gistfile1.java

public class ActivityTest extends Frament implements Wizzard {
	
	@Override
	public Validate getValidate() {
		UserPasswordValidator userPasswordValidator = new UserPasswordValidator(user,password);
		return userPasswordValidator();
	}

}

public class TestActivity extends Activity {
	
	/** next step on wizzard */
	private void next(){
		if(currentStep >= pageAdapter.size()){
			//validate all
			
			for(Validate validate allValidates){
				boolean isValid = validate.isValid();
				... 
			}
			...
		}else{
			...
			Validate validate = pageAdapter.get(currentStep).getValidate();
			allValidates.add(validate);
			...
		}
	}

}