81 lines
1.8 KiB
Java
81 lines
1.8 KiB
Java
package org.thoughtcrime.securesms.util;
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/*
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* Copyright (C) 2011 Alexander Blom
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import androidx.loader.content.AsyncTaskLoader;
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import android.content.Context;
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/**
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* Loader which extends AsyncTaskLoaders and handles caveats
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* as pointed out in http://code.google.com/p/android/issues/detail?id=14944.
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*
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* Based on CursorLoader.java in the Fragment compatibility package
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*
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* @author Alexander Blom (me@alexanderblom.se)
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*
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* @param <D> data type
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*/
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public abstract class AsyncLoader<D> extends AsyncTaskLoader<D> {
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private D data;
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public AsyncLoader(Context context) {
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super(context);
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}
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@Override
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public void deliverResult(D data) {
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if (isReset()) {
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// An async query came in while the loader is stopped
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return;
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}
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this.data = data;
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super.deliverResult(data);
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}
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@Override
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protected void onStartLoading() {
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if (data != null) {
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deliverResult(data);
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}
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if (takeContentChanged() || data == null) {
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forceLoad();
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}
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}
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@Override
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protected void onStopLoading() {
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// Attempt to cancel the current load task if possible.
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cancelLoad();
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}
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@Override
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protected void onReset() {
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super.onReset();
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// Ensure the loader is stopped
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onStopLoading();
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data = null;
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}
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}
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