package com.yalantis.ucrop.task;
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import android.content.Context;
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import android.graphics.Bitmap;
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import android.graphics.Matrix;
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import android.graphics.RectF;
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import android.media.ExifInterface;
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import android.net.Uri;
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import android.os.AsyncTask;
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import android.os.Build;
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import android.os.ParcelFileDescriptor;
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import android.util.Log;
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import androidx.annotation.NonNull;
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import androidx.annotation.Nullable;
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import com.yalantis.ucrop.callback.BitmapCropCallback;
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import com.yalantis.ucrop.model.CropParameters;
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import com.yalantis.ucrop.model.ExifInfo;
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import com.yalantis.ucrop.model.ImageState;
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import com.yalantis.ucrop.util.BitmapLoadUtils;
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import com.yalantis.ucrop.util.FileUtils;
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import com.yalantis.ucrop.util.ImageHeaderParser;
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import java.io.File;
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import java.io.FileDescriptor;
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import java.io.FileInputStream;
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import java.io.FileNotFoundException;
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import java.io.IOException;
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import java.io.OutputStream;
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import java.lang.ref.WeakReference;
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/**
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* Crops part of image that fills the crop bounds.
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* <p/>
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* First image is downscaled if max size was set and if resulting image is larger that max size.
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* Then image is rotated accordingly.
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* Finally new Bitmap object is created and saved to file.
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*/
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public class BitmapCropTask extends AsyncTask<Void, Void, Throwable> {
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private static final String TAG = "BitmapCropTask";
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private final WeakReference<Context> mContext;
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private Bitmap mViewBitmap;
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private final RectF mCropRect;
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private final RectF mCurrentImageRect;
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private float mCurrentScale, mCurrentAngle;
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private final int mMaxResultImageSizeX, mMaxResultImageSizeY;
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private final Bitmap.CompressFormat mCompressFormat;
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private final int mCompressQuality;
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private final Uri mImageInputUri;
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private final String mImageOutputPath;
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private final ExifInfo mExifInfo;
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private final BitmapCropCallback mCropCallback;
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private int mCroppedImageWidth, mCroppedImageHeight;
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private int cropOffsetX, cropOffsetY;
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public BitmapCropTask(@NonNull Context context, @Nullable Bitmap viewBitmap, @NonNull ImageState imageState, @NonNull CropParameters cropParameters,
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@Nullable BitmapCropCallback cropCallback) {
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mContext = new WeakReference<>(context);
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mViewBitmap = viewBitmap;
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mCropRect = imageState.getCropRect();
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mCurrentImageRect = imageState.getCurrentImageRect();
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mCurrentScale = imageState.getCurrentScale();
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mCurrentAngle = imageState.getCurrentAngle();
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mMaxResultImageSizeX = cropParameters.getMaxResultImageSizeX();
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mMaxResultImageSizeY = cropParameters.getMaxResultImageSizeY();
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mCompressFormat = cropParameters.getCompressFormat();
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mCompressQuality = cropParameters.getCompressQuality();
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mImageInputUri = cropParameters.getImageInputUri();
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mImageOutputPath = cropParameters.getImageOutputPath();
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mExifInfo = cropParameters.getExifInfo();
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mCropCallback = cropCallback;
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}
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@Override
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@Nullable
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protected Throwable doInBackground(Void... params) {
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if (mViewBitmap == null) {
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return new NullPointerException("ViewBitmap is null");
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} else if (mViewBitmap.isRecycled()) {
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return new NullPointerException("ViewBitmap is recycled");
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} else if (mCurrentImageRect.isEmpty()) {
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return new NullPointerException("CurrentImageRect is empty");
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}
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try {
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crop();
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mViewBitmap = null;
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} catch (Throwable throwable) {
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return throwable;
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}
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return null;
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}
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private boolean crop() throws IOException {
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// Downsize if needed
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if (mMaxResultImageSizeX > 0 && mMaxResultImageSizeY > 0) {
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float cropWidth = mCropRect.width() / mCurrentScale;
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float cropHeight = mCropRect.height() / mCurrentScale;
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if (cropWidth > mMaxResultImageSizeX || cropHeight > mMaxResultImageSizeY) {
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float scaleX = mMaxResultImageSizeX / cropWidth;
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float scaleY = mMaxResultImageSizeY / cropHeight;
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float resizeScale = Math.min(scaleX, scaleY);
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Bitmap resizedBitmap = Bitmap.createScaledBitmap(mViewBitmap,
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Math.round(mViewBitmap.getWidth() * resizeScale),
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Math.round(mViewBitmap.getHeight() * resizeScale), false);
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if (mViewBitmap != resizedBitmap) {
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mViewBitmap.recycle();
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}
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mViewBitmap = resizedBitmap;
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mCurrentScale /= resizeScale;
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}
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}
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// Rotate if needed
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if (mCurrentAngle != 0) {
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Matrix tempMatrix = new Matrix();
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tempMatrix.setRotate(mCurrentAngle, mViewBitmap.getWidth() / 2, mViewBitmap.getHeight() / 2);
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Bitmap rotatedBitmap = Bitmap.createBitmap(mViewBitmap, 0, 0, mViewBitmap.getWidth(), mViewBitmap.getHeight(),
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tempMatrix, true);
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if (mViewBitmap != rotatedBitmap) {
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mViewBitmap.recycle();
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}
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mViewBitmap = rotatedBitmap;
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}
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cropOffsetX = Math.round((mCropRect.left - mCurrentImageRect.left) / mCurrentScale);
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cropOffsetY = Math.round((mCropRect.top - mCurrentImageRect.top) / mCurrentScale);
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mCroppedImageWidth = Math.round(mCropRect.width() / mCurrentScale);
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mCroppedImageHeight = Math.round(mCropRect.height() / mCurrentScale);
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boolean shouldCrop = shouldCrop(mCroppedImageWidth, mCroppedImageHeight);
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Log.i(TAG, "Should crop: " + shouldCrop);
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boolean isAndroidQ = Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q;
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if (shouldCrop) {
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ExifInterface originalExif;
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if (isAndroidQ && android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.N) {
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ParcelFileDescriptor parcelFileDescriptor =
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mContext.get().getContentResolver().openFileDescriptor(mImageInputUri, "r");
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FileInputStream inputStream = new FileInputStream(parcelFileDescriptor.getFileDescriptor());
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originalExif = new ExifInterface(inputStream);
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} else {
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originalExif = new ExifInterface(mImageInputUri.getPath());
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}
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saveImage(Bitmap.createBitmap(mViewBitmap, cropOffsetX, cropOffsetY, mCroppedImageWidth, mCroppedImageHeight));
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if (mCompressFormat.equals(Bitmap.CompressFormat.JPEG)) {
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ImageHeaderParser.copyExif(originalExif, mCroppedImageWidth, mCroppedImageHeight, mImageOutputPath);
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}
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return true;
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} else {
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if (isAndroidQ && mImageInputUri.toString().startsWith("content://")) {
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ParcelFileDescriptor parcelFileDescriptor =
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mContext.get().getContentResolver().openFileDescriptor(mImageInputUri, "r");
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FileDescriptor fileDescriptor = parcelFileDescriptor.getFileDescriptor();
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FileInputStream inputStream = new FileInputStream(fileDescriptor);
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FileUtils.copyFile(inputStream, mImageOutputPath);
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} else {
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FileUtils.copyFile(mImageInputUri.getPath(), mImageOutputPath);
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}
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return true;
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}
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}
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private void saveImage(@NonNull Bitmap croppedBitmap) throws FileNotFoundException {
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Context context = mContext.get();
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if (context == null) {
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return;
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}
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OutputStream outputStream = null;
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try {
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outputStream = context.getContentResolver().openOutputStream(Uri.fromFile(new File(mImageOutputPath)));
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croppedBitmap.compress(mCompressFormat, mCompressQuality, outputStream);
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croppedBitmap.recycle();
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} finally {
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BitmapLoadUtils.close(outputStream);
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}
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}
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/**
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* Check whether an image should be cropped at all or just file can be copied to the destination path.
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* For each 1000 pixels there is one pixel of error due to matrix calculations etc.
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*
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* @param width - crop area width
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* @param height - crop area height
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* @return - true if image must be cropped, false - if original image fits requirements
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*/
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private boolean shouldCrop(int width, int height) {
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int pixelError = 1;
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pixelError += Math.round(Math.max(width, height) / 1000f);
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return (mMaxResultImageSizeX > 0 && mMaxResultImageSizeY > 0)
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|| Math.abs(mCropRect.left - mCurrentImageRect.left) > pixelError
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|| Math.abs(mCropRect.top - mCurrentImageRect.top) > pixelError
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|| Math.abs(mCropRect.bottom - mCurrentImageRect.bottom) > pixelError
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|| Math.abs(mCropRect.right - mCurrentImageRect.right) > pixelError;
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}
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@Override
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protected void onPostExecute(@Nullable Throwable t) {
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if (mCropCallback != null) {
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if (t == null) {
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Uri uri = Uri.fromFile(new File(mImageOutputPath));
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mCropCallback.onBitmapCropped(uri, cropOffsetX, cropOffsetY, mCroppedImageWidth, mCroppedImageHeight);
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} else {
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mCropCallback.onCropFailure(t);
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}
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}
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}
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}
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