I'm very new on Android development.
I want to create and start an activity to show information about a game. I show that information I need a gameId.
How can I pass this game ID to the activity? The game ID is absolutely necessary so I don't want to create or start the activity if it doesn't have the ID.
It's like the activity has got only one constructor with one parameter.
How can I do that?
int which is your id into the new
Intent intent = new Intent(FirstActivity.this, SecondActivity.class); Bundle b = new Bundle(); b.putInt("key", 1); //Your id intent.putExtras(b); //Put your id to your next Intent startActivity(intent); finish();
Then grab the id in your new
Bundle b = getIntent().getExtras(); int value = -1; // or other values if(b != null) value = b.getInt("key");
Just add extra data to the Intent you use to call your activity.
In the caller activity :
Intent i = new Intent(this, TheNextActivity.class); i.putExtra("id", id); startActivity(i);
Inside the onCreate() of the activity you call :
Bundle b = getIntent().getExtras(); int id = b.getInt("id");
Edit : Oops, Charlie Sheen was quicker.