/***
Copyright (c) 2016 CommonsWare, LLC
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.
Covered in detail in the book _The Busy Coder's Guide to Android Development_
https://commonsware.com/Android
*/
package com.commonsware.android.sawmonitor;
import android.content.ComponentName;
import android.content.SharedPreferences;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.preference.MultiSelectListPreference;
import android.preference.Preference;
import android.preference.PreferenceFragment;
import android.preference.PreferenceManager;
import android.preference.SwitchPreference;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import static android.Manifest.permission.SYSTEM_ALERT_WINDOW;
public class SettingsFragment extends PreferenceFragment
implements Preference.OnPreferenceChangeListener,
SharedPreferences.OnSharedPreferenceChangeListener {
static final String PREF_ENABLED="enabled";
private PackageManager pm;
private SharedPreferences prefs;
private SwitchPreference enabled;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
addPreferencesFromResource(R.xml.settings);
pm=getActivity().getPackageManager();
enabled=(SwitchPreference)findPreference(PREF_ENABLED);
enabled.setOnPreferenceChangeListener(this);
populateWhitelist((MultiSelectListPreference)findPreference("whitelist"));
}
@Override
public void onStart() {
super.onStart();
prefs=PreferenceManager.getDefaultSharedPreferences(getActivity());
prefs.registerOnSharedPreferenceChangeListener(this);
syncEnabledStates();
}
@Override
public void onStop() {
super.onStop();
prefs.unregisterOnSharedPreferenceChangeListener(this);
}
@Override
public void onSharedPreferenceChanged(SharedPreferences prefs,
String s) {
if (PREF_ENABLED.equals(s)) {
syncEnabledStates();
}
}
@Override
public boolean onPreferenceChange(Preference preference,
Object newValue) {
Boolean state=(Boolean)newValue;
ComponentName cn=
new ComponentName(getActivity(), PackageReceiver.class);
int componentState=state ?
PackageManager.COMPONENT_ENABLED_STATE_ENABLED :
PackageManager.COMPONENT_ENABLED_STATE_DISABLED;
pm.setComponentEnabledSetting(cn, componentState,
PackageManager.DONT_KILL_APP);
return(true);
}
void populateWhitelist(MultiSelectListPreference whitelist) {
List<ApplicationInfo> apps=pm.getInstalledApplications(0);
Collections.sort(apps,
new ApplicationInfo.DisplayNameComparator(pm));
ArrayList<CharSequence> displayNames=
new ArrayList<CharSequence>();
ArrayList<String> packageNames=new ArrayList<String>();
for (ApplicationInfo app : apps) {
try {
PackageInfo pkgInfo=
pm.getPackageInfo(app.packageName,
PackageManager.GET_PERMISSIONS);
if (pkgInfo.requestedPermissions!=null) {
for (String perm : pkgInfo.requestedPermissions) {
if (SYSTEM_ALERT_WINDOW.equals(perm)) {
displayNames.add(app.loadLabel(pm));
packageNames.add(app.packageName);
break;
}
}
}
}
catch (PackageManager.NameNotFoundException e) {
// should not happen, quietly ignore
}
}
whitelist
.setEntries(displayNames
.toArray(new CharSequence[displayNames.size()]));
whitelist
.setEntryValues(packageNames
.toArray(new String[packageNames.size()]));
}
void syncEnabledStates() {
enabled.setChecked(prefs.getBoolean(PREF_ENABLED, false));
}
}