cannot set single choice mode in expandable listview for per child

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Mobile

Android

assume i have 4 groups, each group have 4 childs => i have 16 childs, now i want like this, when i click on a child, it's appear drawableleft (or image view), and if after i click another child, the drawableleft appear on this child and disappear on previous child, that means, it only appaer a drawable left ( much like radio button), thanks 4 your help, ineed urgently, here my snippet code:


child.xml:
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android">xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="40dp"
android:removed="@drawable/e"
android:clickable="true"
android:orientation="vertical"
android:paddingLeft="1dp"
tools:context=".MainActivity" >

<linearlayout> android:layout_width="match_parent"
android:layout_height="39dp"
android:gravity="center_vertical" >

<ImageView
android:id="@+id/childImage"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_margin="5dp"
android:background="@drawable/i"
android:contentDescription="@string/hello_world"
android:visibility="invisible" />

<checkedtextview>
android:id="@+id/textView1"
android:layout_width="wrap_removed"
android:layout_height="wrap_removed"
android:layout_marginLeft="5dp"
android:text="@string/hello_world"
android:textColor="@color/tcl"
android:textSize="14sp"
android:textStyle="bold"
android:drawableLeft="@drawable/pm2" />
pm2.xml

<selector xmlns:android="http://schemas.android.com/apk/res/android" >
<item android:drawable="@drawable/i" xmlns:android="#unknown">
android:state_selected="true"
/>

</selector>

adapter.java
public View getChildView(final int groupPosition, final int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
tempChild = (ArrayList<ObjectTemp>) Childtem.get(groupPosition);
final helperuti he;
if (convertView == null) {
he=new helperuti();
convertView = minflater.inflate(R.layout.childrow, null);
he.tv=(CheckedTextView) convertView.findViewById(R.id.textView1);
he.imv=(ImageView) convertView.findViewById(R.id.childImage);

convertView.setTag(he);
}else{
he=(helperuti) convertView.getTag();
}

he.tv.setText(tempChild.get(childPosition).getTvTitle());
CheckedTextView[] ct; boolean b=he.tv.isSelected();

if(b){

he.imv.setVisibility(ImageView.VISIBLE);
}
else{
he.imv.setVisibility(ImageView.INVISIBLE);
}

final int caox=groupItem.size() * Childtem.size();
convertView.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub

he.tv.setSelected(!he.tv.isSelected());
notifyDataSetChanged();
}
});
return convertView;
}

public class helperuti{
CheckedTextView tv;
ImageView imv;
}

public void setselc(int selc){
this.selc=selc;
notifyDataSetChanged();
}


mainactivity.java

public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ExpandableListView expandbleLis = getExpandableListView();
expandbleLis.setDividerHeight(2);
expandbleLis.setGroupIndicator(null);
expandbleLis.setClickable(true);
getExpandableListView().setTextFilterEnabled(true);
getExpandableListView().setChoiceMode(ExpandableListView.CHOICE_MODE_SINGLE);

getExpandableListView().setItemChecked(0, true);

setGroupData();
setChildGroupData();

final NewAdapter mNewAdapter = new NewAdapter(groupItem, childItem);
mNewAdapter
.setInflater(
(LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE),
this);
getExpandableListView().setAdapter(mNewAdapter);
expandbleLis.setOnChildClickListener(new OnChildClickListener() {

@Override
public boolean onChildClick(ExpandableListView parent, View v,
int groupPosition, int childPosition, long id) {
// TODO Auto-generated method stub
mNewAdapter.setselc(childPosition);
getExpandableListView().setItemChecked(childPosition, true);
return true;
}`
});
}


who need link down project can pm me gmail: coldprince10@gmail.com