Android CustomListAdapter notifydatachange()가 작동하지 않습니다.

Question

맞춤 ArrayAdapter을 사용하여 항목 목록을 표시하고 싶습니다.

버튼을 클릭하여 데이터를 삽입합니다. 다음과 같이

MainFragment.java

@Override 
     public void onClick(View v) { 
      DatabaseClass feed = new DatabaseClass(getActivity()); 
      new DatabaseClass(getActivity()).getList(); 
      new MyFragment().updateList(); 
     } 

내 레이아웃 파일입니다.

main.xml에

<LinearLayout 
       android:layout_width="match_parent" 
       android:layout_height="match_parent" 
       android:orientation="vertical" > 

       <fragment 
        android:id="@+id/update" 
        android:name="com.android.MyFragment" 
        android:layout_width="match_parent" 
        android:layout_height="match_parent" /> 
      </LinearLayout> 

MyFragment.java

import java.util.List; 

import android.content.Context; 
import android.os.Bundle; 
import android.support.v4.app.ListFragment; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.ArrayAdapter; 
import android.widget.TextView; 

public class MyFragment extends ListFragment { 

    // creating database reference 
    private static DatabaseClass feed; 
    private List<CustomModel> customList; 
    private static CustomListAdapter adapter; 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     feed = new DatabaseClass(getActivity()); 
    } 

    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
      Bundle savedInstanceState) { 

     // To get List of CustomModel objects 
     feed.getList(); 

     // CUSTOM_LIST is list constant 
     adapter = new CustomListAdapter(getActivity(), 
       R.layout.update, Utils.CUSTOM_LIST); 

     // setting adapter  
     setListAdapter(adapter); 
     View view = inflater.inflate(R.layout.update, container, false); 

     return view; 
    } 

    @Override 
    public void onStart() { 
     super.onStart(); 
    } 

    // this method is called after inserting data into database 
    public void updateList() { 
     if (adapter != null) { 
      adapter.notifyDataSetChanged(); 
     } else { 
      adapter = new CustomListAdapter(getActivity(), 
        R.layout.update, Utils.CUSTOM_LIST); 
      adapter.notifyDataSetChanged(); 
     } 
    } 

    private class CustomListAdapter extends ArrayAdapter<CustomModel> { 

     private final Context context; 
     private final List<CustomModel> list; 
     private TextView name, message; 

     public CustomListAdapter(Context context, int resource, 
       List<CustomModel> list) { 
      super(context, resource, list); 
      this.context = context; 
      this.list = list; 
     } 

     @Override 
     public View getView(int position, View convertView, ViewGroup parent) { 
      LayoutInflater inflater = (LayoutInflater) context 
        .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
      View view = inflater.inflate(R.layout.single_row, parent, 
        false); 

      name = (TextView) view.findViewById(R.id.name); 
      message = (TextView) view.findViewById(R.id.message); 
      CustomModel obj = list.get(position); 

      name.setText(obj.getName()); 
      message.setText(obj.getMessage()); 

      return view; 
     } 
    } 
} 

그리고 MyFragment.java에 대한 레이아웃 파일입니다

update.xml을

<ListView xmlns:android="http://schemas.android.com/apk/res/android" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
android:id="@android:id/list" 
/> 

내 데이터베이스 클래스는

DatabaseClass.java 버튼의

public void getList(){ 
     ourDatabase = this.getReadableDatabase(); 
     String sql = "SELECT * FROM " + DATABASE_TABLE; 
     Cursor c = ourDatabase.rawQuery(sql, null); 

     int iName = c.getColumnIndex(KEY_NAME); 
     int iMessage = c.getColumnIndex(KEY_MESSAGE); 

     for (c.moveToFirst(); !c.isAfterLast(); c.moveToNext()) { 
      CustomModel model = new CustomModel(); 


      model.setName(c.getString(iFromName)); 
      model.setMessage(c.getString(iMessage)); 

      Utils.LIST.add(model); 
     } 
} 

온 클릭하고, 데이터는 DB에 삽입됩니다. UI에는 반영되지 않습니다. 내 목록보기가 업데이트되지 않는 이유는 무엇입니까?

private class CustomListAdapter extends ArrayAdapter<CustomModel> { 

    private final Context context; 
    private final List<CustomModel> list; 
    private TextView name, message; 

    public CustomListAdapter(Context context, int resource, 
      List<CustomModel> list) { 
     super(context, resource, list); 
     this.context = context; 
     this.list = list; 
    } 

    @Override 
    public View getView(int position, View convertView, ViewGroup parent) { 
     LayoutInflater inflater = (LayoutInflater) context 
       .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
     View view = inflater.inflate(R.layout.single_row, parent, false); 

     name = (TextView) view.findViewById(R.id.name); 
     message = (TextView) view.findViewById(R.id.message); 
     CustomModel obj = list.get(position); 

     name.setText(obj.getName()); 
     message.setText(obj.getMessage()); 

     return view; 
    } 

    public void updateList(List<CustomModel> list) { 

     this.list = list; 
     notifyDataSetChanged(); 

    } 
} 

그래서 대신 notifyDataSetChanged(); 전화를 호출하는 활동에서 notifyDataSetChanged();

그래서 방법을 어댑터 자체에 메소드 updateList을 추가하고 전화를 다음과 같이

감사

Answer 1

는 어댑터를 변경

updateList(List<CustomModel> newList)

나는 이것이 효과가있을 것이라고 확신한다.