如何在android中将json响应字符串设置为按钮文本

嗨，我是android新手，我尝试将web服务的响应字符串设置为按钮的文本，按钮位于listview中。我尝试了以下代码，但无效。如何更改按钮的文本

这是我的密码

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();

    }}

---

您需要修改用于填充ListView的适配器的内容，并在列表元素中添加所需的数据。然后，您将指示系统刷新ListView（notifyDataSetChanged（）），并使用新刷新的数据重新绘制ListView。

TL；博士，你应该试着把你的问题说得尽可能清楚和简短。尽量避免长时间的代码“复制粘贴”。祝你好运