Question

I used the below code to populate screen.But it gives the runtime exception.How to solve this ?

java.lang.IllegalStateException: ScrollView can host only one direct child

My code is:

public class MyClass extends Activity {

ArrayList ALobj;
Handler myHandler;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
context = this;
ALobj=new ArrayList();  
ALobj.add(...);

myHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
  super.handleMessage(msg);   
  ALobj.add(....);
  populate_screen(ALobj);
 }
}

    populate_screen(ArrayList ALobj);

}

private void populate_screen(ArrayList obj){

ScrollView scrl=new ScrollView(context);

    LinearLayout llay=new LinearLayout(context); 
........
..........
............

    scrl.addView(llay);
setContentView(scrl);
}

.....
..........
.............
@Override
public boolean onOptionsItemSelected(MenuItem item) {

switch (item.getItemId()) {
case 1:
Message msg = new Message();
myHandler.sendMessage(msg);
break;
}
return super.onOptionsItemSelected(item);
}
}

Answer 1

Your exception is in the layout you are using under scrollview. You can use only single layout in scrollview not the nested layout……

refer this doc:

http://developer.android.com/reference/android/widget/ScrollView.html