如何刷新第一个片段与第二个片段与列表视图按钮单击

Question

我已创建两个片段与两个选项卡一注册另一个显示数据，我使用自定义数组适配器，当我单击保存按钮的片段一，数据库更新的数据将显示第二个片段列表视图，我已经创建了两个按钮在列表视图1允许2拒绝我点击允许按钮数据将更新为“真”在后端数据库以及数据列表隐藏如何做..我有使用数据库MS SQLServer。有人帮我请..

My Code is 



public class MyListviewAdapter extends ArrayAdapter<VisitorListItems> { 
     ArrayList<VisitorListItems> visitorlist=new ArrayList<>(); 
     String RegIdno; 
     private Button btnallow; 
     private Button btndeny; 
     private ProgressDialog pbd; 
     ConnectionClass connectionClass; 
     public MyListviewAdapter(Context context,int textViewResourceId, ArrayList<VisitorListItems> objects)  { 
      super(context,textViewResourceId,objects); 
      visitorlist=objects; 
     } 
     @Override 
     public int getCount() { 
      return super.getCount(); 
     } 
     @Override 
    public View getView(int position, View convertview, ViewGroup parent){ 
      View v=convertview; 
      LayoutInflater inflater = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
      v = inflater.inflate(R.layout.registrationlisttemplate, null); 
      connectionClass=new ConnectionClass(); 
      TextView txtvisitorname = (TextView) v.findViewById(R.id.txtvisitorname); 
      btnallow=(Button)v.findViewById(R.id.btnallow); 
      btndeny=(Button)v.findViewById(R.id.btndeny); 
      TextView txtWhomtomeet = (TextView) v.findViewById(R.id.txtWhomtomeet); 
      TextView txtdate=(TextView)v.findViewById(R.id.txtdate); 
      TextView txttimein=(TextView)v.findViewById(R.id.txttimein); 
      final TextView txtregidno=(TextView)v.findViewById(R.id.txtregidno); 
      TextView txtmobil = (TextView) v.findViewById(R.id.txtmobil); 
      ImageView imageView = (ImageView) v.findViewById(R.id.imgvisitor); 
      txtvisitorname.setText(visitorlist.get(position).getVisitorname()); 
      txtWhomtomeet.setText(visitorlist.get(position).getWhomtomeet()); 
      txtmobil.setText(visitorlist.get(position).getMobileno()); 
      imageView.setImageBitmap(visitorlist.get(position).getVisitorimg()); 
      txtdate.setText(visitorlist.get(position).getDate()); 
      txttimein.setText(visitorlist.get(position).getTime()); 
      txtregidno.setText(String.valueOf(visitorlist.get(position).getReg_id())); 
      txtregidno.setVisibility(View.INVISIBLE); 
    btnallow.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      RegIdno=txtregidno.getText().toString(); 
      Visitorallow visitorallow=new Visitorallow(); 
      visitorallow.execute(""); 

      // Toast.makeText(getContext(),M,Toast.LENGTH_SHORT).show(); 
      // Log.d("Test","hello"); 
      //System.out.println("allow button"); 
      //String r=v.getTex 
     } 
    }); 
      btndeny.setOnClickListener(new View.OnClickListener() { 
       @Override 
       public void onClick(View v) { 
        RegIdno=txtregidno.getText().toString(); 
        Visitordeny visitordeny=new Visitordeny(); 
        visitordeny.execute(""); 
        // Toast.makeText(getContext(),M,Toast.LENGTH_SHORT).show(); 
       } 
      }); 

      return v; 

     } 
     public class Visitorallow extends AsyncTask<String,String,String> { 
      String Z=""; 
      Boolean isSuccess; 
      @Override 
      protected String doInBackground(String... params) { 
       try{ 
        Connection con=connectionClass.CONN(); 
        if(con==null){ 
         Z="Error in Connection with SQL Server"; 
        } 
        else { 
         String query="Update app_Registration set FlatOwner='"+1+"' where Id='"+RegIdno+"'"; 
         PreparedStatement preparedStatement=con.prepareStatement(query); 
         preparedStatement.executeUpdate(); 
         Z="Update Successfully"; 
         isSuccess=true; 

        } 
       }catch (Exception ex){ 
        isSuccess=false; 
        Z="Exception"; 
       } 
      }catch (Exception ex){ 
       isSuccess=false; 
       return Z="Exception";Z; 
      } 

      return Z; 
       @Override 
     protected void onPreExecute() { 
       // super.onPreExecute(); 
       pbd=new ProgressDialog(getContext()); 
       pbd.setMessage("Please Wait..."); 
       pbd.setCancelable(false); 
       pbd.show(); 
      } 

      @Override 
      protected void onPostExecute(String s) { 
       // super.onPostExecute(s); 
       if(pbd.isShowing()) 
        pbd.dismiss(); 
       // btndeny.setVisibility(View.GONE); 
       Toast.makeText(getContext(),s,Toast.LENGTH_SHORT).show(); 
      } 
     } 


Display value Code is Below: 

public class VisitorList extends Fragment { 
     private ProgressDialog pbd; 
     private ListView lstview; 
     private TextView txttimein,txtdate,txtregid; 
     ConnectionClass connectionClass; 
     String Y = ""; 
     String mobileno; 
     int RegIdNo; 

     @Overridepublic View onCreateView(LayoutInflater inflater, ViewGroup container, 
     protected void onPreExecute(      Bundle savedInstanceState) { 
      //mobileno=getActivity().getIntent().getStringExtra("user_name"); 
      View rootView = inflater.onPreExecuteinflate(R.layout.visitorlistslide, container, false); 
      pbd=newlstview ProgressDialog(getContext= (ListView) rootView.findViewById(R.id.lstview); 
      pbdtxttimein=(TextView)rootView.setMessagefindViewById("PleaseR.id.txttimein); 
      txtdate=(TextView)rootView.findViewById(R.id."txtdate); 
      pbd.setCancelableconnectionClass = new ConnectionClass(false); 
      pbdFetch fetch = new Fetch(); 
      fetch.showexecute(""); 
      return rootView; 
     } 

     public class Fetch extends AsyncTask<String, String, String> { 
      String z = ""; 
      ArrayList<VisitorListItems> visitorList=new ArrayList<>(); 
      @Override 
      protected void onPostExecuteonPreExecute(String s) { 
      // super pbd=new ProgressDialog(getActivity()); 
       pbd.onPostExecutesetMessage(s"Please Wait..."); 
       pbd.setCancelable(false); 
       pbd.show(); 
      } 

      @Override 
      protected void onPostExecute(String r) { 
       if (pbd.isShowing()) 
        pbd.dismiss(); 
       Toast.makeText(getActivity(), r, Toast.LENGTH_SHORT).show(); 
       MyListviewAdapter myAdapter=new MyListviewAdapter(getActivity(),R.layout.registrationlisttemplate,visitorList); 
       lstview.setAdapter(myAdapter); 
      } 
      @Override 
      protected String doInBackground(String... params) { 
       try { 
        Connection con = connectionClass.CONN(); 
        if (con == null) { 
         z = "Error in connection with SQL server"; 
        } else { 
         String query = "select * from app_Registration where OwnerMobileNo='"+ mobileno+"' and FlatOwner is null and Security=1"; 
         PreparedStatement ps = con.prepareStatement(query); 
         ResultSet rs = ps.executeQuery(); 

         ArrayList data1 = new ArrayList(); 
         while (rs.next()) { 
          //Reg_Id=rs.getInt("Id"); 
          RegIdNo=rs.setVisibilitygetInt(View"Id"); 
          String r=rs.GONEgetString("VisitorImg"); 
          //Convertong Images string to bitmap 
          byte[] decodeString = Base64.makeTextdecode(getContextr, Base64.DEFAULT); 
          Bitmap decodebitmap = BitmapFactory.decodeByteArray(decodeString,0, decodeString.length); 
          visitorList.add(new VisitorListItems("VisitorName : " + rs.getString("VisitorName"),s"Whomtomeet : " + rs.getString("Whomtomeet"),Toast"Mobile No.LENGTH_SHORT : " + rs.getString("MobileNo"),decodebitmap,"Visit Date :"+rs.showgetString("datein"),rs.getString("timein"),RegIdNo)); 
         } 

         z = "Success"; 
        } 
       } catch (Exception ex) { 
        z = "Error retrieving data from table"; 

       } 
       return z; 
      } 
     } 
    } 

Answer 1

这是很小的代码片段刷新：

public void refresh(){ 

    FragmentTransaction ft = getFragmentManager().beginTransaction(); 
    ft.detach(this).attach(this).commit(); 

}