Dynamic start activity in Android?

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Why not have an initial Activity with no UI that checks the condition in its onCreate, then launches the next Activity, then calls finish() on itself? I’ve never called finish() from within onCreate() though, so I’m not sure if this will work.

EDIT
Seems to work fine. Here’s some code to make it clearer.
Initial Activity:

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    Intent intent;
    if (condition) {
       intent = new Intent(this, ClassA.class);
    } else {
       intent = new Intent(this, ClassB.class);
    }
    startActivity(intent);
    finish();
    // note we never called setContentView()
}

Other Activity:

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
}

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