/* * Copyright (C) 2018 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.settingslib.utils; import android.content.Context; import android.graphics.drawable.Drawable; import android.graphics.drawable.Icon; import android.support.annotation.VisibleForTesting; import android.support.v4.util.ArrayMap; /** * Icon cache to avoid multiple loads on the same icon. */ public class IconCache { private final Context mContext; @VisibleForTesting final ArrayMap mMap = new ArrayMap<>(); public IconCache(Context context) { mContext = context; } public Drawable getIcon(Icon icon) { if (icon == null) { return null; } Drawable drawable = mMap.get(icon); if (drawable == null) { drawable = icon.loadDrawable(mContext); updateIcon(icon, drawable); } return drawable; } public void updateIcon(Icon icon, Drawable drawable) { mMap.put(icon, drawable); } }