LinearLayoutで子ビューを動的に追加できません

Question

APIからフェッチされたデータで線形レイアウトを作成しています。コードが実行されるたびに、モデルクラスにデータを保存しているポイントに移動しますが、その後は線形レイアウトにビューを追加しません。

tabLayoutにある別のタブに同じコードを使用していますが、動作していますが、これは機能しません。私はここで私のデバッガのスクリーンショットを添付しています。下は私のコードの断片です。

Sent.java

package fragments; 

import android.content.Context; 
import android.os.Bundle; 
import android.support.annotation.Nullable; 
import android.support.design.widget.Snackbar; 
import android.support.v4.app.Fragment; 
import android.support.v4.widget.SwipeRefreshLayout; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.LinearLayout; 
import android.widget.TextView; 

import com.android.volley.AuthFailureError; 
import com.android.volley.Request; 
import com.android.volley.RequestQueue; 
import com.android.volley.Response; 
import com.android.volley.VolleyError; 
import com.android.volley.toolbox.StringRequest; 
import com.android.volley.toolbox.Volley; 
import com.mranuran.pehchankaun.R; 

import org.json.JSONArray; 
import org.json.JSONException; 
import org.json.JSONObject; 

import java.util.HashMap; 
import java.util.Map; 

import fr.castorflex.android.smoothprogressbar.SmoothProgressBar; 
import models.SentMessage; 
import utils.SharedPrefManager; 

public class Sent extends android.app.Fragment implements SwipeRefreshLayout.OnRefreshListener { 
    LinearLayout msgHolder,sentLinearLayout; 
    LayoutInflater inflater; 
    SmoothProgressBar progressBar; 
    SwipeRefreshLayout swipeRefreshLayout; 
    @Nullable 
    @Override 
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { 
     View view=inflater.inflate(R.layout.sent,container,false); 
     sentLinearLayout=(LinearLayout)view.findViewById(R.id.sentLinearLayout); 
     msgHolder=(LinearLayout)view.findViewById(R.id.sentMsgHolder); 
     progressBar=(SmoothProgressBar)view.findViewById(R.id.progressBar); 
     swipeRefreshLayout=(SwipeRefreshLayout)view.findViewById(R.id.swipe_refresh_layout); 
     return view; 
    } 

    @Override 
    public void onViewCreated(View view, @Nullable Bundle savedInstanceState) { 
     super.onViewCreated(view, savedInstanceState); 
     swipeRefreshLayout.setOnRefreshListener(this); 
     swipeRefreshLayout.post(new Runnable() { 
      @Override 
      public void run() { 
       swipeRefreshLayout.setRefreshing(true); 
       populateSent(); 
      } 
     }); 
    } 

    private void populateSent() { 
     msgHolder.removeAllViews(); 
     progressBar.setVisibility(View.VISIBLE); 
     progressBar.progressiveStart(); 
     inflater=(LayoutInflater)getActivity().getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
     RequestQueue rq= Volley.newRequestQueue(getActivity()); 
     StringRequest sr=new StringRequest(Request.Method.POST, "http://mranuran.com/pehchan_kaun/getSent.php", new Response.Listener<String>() { 
      @Override 
      public void onResponse(String response) { 
       try { 
        JSONObject json=new JSONObject(response); 
        JSONArray userArray=json.optJSONArray("messages"); 
        if(userArray.length()>0){ 
         SentMessage msg; 
         View v; 
         for(int i=0;i<userArray.length();i++){ 
          JSONObject singleMsgObj=userArray.getJSONObject(i); 
          msg=new SentMessage(singleMsgObj.getString("id"),singleMsgObj.getString("message"),singleMsgObj.getString("creation_date"),singleMsgObj.getString("receiver_name")); 
          v=inflater.inflate(R.layout.sent_msg_single_row,null,false); 
          TextView creationDate=(TextView) v.findViewById(R.id.creationDate); 
          TextView messageTV=(TextView)v.findViewById(R.id.msg); 
          TextView receivername=(TextView)v.findViewById(R.id.receiverName); 
          creationDate.setText(msg.getCreation_date()); 
          messageTV.setText(msg.getMessage()); 
          receivername.setText(msg.getReceiver_name()); 
          msgHolder.addView(v); 


         } 
        }else{ 
         Snackbar.make(sentLinearLayout,"You have not sent any messages to anyone.",Snackbar.LENGTH_SHORT).show(); 
         progressBar.progressiveStop(); 
         swipeRefreshLayout.setRefreshing(false); 
         return; 
        } 

        progressBar.progressiveStop(); 
        swipeRefreshLayout.setRefreshing(false); 

       } catch (JSONException e) { 
        e.printStackTrace(); 
        progressBar.progressiveStop(); 
        swipeRefreshLayout.setRefreshing(false); 
       } 
      } 

     }, new Response.ErrorListener() { 
      @Override 
      public void onErrorResponse(VolleyError error) { 
       Snackbar.make(sentLinearLayout,"Something went wrong.Try again",Snackbar.LENGTH_SHORT).show(); 
       progressBar.progressiveStop(); 
       swipeRefreshLayout.setRefreshing(false); 
       return; 
      } 
     }){ 
      @Override 
      protected Map<String, String> getParams() throws AuthFailureError { 
       Map<String,String> map=new HashMap<>(); 
       map.put("user_id",new SharedPrefManager(getActivity()).getUserID()); 
       return map; 
      } 
     }; 
     rq.add(sr); 
    } 

    @Override 
    public void onRefresh() { 
     populateSent(); 
    } 
} 

Answer 1

あなたはこの `V = inflater.inflateのレイアウトのparamsを設定しなかったのはなぜ

msgHolder.addView(v); 
msgHolder.requestLayout();