How to add scrollview to linearlayout programtically.

Archana · by **Archana** » Tue Aug 11, 2009 12:29 pm

Hi,

I am trying to add scrollview to linearlayout but it showing error like
"ScrollView can have only one direct child".. I tried like this
Scrollview scrollview = new ScrollView(context)

linearlayout.removeAllViews();
linearlayout.addview(listview)
scrollView.addView(linearlayout);

Can anybody point out where i am doing mistake.

arams · by **arams** » Wed Aug 12, 2009 6:16 am

hi try this...

class app extends Scrollview{
Linearlayout...
..
.
}

you should keep this in mind...
ScrollView s;
s.add(linearlayout);
s.add(someotherview); if you write like this means it will show error :SCROLLVIEW HAVE DIRECTCHILD

write like this :
s.add(linearlayout);
linearlayout.add(remaining views);

if this dont help for you then,
post Your Complete Code....i will try on that...

Archana · by **Archana** » Wed Aug 12, 2009 6:50 am

Hi,
I tried as you said but it showing this error now

08-12 11:13:46.907: ERROR/AndroidRuntime(1628): java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
I extented class with ScrollView instead of linearlayout

listview.removeAllView();
listView.setListAdapter(adapter);
linearlayout.removeAllViews();
linearlayout.addView(listView);
scrollview.addView(linearlayout);

arams · by **arams** » Wed Aug 12, 2009 9:59 am

Syntax: [ Download ] [ Hide ]

Using java Syntax Highlighting

 
import android.content.Context;
 
import android.widget.Button;
 
import android.widget.LinearLayout;
 
import android.widget.ScrollView;
 
public class TestScroll extends ScrollView {
 
        public TestScroll(Context context) {
 
                super(context);
 
                LinearLayout l=new LinearLayout(context);
 
                Button b=new Button(context);
 
                b.setText("Works");
 
                l.addView(b);
 
                this.addView(l);
 
                // TODO Auto-generated constructor stub
 
        }
 
}
 
Parsed in 0.013 seconds,  using GeSHi 1.0.8.4

try this

IHeartAndroid · by **IHeartAndroid** » Mon Nov 16, 2009 11:03 am

Hi,
This does not work:

Syntax: [ Download ] [ Hide ]

Using xml Syntax Highlighting

 
<?xml version="1.0" encoding="utf-8"?>
 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 
 android:id="@+id/ll_root"
 
        android:orientation="vertical" android:layout_width="fill_parent"
 
        android:layout_height="fill_parent">
 
      <!-- .. something else .. -->
 
        <my.package.MyScrollView
 
                android:layout_width="fill_parent"
 
          android:layout_height="wrap_content"
 
          >
 
        </my.package.MyScrollView>
 
</LinearLayout>
 
Parsed in 0.001 seconds,  using GeSHi 1.0.8.4

Syntax: [ Download ] [ Hide ]

Using java Syntax Highlighting

 
package my.package;
 
import android.content.Context;
 
import android.util.AttributeSet;
 
import android.widget.Button;
 
import android.widget.LinearLayout;
 
import android.widget.ScrollView;
 
public class MyScrollView extends ScrollView {
 
public MyScrollView(Context context) {
 
        super(context);
 
        removeAllViews();
 
        LinearLayout l=new LinearLayout(context);
 
        Button b=new Button(context);
 
        b.setText("Works");
 
        l.addView(b);
 
        this.addView(l);
 
   }
 
     public MyScrollView(Context context, AttributeSet a) {
 
          super(context,a);
 
          removeAllViews();
 
          LinearLayout l=new LinearLayout(context);
 
          Button b=new Button(context);
 
          b.setText("Works");
 
          l.addView(b);
 
          l.addView(b);l.addView(b);l.addView(b);l.addView(b);l.addView(b);l.addView(b);l.addView(b);l.addView(b);l.addView(b);l.addView(b);l.addView(b);
 
          this.addView(l);
 
     }
 
}
 
Parsed in 0.013 seconds,  using GeSHi 1.0.8.4

java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.

I dont understand this. I add more content to the LinearLayout not to the ScrollView.... ?
And I also call removeAllViews().

How to add scrollview to linearlayout programtically.

How to add scrollview to linearlayout programtically.

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