Fix an issue when run SyncTest.

2013-10-30 11:13:50 +08:00
commit 7823ca4eec
1115 changed files with 75566 additions and 0 deletions
@@ -0,0 +1,98 @@
+/*
+ * Copyright 2013 Google Inc.
+ *
+ * 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.google.android.apps.mytracks.util;
+
+import com.google.android.apps.mytracks.services.tasks.BitmapLoader;
+
+import android.net.Uri;
+import android.widget.ImageView;
+
+import java.lang.ref.WeakReference;
+
+/**
+ * Utilities for photos.
+ * 
+ * @author Jimmy Shih
+ */
+public class PhotoUtils {
+
+  private PhotoUtils() {}
+
+  /**
+   * Sets an image view.
+   * 
+   * @param imageView the image view
+   * @param uri the image uri
+   * @param targetWidth the target width
+   * @param targetHeight the target height
+   * @param fitWithin true to fit within the target area in order to display the
+   *          entire image (no cropping). False to fill the entire target area.
+   *          (allow cropping).
+   */
+  public static void setImageVew(
+      ImageView imageView, Uri uri, int targetWidth, int targetHeight, boolean fitWithin) {
+    if (cancelBitmapLoader(imageView, uri)) {
+      BitmapLoader bitmapLoader = new BitmapLoader(
+          imageView, uri, targetWidth, targetHeight, fitWithin);
+      WeakReference<BitmapLoader> bitmapLoaderReference = new WeakReference<BitmapLoader>(
+          bitmapLoader);
+      imageView.setTag(bitmapLoaderReference);
+      bitmapLoader.execute();
+    }
+  }
+
+  /**
+   * Gets the image view bitmap loader.
+   * 
+   * @param imageView the image view
+   */
+  public static BitmapLoader getBitmapLoader(ImageView imageView) {
+    if (imageView != null) {
+      Object object = imageView.getTag();
+      if (object instanceof WeakReference<?>) {
+        @SuppressWarnings("unchecked")
+        WeakReference<BitmapLoader> bitmapLoaderReference = (WeakReference<BitmapLoader>) object;
+        return bitmapLoaderReference.get();
+      }
+    }
+    return null;
+  }
+
+  /**
+   * Cancels the image view bitmap loader.
+   * 
+   * @param imageView the image view
+   * @param uri the uri
+   * @return false if the bitmap loader shouldn't be canceled. True if there is
+   *         no bitmap loader or the bitmap loader is cancelled.
+   */
+  private static boolean cancelBitmapLoader(ImageView imageView, Uri uri) {
+    BitmapLoader bitmapLoaderAsyncTask = getBitmapLoader(imageView);
+
+    if (bitmapLoaderAsyncTask != null) {
+      if (bitmapLoaderAsyncTask.getUri().equals(uri)) {
+        // same bitmap loader is already in progress, don't cancel
+        return false;
+      } else {
+        // cancel previous bitmap loader
+        bitmapLoaderAsyncTask.cancel(true);
+      }
+    }
+    // imageview has no bitmap loader, or an existing bitmap loader is cancelled
+    return true;
+  }
+}