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| 1 // Copyright 2016 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 package org.chromium.components.location; |
| 6 |
| 7 import android.Manifest; |
| 8 import android.content.Context; |
| 9 import android.content.Intent; |
| 10 import android.content.pm.PackageManager; |
| 11 import android.os.Build; |
| 12 import android.os.Process; |
| 13 import android.provider.Settings; |
| 14 import android.text.TextUtils; |
| 15 |
| 16 import org.chromium.base.ThreadUtils; |
| 17 import org.chromium.base.VisibleForTesting; |
| 18 import org.chromium.base.annotations.SuppressFBWarnings; |
| 19 |
| 20 /** |
| 21 * Provides methods for querying Chrome's ability to use Android's location serv
ices. |
| 22 * |
| 23 * This class should be used only on the UI thread. |
| 24 */ |
| 25 public class LocationUtils { |
| 26 // Used to construct sInstance if that's null. |
| 27 private static Factory sFactory; |
| 28 |
| 29 private static LocationUtils sInstance; |
| 30 |
| 31 protected LocationUtils() {} |
| 32 |
| 33 /** |
| 34 * Returns the singleton instance of LocationSettings, creating it if needed
. |
| 35 */ |
| 36 @SuppressFBWarnings("LI_LAZY_INIT_STATIC") |
| 37 public static LocationUtils getInstance() { |
| 38 ThreadUtils.assertOnUiThread(); |
| 39 if (sInstance == null) { |
| 40 if (sFactory == null) { |
| 41 sInstance = new LocationUtils(); |
| 42 } else { |
| 43 sInstance = sFactory.create(); |
| 44 } |
| 45 } |
| 46 return sInstance; |
| 47 } |
| 48 |
| 49 private boolean hasPermission(Context context, String name) { |
| 50 return context.checkPermission(name, Process.myPid(), Process.myUid()) |
| 51 == PackageManager.PERMISSION_GRANTED; |
| 52 } |
| 53 |
| 54 /** |
| 55 * Returns true if Chromium has permission to access location. |
| 56 * |
| 57 * Check both hasAndroidLocationPermission() and isSystemLocationSettingEnab
led() to determine |
| 58 * if Chromium's location requests will return results. |
| 59 */ |
| 60 public boolean hasAndroidLocationPermission(Context context) { |
| 61 return hasPermission(context, Manifest.permission.ACCESS_COARSE_LOCATION
) |
| 62 || hasPermission(context, Manifest.permission.ACCESS_FINE_LOCATI
ON); |
| 63 } |
| 64 |
| 65 /** |
| 66 * Returns whether location services are enabled system-wide, i.e. whether a
ny application is |
| 67 * able to access location. |
| 68 */ |
| 69 public boolean isSystemLocationSettingEnabled(Context context) { |
| 70 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) { |
| 71 return Settings.Secure.getInt(context.getContentResolver(), |
| 72 Settings.Secure.LOCATION_MODE, Settings.Secure.LOCATI
ON_MODE_OFF) |
| 73 != Settings.Secure.LOCATION_MODE_OFF; |
| 74 } else { |
| 75 return !TextUtils.isEmpty(Settings.Secure.getString( |
| 76 context.getContentResolver(), Settings.Secure.LOCATION_PROVI
DERS_ALLOWED)); |
| 77 } |
| 78 } |
| 79 |
| 80 /** |
| 81 * Returns an intent to launch Android Location Settings. |
| 82 */ |
| 83 public Intent getSystemLocationSettingsIntent() { |
| 84 Intent i = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS); |
| 85 i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); |
| 86 return i; |
| 87 } |
| 88 |
| 89 /** |
| 90 * Instantiate this to explain how to create a LocationUtils instance in |
| 91 * LocationUtils.getInstance(). |
| 92 */ |
| 93 public interface Factory { public LocationUtils create(); } |
| 94 |
| 95 /** |
| 96 * Call this to use a different subclass of LocationUtils throughout the pro
gram. |
| 97 * This can be used by embedders in addition to tests. |
| 98 */ |
| 99 @VisibleForTesting |
| 100 public static void setFactory(Factory factory) { |
| 101 sFactory = factory; |
| 102 sInstance = null; |
| 103 } |
| 104 } |
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