1/* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package com.android.systemui.statusbar.policy; 18 19import static com.android.settingslib.Utils.updateLocationEnabled; 20 21import android.app.ActivityManager; 22import android.app.AppOpsManager; 23import android.app.StatusBarManager; 24import android.content.BroadcastReceiver; 25import android.content.Context; 26import android.content.Intent; 27import android.content.IntentFilter; 28import android.location.LocationManager; 29import android.os.Handler; 30import android.os.Looper; 31import android.os.Message; 32import android.os.Process; 33import android.os.UserHandle; 34import android.os.UserManager; 35import android.provider.Settings; 36import android.support.annotation.VisibleForTesting; 37import com.android.systemui.util.Utils; 38import java.util.ArrayList; 39import java.util.List; 40 41/** 42 * A controller to manage changes of location related states and update the views accordingly. 43 */ 44public class LocationControllerImpl extends BroadcastReceiver implements LocationController { 45 46 private static final int[] mHighPowerRequestAppOpArray 47 = new int[] {AppOpsManager.OP_MONITOR_HIGH_POWER_LOCATION}; 48 49 private Context mContext; 50 51 private AppOpsManager mAppOpsManager; 52 private StatusBarManager mStatusBarManager; 53 54 private boolean mAreActiveLocationRequests; 55 56 private ArrayList<LocationChangeCallback> mSettingsChangeCallbacks = 57 new ArrayList<LocationChangeCallback>(); 58 private final H mHandler = new H(); 59 60 public LocationControllerImpl(Context context, Looper bgLooper) { 61 mContext = context; 62 63 // Register to listen for changes in location settings. 64 IntentFilter filter = new IntentFilter(); 65 filter.addAction(LocationManager.HIGH_POWER_REQUEST_CHANGE_ACTION); 66 filter.addAction(LocationManager.MODE_CHANGED_ACTION); 67 context.registerReceiverAsUser(this, UserHandle.ALL, filter, null, new Handler(bgLooper)); 68 69 mAppOpsManager = (AppOpsManager) context.getSystemService(Context.APP_OPS_SERVICE); 70 mStatusBarManager 71 = (StatusBarManager) context.getSystemService(Context.STATUS_BAR_SERVICE); 72 73 // Examine the current location state and initialize the status view. 74 updateActiveLocationRequests(); 75 } 76 77 /** 78 * Add a callback to listen for changes in location settings. 79 */ 80 public void addCallback(LocationChangeCallback cb) { 81 mSettingsChangeCallbacks.add(cb); 82 mHandler.sendEmptyMessage(H.MSG_LOCATION_SETTINGS_CHANGED); 83 } 84 85 public void removeCallback(LocationChangeCallback cb) { 86 mSettingsChangeCallbacks.remove(cb); 87 } 88 89 /** 90 * Enable or disable location in settings. 91 * 92 * <p>This will attempt to enable/disable every type of location setting 93 * (e.g. high and balanced power). 94 * 95 * <p>If enabling, a user consent dialog will pop up prompting the user to accept. 96 * If the user doesn't accept, network location won't be enabled. 97 * 98 * @return true if attempt to change setting was successful. 99 */ 100 public boolean setLocationEnabled(boolean enabled) { 101 // QuickSettings always runs as the owner, so specifically set the settings 102 // for the current foreground user. 103 int currentUserId = ActivityManager.getCurrentUser(); 104 if (isUserLocationRestricted(currentUserId)) { 105 return false; 106 } 107 // When enabling location, a user consent dialog will pop up, and the 108 // setting won't be fully enabled until the user accepts the agreement. 109 updateLocationEnabled(mContext, enabled, currentUserId, 110 Settings.Secure.LOCATION_CHANGER_QUICK_SETTINGS); 111 return true; 112 } 113 114 /** 115 * Returns true if location is enabled in settings. 116 */ 117 public boolean isLocationEnabled() { 118 // QuickSettings always runs as the owner, so specifically retrieve the settings 119 // for the current foreground user. 120 LocationManager locationManager = 121 (LocationManager) mContext.getSystemService(Context.LOCATION_SERVICE); 122 return locationManager.isLocationEnabledForUser( 123 UserHandle.of(ActivityManager.getCurrentUser())); 124 } 125 126 @Override 127 public boolean isLocationActive() { 128 return mAreActiveLocationRequests; 129 } 130 131 /** 132 * Returns true if the current user is restricted from using location. 133 */ 134 private boolean isUserLocationRestricted(int userId) { 135 final UserManager um = (UserManager) mContext.getSystemService(Context.USER_SERVICE); 136 return um.hasUserRestriction(UserManager.DISALLOW_SHARE_LOCATION, 137 UserHandle.of(userId)); 138 } 139 140 /** 141 * Returns true if there currently exist active high power location requests. 142 */ 143 @VisibleForTesting 144 protected boolean areActiveHighPowerLocationRequests() { 145 List<AppOpsManager.PackageOps> packages 146 = mAppOpsManager.getPackagesForOps(mHighPowerRequestAppOpArray); 147 // AppOpsManager can return null when there is no requested data. 148 if (packages != null) { 149 final int numPackages = packages.size(); 150 for (int packageInd = 0; packageInd < numPackages; packageInd++) { 151 AppOpsManager.PackageOps packageOp = packages.get(packageInd); 152 List<AppOpsManager.OpEntry> opEntries = packageOp.getOps(); 153 if (opEntries != null) { 154 final int numOps = opEntries.size(); 155 for (int opInd = 0; opInd < numOps; opInd++) { 156 AppOpsManager.OpEntry opEntry = opEntries.get(opInd); 157 // AppOpsManager should only return OP_MONITOR_HIGH_POWER_LOCATION because 158 // of the mHighPowerRequestAppOpArray filter, but checking defensively. 159 if (opEntry.getOp() == AppOpsManager.OP_MONITOR_HIGH_POWER_LOCATION) { 160 if (opEntry.isRunning()) { 161 return true; 162 } 163 } 164 } 165 } 166 } 167 } 168 169 return false; 170 } 171 172 // Reads the active location requests and updates the status view if necessary. 173 private void updateActiveLocationRequests() { 174 boolean hadActiveLocationRequests = mAreActiveLocationRequests; 175 mAreActiveLocationRequests = areActiveHighPowerLocationRequests(); 176 if (mAreActiveLocationRequests != hadActiveLocationRequests) { 177 mHandler.sendEmptyMessage(H.MSG_LOCATION_ACTIVE_CHANGED); 178 } 179 } 180 181 @Override 182 public void onReceive(Context context, Intent intent) { 183 final String action = intent.getAction(); 184 if (LocationManager.HIGH_POWER_REQUEST_CHANGE_ACTION.equals(action)) { 185 updateActiveLocationRequests(); 186 } else if (LocationManager.MODE_CHANGED_ACTION.equals(action)) { 187 mHandler.sendEmptyMessage(H.MSG_LOCATION_SETTINGS_CHANGED); 188 } 189 } 190 191 private final class H extends Handler { 192 private static final int MSG_LOCATION_SETTINGS_CHANGED = 1; 193 private static final int MSG_LOCATION_ACTIVE_CHANGED = 2; 194 195 @Override 196 public void handleMessage(Message msg) { 197 switch (msg.what) { 198 case MSG_LOCATION_SETTINGS_CHANGED: 199 locationSettingsChanged(); 200 break; 201 case MSG_LOCATION_ACTIVE_CHANGED: 202 locationActiveChanged(); 203 break; 204 } 205 } 206 207 private void locationActiveChanged() { 208 Utils.safeForeach(mSettingsChangeCallbacks, 209 cb -> cb.onLocationActiveChanged(mAreActiveLocationRequests)); 210 } 211 212 private void locationSettingsChanged() { 213 boolean isEnabled = isLocationEnabled(); 214 Utils.safeForeach(mSettingsChangeCallbacks, 215 cb -> cb.onLocationSettingsChanged(isEnabled)); 216 } 217 } 218} 219