Fragment 轉頁到其他 Activity

//fragment.java
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState){
    btnTest = (Button) getView().findViewById(R.id.btnTest); //取得button, btnTest 存在於fragment.xml 裡
    
    btnTest.setOnClickListener(new View.OnClickListener(){
        public void onClick(View v){
            Intent i = new Intent(getActivity(), testActivity.class);
            startActivity(i);
        }
    });
}