Error to updating EditText

Question

On some devices, with this code, the EditText to_quantity is not updated in real time during the insertion of the value to be converted in the EditText from_quantity. What can be the problem?

EDIT TEXT from_quantity:

from_quantity.setOnKeyListener(new OnKeyListener(){ public boolean onKey(View v, int keyCode, KeyEvent event){ try{ if(!(Double.isNaN(Double.valueOf(from_quantity.getText().toString())))){ convert(from_quantity.getText().toString(), "to"); } }catch(NumberFormatException e){ Log.d("error", e.toString()); } return false; } }); from_quantity.setOnTouchListener(new OnTouchListener(){ public boolean onTouch(View v, MotionEvent event) { //Clear Quantities from_quantity.setText(""); to_quantity.setText(""); return false; } });

EDIT TEXT to_quantity:

to_quantity.setOnKeyListener(new OnKeyListener() { public boolean onKey(View v, int keyCode, KeyEvent event) { try{ if(!(Double.isNaN(Double.valueOf(to_quantity.getText().toString())))) { convert(to_quantity.getText().toString(), "from"); } } catch(NumberFormatException e) { Log.d("error", e.toString()); } return false; } }); to_quantity.setOnTouchListener(new OnTouchListener(){ public boolean onTouch(View v, MotionEvent event) { //Clear Quantities from_quantity.setText(""); to_quantity.setText(""); return false; } });

What do you want to achieve bro? you can use on focus change listener on edit text and do stuffs there realtime when edittext gain or lose focus. — Marko Niciforovic
– Marko Niciforovic, Commented May 10, 2013 at 10:11

Community · Accepted Answer · 2017-05-23 11:56:53Z

If you use the soft keyboard of your device, the OnKeyListener will not be called. You should use a TextWatcher.

onKeyListener not working with soft keyboard (Android)

Tomer B · Accepted Answer · 2013-05-11 08:58:41Z

Some software keyboards do not launch onKey() events. Create a TextWatcher and set it as a listener to the EditText instead:

to_quantity.addTextChangedListener(new TextWatcher() { @Override public void onTextChanged(CharSequence s, int start, int before, int count) { String text = s.toString() ; try{ if(!(Double.isNaN(Double.valueOf(text)))) { convert(text, "from"); } } catch(NumberFormatException e) { Log.d("error", e.toString()); } } @Override public void beforeTextChanged(CharSequence s, int start, int count, int after) { // TODO Auto-generated method stub } @Override public void afterTextChanged(Editable s) { // TODO Auto-generated method stub } });

but in this way the two EditText, from_quantity and to_quantity, are not coordinated ie the added is distorted
I don't understand what it means not coordinated... Use a TextWatcher in both EditText fields, it's the same as what you were trying to do except that I used a TextWatcher instead of OnKeyListener. If the code inside it doesn't do what it was supposed to do, that's a different matter.
practically, in from_quantity I enter the number to convertitre and at the same time it is converted to to_quantity. But using the TextWatcher, the cursor is not simultaneous with edidtext to_quantity

NoUserNoName · Accepted Answer · 2015-03-06 18:52:46Z

if you wanna use soft keyboard you need to setFocusable to target view:

setFocusableInTouchMode(true); //Enable soft keyboard on touch for target view setFocusable(true); //Enable hard keyboard to target view

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