Question

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How to pass a value from one Activity to another in Android?

I have an activity with a list of titles and their bodies(content) (list6 example from ApiDemos). And I have an activity, where I add a note. When I click on “Add” button, I want the title of my note to appear on the list. Same with body. The problem is, that in List activity there are two String[] arrays with predefined hard-coded titles and bodies. What should I do to be able to add my own new titles with a content instead of having these hard-coded values?
I know I must use intents with startActivityForResult, but that’s probably all I know…

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..