How to make the first item of a ListView to be selected as default at startup?

Question

There is a ListView in my App and the ListView has a selector. I want to make the first item of this ListView to be selected as default at the very

Answer 1

You can fix it like this.

//set list adapter, then
lv.setItemChecked(1, true);//position 1
lv.setSelection(1);//position 1

Update XML layout with single choice.

<ListView
    android:id="@+id/lv"
    android:layout_width="match_parent"
    android:layout_height="match_parent"  
    android:background="@drawable/list_item_background"
    android:cacheColorHint="#FFFFFF"
    android:choiceMode="singleChoice"
    android:dividerHeight="1dip" >
</ListView>

and set listview background XML as list_item_background.xml,

<?xml version="1.0" encoding="utf-8"?>
     <selector xmlns:android="http://schemas.android.com/apk/res/android">
     <item android:drawable="@drawable/bg_list_default"   android:state_activated="false"/>
     <item android:drawable="@drawable/bg_list_pressed" android:state_pressed="true"/>
     <item android:drawable="@drawable/bg_list_pressed" android:state_activated="true"/>

Answer 2

I have used data binding to solve this,

using the following codebehind:

private List<Unit> _units;
private Unit _selectedUnit;
public Unit selectedUnit{
  get{
    if (_selectedUnit is null){
      return _units.Count > 0 ? _units[0] : null;
    }else{
      return _selectedUnit;
    }
  }
  set{
    if (_selectedUnit != value){
      _selectedUnit = value;
      OnPropertyChanged("selectedUnit");
    }
  }
}
public event PropertyChangedEventHandler PropertyChanged;
protected virtual void OnPropertyChanged(string propertyName){
  var changed = PropertyChanged;
  if (changed != null){
    PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
  }
}

and XAML

<ListView ItemsSource="{Binding units}"
          SelectedItem="{Binding selectedUnit, Mode=TwoWay}">

Answer 3

Below solution works for me:

Setting background/View Id on get View & using the setOnItemClickListener of the List View

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    View v = convertView;
    if (v == null) {
        LayoutInflater vi = (LayoutInflater)
                ctx.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        v = vi.inflate(R.layout.listitems, null);
    }
    ListItem m = items.get(position);

    if (m != null) {

        TextView txt = (TextView)v.findViewById(R.id.textView);
        txt.setText(m.Item);

    }

    // set selected item
    LinearLayout ActiveItem = (LinearLayout) v;
    v.setId(position);
    if (position == GetDeviceDetails.selectedsize)
    {
        ActiveItem.setBackgroundColor(0xFF7F8184);
    }
    return v;
}

In the Activity on Create :

listView1.setOnItemClickListener(
            new AdapterView.OnItemClickListener() {
                public void onItemClick(AdapterView<?> adapter, View v, int position, long id) {
                    adapter.findViewById(GetDeviceDetails.selectedsize).setBackgroundColor(0xFFFFFFF);
                    GetDeviceDetails.selectedsize = position;
                    adapter.findViewById(position).setBackgroundColor(0xFF7F8184);
                    Log.d("Selected Id", "" + v.getId());
                    Log.d("find Selected Id", "" + adapter.findViewById(0));
                }
            });
    listView1.setSelection(0);
    listView1.setItemChecked(0, true);

Answer 4

//put the below code in get view function 
if(position==0)
{
    convertView.setSelected(true); 
}

Answer 5

This work for me. I hope this will help you. :)

 @Override
    public View getView(int position, View convertView, ViewGroup parent) {

    // do someting...
    if(position == 0){
        mListView.performItemClick(convertView, 0, 0);
    }

 }

now i found another good way to implement this.

• Firstly,you should set ListView android:choiceMode=singleChoice

• Secondly,just go ahead as follow,

      int defaultPositon = 0;
      int justIgnoreId = 0;
      mListView.setItemChecked(defaultPositon, true);
      mListView.performItemClick(mListView.getSelectedView(), defaultPositon, justIgnoreId);
  

Answer 6

yourlist.setItemChecked(position,true)