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 android.support.v7.widget; 18 19import android.content.Context; 20import android.content.res.Resources; 21import android.graphics.drawable.Drawable; 22import android.support.annotation.NonNull; 23 24import java.lang.ref.WeakReference; 25 26/** 27 * This class allows us to intercept calls so that we can tint resources (if applicable). 28 */ 29class TintResources extends ResourcesWrapper { 30 31 private final WeakReference<Context> mContextRef; 32 33 public TintResources(@NonNull Context context, @NonNull final Resources res) { 34 super(res); 35 mContextRef = new WeakReference<>(context); 36 } 37 38 /** 39 * We intercept this call so that we tint the result (if applicable). This is needed for 40 * things like {@link android.graphics.drawable.DrawableContainer}s which can retrieve 41 * their children via this method. 42 */ 43 @Override 44 public Drawable getDrawable(int id) throws NotFoundException { 45 Drawable d = super.getDrawable(id); 46 Context context = mContextRef.get(); 47 if (d != null && context != null) { 48 AppCompatDrawableManager.get().tintDrawableUsingColorFilter(context, id, d); 49 } 50 return d; 51 } 52}