/*
* Copyright (C) 2009 ZXing authors
*
* 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 ntu.com.google.zxing.client.android.share;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.os.AsyncTask;
import android.widget.ArrayAdapter;
import android.widget.ListAdapter;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
/**
* Loads a list of packages installed on the device asynchronously.
*
* @author Sean Owen
*/
final class LoadPackagesAsyncTask extends AsyncTask<List<String[]>, Void, List<String[]>> {
private static final String[] PKG_PREFIX_WHITELIST = {
"com.google.android.apps.",
};
private static final String[] PKG_PREFIX_BLACKLIST = {
"com.android.",
"android",
"com.google.android.",
"com.htc",
};
private final AppPickerActivity activity;
LoadPackagesAsyncTask(AppPickerActivity activity) {
this.activity = activity;
}
@Override
protected List<String[]> doInBackground(List<String[]>... objects) {
List<String[]> labelsPackages = objects[0];
PackageManager packageManager = activity.getPackageManager();
List<ApplicationInfo> appInfos = packageManager.getInstalledApplications(0);
for (ApplicationInfo appInfo : appInfos) {
CharSequence label = appInfo.loadLabel(packageManager);
if (label != null) {
String packageName = appInfo.packageName;
if (!isHidden(packageName)) {
labelsPackages.add(new String[]{label.toString(), packageName});
}
}
}
Collections.sort(labelsPackages, new ByFirstStringComparator());
return labelsPackages;
}
private static boolean isHidden(String packageName) {
if (packageName == null) {
return true;
}
for (String prefix : PKG_PREFIX_WHITELIST) {
if (packageName.startsWith(prefix)) {
return false;
}
}
for (String prefix : PKG_PREFIX_BLACKLIST) {
if (packageName.startsWith(prefix)) {
return true;
}
}
return false;
}
@Override
protected synchronized void onPostExecute(List<String[]> results) {
List<String> labels = new ArrayList<String>(results.size());
for (String[] result : results) {
labels.add(result[0]);
}
ListAdapter listAdapter = new ArrayAdapter<String>(activity,
android.R.layout.simple_list_item_1, labels);
activity.setListAdapter(listAdapter);
}
private static class ByFirstStringComparator implements Comparator<String[]>, Serializable {
public int compare(String[] o1, String[] o2) {
return o1[0].compareTo(o2[0]);
}
}
}