Java – Android – Make ScrollView with LinearLayout

I want to make a ScrollView with LinearLayout. The linear layout contains 6 View … Here is the code:

public class TouchActivity extends Activity
{
    TouchedView TouchView;

public void onCreate(Bundle icicle) 
    {
        super.onCreate(icicle);

TouchView = new TouchedView(this);
        TouchView.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT , LayoutParams.WRAP_CONTENT) );

setContentView(TouchView);
        setContentView(TouchView.ViewLayout);
    }

class TouchedView extends ScrollView
    {
        LinearLayout ViewLayout;
        ListElement Elem1;
        ListElement Elem2;
        ListElement Elem3;
        ListElement Elem4;
        ListElement Elem5;
        ListElement Elem6;

public TouchedView(Context context) 
        {
            super(context);

ViewLayout = new TableLayout(TouchActivity.this);
            ViewLayout.setOrientation(LinearLayout.VERTICAL);

Elem1 = new ListElement(TouchActivity.this , "CYAN");
            Elem1.setLayoutParams(new TableLayout.LayoutParams(LayoutParams.MATCH_PARENT , 100 ) );
            Elem2 = new ListElement(TouchActivity.this , "BLUE");
            Elem2.setLayoutParams(new TableLayout.LayoutParams(LayoutParams.MATCH_PARENT , 100 ) );
            Elem3 = new ListElement(TouchActivity.this , "CYAN");
            Elem3.setLayoutParams(new TableLayout.LayoutParams(LayoutParams.MATCH_PARENT , 100 ) );
            Elem4 = new ListElement(TouchActivity.this , "BLUE");
            Elem4.setLayoutParams(new TableLayout.LayoutParams(LayoutParams.MATCH_PARENT , 100 ) );
            Elem5 = new ListElement(TouchActivity.this , "CYAN");
            Elem5.setLayoutParams(new TableLayout.LayoutParams(LayoutParams.MATCH_PARENT , 100 ) );
            Elem6 = new ListElement(TouchActivity.this , "BLUE");
            Elem6.setLayoutParams(new TableLayout.LayoutParams(LayoutParams.MATCH_PARENT , 100 ) );

ViewLayout.addView(Elem1);
            ViewLayout.addView(Elem2);
            ViewLayout.addView(Elem3);
            ViewLayout.addView(Elem4);
            ViewLayout.addView(Elem5);
            ViewLayout.addView(Elem6);

setFillViewport(false);
            setContentView(ViewLayout);

}

}

class ListElement extends View
    {
        public ListElement(Context context , String TypeName) 
        {
            super(context);

if(TypeName.compareTo("CYAN") == 0) this.setBackgroundColor(Color.CYAN);

if(TypeName.compareTo("BLUE") == 0) this.setBackgroundColor(Color.BLUE);    
        }
    }
}

The result is that 6 Views are too large to be included in LinearLayout:

http://img513.imageshack.us/img513/5406/androidbadscrollview2.jpg

But if I comment setContentView(TouchView.ViewLayout); And I uncomment setContentView(TouchView); My activity should be full of ScrollView instead of LinearLayout, but sadly I don’t see anything.

Note that the ScrollView contains a file created by setContentView(ViewLayout); LinearLayout;

See also http://www.vogella.com/articles/Android/article.html#gridlayout_scrollview

You can declare any child you want, not a TextView.
The important thing is that your scrollview has only one chield (i.e. linearLayout).
Also, you should always write as many layouts as possible in XML!

<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:fillViewport="true"
    android:orientation="vertical" >

<LinearLayout
        android:id="@+id/LinearLayout01"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical" >

<TextView
            android:id="@+id/TextView01"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="This is a header">
        </TextView>

</LinearLayout>

</ScrollView>