/*
* Copyright 2015. Appsi Mobile
*
* 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.appsimobile.appsii.module.apps;
import android.app.ActivityManager;
import android.content.AsyncTaskLoader;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import static android.app.ActivityManager.RunningAppProcessInfo;
/**
* A custom Loader that loads all of the installed applications.
*/
public class AppRunningLoader extends AsyncTaskLoader<List<AppEntry>> {
final InterestingConfigChanges mLastConfig = new InterestingConfigChanges();
final Context mContext;
private final Map<ComponentName, CharSequence> mLabelCache = AppListLoader.sLabelCache;
List<AppEntry> mApps;
PackageIntentReceiver mPackageObserver;
ActivityManager mActivityManager;
public AppRunningLoader(Context context, ActivityManager activityManager) {
super(context);
mActivityManager = activityManager;
// Retrieve the package manager for later use; note we don't
// use 'context' directly but instead the save global application
// context returned by getContext().
mContext = context;
}
/**
* Handles a request to cancel a load.
*/
@Override
public void onCanceled(List<AppEntry> apps) {
super.onCanceled(apps);
// At this point we can release the resources associated with 'apps'
// if needed.
onReleaseResources(apps);
}
/**
* This is where the bulk of our work is done. This function is
* called in a background thread and should generate a new set of
* data to be published by the loader.
*/
@Override
public List<AppEntry> loadInBackground() {
List<RunningAppProcessInfo> apps = mActivityManager.getRunningAppProcesses();
if (apps == null) return null;
List<AppEntry> result = new ArrayList<>();
final Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);
mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);
// Query for the set of apps
// Create the ApplicationInfos
for (int i = 0; i < apps.size(); i++) {
RunningAppProcessInfo app = apps.get(i);
String[] packages = app.pkgList;
String mypackage = packages[0];
PackageManager pm = mContext.getPackageManager();
PackageInfo packageinfo;
try {
packageinfo = pm.getPackageInfo(mypackage, 0);
} catch (PackageManager.NameNotFoundException e) {
continue;
}
CharSequence label = packageinfo.applicationInfo.loadLabel(pm);
AppEntry entry =
new RunningAppProcessInfoAppEntry(app, packageinfo.applicationInfo, label);
result.add(entry);
}
return result;
}
/**
* Called when there is new data to deliver to the client. The
* super class will take care of delivering it; the implementation
* here just adds a little more logic.
*/
@Override
public void deliverResult(List<AppEntry> apps) {
if (isReset()) {
// An async query came in while the loader is stopped. We
// don't need the result.
if (apps != null) {
onReleaseResources(apps);
}
}
List<AppEntry> oldApps = mApps;
mApps = apps;
if (isStarted()) {
// If the Loader is currently started, we can immediately
// deliver its results.
super.deliverResult(apps);
}
// At this point we can release the resources associated with
// 'oldApps' if needed; now that the new result is delivered we
// know that it is no longer in use.
if (oldApps != null) {
onReleaseResources(oldApps);
}
}
/**
* Handles a request to start the Loader.
*/
@Override
protected void onStartLoading() {
if (mApps != null) {
// If we currently have a result available, deliver it
// immediately.
deliverResult(mApps);
}
// Start watching for changes in the app data.
if (mPackageObserver == null) {
mPackageObserver = new PackageIntentReceiver(this);
}
// Has something interesting in the configuration changed since we
// last built the app list?
boolean configChange = mLastConfig.applyNewConfig(getContext().getResources());
if (takeContentChanged() || mApps == null || configChange) {
// If the data has changed since the last time it was loaded
// or is not currently available, start a load.
forceLoad();
}
}
/**
* Handles a request to stop the Loader.
*/
@Override
protected void onStopLoading() {
// Attempt to cancel the current load task if possible.
cancelLoad();
}
/**
* Handles a request to completely reset the Loader.
*/
@Override
protected void onReset() {
super.onReset();
// Ensure the loader is stopped
onStopLoading();
// At this point we can release the resources associated with 'apps'
// if needed.
if (mApps != null) {
onReleaseResources(mApps);
mApps = null;
}
// Stop monitoring for changes.
if (mPackageObserver != null) {
getContext().unregisterReceiver(mPackageObserver);
mPackageObserver = null;
}
}
/**
* Helper function to take care of releasing resources associated
* with an actively loaded data set.
*/
protected void onReleaseResources(List<AppEntry> apps) {
// For a simple List<> there is nothing to do. For something
// like a Cursor, we would close it here.
}
}