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      1 /*
      2  * Copyright (C) 2017 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.settings.deviceinfo.storage;
     18 
     19 import android.content.Context;
     20 import android.content.pm.UserInfo;
     21 import android.graphics.drawable.Drawable;
     22 import android.os.UserManager;
     23 import android.util.Log;
     24 import android.util.SparseArray;
     25 
     26 import com.android.internal.util.Preconditions;
     27 import com.android.settings.Utils;
     28 import com.android.settingslib.utils.AsyncLoader;
     29 
     30 /**
     31  * Fetches a user icon as a loader using a given icon loading lambda.
     32  */
     33 public class UserIconLoader extends AsyncLoader<SparseArray<Drawable>> {
     34     private FetchUserIconTask mTask;
     35 
     36     /**
     37      * Task to load all user icons.
     38      */
     39     public interface FetchUserIconTask {
     40         SparseArray<Drawable> getUserIcons();
     41     }
     42 
     43     /**
     44      * Handle the output of this task.
     45      */
     46     public interface UserIconHandler {
     47         void handleUserIcons(SparseArray<Drawable> fetchedIcons);
     48     }
     49 
     50     public UserIconLoader(Context context, FetchUserIconTask task) {
     51         super(context);
     52         mTask = Preconditions.checkNotNull(task);
     53     }
     54 
     55     @Override
     56     public SparseArray<Drawable> loadInBackground() {
     57         return mTask.getUserIcons();
     58     }
     59 
     60     @Override
     61     protected void onDiscardResult(SparseArray<Drawable> result) {}
     62 
     63     /**
     64      * Loads the user icons using a given context. This returns a {@link SparseArray} which maps
     65      * user ids to their user icons.
     66      */
     67     public static SparseArray<Drawable> loadUserIconsWithContext(Context context) {
     68         SparseArray<Drawable> value = new SparseArray<>();
     69         UserManager um = context.getSystemService(UserManager.class);
     70         for (UserInfo userInfo : um.getUsers()) {
     71             value.put(userInfo.id, Utils.getUserIcon(context, um, userInfo));
     72         }
     73         return value;
     74     }
     75 }
     76