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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
package org.mozilla.tv.firefox.webrender;
import android.app.Activity;
import android.app.ActivityManager;
import android.app.Application;
import android.content.Context;
import android.os.Bundle;
import org.mozilla.tv.firefox.FirefoxApplication;
/**
* This ActivityLifecycleCallbacks implementations tracks if there is at least one activity in the
* STARTED state (meaning some part of our application is visible).
* Based on this information the current task can be removed if the app is not visible.
*/
public class VisibilityLifeCycleCallback implements Application.ActivityLifecycleCallbacks {
/**
* If all activities of this app are in the background then finish and remove all tasks. After
* that the app won't show up in "recent apps" anymore.
*/
/* package */ static void finishAndRemoveTaskIfInBackground(Context context) {
((FirefoxApplication) context.getApplicationContext())
.getVisibilityLifeCycleCallback()
.finishAndRemoveTaskIfInBackground();
}
private Context context;
/**
* Activities are not stopped/started in an ordered way. So we are using
*/
private int activitiesInStartedState;
public VisibilityLifeCycleCallback(Context context) {
this.context = context;
}
private void finishAndRemoveTaskIfInBackground() {
if (activitiesInStartedState == 0) {
final ActivityManager activityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
if (activityManager == null) {
return;
}
for (ActivityManager.AppTask task : activityManager.getAppTasks()) {
task.finishAndRemoveTask();
}
}
}
@Override
public void onActivityStarted(Activity activity) {
activitiesInStartedState++;
}
@Override
public void onActivityStopped(Activity activity) {
activitiesInStartedState--;
}
@Override
public void onActivityResumed(Activity activity) {}
@Override
public void onActivityPaused(Activity activity) {}
@Override
public void onActivityCreated(Activity activity, Bundle bundle) {}
@Override
public void onActivitySaveInstanceState(Activity activity, Bundle bundle) {}
@Override
public void onActivityDestroyed(Activity activity) {}
}