Passing data from one activity to another in Android [duplicate]

Answer 1

You have two option:

1) make the listview and the two arraylists static

This way you can use the same instances of it from the activity with add button and modify the listview as:

FirstActivity.listTitlesArrayList.add(listTitleString);
FirstActivity.listDescriptionArraylist.add(listDescriptionString);//this is probably your note
FirstActivity.listView.invalidateViews();

2)if you want to use intents:

while going to the ListActivity pass data by..

intent.putExtra("Title", listTitleString);
intent.putExtra("Content", listDescriptionString);
startActivity(intent);

and to recover it in second activity use:

title= getIntent().getExtras().getString("Title");

...and so on..

Answer 2

There are several ways to share data between activities.

In your case probably the easiest way is to have a reference to list in Application. This answer summs it up nicelly: Making data obtained in one activity available to all the activities