1 /* 2 * Copyright (C) 2015 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 package com.android.permissioncontroller.permission.utils; 17 18 import static android.location.LocationManager.EXTRA_LOCATION_ENABLED; 19 20 import android.Manifest; 21 import android.app.AlertDialog; 22 import android.content.ActivityNotFoundException; 23 import android.content.BroadcastReceiver; 24 import android.content.Context; 25 import android.content.DialogInterface; 26 import android.content.DialogInterface.OnClickListener; 27 import android.content.Intent; 28 import android.content.IntentFilter; 29 import android.location.LocationManager; 30 import android.os.Handler; 31 import android.os.Looper; 32 import android.os.UserHandle; 33 import android.provider.Settings; 34 import android.util.Log; 35 36 import androidx.annotation.NonNull; 37 38 import com.android.permissioncontroller.PermissionControllerApplication; 39 import com.android.permissioncontroller.R; 40 41 import java.util.ArrayList; 42 43 public class LocationUtils { 44 45 public static final String LOCATION_PERMISSION = Manifest.permission_group.LOCATION; 46 47 private static final String TAG = LocationUtils.class.getSimpleName(); 48 private static final long LOCATION_UPDATE_DELAY_MS = 1000; 49 private static final Handler sMainHandler = new Handler(Looper.getMainLooper()); 50 showLocationDialog(final Context context, CharSequence label)51 public static void showLocationDialog(final Context context, CharSequence label) { 52 new AlertDialog.Builder(context) 53 .setIcon(R.drawable.ic_dialog_alert_material) 54 .setTitle(android.R.string.dialog_alert_title) 55 .setMessage(context.getString(R.string.location_warning, label)) 56 .setNegativeButton(R.string.ok, null) 57 .setPositiveButton(R.string.location_settings, new OnClickListener() { 58 @Override 59 public void onClick(DialogInterface dialog, int which) { 60 context.startActivity(new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS)); 61 } 62 }) 63 .show(); 64 } 65 66 /** Start the settings page for the location controller extra package. */ startLocationControllerExtraPackageSettings(@onNull Context context, @NonNull UserHandle user)67 public static void startLocationControllerExtraPackageSettings(@NonNull Context context, 68 @NonNull UserHandle user) { 69 try { 70 context.startActivityAsUser(new Intent( 71 Settings.ACTION_LOCATION_CONTROLLER_EXTRA_PACKAGE_SETTINGS), user); 72 } catch (ActivityNotFoundException e) { 73 // In rare cases where location controller extra package is set, but 74 // no activity exists to handle the location controller extra package settings 75 // intent, log an error instead of crashing permission controller. 76 Log.e(TAG, "No activity to handle " 77 + "android.settings.LOCATION_CONTROLLER_EXTRA_PACKAGE_SETTINGS"); 78 } 79 } 80 isLocationEnabled(Context context)81 public static boolean isLocationEnabled(Context context) { 82 return context.getSystemService(LocationManager.class).isLocationEnabled(); 83 } 84 isLocationGroupAndProvider(Context context, String groupName, String packageName)85 public static boolean isLocationGroupAndProvider(Context context, String groupName, 86 String packageName) { 87 return LOCATION_PERMISSION.equals(groupName) 88 && context.getSystemService(LocationManager.class).isProviderPackage(packageName); 89 } 90 isLocationGroupAndControllerExtraPackage(@onNull Context context, @NonNull String groupName, @NonNull String packageName)91 public static boolean isLocationGroupAndControllerExtraPackage(@NonNull Context context, 92 @NonNull String groupName, @NonNull String packageName) { 93 return LOCATION_PERMISSION.equals(groupName) 94 && packageName.equals(context.getSystemService(LocationManager.class) 95 .getExtraLocationControllerPackage()); 96 } 97 98 /** Returns whether the location controller extra package is enabled. */ isExtraLocationControllerPackageEnabled(Context context)99 public static boolean isExtraLocationControllerPackageEnabled(Context context) { 100 try { 101 return context.getSystemService(LocationManager.class) 102 .isExtraLocationControllerPackageEnabled(); 103 } catch (Exception e) { 104 return false; 105 } 106 107 } 108 109 /** 110 * A Listener which responds to enabling or disabling of location on the device 111 */ 112 public interface LocationListener { 113 114 /** 115 * A callback run any time we receive a broadcast stating the location enable state has 116 * changed. 117 * @param enabled Whether or not location is enabled 118 */ onLocationStateChange(boolean enabled)119 void onLocationStateChange(boolean enabled); 120 } 121 122 private static final ArrayList<LocationListener> sLocationListeners = new ArrayList<>(); 123 124 private static BroadcastReceiver sLocationBroadcastReceiver = new BroadcastReceiver() { 125 @Override 126 public void onReceive(Context context, Intent intent) { 127 boolean isEnabled = intent.getBooleanExtra(EXTRA_LOCATION_ENABLED, true); 128 sMainHandler.postDelayed(() -> { 129 synchronized (sLocationListeners) { 130 for (LocationListener l : sLocationListeners) { 131 l.onLocationStateChange(isEnabled); 132 } 133 } 134 }, LOCATION_UPDATE_DELAY_MS); 135 } 136 }; 137 138 /** 139 * Add a LocationListener, which will be notified if the location provider is enabled or 140 * disabled 141 * @param listener the listener to add 142 */ addLocationListener(LocationListener listener)143 public static void addLocationListener(LocationListener listener) { 144 synchronized (sLocationListeners) { 145 boolean wasEmpty = sLocationListeners.isEmpty(); 146 sLocationListeners.add(listener); 147 if (wasEmpty) { 148 IntentFilter intentFilter = new IntentFilter(LocationManager.MODE_CHANGED_ACTION); 149 PermissionControllerApplication.get().getApplicationContext() 150 .registerReceiverForAllUsers(sLocationBroadcastReceiver, intentFilter, 151 null, null); 152 } 153 } 154 } 155 156 /** 157 * Remove a LocationListener 158 * @param listener The listener to remove 159 * 160 * @return True if it was successfully removed, false otherwise 161 */ removeLocationListener(LocationListener listener)162 public static boolean removeLocationListener(LocationListener listener) { 163 synchronized (sLocationListeners) { 164 boolean success = sLocationListeners.remove(listener); 165 if (success && sLocationListeners.isEmpty()) { 166 PermissionControllerApplication.get().getApplicationContext() 167 .unregisterReceiver(sLocationBroadcastReceiver); 168 } 169 return success; 170 } 171 } 172 } 173