Cannot start new Intent by setClassName with different package in Android

Question

I want to start a new Intent dynamically. Therefore setClassName seems the best choice.

First, I define 3 activity in Manifest

Answer 1

You can use the following method to create the intent in the package context:

    Intent intent = new Intent(this, MyActivity.class);
    intent.setAction(Intent.ACTION_VIEW);
    intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    startActivity(intent);

This way you keep on generic code.

HTH