Question

我需要在运行时获得准确的listView高度。

当我使用下面的代码时，每个listItem的高度都不正确。

            int totalHeight = 0;
            for (int i = 0; i < listAdapter.getCount(); i++) {
                View listItem = listAdapter.getView(i, null, listview);
                listItem.measure(0, 0);
                totalHeight += listItem.getMeasuredHeight();
            }
            params.height = totalHeight + listview.getDividerHeight()* (listAdapter.getCount() -1);
            listview.setLayoutParams(params);
            listview.requestLayout();

当我使用getChild版本时，Height准确但总计数已关闭......

        int total = 0;
        for (int i = 0; i < listview.getChildCount(); i++) {
            View childAt = listview.getChildAt(i);
            if (childAt == null)
                continue;

            int childH = childAt.getMeasuredHeight();
            total += childH;
        }
        int div = listview.getDividerHeight();
        total += (div * (listAdapter.getCount() - 1));

        if (params.height != total) {
            getLogger().info("setting measured buttons list to height: " + total);
            params.height = total;
            listview.requestLayout();
            ViewParent parent = listview.getParent();

你遇到过这个问题吗？

Answer 1

如果您只想找到listView的高度，可以使用

listView.post(new Runnable()
{
    public void run()
    {
        listView.getHeight();
    }
});

Answer 2

listItem.measure（0,0）;度量0,0的参数使用第一个参数MeasureSpec.makeMeasureSpec（listWidth，MeasureSpec.EXACTLY）和第二个参数MeasureSpec.makeMeasureSpec（0，MeasureSpec.UNSPECIFIED））遵循此代码

public static void getTotalHeightofListView（ListView listView） {

    ListAdapter mAdapter = listView.getAdapter();

    int totalHeight = 0;
    int listWidth = listView.getMeasuredWidth();

    for (int i = 0; i < mAdapter.getCount(); i++) {
        View mView = mAdapter.getView(i, null, listView);

        mView.measure(
                MeasureSpec.makeMeasureSpec(listWidth, MeasureSpec.EXACTLY),

                MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));

        totalHeight += mView.getMeasuredHeight();
        Log.w("HEIGHT" + i, String.valueOf(totalHeight));

    }

    ViewGroup.LayoutParams params = listView.getLayoutParams();
    params.height = totalHeight
            + (listView.getDividerHeight() * (mAdapter.getCount() - 1));
    listView.setLayoutParams(params);
    listView.requestLayout();

}

Answer 3

使用它，我现在正在使用它并且它100％工作，我正在使用它来制作包含列表的滚动视图。

package com.emercs.android.easyihome.util;

 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.ListAdapter;
 import android.widget.ListView;

 public class Helper {

public static void getListViewSize(ListView myListView) {
    ListAdapter myListAdapter = myListView.getAdapter();
    if (myListAdapter == null) {
        // do nothing return null
        return;
    }
    // set listAdapter in loop for getting final size
    int totalHeight = 0;
    for (int size = 0; size < myListAdapter.getCount(); size++) {
        View listItem = myListAdapter.getView(size, null, myListView);
        if (listItem != null) {
            listItem.measure(0, 0);
            totalHeight += listItem.getMeasuredHeight();
        }
    }
    // setting listview item in adapter
    ViewGroup.LayoutParams params = myListView.getLayoutParams();
    if (params != null) {
        params.height = totalHeight
                + (myListView.getDividerHeight() * (myListAdapter
                        .getCount() - 1));

        myListView.setLayoutParams(params);
        // print height of adapter on log
    }
}
}

检查并添加到listview

   ScrollView scrollViewScenes = (ScrollView) findViewById(R.id.x);

    if (scrollViewScenes != null) {
        Helper.getListViewSize(listview);
    }

希望这有帮助。

如何在运行时获得准确的ListView高度？

3 个答案: