Android 中 GridView嵌套在ScrollView里只有一行的解决方法

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);
}

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); 
} 
}

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); 
} 
}

<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" />