| /* |
| * Copyright (C) 2019 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 android.graphics.drawable; |
| |
| import com.android.tools.layoutlib.annotations.LayoutlibDelegate; |
| |
| import android.content.res.Resources_Delegate; |
| import android.util.LruCache; |
| import android.view.InflateException; |
| |
| import java.lang.reflect.Constructor; |
| |
| public class DrawableInflater_Delegate { |
| private static final LruCache<String, Constructor<? extends Drawable>> CONSTRUCTOR_MAP = |
| new LruCache<>(20); |
| |
| /** |
| * This is identical to the original method except that it uses LayoutlibCallback to |
| * load the drawable class, which enables loading custom drawables from the project. |
| */ |
| @LayoutlibDelegate |
| /* package */ static Drawable inflateFromClass(DrawableInflater thisInflater, |
| String className) { |
| try { |
| Constructor<? extends Drawable> constructor; |
| synchronized (CONSTRUCTOR_MAP) { |
| constructor = CONSTRUCTOR_MAP.get(className); |
| if (constructor == null) { |
| final Class<? extends Drawable> clazz = |
| Resources_Delegate.getLayoutlibCallback(thisInflater.mRes) |
| .findClass(className).asSubclass(Drawable.class); |
| constructor = clazz.getConstructor(); |
| CONSTRUCTOR_MAP.put(className, constructor); |
| } |
| } |
| return constructor.newInstance(); |
| } catch (NoSuchMethodException e) { |
| final InflateException ie = new InflateException("Error inflating class " + className); |
| ie.initCause(e); |
| throw ie; |
| } catch (ClassCastException e) { |
| // If loaded class is not a Drawable subclass. |
| final InflateException ie = |
| new InflateException("Class is not a Drawable " + className); |
| ie.initCause(e); |
| throw ie; |
| } catch (ClassNotFoundException e) { |
| // If loadClass fails, we should propagate the exception. |
| final InflateException ie = new InflateException("Class not found " + className); |
| ie.initCause(e); |
| throw ie; |
| } catch (Exception e) { |
| final InflateException ie = new InflateException("Error inflating class " + className); |
| ie.initCause(e); |
| throw ie; |
| } |
| } |
| |
| public static void clearConstructorCache() { |
| CONSTRUCTOR_MAP.evictAll(); |
| } |
| } |