【Android】ScrollView和ListView、GridView冲突(转)

方法1、网上很多流行的方法，先测量listview或gridview的高度，然后再scrollview中设为定值

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public static void setListViewHeightBasedOnChildren(ListView listView) {
        ListAdapter listAdapter = listView.getAdapter();
        if (listAdapter == null) {
            listView.setVisibility(View.GONE);
            return;
        }

        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();
        }

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

这个方法好像只能测量list item为linearlayout为根布局的情况（因为其他的Layout(如RelativeLayout)没有重写onMeasure()，所以会在onMeasure()时抛出异常），比较容易才出现测量不准，和一些未知错误。

方法2、网上流行的另一种方法

1.在ScrollView中添加一属性 android:fillViewport="true" ，这样就可以让ListView全屏显示了

2.指定ListView的高度 android:layout_height="420dp" ;

 

方法3、重写listview或gridview（个人认为最好的方法，也是我一直在用的）

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package com.caiying.idota.view;

import android.content.Context;
import android.util.AttributeSet;
import android.widget.GridView;

public class MultiGridView extends GridView {
    public MultiGridView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public MultiGridView(Context context) {
        super(context);
    }

    public MultiGridView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    @Override
    public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

        int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2,
                MeasureSpec.AT_MOST);
        super.onMeasure(widthMeasureSpec, expandSpec);
    }

}

 

 

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package com.caiying.idota.view;

import android.content.Context;
import android.util.AttributeSet;
import android.widget.ListView;

public class MultiListView extends ListView {
    public MultiListView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public MultiListView(Context context) {
        super(context);
    }

    public MultiListView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    @Override
    public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

        int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2,
                MeasureSpec.AT_MOST);
        super.onMeasure(widthMeasureSpec, expandSpec);
    }

}