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      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      */
     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
     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
     74     protected void onPostExecute(Boolean ejected) {
     75         mCallback.accept(ejected);
     76     }
     77 }