get AbsListView Scroll Y - Android User Interface

Android examples for User Interface:ListView

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Description

get AbsListView Scroll Y

Demo Code

/**//from  w w w  .  ja v  a 2 s.c  o  m
 * <pre>
 * Copyright 2015 Soulwolf Ching
 * Copyright 2015 The Android Open Source Project for Universal-PullToZoomView
 *
 * 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.
 * </pre>
 */
//package com.java2s;
import android.view.View;
import android.widget.AbsListView;

public class Main {
    public static int getAbsListViewScrollY(AbsListView view,
            int headerViewCount, int minScrollY) {
        View child = view.getChildAt(0);
        if (child == null) {
            return 0;
        }
        int firstVisiblePosition = view.getFirstVisiblePosition();
        int top = child.getTop();

        int headerHeight = 0;
        if (firstVisiblePosition >= headerViewCount) {
            headerHeight = minScrollY;
        }
        return -top + firstVisiblePosition * child.getHeight()
                + headerHeight;
    }
}

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