CODEWITHSUNDEEP
androidxamarin.android
Alex Gunning
Alex Gunning

Reputation: 23

Time Delay After User Input

I have a EditText box and the user types a string and the string is sent to a database and the UI is updated. I used the TextChanged function and the function works properly. However rather than updating the UI after each keystroke I want to wait 1/2 a second after the last keystroke to update the string to send to the database. Any suggestions on implementation?

editText.TextChanged += (object sender, Android.Text.TextChangedEventArgs e) =>
{
    string text = editText.Text.ToString();                  
};

Upvotes: 2

Views: 2590

Answers (3)

Tushar Saha
Tushar Saha

Reputation: 2106

We can actually use text-watcher override functions to solve this problem

Below is an example as to how it can be done

Also attached link with complete description

 private EditText searchText;  
 private TextView resultText;  
 private Timer timer;

      private TextWatcher searchTextWatcher = new TextWatcher() {  
        @Override
        public void afterTextChanged(Editable arg0) {
        // user typed: start the timer
        timer = new Timer();
        timer.schedule(new TimerTask() {
            @Override
            public void run() {
              // do required 
            }
        }, 400); // 400ms delay to before executing run, if user stops typing after 400ms function will get fired
    }

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

     }

    @Override
    public void onTextChanged(CharSequence s, int start, int before, int count) {
        // reset timer if user is typing
        if (timer != null) {
            timer.cancel();
        }
    }
};

source : delayed edit text

Upvotes: 0

Dulanga
Dulanga

Reputation: 1346

You can do following before updating the ui

new Handler().postDelayed(new Runnable(){

                @Override
                public void run() {
                    //Upadating your ui

                }

            }, 500);

Upvotes: 0

Cata
Cata

Reputation: 11211

This can do it:

new Handler().postDelayed(new Runnable(

    public void run(){

       // your update code here..

    }

), 2000);

2000 represents the number of milliseconds before the code will run.. so in this case is 2 seconds.

Though I think you might try to think to a better idea of saving the data, like using onFocusChangeListener on the EditText and save the data after the EditText looses focus..

EDIT:

Of course the above code should be put in the text changed callback method and you should also make sure the timer won't be called on each key pressed..

Upvotes: 3

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