Question

I have a question:

I have a list (for example with Names from my friends) in activity “a”. When i click on one of the names(example: peter) i want to start a new activity “b”. At this activity i want to show number, birthday … from this person (peter).

Intent intent = new Intent(this, activityb.class);
            startActivity(intent);

Can I insert here a parameter?

How knows activity “b” that activity a clicked the name peter…. ? I dont have any idea…. Normally i will save it with a special parameter for my function… But this is activity…..

Answer 1

You can add extra values to the intent in activity A by using putExtra() and use getStringExtra() (or getLongExtra(), getIntExtra(), etc.) to retreive them in activity B

Take a look at this page:
http://developer.android.com/reference/android/content/Intent.html

// Activity A
intent.putExtra("SOMENAME", "SomeString"); // Doesn't have to be a String ofcourse

// Activity B
String s = (String) getIntent().getStringExtra("SOMENAME");