set ListView height - Android User Interface

Android examples for User Interface:ListView

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Description

set ListView height

Demo Code


//package com.java2s;

import android.view.View;

import android.view.ViewGroup;
import android.widget.AbsListView;

import android.widget.ListAdapter;
import android.widget.ListView;

import android.widget.RelativeLayout.LayoutParams;

public class Main {
    /**//from  www.jav  a  2  s.  c o  m
     * set ListView height which is calculated by
     * {@link # getListViewHeightBasedOnChildren(ListView)}
     *
     * @param view
     * @return
     */
    public static void setListViewHeightBasedOnChildren(ListView view) {
        setViewHeight(view, getListViewHeightBasedOnChildren(view));
    }

    /**
     * set view height
     *
     * @param view
     * @param height
     */
    public static void setViewHeight(View view, int height) {
        if (view == null) {
            return;
        }

        ViewGroup.LayoutParams params = view.getLayoutParams();
        params.height = height;
    }

    /**
     * get ListView height according to every children
     *
     * @param view
     * @return
     */
    public static int getListViewHeightBasedOnChildren(ListView view) {
        int height = getAbsListViewHeightBasedOnChildren(view);
        ListAdapter adapter;
        int adapterCount;
        if (view != null && (adapter = view.getAdapter()) != null
                && (adapterCount = adapter.getCount()) > 0) {
            height += view.getDividerHeight() * (adapterCount - 1);
        }
        return height;
    }

    /**
     * get AbsListView height according to every children
     *
     * @param view
     * @return
     */
    public static int getAbsListViewHeightBasedOnChildren(AbsListView view) {
        ListAdapter adapter;
        if (view == null || (adapter = view.getAdapter()) == null) {
            return 0;
        }

        int height = 0;
        for (int i = 0; i < adapter.getCount(); i++) {
            View item = adapter.getView(i, null, view);
            if (item instanceof ViewGroup) {
                item.setLayoutParams(new LayoutParams(
                        LayoutParams.WRAP_CONTENT,
                        LayoutParams.WRAP_CONTENT));
            }
            item.measure(0, 0);
            height += item.getMeasuredHeight();
        }
        height += view.getPaddingTop() + view.getPaddingBottom();
        return height;
    }
}

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