ListView Refresh in Android

Question

I have a main activity with a ListView. I then have a second activity with a text box for the user input and a button. When the user enters the input and clicks on the button, it should add the item to the ListView in the main activity but for some reason the ListView doesn't refresh with the new data. Any idea on how to go about this ?

Answer 1

Create an adapter class for your listView.

class MyAdapter extends BaseAdapter {
ArrayList<Item> items;

// Override all other needed methods.

//Add method to add items to list from outside.

public void addItems(Item item) {
items.add(item);
adapter.notifyDataSetChanged();
}


 }

Inside your activity // Crate MyAdapter instance an assign to listview like-

listView,setAdapter(adapter);

Item item= new Item();

//Add necessary properties in item. and add item to list.

adapter.addItem(item);

This is the overall idea . Look around this. Should work.