forked from upstream-mirrors/OpenTracks
youtaol
99 lines
3.0 KiB
Java
99 lines
3.0 KiB
Java
/*
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* Copyright 2013 Google Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may not
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* use this file except in compliance with the License. You may obtain a copy of
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* the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations under
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* the License.
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*/
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package com.google.android.apps.mytracks.util;
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import com.google.android.apps.mytracks.services.tasks.BitmapLoader;
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import android.net.Uri;
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import android.widget.ImageView;
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import java.lang.ref.WeakReference;
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/**
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* Utilities for photos.
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*
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* @author Jimmy Shih
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*/
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public class PhotoUtils {
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private PhotoUtils() {}
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/**
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* Sets an image view.
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*
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* @param imageView the image view
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* @param uri the image uri
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* @param targetWidth the target width
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* @param targetHeight the target height
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* @param fitWithin true to fit within the target area in order to display the
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* entire image (no cropping). False to fill the entire target area.
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* (allow cropping).
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*/
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public static void setImageVew(
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ImageView imageView, Uri uri, int targetWidth, int targetHeight, boolean fitWithin) {
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if (cancelBitmapLoader(imageView, uri)) {
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BitmapLoader bitmapLoader = new BitmapLoader(
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imageView, uri, targetWidth, targetHeight, fitWithin);
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WeakReference<BitmapLoader> bitmapLoaderReference = new WeakReference<BitmapLoader>(
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bitmapLoader);
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imageView.setTag(bitmapLoaderReference);
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bitmapLoader.execute();
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}
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}
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/**
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* Gets the image view bitmap loader.
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*
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* @param imageView the image view
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*/
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public static BitmapLoader getBitmapLoader(ImageView imageView) {
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if (imageView != null) {
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Object object = imageView.getTag();
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if (object instanceof WeakReference<?>) {
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@SuppressWarnings("unchecked")
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WeakReference<BitmapLoader> bitmapLoaderReference = (WeakReference<BitmapLoader>) object;
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return bitmapLoaderReference.get();
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}
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}
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return null;
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}
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/**
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* Cancels the image view bitmap loader.
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*
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* @param imageView the image view
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* @param uri the uri
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* @return false if the bitmap loader shouldn't be canceled. True if there is
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* no bitmap loader or the bitmap loader is cancelled.
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*/
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private static boolean cancelBitmapLoader(ImageView imageView, Uri uri) {
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BitmapLoader bitmapLoaderAsyncTask = getBitmapLoader(imageView);
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if (bitmapLoaderAsyncTask != null) {
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if (bitmapLoaderAsyncTask.getUri().equals(uri)) {
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// same bitmap loader is already in progress, don't cancel
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return false;
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} else {
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// cancel previous bitmap loader
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bitmapLoaderAsyncTask.cancel(true);
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}
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}
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// imageview has no bitmap loader, or an existing bitmap loader is cancelled
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return true;
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}
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}
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