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How to get the selected item from ListView?

Asked 2011-01-29T02:28:48.877
32

in my Android app I have created a ListView component called myList, and filled it with objects of my own custom type:

class MyClass{

    private String displayName;
    private String theValue;
... //here constructor, getters, setters and toString() are implemented

}

I used the ArrayAdapter to bound the ArrayList theObjects with myList:

ArrayAdapter<MyClass> adapter= 
                new ArrayAdapter<MyClass>(this, R.layout.lay_item, theObjects);
myList.setAdapter(adapter);

This works fine, the list is populated and etc., but when I'm trying to access the selected item, i receive a Null object. I've done this using 

myList.setOnItemClickListener(new OnItemClickListener() {

   public void onItemClick(AdapterView<?> adapter, View v, int position, long id) {

MyClass selItem = (MyClass) myList.getSelectedItem(); //
String value= selItem.getTheValue(); //getter method

}

What seems to be the problem? Thank you

android listview
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2 Answers

47

By default, when you click on a ListView item it doesn't change its state to "selected". So, when the event fires and you do:

myList.getSelectedItem();

The method doesn't have anything to return. What you have to do is to use the position and obtain the underlying object by doing:

myList.getItemAtPosition(position);
answered 2012-11-29T14:29:24.553
-1

MyClass selItem = (MyClass) myList.getSelectedItem(); //

You never instantiated your class.

answered 2011-01-29T02:46:03.143

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