Frage zu textviews und buttons

1private static class MyOnClickListener implements OnClickListener {
2
3 public static final int OPERATION_MINUS = 1;
4 public static final int OPERATION_PLUS = 2;
5 public static final int OPERATION_RESET = 3;
6
7 private int operation;
8 private TextView textViewSource;
9 private TextView textViewTarget;
10
11 public MyOnClickListener(int operation, TextView textViewSource, TextView textViewTarget) {
12 super();
13
14 this.operation = operation;
15 this.textViewSource = textViewSource;
16 this.textViewTarget = textViewTarget;
17 }
18
19 @Override
20 public void onClick(View view) {
21 switch (operation) {
22 case OPERATION_MINUS:
23 // subtract textViewSource value from textViewTarget
24 break;
25 case OPERATION_PLUS:
26 // add textViewSource value to textViewTarget
27 break;
28 case OPERATION_RESET:
29 // reset textViewTarget
30 break;
31 }
32 }
33 }
34
35 // ...
36 buttonIrgendwas.setOnClickListener(new MyOnClickListener(OPERATION_PLUS, textViewIrgendwas, textViewIrgendwasAnderes);
37 // ...