Saves the scroll position of a ListView for a refresh - Android User Interface

Android examples for User Interface:ListView

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Description

Saves the scroll position of a ListView for a refresh

Demo Code

/*/*  w  w w. j a v a 2  s . co m*/
 * Copyright 2013 Christian De Angelis
 *
 * 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.util.Pair;
import android.view.View;
import android.widget.ListView;

public class Main {
    /**
     * Saves the scroll position of a ListView for a refresh
     * @param listView the listview to save the position
     * @return a pair of integers, representing the item index, and the view's top
     */
    public static Pair<Integer, Integer> getListViewScroll(
            final ListView listView) {
        int index = listView.getFirstVisiblePosition();
        View v = listView.getChildAt(0);
        int top = ((v == null) ? 0 : v.getTop());

        return new Pair<Integer, Integer>(index, top);
    }
}

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