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 17 package com.android.tv.ui; 18 19 import android.util.Log; 20 import android.view.View; 21 22 import java.lang.reflect.InvocationTargetException; 23 import java.lang.reflect.Method; 24 25 /** 26 * A class that includes convenience methods for view classes. 27 */ 28 public class ViewUtils { 29 private static final String TAG = "ViewUtils"; 30 ViewUtils()31 private ViewUtils() { 32 // Prevent instantiation. 33 } 34 setTransitionAlpha(View v, float alpha)35 public static void setTransitionAlpha(View v, float alpha) { 36 Method method; 37 try { 38 method = View.class.getDeclaredMethod("setTransitionAlpha", Float.TYPE); 39 method.invoke(v, alpha); 40 } catch (NoSuchMethodException|IllegalAccessException|IllegalArgumentException 41 |InvocationTargetException e) { 42 Log.e(TAG, "Fail to call View.setTransitionAlpha", e); 43 } 44 } 45 } 46