Java tutorial
/******************************************************************************* * Copyright 2011, 2012 Chris Banes. * * 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 uk.co.senab.photoview; import android.content.Context; import android.graphics.Bitmap; import android.graphics.Matrix; import android.graphics.RectF; import android.graphics.drawable.Animatable; import android.graphics.drawable.Drawable; import android.net.Uri; import android.support.annotation.Nullable; import android.support.v4.content.ContextCompat; import android.util.AttributeSet; import android.view.GestureDetector; import android.widget.ImageView; import com.example.maxuan.photoutils.CustomProgressbarDrawable; import com.example.maxuan.photoutils.ImageDownloadListener; import com.example.maxuan.photoutils.PhotoUtils; import com.example.maxuan.photoutils.R; import com.facebook.common.references.CloseableReference; import com.facebook.datasource.DataSource; import com.facebook.drawee.backends.pipeline.Fresco; import com.facebook.drawee.controller.BaseControllerListener; import com.facebook.drawee.generic.GenericDraweeHierarchy; import com.facebook.drawee.generic.GenericDraweeHierarchyBuilder; import com.facebook.drawee.interfaces.DraweeController; import com.facebook.drawee.view.DraweeHolder; import com.facebook.imagepipeline.common.ResizeOptions; import com.facebook.imagepipeline.core.ImagePipeline; import com.facebook.imagepipeline.image.CloseableImage; import com.facebook.imagepipeline.image.CloseableStaticBitmap; import com.facebook.imagepipeline.image.ImageInfo; import com.facebook.imagepipeline.request.ImageRequest; import com.facebook.imagepipeline.request.ImageRequestBuilder; import uk.co.senab.photoview.PhotoViewAttacher.OnMatrixChangedListener; import uk.co.senab.photoview.PhotoViewAttacher.OnPhotoTapListener; import uk.co.senab.photoview.PhotoViewAttacher.OnViewTapListener; public class PhotoView extends ImageView implements IPhotoView, ImageDownloadListener { private PhotoViewAttacher mAttacher; private ScaleType mPendingScaleType; DraweeHolder<GenericDraweeHierarchy> mDraweeHolder; private CloseableReference<CloseableImage> imageReference = null; private ImageDownloadListener mDownloadListener = null; public PhotoView(Context context) { this(context, null); init(); } public PhotoView(Context context, AttributeSet attr) { this(context, attr, 0); init(); } public PhotoView(Context context, AttributeSet attr, int defStyle) { super(context, attr, defStyle); super.setScaleType(ScaleType.MATRIX); init(); } protected void init() { if (null == mAttacher || null == mAttacher.getImageView()) { mAttacher = new PhotoViewAttacher(this); } if (null != mPendingScaleType) { setScaleType(mPendingScaleType); mPendingScaleType = null; } if (mDraweeHolder == null) { GenericDraweeHierarchyBuilder builder = new GenericDraweeHierarchyBuilder(getResources()); GenericDraweeHierarchy hierarchy = builder .setProgressBarImage(new CustomProgressbarDrawable(mDownloadListener)) .setPressedStateOverlay(ContextCompat.getDrawable(getContext(), R.color.color_mask)) .setPlaceholderImage(ContextCompat.getDrawable(getContext(), R.color.folder_bg_gray)).build(); mDraweeHolder = DraweeHolder.create(hierarchy, getContext()); } } public void setImageDownloadListener(ImageDownloadListener mDownloadListener) { this.mDownloadListener = mDownloadListener; } /** * @deprecated use {@link #setRotationTo(float)} */ @Override public void setPhotoViewRotation(float rotationDegree) { mAttacher.setRotationTo(rotationDegree); } @Override public void setRotationTo(float rotationDegree) { mAttacher.setRotationTo(rotationDegree); } @Override public void setRotationBy(float rotationDegree) { mAttacher.setRotationBy(rotationDegree); } @Override public boolean canZoom() { return mAttacher.canZoom(); } @Override public RectF getDisplayRect() { return mAttacher.getDisplayRect(); } @Override public Matrix getDisplayMatrix() { return mAttacher.getDisplayMatrix(); } @Override public boolean setDisplayMatrix(Matrix finalRectangle) { return mAttacher.setDisplayMatrix(finalRectangle); } @Override @Deprecated public float getMinScale() { return getMinimumScale(); } @Override public float getMinimumScale() { return mAttacher.getMinimumScale(); } @Override @Deprecated public float getMidScale() { return getMediumScale(); } @Override public float getMediumScale() { return mAttacher.getMediumScale(); } @Override @Deprecated public float getMaxScale() { return getMaximumScale(); } @Override public float getMaximumScale() { return mAttacher.getMaximumScale(); } @Override public float getScale() { return mAttacher.getScale(); } @Override public ScaleType getScaleType() { return mAttacher.getScaleType(); } @Override public void setAllowParentInterceptOnEdge(boolean allow) { mAttacher.setAllowParentInterceptOnEdge(allow); } @Override @Deprecated public void setMinScale(float minScale) { setMinimumScale(minScale); } @Override public void setMinimumScale(float minimumScale) { mAttacher.setMinimumScale(minimumScale); } @Override @Deprecated public void setMidScale(float midScale) { setMediumScale(midScale); } @Override public void setMediumScale(float mediumScale) { mAttacher.setMediumScale(mediumScale); } @Override @Deprecated public void setMaxScale(float maxScale) { setMaximumScale(maxScale); } @Override public void setMaximumScale(float maximumScale) { mAttacher.setMaximumScale(maximumScale); } @Override public void setScaleLevels(float minimumScale, float mediumScale, float maximumScale) { mAttacher.setScaleLevels(minimumScale, mediumScale, maximumScale); } @Override // setImageBitmap calls through to this method public void setImageDrawable(Drawable drawable) { super.setImageDrawable(drawable); if (null != mAttacher) { mAttacher.update(); } } @Override public void setImageResource(int resId) { super.setImageResource(resId); if (null != mAttacher) { mAttacher.update(); } } @Override public void setImageURI(Uri uri) { super.setImageURI(uri); if (null != mAttacher) { mAttacher.update(); } } @Override public void setOnMatrixChangeListener(OnMatrixChangedListener listener) { mAttacher.setOnMatrixChangeListener(listener); } @Override public void setOnLongClickListener(OnLongClickListener l) { mAttacher.setOnLongClickListener(l); } @Override public void setOnPhotoTapListener(OnPhotoTapListener listener) { mAttacher.setOnPhotoTapListener(listener); } @Override public OnPhotoTapListener getOnPhotoTapListener() { return mAttacher.getOnPhotoTapListener(); } @Override public void setOnViewTapListener(OnViewTapListener listener) { mAttacher.setOnViewTapListener(listener); } @Override public OnViewTapListener getOnViewTapListener() { return mAttacher.getOnViewTapListener(); } @Override public void setScale(float scale) { mAttacher.setScale(scale); } @Override public void setScale(float scale, boolean animate) { mAttacher.setScale(scale, animate); } @Override public void setScale(float scale, float focalX, float focalY, boolean animate) { mAttacher.setScale(scale, focalX, focalY, animate); } @Override public void setScaleType(ScaleType scaleType) { if (null != mAttacher) { mAttacher.setScaleType(scaleType); } else { mPendingScaleType = scaleType; } } @Override public void setZoomable(boolean zoomable) { mAttacher.setZoomable(zoomable); } @Override public Bitmap getVisibleRectangleBitmap() { return mAttacher.getVisibleRectangleBitmap(); } @Override public void setZoomTransitionDuration(int milliseconds) { mAttacher.setZoomTransitionDuration(milliseconds); } @Override public IPhotoView getIPhotoViewImplementation() { return mAttacher; } @Override public void setOnDoubleTapListener(GestureDetector.OnDoubleTapListener newOnDoubleTapListener) { mAttacher.setOnDoubleTapListener(newOnDoubleTapListener); } @Override public void setOnScaleChangeListener(PhotoViewAttacher.OnScaleChangeListener onScaleChangeListener) { mAttacher.setOnScaleChangeListener(onScaleChangeListener); } @Override protected void onDetachedFromWindow() { mAttacher.cleanup(); mDraweeHolder.onDetach(); super.onDetachedFromWindow(); } @Override protected void onAttachedToWindow() { init(); mDraweeHolder.onAttach(); super.onAttachedToWindow(); } @Override protected boolean verifyDrawable(Drawable dr) { if (dr == mDraweeHolder.getHierarchy().getTopLevelDrawable()) { return true; } return false; } @Override public void onStartTemporaryDetach() { super.onStartTemporaryDetach(); mDraweeHolder.onDetach(); } @Override public void onFinishTemporaryDetach() { super.onFinishTemporaryDetach(); mDraweeHolder.onAttach(); } public void setImageUri(final String url) { ImageRequest imageRequest = ImageRequestBuilder.newBuilderWithSource(Uri.parse(PhotoUtils.parseUrl(url))) .setAutoRotateEnabled(true).build(); ImagePipeline imagePipeline = Fresco.getImagePipeline(); final DataSource<CloseableReference<CloseableImage>> dataSource = imagePipeline .fetchDecodedImage(imageRequest, this); DraweeController controller = Fresco.newDraweeControllerBuilder() .setOldController(mDraweeHolder.getController()).setImageRequest(imageRequest) .setControllerListener(new BaseControllerListener<ImageInfo>() { @Override public void onFinalImageSet(String s, @Nullable ImageInfo imageInfo, @Nullable Animatable animatable) { try { imageReference = dataSource.getResult(); if (imageReference != null) { CloseableImage image = imageReference.get(); // do something with the image if (image != null && image instanceof CloseableStaticBitmap) { CloseableStaticBitmap closeableStaticBitmap = (CloseableStaticBitmap) image; Bitmap bitmap = closeableStaticBitmap.getUnderlyingBitmap(); if (bitmap != null) { if (url.startsWith("http://")) { setImageBitmap(bitmap); } else { int angle = PhotoUtils.readPictureDegree(url.substring(7)); setImageBitmap(PhotoUtils.rotaingImageView(angle, bitmap)); } } } } } finally { dataSource.close(); CloseableReference.closeSafely(imageReference); } } }).setTapToRetryEnabled(true).build(); mDraweeHolder.setController(controller); } public void setImageUri(String uri, int width, int height) { ImageRequest imageRequest = ImageRequestBuilder.newBuilderWithSource(Uri.parse(uri)) .setAutoRotateEnabled(true).setResizeOptions(new ResizeOptions(width, height)).build(); ImagePipeline imagePipeline = Fresco.getImagePipeline(); final DataSource<CloseableReference<CloseableImage>> dataSource = imagePipeline .fetchDecodedImage(imageRequest, this); DraweeController controller = Fresco.newDraweeControllerBuilder() .setOldController(mDraweeHolder.getController()).setImageRequest(imageRequest) .setControllerListener(new BaseControllerListener<ImageInfo>() { @Override public void onFinalImageSet(String s, @Nullable ImageInfo imageInfo, @Nullable Animatable animatable) { try { imageReference = dataSource.getResult(); if (imageReference != null) { CloseableImage image = imageReference.get(); if (image != null && image instanceof CloseableStaticBitmap) { CloseableStaticBitmap closeableStaticBitmap = (CloseableStaticBitmap) image; Bitmap bitmap = closeableStaticBitmap.getUnderlyingBitmap(); if (bitmap != null) { setImageBitmap(bitmap); } } } } finally { dataSource.close(); CloseableReference.closeSafely(imageReference); } } }).setTapToRetryEnabled(true).build(); mDraweeHolder.setController(controller); } @Override public void onUpdate(int progress) { if (mDownloadListener != null) { mDownloadListener.onUpdate(progress); } } }