AutoCompleteTextView doesn't suggest for just FIRST SEARCH

Question

Aim :

I want to get some strings from webservice and populate AutoCompleteTextView with them.This is simple but what I want actually is to begin search (invoke webservice) when typing finished.

I mean, for example, I type something and 3 seconds after typing finished, AutoCompleteTextView would get populated and suggestions show up.

What I did so far :

As you can see in the code below, I used a CountDownTimer to achieve this. I set it 3 seconds and start it in OnTextChanged. When user type, I clear CountDownTimer and create a new instance of it and start it again.

So, whenever user type -on every key press- I reset counter.

After that, I call my method - which invoke webservice and populate AutoCompleteTextView - in CountDownTimer's OnFinish().

Problem :

When I finish typing, everything works as expected as I can see in debug mode. But suggestions doesn't come up FOR ONLY FIRST SEARCH.

I mean, it works as well but AutoCompleteTextView doesn't get populated with data for only FIRST TIME.

Note :

I invoke webservice both synchronous and asynchronous way.

counter=new MyCount(3000, 1000);
autoComplete.addTextChangedListener(new TextWatcher(){

        public void afterTextChanged(Editable editable) {
            
            if(isBackPressed){  //catch from KeyListener, if backspace is pressed don't invoke web service
                
                isBackPressed=false;
                return;
            }
                
            String newText = editable.toString();
            
            searchText=newText;
        }

        public void beforeTextChanged(CharSequence s, int start, int count, int after) {


        }

        public void onTextChanged(CharSequence s, int start, int before, int count) {

            if(isBackPressed){
                
                isBackPressed=false;
                return;
            }
                
            counter.cancel();
            counter=new MyCount(3000, 1000); 
            counter.start();
        }

    });

Here is my CountDownTimer Class

    public class MyCount extends CountDownTimer{

    public MyCount(long millisInFuture, long countDownInterval) {

    super(millisInFuture, countDownInterval);

    }
    @Override
    public void onFinish() {
        
        invoke_webservice(searchText);
    }
    @Override
    public void onTick(long millisUntilFinished) {
        
    }
    }

Here is my method to invoke webservice in synchronous way

public void invoke_webservice(String key){
    
    try{
                    . //code to invoke webservice and populate string [] results
                    .
                    .
    aAdapter = new ArrayAdapter<String>(getApplicationContext(),R.layout.item,results);
    autoComplete.setAdapter(aAdapter);
    aAdapter.notifyDataSetChanged();
    
}

Here is my method to invoke webservice in asynchronous way

class getJson extends AsyncTask<String,String,String>{

    @Override
    protected String doInBackground(String... key) {
        
        String newText = key[0];

                    . //code to invoke webservice and populate string [] results
                    .
                    .

        
        runOnUiThread(new Runnable(){
            public void run(){
                
                aAdapter = new ArrayAdapter<String>(getApplicationContext(),R.layout.item,results);
                autoComplete.setAdapter(aAdapter);
                aAdapter.notifyDataSetChanged();
            }
        });
        
        return null;
    }

}

Thanks in advance

please don't add duplicate posts for same problem, merge your posts so people don't waste their time looking and answering both posts. This usually considered as spamming http://stackoverflow.com/questions/10143308/android-autocompletetextview-filter-is-firing-late-for-the-first-search-only — Mayank, Apr 14 '12 at 08:35
I think user have deleted his post that's why the link is not working anymore. He had same question in another post, so I just pointed out to him that it is not a good idea to do that and can be considered spamming. — Mayank, Sep 07 '12 at 06:25

vikas kumar · Answer 1 · 2017-02-08T07:14:11.843

Here is what you can do: i have set the threshold value to 3

 atvSearchPatient.setThreshold(3);

apply the text watcher listener on autocomplete text view like below:

 //here set the text watcher
    atvSearchPatient.addTextChangedListener(new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {

        }

        @Override
        public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {

        }

        @Override
        public void afterTextChanged(Editable editable) {
            String str = atvSearchPatient.getText().toString().trim();
            if (str.length() >2) {

                    searchPatient(str );

            } 
        }
    });

on your first call hit API with null values and for second and consecutive calls with string from autocomplete textview field as above.and then in response apply the adapter like below:

this.nameList.clear();
    if (nameList.size() > 0) {
        this.nameList.addAll(dataFromResponseList);
        atvSearchPatient.setAdapter(null);
        ArrayAdapter<String> adapter = new ArrayAdapter<>(
                this, android.support.v7.appcompat.R.layout.select_dialog_item_material, nameList);
        atvSearchPatient.setAdapter(adapter);
        adapter.notifyDataSetChanged();
        atvSearchPatient.showDropDown();

It's weired problem for first time not working but that's the only way working in my case nothing else. hope it helps Thanks

AutoCompleteTextView doesn't suggest for just FIRST SEARCH

1 Answers1