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/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.contacts.common.util;
import android.Manifest.permission;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.pm.PackageManager;
import android.support.v4.content.LocalBroadcastManager;
/**
* Utility class to help with runtime permissions.
*/
public class PermissionsUtil {
// Each permission in this list is a cherry-picked permission from a particular permission
// group. Granting a permission group enables access to all permissions in that group so we
// only need to check a single permission in each group.
// Note: This assumes that the app has correctly requested for all the relevant permissions
// in its Manifest file.
public static final String PHONE = permission.CALL_PHONE;
public static final String CONTACTS = permission.READ_CONTACTS;
public static final String LOCATION = permission.ACCESS_FINE_LOCATION;
public static boolean hasPhonePermissions(Context context) {
return hasPermission(context, PHONE);
}
public static boolean hasContactsPermissions(Context context) {
return hasPermission(context, CONTACTS);
}
public static boolean hasLocationPermissions(Context context) {
return hasPermission(context, LOCATION);
}
public static boolean hasPermission(Context context, String permission) {
return context.checkSelfPermission(permission) == PackageManager.PERMISSION_GRANTED;
}
/**
* Rudimentary methods wrapping the use of a LocalBroadcastManager to simplify the process
* of notifying other classes when a particular fragment is notified that a permission is
* granted.
*
* To be notified when a permission has been granted, create a new broadcast receiver
* and register it using {@link #registerPermissionReceiver(Context, BroadcastReceiver, String)}
*
* E.g.
*
* final BroadcastReceiver receiver = new BroadcastReceiver() {
* @Override
* public void onReceive(Context context, Intent intent) {
* refreshContactsView();
* }
* }
*
* PermissionsUtil.registerPermissionReceiver(getActivity(), receiver, READ_CONTACTS);
*
* If you register to listen for multiple permissions, you can identify which permission was
* granted by inspecting {@link Intent#getAction()}.
*
* In the fragment that requests for the permission, be sure to call
* {@link #notifyPermissionGranted(Context, String)} when the permission is granted so that
* any interested listeners are notified of the change.
*/
public static void registerPermissionReceiver(Context context, BroadcastReceiver receiver,
String permission) {
final IntentFilter filter = new IntentFilter(permission);
LocalBroadcastManager.getInstance(context).registerReceiver(receiver, filter);
}
public static void unregisterPermissionReceiver(Context context, BroadcastReceiver receiver) {
LocalBroadcastManager.getInstance(context).unregisterReceiver(receiver);
}
public static void notifyPermissionGranted(Context context, String permission) {
final Intent intent = new Intent(permission);
LocalBroadcastManager.getInstance(context).sendBroadcast(intent);
}
}
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