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      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 
     17 package com.android.inputmethod.latin.permissions;
     18 
     19 import android.app.Activity;
     20 import android.content.Context;
     21 import android.content.pm.PackageManager;
     22 import android.os.Build;
     23 import android.support.annotation.NonNull;
     24 import android.support.v4.app.ActivityCompat;
     25 import android.support.v4.content.ContextCompat;
     26 
     27 import java.util.ArrayList;
     28 import java.util.List;
     29 
     30 /**
     31  * Utility class for permissions.
     32  */
     33 public class PermissionsUtil {
     34 
     35     /**
     36      * Returns the list of permissions not granted from the given list of permissions.
     37      * @param context Context
     38      * @param permissions list of permissions to check.
     39      * @return the list of permissions that do not have permission to use.
     40      */
     41     public static List<String> getDeniedPermissions(Context context,
     42                                                           String... permissions) {
     43         final List<String> deniedPermissions = new ArrayList<>();
     44         for (String permission : permissions) {
     45             if (ContextCompat.checkSelfPermission(context, permission)
     46                     != PackageManager.PERMISSION_GRANTED) {
     47                 deniedPermissions.add(permission);
     48             }
     49         }
     50         return deniedPermissions;
     51     }
     52 
     53     /**
     54      * Uses the given activity and requests the user for permissions.
     55      * @param activity activity to use.
     56      * @param requestCode request code/id to use.
     57      * @param permissions String array of permissions that needs to be requested.
     58      */
     59     public static void requestPermissions(Activity activity, int requestCode,
     60                                           String[] permissions) {
     61         ActivityCompat.requestPermissions(activity, permissions, requestCode);
     62     }
     63 
     64     /**
     65      * Checks if all the permissions are granted.
     66      */
     67     public static boolean allGranted(@NonNull int[] grantResults) {
     68         for (int result : grantResults) {
     69             if (result != PackageManager.PERMISSION_GRANTED) {
     70                 return false;
     71             }
     72         }
     73         return true;
     74     }
     75 
     76     /**
     77      * Queries if al the permissions are granted for the given permission strings.
     78      */
     79     public static boolean checkAllPermissionsGranted(Context context, String... permissions) {
     80         if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.LOLLIPOP_MR1) {
     81             // For all pre-M devices, we should have all the premissions granted on install.
     82             return true;
     83         }
     84 
     85         for (String permission : permissions) {
     86             if (ContextCompat.checkSelfPermission(context, permission)
     87                     != PackageManager.PERMISSION_GRANTED) {
     88                 return false;
     89             }
     90         }
     91         return true;
     92     }
     93 }
     94