solved issui checkbox state in listview scroll

Checkbox State in custom list.java

// Contructor ()
// StaticVar.java contain 'Expand_State' var
private List<ItemObject> list;
private int current_size;

StaticVar.Expand_State = new boolean[list.size()];
current_size = list.size();
// end Contructor--------------------------------

// @override Getview()
if(current_size != list.size()){
			current_size = list.size();
			boolean[] clone_state = StaticVar.Expand_State.clone();
			StaticVar.Expand_State = new boolean[list.size()];
			for(int i=0;i<clone_state.length;i++){
				// if not out of bound Expand_State && clone_state[i] = true
				if(i < StaticVar.Expand_State.length && clone_state[i]){
					StaticVar.Expand_State[i] = clone_state[i]; 	//  = true
				}
			}
}

// .........some coe here..........//
CheckBox checkbox = (CheckBox)convertView.findViewById(R.id.expand_btn);
checkbox.setOnCheckedChangeListener(new OnCheckedChangeListener() {
			@Override
			public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
				StaticVar.Expand_State[position] = isChecked;
			}
});
checkbox.setChecked(StaticVar.Expand_State[position]);
// end Getview()----------------------------------------------------------------