如何在不擴展Activity的情況下在android中動態創建按鈕

Question

我在android中有一個可擴展Fragment的類。 而且我需要動態創建一個按鈕。 我不能使用新的Button（this）。 因為我沒有擴展活動。 我該怎么做呢？

public class Tab2Fragment extends Fragment {

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {


    LinearLayout theLayout =  (LinearLayout) inflater.inflate(R.layout.tab2, container, false);

    Context mFragmentContext=getActivity().getApplicationContext(); 
    Button btn=new Button(mFragmentContext);
    btn.setText("Hello Button");
    RelativeLayout.LayoutParams paramsd = new RelativeLayout.LayoutParams(150,30);
    paramsd.height = 600;
    paramsd.width = 60;
    btn.setLayoutParams(paramsd);
    addContentView(btn,paramsd); 

Answer 1

//嘗試使用以下代碼

溶膠1：

Button myButt=new Button(YourFragmentClass.this);

sol2：

Button myButt=new Button(getApplicationContext());

//您也可以獲得這樣的上下文

 private Context mFragmentContext=getActivity().getApplicationContext(); 

Answer 2

/* getActivity() will give you the Activity this fragment belongs
to, you can use this as 'Context' */

Button button = new Button(getActivity())

/* getView() will give you the root layout for this fragment 
(Relative, Linear or whatever you used in xml) and you must cast it
to a ViewGroup to access the getView() method*/

RelativeLayout.LayoutParams paramsd = new RelativeLayout.LayoutParams(150,30);
paramsd.height = 600;
paramsd.width = 60;

ViewGroup viewGroup = (ViewGroup) getView();
viewGroup.addView(button, paramsd);

有關getView（）的更多信息，請參見此處： Android向不帶ID的Fragment添加按鈕

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