Question

我知道“不要将ListView放入ScrollView”这是一个非常糟糕的做法，因为ListView拥有它自己的滚动。但是，除了ListView，我还有其他几个项目（按钮和文本视图）。对于那些，我肯定需要使用ScrollView。我发现了一些解决方案（http://nex-otaku-en.blogspot.com/2010/12/android-put-listview-in-scrollview.html）以防止崩溃Listview。但是，正如我所说，我需要一个ScrollView，它封装了我的XML表单上的所有项目。我已经添加了我的xml代码，请指导如何实现这一点。

   <ScrollView
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent" >  
<LinearLayout 

    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <ListView
        android:id="@+id/listView1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:choiceMode="singleChoice">
    </ListView>


    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal" >
     <Button
        android:id="@+id/button1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Button1" />
      </LinearLayout>

       <TextView
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/longtext" />

</LinearLayout>
</ScrollView>

Answer 1

ListView本身是可滚动的。不要将ListView放在滚动视图中。

将您的ListView移到scorllview之外。您还可以在列表视图中添加页眉和页脚。

通过谷歌检查视频

https://www.youtube.com/watch?v=wDBM6wVEO70

Answer 2

我从另一篇帖子中找到了这个解决方案。发现它有效。

虽然列表项具有相同的高度时所有其他解决方案都有效，但即使列表项的高度可变，此解决方案仍可提供完美的结果。 / p>

在xml＆amp;中使用此自定义类你很高兴。

public class NestedListView extends ListView implements OnTouchListener, OnScrollListener { private int listViewTouchAction; private static final int MAXIMUM_LIST_ITEMS_VIEWABLE = 99; public NestedListView(Context context, AttributeSet attrs) { super(context, attrs); listViewTouchAction = -1; setOnScrollListener(this); setOnTouchListener(this); } @Override public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) { if (getAdapter() != null && getAdapter().getCount() > MAXIMUM_LIST_ITEMS_VIEWABLE) { if (listViewTouchAction == MotionEvent.ACTION_MOVE) { scrollBy(0, -1); } } } @Override public void onScrollStateChanged(AbsListView view, int scrollState) { } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); int newHeight = 0; final int heightMode = MeasureSpec.getMode(heightMeasureSpec); int heightSize = MeasureSpec.getSize(heightMeasureSpec); if (heightMode != MeasureSpec.EXACTLY) { ListAdapter listAdapter = getAdapter(); if (listAdapter != null && !listAdapter.isEmpty()) { int listPosition = 0; for (listPosition = 0; listPosition < listAdapter.getCount() && listPosition < MAXIMUM_LIST_ITEMS_VIEWABLE; listPosition++) { View listItem = listAdapter.getView(listPosition, null, this); //now it will not throw a NPE if listItem is a ViewGroup instance if (listItem instanceof ViewGroup) { listItem.setLayoutParams(new LayoutParams( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT)); } listItem.measure(widthMeasureSpec, heightMeasureSpec); newHeight += listItem.getMeasuredHeight(); } newHeight += getDividerHeight() * listPosition; } if ((heightMode == MeasureSpec.AT_MOST) && (newHeight > heightSize)) { if (newHeight > heightSize) { newHeight = heightSize; } } } else { newHeight = getMeasuredHeight(); } setMeasuredDimension(getMeasuredWidth(), newHeight); } @Override public boolean onTouch(View v, MotionEvent event) { if (getAdapter() != null && getAdapter().getCount() > MAXIMUM_LIST_ITEMS_VIEWABLE) { if (listViewTouchAction == MotionEvent.ACTION_MOVE) { scrollBy(0, 1); } } return false; } }

Answer 3

您可以使用Expandable Listview在scrollview中使用listview，它会在内容长度上消耗listview，创建一个名为ExpandableHeightListView的Custom类

package com.knight.utils;

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

public class ExpandableHeightListView extends ListView
{

boolean expanded = false;

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

public ExpandableHeightListView(Context context, AttributeSet attrs)
{
    super(context, attrs);
}

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

public boolean isExpanded()
{
    return expanded;
}

@Override
public void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
{
    // HACK! TAKE THAT ANDROID!
    if (isExpanded())
    {
        // Calculate entire height by providing a very large height hint.
        // But do not use the highest 2 bits of this integer; those are
        // reserved for the MeasureSpec mode.
        int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2, MeasureSpec.AT_MOST);
        super.onMeasure(widthMeasureSpec, expandSpec);

        ViewGroup.LayoutParams params = getLayoutParams();
        params.height = getMeasuredHeight();
    }
    else
    {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    }
}

public void setExpanded(boolean expanded)
{
    this.expanded = expanded;
}
}

之后以编程方式将此行添加到代码中，它会将listview扩展到scrollview的一侧，

Listview listview=(Listview)findviewbyid(R.id.listview1);
((ExpandableHeightListView)listview).setExpandable(true);

Android在ScrollView中添加ListView

3 个答案: