1/*
2 * Copyright (C) 2013 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.camera.data;
18
19import android.database.ContentObserver;
20
21/**
22 * Listening to the changes to the local image and video data. onChange will
23 * happen on the main thread.
24 */
25public class LocalMediaObserver extends ContentObserver {
26
27    private boolean mActivityPaused = false;
28    private boolean mMediaDataChangedDuringPause = false;
29
30    public LocalMediaObserver() {
31        super(null);
32    }
33
34    /**
35     * When the activity is paused and MediaObserver get onChange() call, then
36     * we would like to set a dirty bit to reload the data at onResume().
37     */
38    @Override
39    public void onChange(boolean selfChange) {
40        if (mActivityPaused) {
41            mMediaDataChangedDuringPause = true;
42        }
43    }
44
45    public void setActivityPaused(boolean paused) {
46        mActivityPaused = paused;
47        if (!paused) {
48            mMediaDataChangedDuringPause = false;
49        }
50    }
51
52    public boolean isMediaDataChangedDuringPause() {
53        return mMediaDataChangedDuringPause;
54    }
55}
56