blob: 49651b4dc50b2d120f0c470b7aa71aa49cb04255 (
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
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
|
/*
* 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.documentsui;
import android.content.AsyncTaskLoader;
import android.content.Context;
import com.android.documentsui.BaseActivity.State;
import com.android.documentsui.model.RootInfo;
import java.util.Collection;
public class RootsLoader extends AsyncTaskLoader<Collection<RootInfo>> {
private final ForceLoadContentObserver mObserver = new ForceLoadContentObserver();
private final RootsCache mRoots;
private final State mState;
private Collection<RootInfo> mResult;
public RootsLoader(Context context, RootsCache roots, State state) {
super(context);
mRoots = roots;
mState = state;
getContext().getContentResolver()
.registerContentObserver(RootsCache.sNotificationUri, false, mObserver);
}
@Override
public final Collection<RootInfo> loadInBackground() {
return mRoots.getMatchingRootsBlocking(mState);
}
@Override
public void deliverResult(Collection<RootInfo> result) {
if (isReset()) {
return;
}
Collection<RootInfo> oldResult = mResult;
mResult = result;
if (isStarted()) {
super.deliverResult(result);
}
}
@Override
protected void onStartLoading() {
if (mResult != null) {
deliverResult(mResult);
}
if (takeContentChanged() || mResult == null) {
forceLoad();
}
}
@Override
protected void onStopLoading() {
cancelLoad();
}
@Override
protected void onReset() {
super.onReset();
// Ensure the loader is stopped
onStopLoading();
mResult = null;
getContext().getContentResolver().unregisterContentObserver(mObserver);
}
}
|
