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 
17 package com.android.photos.drawables;
18 
19 import android.media.ExifInterface;
20 import android.text.TextUtils;
21 
22 import java.io.FileInputStream;
23 import java.io.FileNotFoundException;
24 import java.io.IOException;
25 import java.io.InputStream;
26 
27 public class DataUriThumbnailDrawable extends AutoThumbnailDrawable<String> {
28 
29     @Override
getPreferredImageBytes(String data)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
getFallbackImageStream(String data)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
dataChangedLocked(String data)51     protected boolean dataChangedLocked(String data) {
52         return !TextUtils.equals(mData, data);
53     }
54 }
55