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/*
* Copyright (C) 2013 The Android Open Source Project
*
* 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.android.settings.location;
import android.app.AppGlobals;
import android.app.AppOpsManager;
import android.content.Context;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.content.pm.IPackageManager;
import android.content.res.Resources;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.os.Process;
import android.os.RemoteException;
import android.os.UserHandle;
import android.os.UserManager;
import android.preference.Preference;
import android.util.Log;
import android.view.View;
import android.widget.TextView;
import com.android.settings.R;
import com.android.settings.SettingsActivity;
import com.android.settings.applications.InstalledAppDetails;
import java.util.ArrayList;
import java.util.List;
/**
* Retrieves the information of applications which accessed location recently.
*/
public class RecentLocationApps {
private static final String TAG = RecentLocationApps.class.getSimpleName();
private static final String ANDROID_SYSTEM_PACKAGE_NAME = "android";
private static final int RECENT_TIME_INTERVAL_MILLIS = 15 * 60 * 1000;
private final SettingsActivity mActivity;
private final PackageManager mPackageManager;
public RecentLocationApps(SettingsActivity activity) {
mActivity = activity;
mPackageManager = activity.getPackageManager();
}
private class PackageEntryClickedListener
implements Preference.OnPreferenceClickListener {
private String mPackage;
public PackageEntryClickedListener(String packageName) {
mPackage = packageName;
}
@Override
public boolean onPreferenceClick(Preference preference) {
// start new fragment to display extended information
Bundle args = new Bundle();
args.putString(InstalledAppDetails.ARG_PACKAGE_NAME, mPackage);
mActivity.startPreferencePanel(InstalledAppDetails.class.getName(), args,
R.string.application_info_label, null, null, 0);
return true;
}
}
/**
* Subclass of {@link Preference} to intercept views and allow content description to be set on
* them for accessibility purposes.
*/
private static class AccessiblePreference extends Preference {
public CharSequence mContentDescription;
public AccessiblePreference(Context context, CharSequence contentDescription) {
super(context);
mContentDescription = contentDescription;
}
@Override
protected void onBindView(View view) {
super.onBindView(view);
if (mContentDescription != null) {
final TextView titleView = (TextView) view.findViewById(android.R.id.title);
titleView.setContentDescription(mContentDescription);
}
}
}
private AccessiblePreference createRecentLocationEntry(
Drawable icon,
CharSequence label,
boolean isHighBattery,
CharSequence contentDescription,
Preference.OnPreferenceClickListener listener) {
AccessiblePreference pref = new AccessiblePreference(mActivity, contentDescription);
pref.setIcon(icon);
pref.setTitle(label);
if (isHighBattery) {
pref.setSummary(R.string.location_high_battery_use);
} else {
pref.setSummary(R.string.location_low_battery_use);
}
pref.setOnPreferenceClickListener(listener);
return pref;
}
/**
* Fills a list of applications which queried location recently within specified time.
*/
public List<Preference> getAppList() {
// Retrieve a location usage list from AppOps
AppOpsManager aoManager =
(AppOpsManager) mActivity.getSystemService(Context.APP_OPS_SERVICE);
List<AppOpsManager.PackageOps> appOps = aoManager.getPackagesForOps(new int[] {
AppOpsManager.OP_MONITOR_LOCATION, AppOpsManager.OP_MONITOR_HIGH_POWER_LOCATION, });
// Process the AppOps list and generate a preference list.
ArrayList<Preference> prefs = new ArrayList<Preference>();
final long now = System.currentTimeMillis();
final UserManager um = (UserManager) mActivity.getSystemService(Context.USER_SERVICE);
final List<UserHandle> profiles = um.getUserProfiles();
final int appOpsN = appOps.size();
for (int i = 0; i < appOpsN; ++i) {
AppOpsManager.PackageOps ops = appOps.get(i);
// Don't show the Android System in the list - it's not actionable for the user.
// Also don't show apps belonging to background users except managed users.
String packageName = ops.getPackageName();
int uid = ops.getUid();
int userId = UserHandle.getUserId(uid);
boolean isAndroidOs =
(uid == Process.SYSTEM_UID) && ANDROID_SYSTEM_PACKAGE_NAME.equals(packageName);
if (isAndroidOs || !profiles.contains(new UserHandle(userId))) {
continue;
}
Preference preference = getPreferenceFromOps(um, now, ops);
if (preference != null) {
prefs.add(preference);
}
}
return prefs;
}
/**
* Creates a Preference entry for the given PackageOps.
*
* This method examines the time interval of the PackageOps first. If the PackageOps is older
* than the designated interval, this method ignores the PackageOps object and returns null.
* When the PackageOps is fresh enough, this method returns a Preference pointing to the App
* Info page for that package.
*/
private Preference getPreferenceFromOps(final UserManager um, long now,
AppOpsManager.PackageOps ops) {
String packageName = ops.getPackageName();
List<AppOpsManager.OpEntry> entries = ops.getOps();
boolean highBattery = false;
boolean normalBattery = false;
// Earliest time for a location request to end and still be shown in list.
long recentLocationCutoffTime = now - RECENT_TIME_INTERVAL_MILLIS;
for (AppOpsManager.OpEntry entry : entries) {
if (entry.isRunning() || entry.getTime() >= recentLocationCutoffTime) {
switch (entry.getOp()) {
case AppOpsManager.OP_MONITOR_LOCATION:
normalBattery = true;
break;
case AppOpsManager.OP_MONITOR_HIGH_POWER_LOCATION:
highBattery = true;
break;
default:
break;
}
}
}
if (!highBattery && !normalBattery) {
if (Log.isLoggable(TAG, Log.VERBOSE)) {
Log.v(TAG, packageName + " hadn't used location within the time interval.");
}
return null;
}
// The package is fresh enough, continue.
int uid = ops.getUid();
int userId = UserHandle.getUserId(uid);
AccessiblePreference preference = null;
try {
IPackageManager ipm = AppGlobals.getPackageManager();
ApplicationInfo appInfo =
ipm.getApplicationInfo(packageName, PackageManager.GET_META_DATA, userId);
if (appInfo == null) {
Log.w(TAG, "Null application info retrieved for package " + packageName
+ ", userId " + userId);
return null;
}
Resources res = mActivity.getResources();
final UserHandle userHandle = new UserHandle(userId);
Drawable appIcon = mPackageManager.getApplicationIcon(appInfo);
Drawable icon = um.getBadgedDrawableForUser(appIcon, userHandle);
CharSequence appLabel = mPackageManager.getApplicationLabel(appInfo);
CharSequence badgedAppLabel = um.getBadgedLabelForUser(appLabel.toString(), userHandle);
preference = createRecentLocationEntry(icon,
appLabel, highBattery, badgedAppLabel,
new PackageEntryClickedListener(packageName));
} catch (RemoteException e) {
Log.w(TAG, "Error while retrieving application info for package " + packageName
+ ", userId " + userId, e);
}
return preference;
}
}
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