sql >> データベース >  >> RDS >> SQLite

RecyclerViewでのデータの表示

    試すことができます

    1. あなたの活動の中で

      ArrayList<Author> authors = dbHandler. getAllAuthors();
      recyclerView.setHasFixedSize(true);
      
      // ListView
      recyclerView.setLayoutManager(new LinearLayoutManager(youractivity.this));
      
      
      // create an Object for Adapter
      CardViewDataAdapter1  mAdapter = new CardViewDataAdapter1(authors);
      
      // set the adapter object to the Recyclerview
      recyclerView.setAdapter(mAdapter);
      
    2. アダプターは次のようになります

       class CardViewDataAdapter1 extends RecyclerView.Adapter<CardViewDataAdapter1.ViewHolder> {
         private ArrayList<Author> dataSet;
      
      
      public CardViewDataAdapter1(ArrayList<Author> os_versions) {
      
          dataSet = os_versions;
      }
      
      
      @Override
      public CardViewDataAdapter1.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
        // create a new view
          View itemLayoutView = LayoutInflater.from(viewGroup.getContext()).inflate(
                  R.layout.recycler_item, null);
      
          itemLayoutView.setLayoutParams(new RecyclerView.LayoutParams(RecyclerView.LayoutParams.MATCH_PARENT, RecyclerView.LayoutParams.WRAP_CONTENT));
      
          // create ViewHolder
      
          CardViewDataAdapter1.ViewHolder viewHolder = new CardViewDataAdapter1.ViewHolder(itemLayoutView);
      
          return viewHolder;
      }
      
      @Override
      public void onBindViewHolder(CardViewDataAdapter1.ViewHolder viewHolder, int i) {
      
          Author fp = dataSet.get(i);
      
          viewHolder.tv_name.setText(fp.getName());
      
      
      
      
          viewHolder.menu = fp;
      }
      
      @Override
      public int getItemCount() {
      
          return dataSet.size();
      }
      
      public void updateList(List<Author> temp) {
          dataSet = (ArrayList<Author>) temp;
          notifyDataSetChanged();
      }
      
      // inner class to hold a reference to each item of RecyclerView
      public  class ViewHolder extends RecyclerView.ViewHolder {
      
          public TextView tv_name;
      
      
          public Author menu;
          public ViewHolder(View itemLayoutView) {
              super(itemLayoutView);
      
              tv_name = (TextView) itemLayoutView  .findViewById(R.id.tv_name);
      
      
             }
      
         }
       }
      
    3. recycler_item.xml

      <?xml version="1.0" encoding="utf-8"?>
         <android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:card_view="http://schemas.android.com/apk/res-auto"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        card_view:cardCornerRadius="5dp"
       card_view:cardBackgroundColor="#FFFFFF"
          card_view:cardUseCompatPadding="true"
         >
      <LinearLayout
        android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:orientation="vertical">
          <TextView
              android:id="@+id/tv_name"
              android:layout_width="match_parent"
               android:layout_height="wrap_content"
              android:text="Enamul"/>
      
       </LinearLayout>
      
      </android.support.v7.widget.CardView>
      



    1. MySQLは、あるデータベースから別のデータベースに挿入します

    2. 1つの行をより少ない列で複数の行に変換します

    3. Oracleデータベースバックアップの概要

    4. Oracleで日付を別の形式で表示する方法