Initial checkin of AOSP Messaging app.

b/23110861

Change-Id: I9aa980d7569247d6b2ca78f5dcb4502e1eaadb8a

src/com/android/messaging/ui/PlaybackStateView.java

@@ -0,0 +1,43 @@
+/*
+ * 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.ui;
+
+/**
+ * An interface for a UI element ("View") that reflects the playback state of a piece of media
+ * content. It needs to support the ability to take common playback commands (play, pause, stop,
+ * restart) and reflect the state in UI (through timer or progress bar etc.)
+ */
+public interface PlaybackStateView {
+    /**
+     * Restart the playback.
+     */
+    void restart();
+
+    /**
+     * Reset ("stop") the playback to the starting position.
+     */
+    void reset();
+
+    /**
+     * Resume the playback, or start it if it hasn't been started yet.
+     */
+    void resume();
+
+    /**
+     * Pause the playback.
+     */
+    void pause();
+}