Problem with backspace key

Processing for Android
1

hello, i need your help!

I was experimenting with the code, but found a problem

for example if I type 5 letters, I need to press the backspace key six times to just delete a character

for example if I type 10 letters, I need to press the backspace key eleven times to just delete a character

and so on etc

String t = "abcde";

void setup() {
  textSize(60);
  textAlign (CENTER);
  fill (0);
}

void draw () {
  background (255);
  text (t, width/2, height/2);
}

void keyPressed() {
  if (keyCode == 67) { //backspace
    if (t.length() > 0) t = t.substring(0, max(0, t.length()-1));
  } else {
    if (key > 31 && key < 127 &&  t.length() < 10) {  
      t += key;
    }
  }
}

void mousePressed () {
  openKeyboard ();
}

in java mode the code works fine, but in android mode the problem appears

2

Your sketch works fine in Android. Just be aware it will not work in JAVA, where the key Code for Backspace is 8 instead of 67.

1 Like
3

hello, friend thanks for your help, I made the following change in my code, instead of writing
keyCode == 67
wrote:
keyCode == BACKSPACE
but the problem persists

String t = "abcde";

void setup() {
  textSize(60);
  textAlign (CENTER);
  fill (0);
}

void draw () {
  background (255);
  text (t, width/2, height/2);
}

void keyPressed() {
  if (keyCode == BACKSPACE) { //backspace
    if (t.length() > 0) t = t.substring(0, max(0, t.length()-1));
  } else {
    if (key > 31 && key < 127 &&  t.length() < 10) {  
      t += key;
    }
  }
}

void mousePressed () {
  openKeyboard ();
}
4

apparently this problem occurs in huawei devices but in sansung it works fine, Thanks to Noel, he gave me the solution, install Hacker’s keyboard from google play. but I would like to find a more elegant solution.

5

Have you checked to see the value of the keycode? It might be that it doesnt match the sketch variables.

2 Likes
6

yes maybe because there is a multi choices for keyboard

1 Like