时间：2021-11-28 11:30:41 | 栏目：Android代码 | 点击：次
在做android项目中遇到一个bug，GridView嵌套在ScrollView里只有一行的问题。下面小编在网上找到了解决方法，具体方法如下所示：
方法一：就是上面说的通过计算出来ListView或者GridView中的子列高度和 进行显示：
public void setListViewHeightBasedOnChildren(ListView listView) {
ListAdapter listAdapter = listView.getAdapter();
if (listAdapter == null) {
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));
((MarginLayoutParams)params).setMargins(15, 15, 15, 15);
listView.setLayoutParams(params);
}
方法二：重写GridView和ListView的onMeasure方法，直接给它一个足够大的高度：
重写ListView:
public class MyListView extends ListView {
public MyListView(Context context) {
// TODO Auto-generated method stub
super(context);
}
public MyListView(Context context, AttributeSet attrs) {
// TODO Auto-generated method stub
super(context, attrs);
}
public MyListView(Context context, AttributeSet attrs, int defStyle) {
// TODO Auto-generated method stub
super(context, attrs, defStyle);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
// TODO Auto-generated method stub
int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2,
MeasureSpec.AT_MOST);
super.onMeasure(widthMeasureSpec, expandSpec);
}
}
重写GridView:
public class MyGridView extends GridView{
public MyGridView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public MyGridView(Context context) {
super(context);
}
public MyGridView(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);
}
}
xml中的布局：
<com.xxx.MyGridView android:id="@+id/mygridview" android:layout_width="fill_parent" android:layout_height="wrap_content" android:gravity="center" android:horizontalSpacing="5dp" android:numColumns="4" android:stretchMode="columnWidth" android:verticalSpacing="6dp" />