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72 lines
2.0 KiB
72 lines
2.0 KiB
/*
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* Copyright (C) 2010 ZXing authors
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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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package com.geogle.zxing.decoding;
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import android.app.Activity;
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import java.util.concurrent.Executors;
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import java.util.concurrent.ScheduledExecutorService;
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import java.util.concurrent.ScheduledFuture;
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import java.util.concurrent.ThreadFactory;
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import java.util.concurrent.TimeUnit;
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/**
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* Finishes an activity after a period of inactivity.
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*/
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public final class InactivityTimer {
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private static final int INACTIVITY_DELAY_SECONDS = 5 * 60;
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private final ScheduledExecutorService inactivityTimer =
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Executors.newSingleThreadScheduledExecutor(new DaemonThreadFactory());
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private final Activity activity;
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private ScheduledFuture<?> inactivityFuture = null;
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public InactivityTimer(Activity activity) {
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this.activity = activity;
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onActivity();
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}
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public void onActivity() {
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cancel();
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inactivityFuture = inactivityTimer.schedule(new FinishListener(activity),
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INACTIVITY_DELAY_SECONDS,
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TimeUnit.SECONDS);
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}
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private void cancel() {
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if (inactivityFuture != null) {
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inactivityFuture.cancel(true);
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inactivityFuture = null;
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}
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}
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public void shutdown() {
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cancel();
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inactivityTimer.shutdown();
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}
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private static final class DaemonThreadFactory implements ThreadFactory {
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public Thread newThread(Runnable runnable) {
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Thread thread = new Thread(runnable);
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thread.setDaemon(true);
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return thread;
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}
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}
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}
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