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Home/ Questions/Q 6128367
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Editorial Team
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Editorial Team
Asked: May 23, 20262026-05-23T16:37:08+00:00 2026-05-23T16:37:08+00:00

I am following the book Professional Android development by Reto Meier, and there is

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I am following the book Professional Android development by Reto Meier, and there is an example of a ToDo list to be done in order to practice.
The problem is that I do everything as the book says, but I cannot add any task when pushing the central KeyPad, as I get an exception and the program has to close.
I tried to debug in Eclipse, and apparently it cannot find the .class file (?)

Here is the code where all the bad things are happening, specially in the todoItems.add line:

myEditText.setOnKeyListener(new OnKeyListener() {
    public boolean onKey(View v, int keyCode, KeyEvent event) {
        if (event.getAction() == KeyEvent.ACTION_DOWN)
            if (keyCode == KeyEvent.KEYCODE_DPAD_CENTER) {
                todoItems.add(0, myEditText.getText().toString());
                myEditText.setText("");
                aa.notifyDataSetChanged();
                return true;
            }
        return false;
    }
});
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  1. Editorial Team
    Editorial Team
    2026-05-23T16:37:08+00:00Added an answer on May 23, 2026 at 4:37 pm

    give this a shot – it uses View v that’s passed in.
    I assume that “todoItems” is properly instatiated

    myEditText.setOnKeyListener(new View.OnKeyListener()
    {
        public boolean onKey(View v, int keyCode, KeyEvent event)
        {
            EditText edittxt = (EditText)v;
    
            todoItems.add(0, edittxt.getText().toString());
    
            return false;
        }
    });
    
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