Intercept Number 0 to 9 in Android EditText

Question

I want to intercept 0 to 9 button key events from soft keyboard in android. I have tried many ways but didn't succeed. any little help will help me a lot.

what I am doing is,

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {


    if (keyCode==KeyEvent.KEYCODE_12) 
    {
        Toast.makeText(context, "Pressed", Toast.LENGTH_LONG).show();

        return true;
    }

    return super.onKeyDown(keyCode, event);
}

in my custom EditText class but it is not working what am i missing? i have tried many key codes but no result in hand.

Answer 1

Use a text watcher, its much simpler:

At Class level:

EditText editText; 

in onCreate:

editText = (EditText)findViewById(R.id.yourEdittext)

editText.addTextChangedListener(mTextEditorWatcher);

Outside onCreate(Class level) :

final TextWatcher mTextEditorWatcher = new TextWatcher(){

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


            }

            public void onTextChanged(CharSequence s, int start, int before, int count) {
            System.out.println("Entered text: "+editText.getText());
                // USe edit_text.getText(); here 
            }

            public void afterTextChanged(Editable s) {

            }
        };

If you want to restrict the entry on your Edit Text to only alphabets add this in the XML of your edit text control:

 android:digits="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"

If you dont like the above and want to achieve this through code, use the following:

editText.setFilters(new InputFilter[] {
    new InputFilter() {
        public CharSequence filter(CharSequence chr, int start,
                int end, Spanned dst, int dstart, int dend) {
            if(chr.equals("")){ 
                return chr;
            }
            if(chr.toString().matches("[a-zA-Z ]+")){
                return chr;
            }
            return "";
        }
    }
});