get First Visible Line from ScrollView - Android User Interface

Android examples for User Interface:ScrollView

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Description

get First Visible Line from ScrollView

Demo Code

/*/*from w  w  w  .jav a2 s  .  c om*/
 * Copyright (C) 2014 Vlad Mihalachi
 *
 * This file is part of Turbo Editor.
 *
 * Turbo Editor is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Turbo Editor is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
//package com.java2s;

import android.widget.ScrollView;

public class Main {
    public static int getFirstVisibleLine(ScrollView scrollView,
            int childHeight, int lineCount) throws ArithmeticException {
        int line = (scrollView.getScrollY() * lineCount) / childHeight;
        if (line < 0)
            line = 0;
        return line;
    }
}

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