c#androidxamarinxamarin.android
How to update values and selected index in Alert Dialog builder setSingleChoiceItems
This is the adapter that i am using and you can see my view inflating from custom layout and the problem here is that after clicking/pressing an item, it wont process to my Item_Selected method thats why I added a custom onClick but the problem is that I wont close the spinner after click. Badly needs help
{
public class CustomSpinnerAdapter : ArrayAdapter<String> {
String type = String.Empty;
List<string> orderList = new List<string>();
Context context;
PageTaskSearchView pageTaskSearchView = new PageTaskSearchView();
String WCName = String.Empty;
Bundle utilBundle;
View viewPageTask;
/// <summary>
/// CUstom Spinner Array Adapter constructor
/// </summary>
/// <returns></returns>
public CustomSpinnerAdapter(Context context, int textViewResourceId, List<String> objects, String type, Bundle utilBundle, View view)
: base(context, textViewResourceId, objects) {
this.type = type;
this.orderList = objects;
this.context = context;
this.utilBundle = utilBundle;
this.viewPageTask = view;
}
/// <summary>
/// returns the total array count minus one
/// </summary>
/// <returns>int</returns>
public override int Count
{
get
{
return base.Count;
}
}
public override View GetDropDownView(int position, View convertView, ViewGroup parent)
{
return getCustomView(position, convertView, parent);
}
public override View GetView(int position, View convertView, ViewGroup parent)
{
return getCustomView(position, convertView, parent);
}
public View getCustomView(int position, View convertView, ViewGroup parent)
{
LayoutInflater inflater = (LayoutInflater)Context.GetSystemService(Context.LayoutInflaterService);
var view = convertView;
if (position == 0)
{
if(Constants.ORDER_LIST == type) {
view = inflater.Inflate(Resource.Layout.CustomSpinnerView, null, true);
Switch filterOrder = (Switch) view.FindViewById(Resource.Id.switch_filterOrder);
int isFiltered = utilBundle.GetInt(Constants.ORDER_SWITCH_TRIGGER, 0);
filterOrder.Checked = Constants.ORDER_SWITCH_CLOSED == isFiltered;
filterOrder.CheckedChange += delegate (object sender, CompoundButton.CheckedChangeEventArgs e)
{
int filterStatus = e.IsChecked ? Constants.ORDER_SWITCH_CLOSED : 0;
utilBundle.PutInt(Constants.ORDER_SWITCH_TRIGGER, filterStatus);
String workCenter = utilBundle.GetString(Constants.WCName, Constants.EMPTY_STRING);
orderList = pageTaskSearchView.retrieveOrderlist(workCenter);
base.Clear();
base.AddAll(orderList);
base.NotifyDataSetChanged();
};
}
else
{
LinearLayout.LayoutParams layoutparams = new LinearLayout.LayoutParams(0, 0);
view = base.GetDropDownView(position, convertView, parent);
TextView tv = (TextView)view;
tv.SetHeight(0);
tv.LayoutParameters = layoutparams;
tv.Visibility = ViewStates.Gone;
view = tv;
}
}
else
{
if (Constants.ORDER_LIST == type)
{
view = inflater.Inflate(Resource.Layout.ListItemWithCheckbox, parent, false);
LinearLayout layout = (LinearLayout)view.FindViewById(Resource.Id.orderLayout);
TextView orderId = (TextView)view.FindViewById(Resource.Id.listItem);
RadioButton selected = view.FindViewById<RadioButton>(Resource.Id.checkedRadio);
selected.Checked = utilBundle.GetString(Constants.SELECTED_ORDER_ID, Constants.EMPTY_STRING).Equals(orderList[position]);
orderId.Text = orderList[position];
return view;
//view.Click += delegate (object sender, EventArgs e)
//{
// PageTaskSearchViewModel pageTaskSearchViewModel = new PageTaskSearchViewModel(this.Context, this.viewPageTask, null, utilBundle);
// pageTaskSearchViewModel.setOrderText(orderList[position]);
//};
}
else
{
view = base.GetDropDownView(position, null, parent);
}
}
parent.VerticalScrollBarEnabled = false;
return view;
}
}
}
This is my item selected method, but after pressing an item, it wont proceed to this method.
spinnerSelected = (TextView)view.FindViewById(Resource.Id.inp_workOrder);
String selected = (String)spinner.GetItemAtPosition(e.Position);
spinnerSelected.Text = selected;
Solution
Your CustomSpinnerAdapter can contain a Update method to reload data for adapter as follow :
public class CustomSpinnerAdapter : BaseAdapter
{
Context context;
List<string> list;
public CustomSpinnerAdapter(Context context, List<string> list)
{
this.context = context;
this.list = new List<string>();
this.list.AddRange(list) ;
}
public override Java.Lang.Object GetItem(int position)
{
return list[position];
}
public void Update(List<string> newList)
{
list.Clear();
list.AddRange(newList);
NotifyDataSetChanged();
}
public override long GetItemId(int position)
{
return position;
}
public override View GetView(int position, View convertView, ViewGroup parent)
{
//return base.GetDropDownView(position, convertView, parent);
var view = convertView;
CustomSpinnerAdapterViewHolder holder = null;
if (view != null)
holder = view.Tag as CustomSpinnerAdapterViewHolder;
if (holder == null)
{
holder = new CustomSpinnerAdapterViewHolder();
var inflater = context.GetSystemService(Context.LayoutInflaterService).JavaCast<LayoutInflater>();
//replace with your item and your holder items
//comment back in
view = inflater.Inflate(Resource.Layout.Itemlayout, parent, false);
holder.Title = view.FindViewById<TextView>(Resource.Id.textView1);
view.Tag = holder;
holder.Title.Text = GetItem(position).ToString();
}
//fill in your items
return view;
}
public override View GetDropDownView(int position, View convertView, ViewGroup parent)
{
//return base.GetDropDownView(position, convertView, parent);
var view = convertView;
CustomSpinnerAdapterViewHolder holder = null;
if (view != null)
holder = view.Tag as CustomSpinnerAdapterViewHolder;
if (holder == null)
{
holder = new CustomSpinnerAdapterViewHolder();
var inflater = context.GetSystemService(Context.LayoutInflaterService).JavaCast<LayoutInflater>();
//replace with your item and your holder items
//comment back in
view = inflater.Inflate(Resource.Layout.layoutDrop, parent, false);
holder.Title = view.FindViewById<TextView>(Resource.Id.textView1);
view.Tag = holder;
holder.Title.Text = list[position];
}
//fill in your items
return view;
}
//Fill in cound here, currently 0
public override int Count
{
get
{
return list.Count;
}
}
}
class CustomSpinnerAdapterViewHolder : Java.Lang.Object
{
//Your adapter views to re-use
public TextView Title { get; set; }
}
In Activity , init CustomSpinnerAdapter for Spinner :
customAdapter = new CustomSpinnerAdapter(this, planetNames);
spinner.Adapter = customAdapter;
spinner.ItemSelected += new EventHandler<AdapterView.ItemSelectedEventArgs>(spinner_ItemSelected);
Then in ItemSelected method , when modifying data , you can invoke Update Method :
private void spinner_ItemSelected(object sender, AdapterView.ItemSelectedEventArgs e)
{
Spinner spinner = (Spinner)sender;
string toast = string.Format("The planet is {0}", spinner.GetItemAtPosition(e.Position));
Toast.MakeText(this, toast, ToastLength.Long).Show();
if (isFirstShow)
{
isFirstShow = false;
return;
}
Android.App.AlertDialog.Builder dialog = new Android.App.AlertDialog.Builder(this);
Android.App.AlertDialog alert = dialog.Create();
alert.SetTitle("Title");
alert.SetMessage("Change data for spinner !");
alert.SetButton("OK", (c, ev) =>
{
// Ok button click task
planetNames[e.Position] = "new data";
customAdapter.Update(planetNames);
Console.WriteLine("Modified!");
});
alert.Show();
}
The effect as follow :
================================Update==================================
Itemlayout.xml : Spinner undropdown view
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:text="getView()"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:minWidth="25px"
android:minHeight="25px"
android:id="@+id/textView1"/>
</LinearLayout>
layoutDrop.xml : Spinner Dropdown view
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="getDropDownView()"
android:textSize="18sp"
android:textColor="#ff0000" />
</RelativeLayout >