src/com/android/contacts/util/ViewUtil.java

/*
 * Copyright (C) 2012 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 com.android.contacts.util;

import android.view.View;
import android.view.ViewGroup;

/**
 * Provides static functions to work with views
 */
public class ViewUtil {
    private ViewUtil() {}

    /**
     * Returns the width as specified in the LayoutParams
     * @throws IllegalStateException Thrown if the view's width is unknown before a layout pass
     * s
     */
    public static int getConstantPreLayoutWidth(View view) {
        // We haven't been layed out yet, so get the size from the LayoutParams
        final ViewGroup.LayoutParams p = view.getLayoutParams();
        if (p.width < 0) {
            throw new IllegalStateException("Expecting view's width to be a constant rather " +
                    "than a result of the layout pass");
        }
        return p.width;
    }
}