDisplayMetrics()) / 2;
+ final float strokeWidth = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,
+ CORNER_STROKE_WIDTH, getResources().getDisplayMetrics());
+
+ mOuterFrame = new RectF(centralX - cornerLineLength, centralY - cornerLineLength,
+ centralX + cornerLineLength, centralY + cornerLineLength);
+ mInnerFrame = new RectF(mOuterFrame.left + strokeWidth, mOuterFrame.top + strokeWidth,
+ mOuterFrame.right - strokeWidth, mOuterFrame.bottom - strokeWidth);
+ }
+
+ // Draws green lines if focused. Otherwise, draws white lines.
+ public void setFocused(boolean focused) {
+ mFocused = focused;
+ invalidate();
+ }
+}
diff --git a/packages/SettingsLib/src/com/android/settingslib/qrcode/QrYuvLuminanceSource.java b/packages/SettingsLib/src/com/android/settingslib/qrcode/QrYuvLuminanceSource.java
new file mode 100644
index 0000000..421cf5c
--- /dev/null
+++ b/packages/SettingsLib/src/com/android/settingslib/qrcode/QrYuvLuminanceSource.java
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2022 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.android.settingslib.qrcode;
+
+import com.google.zxing.LuminanceSource;
+
+public class QrYuvLuminanceSource extends LuminanceSource {
+
+ private byte[] mYuvData;
+ private int mWidth;
+ private int mHeight;
+
+ public QrYuvLuminanceSource(byte[] yuvData, int width, int height) {
+ super(width, height);
+
+ mWidth = width;
+ mHeight = height;
+ mYuvData = yuvData;
+ }
+
+ @Override
+ public boolean isCropSupported() {
+ return true;
+ }
+
+ @Override
+ public LuminanceSource crop(int left, int top, int crop_width, int crop_height) {
+ final byte[] newImage = new byte[crop_width * crop_height];
+ int inputOffset = top * mWidth + left;
+
+ if (left + crop_width > mWidth || top + crop_height > mHeight) {
+ throw new IllegalArgumentException("cropped rectangle does not fit within image data.");
+ }
+
+ for (int y = 0; y < crop_height; y++) {
+ System.arraycopy(mYuvData, inputOffset, newImage, y * crop_width, crop_width);
+ inputOffset += mWidth;
+ }
+ return new QrYuvLuminanceSource(newImage, crop_width, crop_height);
+ }
+
+ @Override
+ public byte[] getRow(int y, byte[] row) {
+ if (y < 0 || y >= mHeight) {
+ throw new IllegalArgumentException("Requested row is outside the image: " + y);
+ }
+ if (row == null || row.length < mWidth) {
+ row = new byte[mWidth];
+ }
+ System.arraycopy(mYuvData, y * mWidth, row, 0, mWidth);
+ return row;
+ }
+
+ @Override
+ public byte[] getMatrix() {
+ return mYuvData;
+ }
+}