/* * Copyright (C) 2016 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.app.Activity; import android.os.AsyncTask; /** * An {@link AsyncTask} that guards work with checks that a paired {@link Activity} * is still alive. Instances of this class make no progress. * *
Use this type of task for greater safety when executing tasks that might complete * after an Activity is destroyed. * *
Also useful as tasks can be static, limiting scope, but still have access to
* the owning class (by way the A template and the mActivity field).
*
* @template Owner Activity type.
* @template Input input type
* @template Output output type
*/
abstract class PairedTask