Merge "Move RecentLocationApps to SettingsLib"

/*

 * Copyright (C) 2015 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.settingslib.location;

import android.app.AppGlobals;

import android.app.AppOpsManager;

import android.content.Context;

import android.content.pm.ApplicationInfo;

import android.content.pm.IPackageManager;

import android.content.pm.PackageManager;

import android.graphics.drawable.Drawable;

import android.os.Process;

import android.os.RemoteException;

import android.os.UserHandle;

import android.os.UserManager;

import android.util.Log;

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 static final int[] LOCATION_OPS = new int[] {

            AppOpsManager.OP_MONITOR_LOCATION,

            AppOpsManager.OP_MONITOR_HIGH_POWER_LOCATION,

    };

    private final PackageManager mPackageManager;

    private final Context mContext;

    public RecentLocationApps(Context context) {

        mContext = context;

        mPackageManager = context.getPackageManager();

    }

    /**

     * Fills a list of applications which queried location recently within specified time.

     */

    public List<Request> getAppList() {

        // Retrieve a location usage list from AppOps

        AppOpsManager aoManager =

                (AppOpsManager) mContext.getSystemService(Context.APP_OPS_SERVICE);

        List<AppOpsManager.PackageOps> appOps = aoManager.getPackagesForOps(LOCATION_OPS);

        // Process the AppOps list and generate a preference list.

        ArrayList<Request> requests = new ArrayList<>(appOps.size());

        final long now = System.currentTimeMillis();

        final UserManager um = (UserManager) mContext.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;

            }

            Request request = getRequestFromOps(now, ops);

            if (request != null) {

                requests.add(request);

            }

        }

        return requests;

    }

    /**

     * Creates a Request 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 Request object for the package

     */

    private Request getRequestFromOps(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);

        Request request = 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;

            }

            final UserHandle userHandle = new UserHandle(userId);

            Drawable appIcon = mPackageManager.getApplicationIcon(appInfo);

            Drawable icon = mPackageManager.getUserBadgedIcon(appIcon, userHandle);

            CharSequence appLabel = mPackageManager.getApplicationLabel(appInfo);

            CharSequence badgedAppLabel = mPackageManager.getUserBadgedLabel(appLabel, userHandle);

            if (appLabel.toString().contentEquals(badgedAppLabel)) {

                // If badged label is not different from original then no need for it as

                // a separate content description.

                badgedAppLabel = null;

            }

            request = new Request(packageName, userHandle, icon, appLabel, highBattery,

                    badgedAppLabel);

        } catch (RemoteException e) {

            Log.w(TAG, "Error while retrieving application info for package " + packageName

                    + ", userId " + userId, e);

        }

        return request;

    }

    public static class Request {

        public final String packageName;

        public final UserHandle userHandle;

        public final Drawable icon;

        public final CharSequence label;

        public final boolean isHighBattery;

        public final CharSequence contentDescription;

        private Request(String packageName, UserHandle userHandle, Drawable icon,

                CharSequence label, boolean isHighBattery, CharSequence contentDescription) {

            this.packageName = packageName;

            this.userHandle = userHandle;

            this.icon = icon;

            this.label = label;

            this.isHighBattery = isHighBattery;

            this.contentDescription = contentDescription;

        }

    }

}