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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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