Chapter 4 ToDo List

floickelsheimer · April 29th, 2010, 10:08 AM

For my studies I have to develop an Android Application based on version 1.6 and I want to modify some existing views like shown in chapter 2. So, one question:

Where are the differences between version 1.6 and 2.1 concerning the modification of existing views? I have tested the book example "ToDo-List" with version 1.6 and nothing worked. Where exactly in the example are elements of version 2.1? Or which of them can be reused for version 1.6?

Thanks for response.

Reto · April 29th, 2010, 10:41 AM

Could you describe the problems you had with the TodoList example?

The changes from 1.6 to 2.1 shouldn't affect the code samples is Chapter 2, so maybe something else is causing your issues.

floickelsheimer · April 29th, 2010, 11:34 AM

Sorry, it was not Chapter 2 (like I wrote in the text). It was rather in Chapter 4 (like I wrote in the headline) where you have shown how to modify existing views. The same code works for me with Android 2.1, but not with 1.6.

I think it has something to do with the XML-Layout files. Because when I debugged the code there was nothing wrong in JAVA Code. The error arrives after calling the method "notifyDataSetChanged" (aa is the name of the ArrayAdapter):

Code:

 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)
   	      {    	 
            // Add a new todo item and clear the input box.
            todoItems.add(0, myEditText.getText().toString());
   	        myEditText.setText("");
   	        aa.notifyDataSetChanged();
	          return true;   	        
   	      }
   	    return false;
   	  }
    });

The debugger identifies an error of the PhoneLayoutInflater when the method "ArrayAdapter.createViewFromResource(...)" is called.

I hope I could describe my question/problem in a more understandable way. Thanks for help.