がどのように活動

Question

からのフラグメントのテキストを設定することができ、私はNullPointerExceptionが、

主な活動

ProductDetail productDetail = (ProductDetail)findViewById(R.id.pd_details); 
    productDetail.setDescription("This is description"); 

FragmentDescription.java 

public View onCreateView(LayoutInflater inflater, ViewGroup container, 
         Bundle savedInstanceState) { 
    // Inflate the layout for this fragment 
    return inflater.inflate(R.layout.fragment_description, null); 


ProductDetail.java 

@Override 
public void setDescription(String description) { 
    tvDescription.setText(description); 
} 

Answer 1

が追加FragmentManager

ProductDetail productDetail = (ProductDetail)getSupportFragmentManager().findFragmentById(R.id.pd_details);  
    productDetail.setDescription("This is description");