Resized thumbnails; async; extend MatrixCursor.
When requesting thumbnails, check if their dimensions are larger
than requested, and downscale to avoid memory pressure. Load them
async and with LruCache.
Extend MatrixCursor so that RowBuilder can offer() columns without
requiring they know the projection map. This makes it easier to
respond to query() calls, where the remote side controls the
projection map. Use it to handle custom projections in external
storage backend.
Update date/time formatting to match spec.
Bug: 10333418, 10331689
Change-Id: I7e947a8e8068af8a39b55e6766b3241de4f3fc16
diff --git a/src/com/android/documentsui/ThumbnailCache.java b/src/com/android/documentsui/ThumbnailCache.java
new file mode 100644
index 0000000..bc7abeb
--- /dev/null
+++ b/src/com/android/documentsui/ThumbnailCache.java
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2013 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.documentsui;
+
+import android.app.ActivityManager;
+import android.content.Context;
+import android.graphics.Bitmap;
+import android.net.Uri;
+import android.util.LruCache;
+
+public class ThumbnailCache extends LruCache<Uri, Bitmap> {
+ private static ThumbnailCache sCache;
+
+ public static ThumbnailCache get(Context context) {
+ if (sCache == null) {
+ final ActivityManager am = (ActivityManager) context.getSystemService(
+ Context.ACTIVITY_SERVICE);
+ final int memoryClassBytes = am.getMemoryClass() * 1024 * 1024;
+ sCache = new ThumbnailCache(memoryClassBytes / 4);
+ }
+ return sCache;
+ }
+
+ public ThumbnailCache(int maxSizeBytes) {
+ super(maxSizeBytes);
+ }
+
+ @Override
+ protected int sizeOf(Uri key, Bitmap value) {
+ return value.getByteCount();
+ }
+}