1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
|
package com.bumptech.glide.load.data;
import android.content.ContentResolver;
import android.content.Context;
import android.database.Cursor;
import android.net.Uri;
import android.provider.MediaStore;
import android.text.TextUtils;
import com.bumptech.glide.Priority;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
/**
* A DataFetcher that retrieves an {@link java.io.InputStream} for a local Uri that may or may not be for a resource
* in the media store. If the local Uri is for a resource in the media store and the size requested is less than or
* equal to the media store thumbnail size, preferentially attempts to fetch data for the pre-generated media store
* thumbs using {@link android.provider.MediaStore.Images.Thumbnails} and
* {@link android.provider.MediaStore.Video.Thumbnails}.
*/
public class MediaStoreThumbFetcher implements DataFetcher<InputStream> {
private static final int MINI_WIDTH = 512;
private static final int MINI_HEIGHT = 384;
private static final ThumbnailStreamOpenerFactory DEFAULT_FACTORY = new ThumbnailStreamOpenerFactory();
private final Context context;
private final Uri mediaStoreUri;
private final DataFetcher<InputStream> defaultFetcher;
private final int width;
private final int height;
private final ThumbnailStreamOpenerFactory factory;
private InputStream inputStream;
public MediaStoreThumbFetcher(Context context, Uri mediaStoreUri, DataFetcher<InputStream> defaultFetcher,
int width, int height) {
this(context, mediaStoreUri, defaultFetcher, width, height, DEFAULT_FACTORY);
}
MediaStoreThumbFetcher(Context context, Uri mediaStoreUri, DataFetcher<InputStream> defaultFetcher, int width,
int height, ThumbnailStreamOpenerFactory factory) {
this.context = context;
this.mediaStoreUri = mediaStoreUri;
this.defaultFetcher = defaultFetcher;
this.width = width;
this.height = height;
this.factory = factory;
}
@Override
public InputStream loadData(Priority priority) throws Exception {
ThumbnailStreamOpener fetcher = factory.build(mediaStoreUri, width, height);
if (fetcher != null) {
inputStream = fetcher.open(context, mediaStoreUri);
}
if (inputStream != null) {
return inputStream;
} else {
return defaultFetcher.loadData(priority);
}
}
@Override
public void cleanup() {
if (inputStream != null) {
try {
inputStream.close();
} catch (IOException e) {
// Do nothing.
}
}
defaultFetcher.cleanup();
}
@Override
public String getId() {
return mediaStoreUri.toString();
}
@Override
public void cancel() {
// Do nothing.
}
private static boolean isMediaStoreUri(Uri uri) {
return uri != null
&& ContentResolver.SCHEME_CONTENT.equals(uri.getScheme())
&& MediaStore.AUTHORITY.equals(uri.getAuthority());
}
private static boolean isMediaStoreVideo(Uri uri) {
return isMediaStoreUri(uri) && uri.getPathSegments().contains("video");
}
static class FileService {
public boolean exists(File file) {
return file.exists();
}
public long length(File file) {
return file.length();
}
public File get(String path) {
return new File(path);
}
}
interface ThumbnailQuery {
Cursor query(Context context, Uri uri);
}
static class ThumbnailStreamOpener {
private static final FileService DEFAULT_SERVICE = new FileService();
private final FileService service;
private ThumbnailQuery query;
public ThumbnailStreamOpener(ThumbnailQuery query) {
this(DEFAULT_SERVICE, query);
}
public ThumbnailStreamOpener(FileService service, ThumbnailQuery query) {
this.service = service;
this.query = query;
}
public InputStream open(Context context, Uri uri) throws FileNotFoundException {
Uri thumbnailUri = null;
InputStream inputStream = null;
final Cursor cursor = query.query(context, uri);
try {
if (cursor != null && cursor.moveToFirst()) {
String path = cursor.getString(0);
if (!TextUtils.isEmpty(path)) {
File file = service.get(path);
if (service.exists(file) && service.length(file) > 0) {
thumbnailUri = Uri.fromFile(file);
}
}
}
} finally {
if (cursor != null) {
cursor.close();
}
}
if (thumbnailUri != null) {
inputStream = context.getContentResolver().openInputStream(thumbnailUri);
}
return inputStream;
}
}
static class ImageThumbnailQuery implements ThumbnailQuery {
@Override
public Cursor query(Context context, Uri uri) {
String id = uri.getLastPathSegment();
return context.getContentResolver().query(MediaStore.Images.Thumbnails.EXTERNAL_CONTENT_URI, new String[] {
MediaStore.Images.Thumbnails.DATA
}, MediaStore.Images.Thumbnails.IMAGE_ID + " = ? AND " + MediaStore.Images.Thumbnails.KIND + " = ?",
new String[] { id, String.valueOf(MediaStore.Images.Thumbnails.MINI_KIND) }, null);
}
}
static class VideoThumbnailQuery implements ThumbnailQuery {
@Override
public Cursor query(Context context, Uri uri) {
String id = uri.getLastPathSegment();
return context.getContentResolver().query(MediaStore.Video.Thumbnails.EXTERNAL_CONTENT_URI, new String[] {
MediaStore.Video.Thumbnails.DATA
}, MediaStore.Video.Thumbnails.VIDEO_ID + " = ? AND " + MediaStore.Video.Thumbnails.KIND + " = ?",
new String[] { id, String.valueOf(MediaStore.Video.Thumbnails.MINI_KIND) }, null);
}
}
static class ThumbnailStreamOpenerFactory {
public ThumbnailStreamOpener build(Uri uri, int width, int height) {
if (!isMediaStoreUri(uri) || width > MINI_WIDTH || height > MINI_HEIGHT) {
return null;
} else if (isMediaStoreVideo(uri)) {
return new ThumbnailStreamOpener(new VideoThumbnailQuery());
} else {
return new ThumbnailStreamOpener(new ImageThumbnailQuery());
}
}
}
}
|
