我制作了一个自定义Viewgroup,我需要在我的应用程序中使用它,但我需要将它放在ScrollView中.当只使用我的自定义ViewGroup进行布局时,一切正常,但是当我把它放在ScrollView中时,我看不到任何东西.
我的布局：
我的布局：
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/scrollView1"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<com.example.test.CustomLayout
android:id="@+id/layout"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</com.example.test.CustomLayout>
</ScrollView>
我的观点组：
protected void onMeasure(int widthMeasureSpec,int heightMeasureSpec){
super.onMeasure(widthMeasureSpec,heightMeasureSpec);
/* do something and call for each child
View v = getChildAt(i);
v.measure(wspec,hspec);
*/
setMeasuredDimension(getDefaultSize(getSuggestedMinimumWidth(),widthMeasureSpec),getDefaultSize(getSuggestedMinimumHeight(),heightMeasureSpec));
}
protected void onLayout(boolean changed,int l,int t,int r,int b) {
// TODO Auto-generated method stub
//do something and call layout on every child
}
更新：
我的CustomLayout类
public class CustomLayout extends ViewGroup{
/*My params*/
public CustomLayout(Context context) {
super(context);
// TODO Auto-generated constructor stub
}
public CustomLayout(Context context,AttributeSet attrs) {
super(context,attrs);
}
public CustomLayout(Context context,AttributeSet attrs,int defStyle) {
super(context,attrs,defStyle);
}
@Override
protected void onLayout(boolean changed,int b) {
// TODO Auto-generated method stub
//do something and call layout on every child
}
protected void onMeasure(int widthMeasureSpec,heightMeasureSpec);
/* do something and call for each child
View v = getChildAt(i);
v.measure(wspec,hspec);
*/
setMeasuredDimension(getDefaultSize(getSuggestedMinimumWidth(),heightMeasureSpec));
}
}
更新2：
抱歉,我做了一些其他的尝试,如果我在onMeasure方法的滚动视图中有viewgroup,我得到heightMeasureSpec = 0,然后如果我把viewgroup放在任何其他布局,我得到一个整数.也许这会有所帮助？
解决方法
我明白了,我不得不自己测量Viewgroup,否则我根本没有高度.
所以：
所以：
int heightMeasured = 0;
/*for each child get height and
heightMeasured += childHeight;*/
//If I am in a scrollview i got heightmeasurespec == 0,so
if(heightMeasureSpec == 0){
heightMeasureSpec = MeasureSpec.makeMeasureSpec(heightMeasured,MeasureSpec.AT_MOST);
}
setMeasuredDimension(getDefaultSize(getSuggestedMinimumWidth(),getDefaultSize(this.getSuggestedMinimumHeight(),heightMeasureSpec));
现在对我来说它有效.
