Initial checkin of AOSP Messaging app.

b/23110861

Change-Id: I9aa980d7569247d6b2ca78f5dcb4502e1eaadb8a

src/com/android/messaging/datamodel/media/VCardResource.java

@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2015 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.messaging.datamodel.media;
+
+import java.util.List;
+
+/**
+ * Holds cached information of VCard contact info.
+ * The temporarily persisted avatar icon Uri is tied to the VCardResource. As a result, whenever
+ * the VCardResource is no longer used (i.e. close() is called), we need to asynchronously
+ * delete the avatar image from temp storage since no one will have reference to the avatar Uri
+ * again. The next time the same VCard is displayed, since the old resource has been evicted from
+ * the memory cache, we'll load and persist the avatar icon again.
+ */
+public class VCardResource extends RefCountedMediaResource {
+    private final List<VCardResourceEntry> mVCards;
+
+    public VCardResource(final String key, final List<VCardResourceEntry> vcards) {
+        super(key);
+        mVCards = vcards;
+    }
+
+    public List<VCardResourceEntry> getVCards() {
+        return mVCards;
+    }
+
+    @Override
+    public int getMediaSize() {
+        // Instead of track VCards by size in kilobytes, we track them by count.
+        return 0;
+    }
+
+    @Override
+    protected void close() {
+        for (final VCardResourceEntry vcard : mVCards) {
+            vcard.close();
+        }
+    }
+}