我在片段中启动我的活动，但变量变为空？

Question

这是活动类的代码。

public class Form1Activity extends MainActivity { 
    private EditText factory_name,cell_no, _email: 
    private Spinner meter_type_spinner; 
    private Button form1submitbutton; 

    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 

     factory_name = (EditText) findViewById(R.id.factorynameTF); 
     cell_no = (EditText) findViewById(R.id.cellnoTF); 
     _email = (EditText) findViewById(R.id.emailTF); 

     meter_type_spinner = (Spinner) findViewById(R.id.metertypedropdown); 

     form1submitbutton = (Button) findViewById((R.id.form1submitbtn)); 

     List<String> metertype = new ArrayList<>(); 
     metertype.add("day"); 
     metertype.add("night"); 
     ArrayAdapter<String> adpterMeterType = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, metertype); 
     adpterMeterType.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); 
     meter_type_spinner.setAdapter(adpterMeterType); 
    } 

这里是我称之为活动的片段代码。知道请告诉我我做错了什么。我应该做的所有字段处理在片段或做一个单独的活动，每片段进行的意见运作如编辑TEX，纺织等

public View onCreateView(LayoutInflater inflater, ViewGroup container, 
         Bundle savedInstanceState) { 
    View rootView = inflater.inflate(R.layout.form1, container, false); 
    context = rootView.getContext(); 
    Intent intent = new Intent(context, Form1Activity.class); 
    startActivity(intent); 

    return rootView; 
} 

Answer 1

尝试：

Intent intent = new Intent(getActivity(), Form1Activity.class); 
getActivity().startActivity(intent); 

，而不是

`Intent intent = new Intent(context, Form1Activity.class)`; 
startActivity(intent);