我如何设置json响应字符串android按钮文本

Question

嗨，我是新来的android我尝试设置一个web服务的响应字符串的按钮的文本，按钮是在一个listview ..我已经尝试了下面的代码，但它不会工作..如何更改按钮的文本。

这里是我的代码

public class MainActivity extends ListActivity implements RegisterContactToServer.AsyncResponseListener { 
    ListView lv; 
    Cursor cursor; 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.list_contact); 

     cursor=getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, null, null, null); 
     startManagingCursor(cursor); 
     String[] from={ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME,ContactsContract.CommonDataKinds.Phone.NUMBER,ContactsContract.CommonDataKinds.Phone._ID}; 
     int[] to={R.id.name_entry,R.id.number_entry}; 

     ContactList listadapter=new ContactList(this,R.layout.single_row1,cursor,from,to); 

     setListAdapter(listadapter); 
     lv=getListView(); 
     lv.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE); 

    } 

    class ContactList extends SimpleCursorAdapter implements Filterable { 
     private Context context; 
     String strfromMobileno=""; 
     private int layout; 
     public ContactList(Context context, int layout, Cursor c, 
       String[] from, int[] to) { 
      super(context, layout, c, from, to); 
      this.context=context; 
      this.layout=layout; 

      // TODO Auto-generated constructor stub 

     } 

      @Override 
     public void bindView(View v, final Context context, Cursor c) { 

      int nameCol = c.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME); 
      String name = c.getString(nameCol); 

      int noCol = c.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER); 
      String no = c.getString(noCol); 
     final CheckBox p1 = (CheckBox) v.findViewById(R.id.checkBox1); 
      final CheckBox p2 = (CheckBox) v.findViewById(R.id.checkBox2); 
      final CheckBox p3 = (CheckBox) v.findViewById(R.id.checkBox3); 



      final TextView name_text = (TextView) v.findViewById(R.id.name_entry); 
      if (name_text != null) { 
       name_text.setText(name); 
      } 

      final TextView no_text = (TextView) v.findViewById(R.id.number_entry); 
      if (no_text != null) { 
       no_text.setText(no); 
      } 
      final Button btn=(Button)v.findViewById(R.id.button1); 
      btn.setOnClickListener(new OnClickListener() { 
       public void onClick(View v) { 
        // TODO Auto-generated method stub 




        String contactName = name_text.getText().toString(); 
        String contactNo =no_text.getText().toString(); 

        /*Intent intent = getIntent(); 
        String fromMobileno = intent.getExtras().getString("MN");*/ 



        Contact contact=new Contact(); 
        contact.setFromMobileno(contactName); 
        contact.setToMobileno(contactNo); 


        if(p1.isChecked()){ 
         int priority1=Integer.parseInt(p1.getText().toString()); 
         contact.setPriority1(1); 
         }else{contact.setPriority1(0);} 

         if(p2.isChecked()) 
         { 
         int priority2=Integer.parseInt(p2.getText().toString()); 
         contact.setPriority2(1); 
         }else{contact.setPriority2(0);} 

         if(p3.isChecked()){ 
         int priority3=Integer.parseInt(p3.getText().toString()); 
         contact.setPriority3(1); 
         }else{contact.setPriority3(0);} 
         contact.setStatus(statusR); 

        if (!contactName.equals("")){ 

        RegisterContactToServer reg=new RegisterContactToServer(context); 
         reg.execute(contact); 

         } 




       } 
      }); 
     } 


    } 
    @Override 
    public void onresponse(String status, String jsonData) { 
     // TODO Auto-generated method stub 
     LayoutInflater inflator = (LayoutInflater)this.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
     View v = inflator.inflate(R.layout.single_row1, null, false); 

     final Button btn=(Button)v.findViewById(R.id.button1); 
     btn.setText(jsonData); 

     Toast.makeText(getBaseContext(), jsonData, Toast.LENGTH_LONG).show(); 

    }} 

Answer 1

你会需要修改你正在使用填充您的ListView适配器的内容，你想在列表元素中的数据。然后，您将指示系统刷新ListView（notifyDataSetChanged（））并用新刷新的数据重新绘制ListView。