How can I convert a key code into a char or string?

Question

How to convert the keycode into char or string??

Here is the example code:

public boolean onKey(View v, int keyCode, KeyEvent event) {
    // TODO Auto-generated method stub
    //Log.d("EditText", "It's Working...!" + event.getAction());
    if (event.getAction() == 0) {
        switch (v.getId()) {
        case R.id.editText1:
            Log.d("EditText", "In editText1");
            if (text1.length() == 3)
            {
                text2.setText();
                text2.requestFocus();

            }
            break;

        case R.id.editText2:
            Log.d("EditText", "In editText2");
            if (text2.length() == 0)
                text1.requestFocus();
            break;
        }
    }

    return false;
}

Tod · Answer 1 · 2012-02-29T04:46:41.833

54

char unicodeChar = (char)event.getUnicodeChar();

edited Feb 29 '12 at 04:46

answered Feb 11 '12 at 00:35

Tod

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Why I got �� when I input keyevent 67 (KEYCODE_DEL) ? – Corey Apr 16 '18 at 05:36
if you get output like this ��. Filter it this way if (keyCode != 59) – Azizi Musa Jul 02 '19 at 08:41
Note that you don't need to have `KeyEvent` reference to do this. You can convert plain keycode int value by using `KeyCharacterMap`. This is atm basically what `getUnicodeChar()` does. – Peter Sep 27 '20 at 22:14
getUnicodeChar() now requieres a parameter, that code doesn't work like that – Windgate Oct 15 '21 at 10:26

score 6 · Answer 2 · answered Jul 04 '11 at 12:28

6

Use event.getNumber().

answered Jul 04 '11 at 12:28

Dave

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score 3 · Answer 3 · answered Nov 27 '13 at 22:55

3

If you don't have a KeyEvent object you can use this on the keycode :

public void onKey(int primaryCode, int[] keyCodes) {
     char c = Character.toChars(primaryCode)[0];
}

answered Nov 27 '13 at 22:55

Raffy

79
4

score 2 · Answer 4 · answered Jun 26 '18 at 14:10

2

Tod answer is almost complete, but when you want to settext of an edittext with this eventcode you should to add a little thing:

sample_et.setText((char)event.getUnicodeChar()+"");

answered Jun 26 '18 at 14:10

saleh sereshki

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score 0 · Answer 5 · answered Jul 01 '21 at 12:45

If you want to send a key from one control to another (for instance, from RecylerView to EditText inside it), you can use this:

editText.dispatchKeyEvent(KeyEvent(0, 0, KeyEvent.ACTION_DOWN, keyCode, 0))
editText.dispatchKeyEvent(KeyEvent(0, 0, KeyEvent.ACTION_UP, keyCode, 0))

score -3 · Answer 6 · edited Dec 06 '12 at 08:13

-3

Try this..

String s="";

@Override
public boolean onKey(View v, int keyCode, KeyEvent event) {
    EditText t=(EditText)v;
    s=t.getText();  
    return false;
}

edited Dec 06 '12 at 08:13

Hermann Hans

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answered Dec 06 '12 at 07:51

GaneshKumar

53
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score -3 · Answer 7 · answered Jun 24 '14 at 04:21

-3

Use

String.fromCharCode();

String.fromCharCode(65,66,67) returns ABC.

See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/fromCharCode .

answered Jun 24 '14 at 04:21

kipid

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How can I convert a key code into a char or string?

7 Answers7

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