1 /* 2 * Copyright (C) 2012 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.contacts.util; 18 19 import android.view.View; 20 import android.view.ViewGroup; 21 22 /** 23 * Provides static functions to work with views 24 */ 25 public class ViewUtil { ViewUtil()26 private ViewUtil() {} 27 28 /** 29 * Returns the width as specified in the LayoutParams 30 * @throws IllegalStateException Thrown if the view's width is unknown before a layout pass 31 * s 32 */ getConstantPreLayoutWidth(View view)33 public static int getConstantPreLayoutWidth(View view) { 34 // We haven't been layed out yet, so get the size from the LayoutParams 35 final ViewGroup.LayoutParams p = view.getLayoutParams(); 36 if (p.width < 0) { 37 throw new IllegalStateException("Expecting view's width to be a constant rather " + 38 "than a result of the layout pass"); 39 } 40 return p.width; 41 } 42 } 43