SearchViewはRecyclerViewとSQLiteで動作しません

Question

FragmentにはRecyclerViewがあります。ユーザーはデータを入力し、SQLite DataBaseに格納されます。私はこのRecyclerViewのitemsにSearchにしようとしていますが、それは動作しません、ここで

は私Fragment次のとおりです。

public class FragmentOne extends Fragment { 

private RecyclerView mDetailRecyclerView; 
private DetailAdapter mAdapter; 
private boolean mNumberVisible; 
private SearchView sv; 
private ArrayList<Detail> mDetails=new ArrayList<>(); 

private View view; 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setHasOptionsMenu(true); 
} 

@Override 
public View onCreateView(LayoutInflater inflater, 
         ViewGroup container, 
         Bundle savedInstanceState) { 
    view = inflater.inflate(R.layout.fragment_one_layout, 
      container, false); 

    mDetailRecyclerView = (RecyclerView) view.findViewById(R.id.detail_recycler_view); 

    LinearLayoutManager layoutManager = new LinearLayoutManager(getContext()); 
    layoutManager.setReverseLayout(true); //This will reverse the data order but not scroll the RecyclerView to the last item 
    layoutManager.setStackFromEnd(true); //For keeping data order same and simply scrolling the RecyclerView to the last item 
    mDetailRecyclerView.setLayoutManager(layoutManager); 

    if (savedInstanceState != null) { 
     mNumberVisible = 
       savedInstanceState.getBoolean(SAVED_NUMBER_VISIBLE); 
    } 

    sv = (SearchView) view.findViewById(R.id.sv); 
    mAdapter = new DetailAdapter(mDetails); 

    sv.setOnQueryTextListener(new SearchView.OnQueryTextListener() { 
     @Override 
     public boolean onQueryTextSubmit (String query) { 
      return false; 
     } 

     @Override 
     public boolean onQueryTextChange(String query) { 
      getDetailsSearch(query); 
      return false; 
     } 
    }); 

    initViews(); 
    updateUI(); 
    return view; 


} 

@Override 
public void onResume() { 
    super.onResume(); 
    updateUI(); 
} 



    @Override 
    public void onSaveInstanceState(Bundle outState) { 
     super.onSaveInstanceState(outState); 
     outState.putBoolean(SAVED_NUMBER_VISIBLE, mNumberVisible); 
    } 

.. 
.. 
private class DetailHolder extends RecyclerView.ViewHolder 
     implements View.OnClickListener, View.OnLongClickListener { 
    private TextView mTitleTextView; 
    //  private TextView mDateTextView; 
    private Detail mDetail; 
    private RatingBar mRatingBar; 

    public DetailHolder(LayoutInflater inflater, ViewGroup parent) { 
     super(inflater.inflate(R.layout.list_item_detail, 
       parent, false)); 

     itemView.setOnClickListener(this); 
     itemView.setOnLongClickListener(this); 
     mTitleTextView = (TextView) itemView.findViewById(R.id.detail_title); 
     mRatingBar = (RatingBar) itemView.findViewById(R.id.ratingBar); 
    } 

    public void bind(Detail detail) { 
     mDetail = detail; 
     mTitleTextView.setText(mDetail.getTitle()); 
     mRatingBar.setRating(mDetail.getRate()); 
    } 

    @Override 
    public void onClick(View view) { 
     Intent intent = DetailPagerActivity.newIntent(getActivity(), 
       mDetail.getId()); 
     startActivity(intent); 
    } 
} 


private class DetailAdapter extends RecyclerView.Adapter<DetailHolder> { 
    private List<Detail> mDetails; 
    private Detail mDetail; 

    public DetailAdapter(List<Detail> details) { 
     mDetails = details; 
    } 

    @Override 
    public DetailHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
     LayoutInflater layoutInflater = LayoutInflater.from(getActivity()); 
     return new DetailHolder(layoutInflater, parent); 
    } 

    @Override 
    public void onBindViewHolder(DetailHolder holder, int position) { 
     Detail detail = mDetails.get(position); 
     holder.bind(detail); 
    } 

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

    public void setDetails(final List<Detail> details) { 
     mDetails = details; 
    } 

    .. 
    .. 

} 

public void initViews(){ 
    mDetailRecyclerView.setAdapter(mAdapter); 
    initSwipe(); 
} 

.. 
.. 

private void getDetailsSearch (String searchTerm) { 
    mDetails.clear(); 

    DBAdapter db = new DBAdapter(getActivity()); 
    db.openDB(); 
    Detail p = null; 
    Cursor c = db.retrieve(searchTerm); 

    while (c.moveToNext()) { 
     String title = c.getString(2); 

     p = new Detail(); 
     p.setTitle(title); 

     mDetails.add(p); 
    } 

    db.closeDB(); 
    mDetailRecyclerView.setAdapter(mAdapter); 
} 
} 

、これが私のDatabase Adapterです：

public class DBAdapter { 
    Context c; 
    SQLiteDatabase db; 
    DetailBaseHelper helper; 

    public DBAdapter (Context c) { 
     this.c = c; 
     helper = new DetailBaseHelper(c); 
    } 

    public void openDB() { 
     try { 
      db = helper.getWritableDatabase(); 
     } catch (SQLException e) { 
      e.printStackTrace(); 
     } 
    } 

    public void closeDB() { 
     try { 
      helper.close(); 
     } catch (SQLException e) { 
      e.printStackTrace(); 
     } 
    } 

    public Cursor retrieve (String searchTerm) { 
     String[] columns = { 
      "_id", 
      "uuid", 
      "title", 
      "des", 
      "date", 
      "rate" 
     Cursor c = null; 

     if (searchTerm != null && searchTerm.length()>0) { 
      String sql ="SELECT * FROM " +DetailDbSchema.DetailTable.NAME+ 
        " WHERE "+DetailDbSchema.DetailTable.Cols.TITLE+ 
        " LIKE '%"+searchTerm+"%'"; 
      c = db.rawQuery(sql, null); 
      return c; 
     } 

     c = db.query(DetailDbSchema.DetailTable.NAME, columns, 
       null, null, null, null, null); 
     return c; 
    } 
} 

とここにあるDataBase Helper ：

public class DetailBaseHelper extends SQLiteOpenHelper{ 
    private static final int VERSION = 1; 
    private static final String DATABASE_NAME = "detailBase.db"; 

    public DetailBaseHelper (Context context) { 
     super(context, DATABASE_NAME, null, VERSION); 
    } 

    @Override 
    public void onCreate (SQLiteDatabase db) { 
     db.execSQL("create table " + DetailTable.NAME + 
       "(" + 
       " _id integer primary key autoincrement," + 
       DetailTable.Cols.UUID + ", " + 
       DetailTable.Cols.TITLE + ", " + 
       DetailTable.Cols.DES + ", " + 
       DetailTable.Cols.DATE + ", " + 
       DetailTable.Cols.RATE + 
       ")" 
     ); 
    } 

    @Override 
    public void onUpgrade (SQLiteDatabase db, 
          int oldVersion, int newVersion) { 
    } 
} 

hereは、私がこれに使ったチュートリアルです。 私が私を助けてくれると感謝します。

Answer 1

主な問題はアダプターを変更することですが、新しいアダプターは結果のデータによって変更されていないと考えています。また、データセットが変更されたことをリサイクラーに通知する必要があります。

private void getDetailsSearch (String searchTerm) { 
mDetails.clear(); 
/// the loop wiith the cursor 

/// change the dataset 
mAdapter = new DetailAdapter(mDetails); 

mDetailRecyclerView.setAdapter(mAdapter); 

/// tell the recycler there is a different data to display 
mDetailRecyclerView.notifyDataSetChanged(); 

}