ScrollView makes a custom layout invisible

Question

I made a custom Viewgroup which i need to use in my application, but i need to put it in a ScrollView. When the layout is made only with my custom ViewGroup everything works fine, but when I put it in a ScrollView i can't see anything. My layout:

<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>

My viewgroup:

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 
    }

UPDATE: My CustomLayout class

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 l, int t, int r, int b) {
        // TODO Auto-generated method stub
            //do something and call layout on every child 
    }

    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));

    }

}

UPDATE 2: Sorry but I made some other tries and it looks like if I have the viewgroup in a scrollview on the onMeasure method i got heightMeasureSpec = 0, then if I put the viewgroup in any other layout, i got an integer. Maybe this would help?

Answer 1

I got it, I had to measure the Viewgroup myself, or else i got no height at all.
So:

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(), widthMeasureSpec), getDefaultSize(this.getSuggestedMinimumHeight(), heightMeasureSpec));

Now for me it works.