AutoCompleteTextView AddTextChangedListener method in Android(Xamarin)

Question

I want to Implement AddTextChangedListener to AutoCompleteTextView using Android.Text.ITextWatcher But I can't find any way on how to implement in Xamarin.

I am using BigData so every Single Character add in AutoCompleteTextView i want to call server to check the data. So I want to add onTextChanged, beforeTextChanged and afterTextChanged for my AutoCompleteTextView.

In pure Android I am using below way

txtSearch.addTextChangedListener(new TextWatcher() {
                                @Override
                                public void beforeTextChanged(CharSequence s, int start, int count, int after) {

                                }

                                @Override
                                public void onTextChanged(CharSequence s, int start, int before, int count) {
                                    String newText = txtSearch.getText().toString();
                                    new getJsonData().execute(newText);
                                }

                                @Override
                                public void afterTextChanged(Editable s) {

                                }
                            });

Any Help be Highly Appreciated.

Update :

See the Upper ScreenShot If user write something on Medical Store AutoCompleteTextView and select the value from Suggestion which is change every time when user write single new character. Then I want to set it Address if user select some value from data.

you dont need it: all you need is a `android.widget.Filterable` adapter instead — pskink, Nov 18 '16 at 10:41
@pskink can you show How can I Implement It with every Single new charcter add by User I want to call the server data. Because `onTextChanged` require to call server new data. — Harshad Pansuriya, Nov 18 '16 at 10:43
@pskink but I want to set Other value base on Filter data in `onTextChanged` method. — Harshad Pansuriya, Nov 18 '16 at 10:50
like if User select `Name` then i want to directly set it `Address` to below `TextView`. — Harshad Pansuriya, Nov 18 '16 at 10:52
Let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/128449/discussion-between-ironman-and-pskink). — Harshad Pansuriya, Nov 18 '16 at 11:21
@pskink first of all I want implement `onTextChanged` because on text change i want to pass that `string` to server which has query filter and give Filter data automatically so on new text write in `AutoComplete` I want to call server data that's why I Require `onTextChanged` this method. I Think now you have clear Idea What I want. — Harshad Pansuriya, Nov 18 '16 at 11:24
@pskink that is not work in my case because I describe full problem in the above comment. — Harshad Pansuriya, Nov 18 '16 at 11:26
@pskink your code is in `Java` can you post It How can i Implement because it totally confuse me. — Harshad Pansuriya, Nov 18 '16 at 11:30

score 0 · Accepted Answer · answered Nov 18 '16 at 12:59

I got the Solution.

In my Activity I have Extends with Android.Text.ITextWatcher and Implement Interface Method it will Create like below way

public void AfterTextChanged(IEditable s)
        {

        }

public void BeforeTextChanged(ICharSequence s, int start, int count, int after)
        {

        }

public async void OnTextChanged(ICharSequence s, int start, int before, int count)
        {
            string newText = autoCompleteTextView.Text;
            var suggestionData = await PrescriptionServices.GetFilterData(newText);

            adapter = new ArrayAdapter(this, Resource.Layout.row_org, suggestionData);
            autoCompleteTextView.Adapter = adapter;

        }

seems you didnt get what i meant, take a look [here](http://androidxref.com/7.0.0_r1/xref/frameworks/base/core/java/android/widget/AutoCompleteTextView.java#856), as you can see `ACTV` already has `TextWatcher` (called `MyWatcher`), just analize this source code and you will know how to use `ACTV` correctly — pskink, Nov 18 '16 at 13:35

AutoCompleteTextView AddTextChangedListener method in Android(Xamarin)

1 Answers1