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.photos.drawables;
18
19import android.media.ExifInterface;
20import android.text.TextUtils;
21
22import java.io.FileInputStream;
23import java.io.FileNotFoundException;
24import java.io.IOException;
25import java.io.InputStream;
26
27public class DataUriThumbnailDrawable extends AutoThumbnailDrawable<String> {
28
29    @Override
30    protected byte[] getPreferredImageBytes(String data) {
31        byte[] thumbnail = null;
32        try {
33            ExifInterface exif = new ExifInterface(data);
34            if (exif.hasThumbnail()) {
35                thumbnail = exif.getThumbnail();
36             }
37        } catch (IOException e) { }
38        return thumbnail;
39    }
40
41    @Override
42    protected InputStream getFallbackImageStream(String data) {
43        try {
44            return new FileInputStream(data);
45        } catch (FileNotFoundException e) {
46            return null;
47        }
48    }
49
50    @Override
51    protected boolean dataChangedLocked(String data) {
52        return !TextUtils.equals(mData, data);
53    }
54}
55