changing activity + android studio code example

Example 1: how to move from one activity to another in android studio on button click

// also use set onclick listener
 public void next(View view) {
        Intent intent = new Intent(this,Activity2.class);
        startActivity(intent);
   }

Example 2: android how to switch between activities

Intent intent = new Intent(getApplicationContext(), ActivityToBeOpened.class);
startActivity(intent);