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

The first param is the applicationId located in the build.gradle file

The second param is full path to of the class with its package. for example: intentObj.setClassName("applicatioId", "com.youCompany.yourAppName.YourClassName")