1 /* 2 * Copyright (C) 2020 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.tools.idea.validator.hierarchy; 18 19 import com.android.ide.common.rendering.api.LayoutlibCallback; 20 21 import android.view.View; 22 import android.widget.Checkable; 23 24 import java.lang.reflect.InvocationTargetException; 25 import java.lang.reflect.Method; 26 27 /** Helper for support lib dependencies. */ 28 public class CustomHierarchyHelper { 29 public static LayoutlibCallback sLayoutlibCallback; 30 31 /** Get the class instance from the studio based on the string class name. */ getClassByName(String className)32 public static Class<?> getClassByName(String className) { 33 try { 34 return sLayoutlibCallback.findClass(className); 35 } catch (ClassNotFoundException ignore) { 36 } 37 return null; 38 } 39 40 /** Returns true if the view is of {@link Checkable} instance. False otherwise. */ isCheckable(View fromView)41 public static boolean isCheckable(View fromView) { 42 LayoutlibCallback callback = sLayoutlibCallback; 43 if (callback == null) { 44 return false; 45 } 46 47 try { 48 // This is required as layoutlib does not know the support library such as 49 // MaterialButton. LayoutlibCallback calls for studio which understands all the maven 50 // pulled library. 51 Class button = callback.findClass( 52 "com.google.android.material.button.MaterialButton"); 53 if (button.isInstance(fromView)) { 54 Method isCheckable = button.getMethod("isCheckable"); 55 Object toReturn = isCheckable.invoke(fromView); 56 return (toReturn instanceof Boolean) && ((Boolean) toReturn); 57 } 58 } catch (ClassNotFoundException | 59 NoSuchMethodException | 60 IllegalAccessException | 61 InvocationTargetException ignore) { 62 } 63 return fromView instanceof Checkable; 64 } 65 } 66