blob: 307531d5bf28c8be975ada241ec01fb6d30a62e5 (
plain)
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
|
/*
* Copyright (C) 2013 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.gallery3d.ingest.ui;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.mtp.MtpDevice;
import android.util.LruCache;
public class MtpBitmapCache extends LruCache<Integer, Bitmap> {
private static final int PER_DEVICE_CACHE_MAX_BYTES = 4194304;
private static MtpBitmapCache sInstance;
public synchronized static MtpBitmapCache getInstanceForDevice(MtpDevice device) {
if (sInstance == null || sInstance.mDevice != device) {
sInstance = new MtpBitmapCache(PER_DEVICE_CACHE_MAX_BYTES, device);
}
return sInstance;
}
public synchronized static void onDeviceDisconnected(MtpDevice device) {
if (sInstance != null && sInstance.mDevice == device) {
synchronized (sInstance) {
sInstance.mDevice = null;
}
sInstance = null;
}
}
private MtpDevice mDevice;
private MtpBitmapCache(int maxSize, MtpDevice device) {
super(maxSize);
mDevice = device;
}
@Override
protected int sizeOf(Integer key, Bitmap value) {
return value.getByteCount();
}
public Bitmap getOrCreate(Integer key) {
Bitmap b = get(key);
return b == null ? createAndInsert(key) : b;
}
private Bitmap createAndInsert(Integer key) {
MtpDevice device;
synchronized (this) {
device = mDevice;
}
if (device == null) return null;
byte[] imageBytes = device.getThumbnail(key);
if (imageBytes == null) return null;
Bitmap created = BitmapFactory.decodeByteArray(imageBytes, 0, imageBytes.length);
put(key, created);
return created;
}
}
|
