別のフラグメントボタンをクリックしたときのRecyclerViewの更新方法

Question

私は2つのタブを持っています。

A - RecycleFragment /////// B - DiaryFragment

私はDiaryFragmentでたときにボタンのクリックRecycleFragmentを更新します。

public class RecycleFragment extends Fragment { 

    static DBHelper dbHelper; 
    public List<Contact> items = new ArrayList<Contact>(); 

    MyAdapter adapter = new MyAdapter(items); 

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

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

     View rootView = inflater.inflate(R.layout.recyle_fragment, container, false); 
     RecyclerView rv = (RecyclerView) rootView.findViewById(R.id.rv_recycler_view); 
     LinearLayoutManager llm = new LinearLayoutManager(getActivity()); 
     // MyAdapter adapter = new MyAdapter(items); 


     rv.setLayoutManager(llm); 
     rv.setAdapter(adapter); 
     adapter.addTestData(); 
     adapter.notifyDataSetChanged(); 

     return rv; 
    } 
} 

====================

public class MyAdapter extends RecyclerView.Adapter<DataManager> { 
static List<Contact> items = new ArrayList<Contact>(); 

public MyAdapter(List<Contact> items){ 
    this.items = items; 
} 


@Override 
public DataManager onCreateViewHolder(ViewGroup viewGroup, int i) { 
    View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.entries, viewGroup, false); 
    return new DataManager(v); 
} 

@Override 
public void onBindViewHolder(DataManager holder, int position) { 

    Contact item = items.get(position); 
    holder.mTitle.setText(item.get1(Contact.Field.TITLE)); 
    holder.mDate.setText(item.get1(Contact.Field.DATE)); 
    holder.mMonth.setText(item.get1(Contact.Field.MONTH)); 
    holder.mTime.setText(item.get1(Contact.Field.TIME)); 
    holder.mDay.setText(item.get1(Contact.Field.DAY)); 
    holder.mContent.setText(item.get1(Contact.Field.CONTENT)); 
    holder.mMood.setImageResource(item.get2(Contact.Field.MOOD)); 
    holder.mWeather.setImageResource(item.get2(Contact.Field.WEATHER)); 

} 

@Override 
public int getItemCount() { 
    return items.size(); 
} 

public void setItem(List<Contact> items){ 
    this.items = items; 
    notifyItemChanged (0, null); 
} 


public void addTestData(){ 

    Cursor cursor = RecycleFragment.dbHelper.D_getAllData(); 
    if(cursor != null) { 
     if (cursor.moveToFirst()) { 
      do{ 
       add(new Contact(cursor.getString(0), 
         cursor.getString(1), 
         cursor.getString(2), 
         cursor.getString(3), 
         cursor.getString(5), 
         cursor.getString(5), 
         cursor.getString(6), 
         cursor.getInt(7), 
         cursor.getInt(8))); 

      }while (cursor.moveToNext()); 
     } 
    } 
} 


public void add(Contact data){ 
    items.add(data); 
    setItem(items); 
} 

} 

================ボタンのクリックイベントで========================

DiaryFragment

case R.id.IV_diary_save: 
      if(EDT_diary_title.getText().toString().trim() != null && EDT_diary_title.getText().toString().trim().length() != 0){ 

       if(EDT_diary_content.getText().toString().trim() != null && EDT_diary_content.getText().toString().trim().length() != 0){ 

        dbHelper.D_insertData(EDT_diary_title.getText().toString(), EDT_diary_content.getText().toString(), 
          TV_diary_month.getText().toString(), TV_diary_date.getText().toString(), TV_diary_day.getText().toString(), 
          TV_diary_time.getText().toString(), 
          diaryInfoHelper.getMoodResourceId(SP_diary_weather.getSelectedItemPosition()), 
          diaryInfoHelper.getWeatherResourceId(SP_diary_mood.getSelectedItemPosition()) 
        ); 

        myAdapter.add(new Contact 
          (String.valueOf(dbHelper.getRow()),EDT_diary_title.getText().toString(), EDT_diary_content.getText().toString(), 
            TV_diary_month.getText().toString(), TV_diary_date.getText().toString(), TV_diary_day.getText().toString(), 
            TV_diary_time.getText().toString(), 
            diaryInfoHelper.getMoodResourceId(SP_diary_weather.getSelectedItemPosition()), 
            diaryInfoHelper.getWeatherResourceId(SP_diary_mood.getSelectedItemPosition()) 
          )); 


        Toast.makeText(v.getContext(), "Success to Insert", Toast.LENGTH_SHORT).show(); 


        ((TabActivity)getActivity()).getViewPager().setCurrentItem(0); 


        EDT_diary_title.setText(""); 
        EDT_diary_content.setText(""); 

       }else { 
        Toast.makeText(v.getContext(), "Content is Empty ", Toast.LENGTH_SHORT).show(); 
        EDT_diary_content.setText(""); 
       } 
      }else { 
       Toast.makeText(v.getContext(), "Title is Empty ", Toast.LENGTH_SHORT).show(); 
       EDT_diary_title.setText(""); 
      } 
      break; 

========== =========================

DiaryFragmentで

ボタンクリックは、

すぐに新しい項目の挿入データを変更するタブRecycleFragmentと

RecycleFragmentのコンテンツを移動します。

今、ボタンをクリックするとDiaryFragment リサイクルフラグメントは変更されません。

変更リサイクルフラグメント。私はRecycleFragmentを終了し、RecycleFragmentを再開します。

は、次の手順を実行し

Answer 1

に感謝私を助けてください：

1. create and interface in dairy. 
2. Write A method in it. 
3. create the object of this interface and initialize. 
4. create a setter for this object. 
5. Now in Recycle Fragment implement this interface. 
6. Now finally write you code inside the overridden method of interface 

はのは、この例を見てみましょう。インタフェースを宣言するための 。

private getBusinessList list; 

    public void setList(getBusinessList list) { 
     this.list = list; 
    } 


    public interface getBusinessList { 
     void result(boolean b, String msg,JSONArray array); 
    } 

nowリサイクル業者の中にあります。

public class SplashActivity extends AppCompatActivity implements ServerCall.getBusinessList 

インターフェイスオブジェクトを初期化します。

serverCall.setBusinessList(this); 

これは私のインターフェイス実装方法です。

​​

あなたはあなたのコードをそのメソッドの中に書くことができます。