PermissionsUtil.java revision 4f76e61f8e0a0cf48a0f80fa9ec0ea60adbf536f 
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
17package com.android.contacts.common.util;
18
19import android.Manifest.permission;
20import android.content.Context;
21import android.content.pm.PackageManager;
22
23/**
24 * Utility class to help with runtime permissions.
25 */
26public class PermissionsUtil {
27    // Each permission in this list is a cherry-picked permission from a particular permission
28    // group. Granting a permission group enables access to all permissions in that group so we
29    // only need to check a single permission in each group.
30    // Note: This assumes that the app has correctly requested for all the relevant permissions
31    // in its Manifest file.
32    public static final String PHONE = permission.CALL_PHONE;
33    public static final String CONTACTS = permission.READ_CONTACTS;
34    public static final String LOCATION = permission.ACCESS_FINE_LOCATION;
35
36    private static Boolean sHasPhonePermissions;
37    private static Boolean sHasContactsPermissions;
38    private static Boolean sHasLocationPermissions;
39
40    public static boolean hasPhonePermissions(Context context) {
41        if (sHasPhonePermissions == null) {
42            sHasPhonePermissions = hasPermission(context, PHONE);
43        }
44        return sHasPhonePermissions;
45    }
46
47    public static boolean hasContactsPermissions(Context context) {
48        if (sHasContactsPermissions == null) {
49            sHasContactsPermissions = hasPermission(context, CONTACTS);
50        }
51        return sHasContactsPermissions;
52    }
53
54    public static boolean hasLocationPermissions(Context context) {
55        if (sHasLocationPermissions == null) {
56            sHasLocationPermissions = hasPermission(context, LOCATION);
57        }
58        return sHasLocationPermissions;
59    }
60
61    /**
62     * To be called during various activity lifecycle events to update the cached versions of the
63     * permissions.
64     *
65     * @param context A valid context.
66     */
67    public static void updateCachedPermissions(Context context) {
68        hasPermission(context, PHONE);
69        hasPermission(context, CONTACTS);
70        hasPermission(context, LOCATION);
71    }
72
73    public static boolean hasPermission(Context context, String permission) {
74        return context.checkSelfPermission(permission) == PackageManager.PERMISSION_GRANTED;
75    }
76}
77