1 /*
2  * Copyright (C) 2016 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.documentsui.sidebar;
18 
19 import android.content.ContentProviderClient;
20 import android.content.ContentResolver;
21 import android.net.Uri;
22 import android.os.AsyncTask;
23 import android.provider.DocumentsContract;
24 import android.util.Log;
25 
26 import com.android.documentsui.DocumentsApplication;
27 import com.android.documentsui.base.BooleanConsumer;
28 import com.android.documentsui.base.Shared;
29 
30 public final class EjectRootTask extends AsyncTask<Void, Void, Boolean> {
31 
32     private final String TAG = "EjectRootTask";
33 
34     private final ContentResolver mResolver;
35     private final String mAuthority;
36     private final String mRootId;
37     private final BooleanConsumer mCallback;
38 
39     /**
40      * @param finishCallback The end callback necessary when the eject task finishes
41      */
EjectRootTask( ContentResolver resolver, String authority, String rootId, BooleanConsumer finishCallback)42     public EjectRootTask(
43             ContentResolver resolver,
44             String authority,
45             String rootId,
46             BooleanConsumer finishCallback) {
47         mResolver = resolver;
48         mAuthority = authority;
49         mRootId = rootId;
50         mCallback = finishCallback;
51     }
52 
53     @Override
doInBackground(Void... args)54     protected Boolean doInBackground(Void... args) {
55         Uri rootUri = DocumentsContract.buildRootUri(mAuthority, mRootId);
56         ContentProviderClient client = null;
57         try {
58             client = DocumentsApplication.acquireUnstableProviderOrThrow(
59                     mResolver, mAuthority);
60             DocumentsContract.ejectRoot(client, rootUri);
61             return true;
62         } catch (IllegalStateException e) {
63             Log.w(TAG, "Failed to eject root.", e);
64         } catch (Exception e) {
65             Log.w(TAG, "Binder call failed.", e);
66         } finally {
67             ContentProviderClient.releaseQuietly(client);
68         }
69 
70         return false;
71     }
72 
73     @Override
onPostExecute(Boolean ejected)74     protected void onPostExecute(Boolean ejected) {
75         mCallback.accept(ejected);
76     }
77 }