How to launch main activity of one application from another application on Android

Question

I have 2 applications A & B. A has one activity. B has two activities. In B, one is the main (launcher) activity and the other is the default activity. All this is defined in the manifest file. But how do I launch the main activity of B from A ?

Answer 1

Do this

     Intent launchIntent = getPackageManager().getLaunchIntentForPackage("com.package.address");
     startActivity(launchIntent);`