ViewUtils.java revision 816a4be1a0f34f6a48877c8afd3dbbca19eac435 
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 com.android.tv.ui;
18
19import android.util.Log;
20import android.view.View;
21
22import java.lang.reflect.InvocationTargetException;
23import java.lang.reflect.Method;
24
25/**
26 * A class that includes convenience methods for view classes.
27 */
28public class ViewUtils {
29    private static final String TAG = "ViewUtils";
30
31    private ViewUtils() {
32        // Prevent instantiation.
33    }
34
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