Add an OnGlobalLayoutListener for the view. - Android User Interface

Android examples for User Interface:Layout

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Description

Add an OnGlobalLayoutListener for the view.

Demo Code

/*/*from  w  w w . j  a  va2 s  .  c  o  m*/
 * Copyright 2014 Soichiro Kashima
 *
 * 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.java2s;
import android.os.Build;
import android.view.View;
import android.view.ViewTreeObserver;

public class Main {
    /**
     * Add an OnGlobalLayoutListener for the view.
     * <p>This is just a convenience method for using {@code ViewTreeObserver.OnGlobalLayoutListener()}.
     * This also handles removing listener when onGlobalLayout is called.</p>
     *
     * @param view     The target view to add global layout listener.
     * @param runnable Runnable to be executed after the view is laid out.
     */
    public static void addOnGlobalLayoutListener(final View view,
            final Runnable runnable) {
        ViewTreeObserver vto = view.getViewTreeObserver();
        vto.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
            @SuppressWarnings("deprecation")
            @Override
            public void onGlobalLayout() {
                if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN) {
                    view.getViewTreeObserver()
                            .removeGlobalOnLayoutListener(this);
                } else {
                    view.getViewTreeObserver()
                            .removeOnGlobalLayoutListener(this);
                }
                runnable.run();
            }
        });
    }
}

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