Настройка вида рециркулятора / карты с макетом сетки внутри фрагмента - PullRequest
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Настройка вида рециркулятора / карты с макетом сетки внутри фрагмента

0 голосов
/ 08 октября 2018

Я пытаюсь принять программу, которая использует Recyclerview и представление карты для отображения макета сетки (в данном случае, библиотеки книг) в пределах одного фрагмента.Это оригинальный метод.Это было в методе MainActivity: 

public class MainActivity extends AppCompatActivity {

    List<Book> lstBook;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        lstBook = new ArrayList<>();
        lstBook.add(new Book("The Vegitarian","Categorie Book","Description book",R.drawable.thevigitarian));
        lstBook.add(new Book("The Wild Robot","Categorie Book","Description book",R.drawable.thewildrobot));
        lstBook.add(new Book("Maria Semples","Categorie Book","Description book",R.drawable.mariasemples));
        lstBook.add(new Book("The Martian","Categorie Book","Description book",R.drawable.themartian));
        lstBook.add(new Book("He Died with...","Categorie Book","Description book",R.drawable.hediedwith));
        lstBook.add(new Book("The Vegitarian","Categorie Book","Description book",R.drawable.thevigitarian));
        lstBook.add(new Book("The Wild Robot","Categorie Book","Description book",R.drawable.thewildrobot));
        lstBook.add(new Book("Maria Semples","Categorie Book","Description book",R.drawable.mariasemples));
        lstBook.add(new Book("The Martian","Categorie Book","Description book",R.drawable.themartian));
        lstBook.add(new Book("He Died with...","Categorie Book","Description book",R.drawable.hediedwith));
        lstBook.add(new Book("The Vegitarian","Categorie Book","Description book",R.drawable.thevigitarian));
        lstBook.add(new Book("The Wild Robot","Categorie Book","Description book",R.drawable.thewildrobot));
        lstBook.add(new Book("Maria Semples","Categorie Book","Description book",R.drawable.mariasemples));
        lstBook.add(new Book("The Martian","Categorie Book","Description book",R.drawable.themartian));
        lstBook.add(new Book("He Died with...","Categorie Book","Description book",R.drawable.hediedwith));

        RecyclerView myrv = (RecyclerView) findViewById(R.id.recyclerview_id);
        RecyclerViewAdapter myAdapter = new RecyclerViewAdapter(this,lstBook);
        myrv.setLayoutManager(new GridLayoutManager(this,3));
        myrv.setAdapter(myAdapter);
    }
}

И это то, что я пытался сделать.Я пытаюсь имитировать то же самое внутри фрагмента: 

public class LibraryFragment extends Fragment {

    List<Book> lstBook;
    RecyclerView myrv;
    private RecyclerView.Adapter myAdapter;


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        return inflater.inflate(R.layout.item_library, null);

        lstBook = new ArrayList<>();
        lstBook.add(new Book("The Vegitarian","Categorie Book","Description book",R.drawable.thevigitarian));
        lstBook.add(new Book("The Wild Robot","Categorie Book","Description book",R.drawable.thewildrobot));
        lstBook.add(new Book("Maria Semples","Categorie Book","Description book",R.drawable.mariasemples));
        lstBook.add(new Book("The Martian","Categorie Book","Description book",R.drawable.themartian));
        lstBook.add(new Book("He Died with...","Categorie Book","Description book",R.drawable.hediedwith));
        lstBook.add(new Book("The Vegitarian","Categorie Book","Description book",R.drawable.thevigitarian));
        lstBook.add(new Book("The Wild Robot","Categorie Book","Description book",R.drawable.thewildrobot));
        lstBook.add(new Book("Maria Semples","Categorie Book","Description book",R.drawable.mariasemples));
        lstBook.add(new Book("The Martian","Categorie Book","Description book",R.drawable.themartian));
        lstBook.add(new Book("He Died with...","Categorie Book","Description book",R.drawable.hediedwith));
        lstBook.add(new Book("The Vegitarian","Categorie Book","Description book",R.drawable.thevigitarian));
        lstBook.add(new Book("The Wild Robot","Categorie Book","Description book",R.drawable.thewildrobot));
        lstBook.add(new Book("Maria Semples","Categorie Book","Description book",R.drawable.mariasemples));
        lstBook.add(new Book("The Martian","Categorie Book","Description book",R.drawable.themartian));
        lstBook.add(new Book("He Died with...","Categorie Book","Description book",R.drawable.hediedwith));

    **myrv = (RecyclerView) myrv.findViewById(R.id.my_recycler_view);
        myAdapter = new myAdapter(lstBook);
        myrv.setLayoutManager(new GridLayoutManager(this,3));
        myrv.setAdapter(myAdapter);**
    }
}

У меня возникли некоторые проблемы с последними четырьмя строками кода, из-за которых я не могу разрешить myAdapter и GridLayoutManager, которые не были правильно применены,У кого-нибудь есть какие-нибудь указатели для решения моей проблемы?Или кто-то может указать мне на подобную проблему?

1 Ответ

0 голосов
/ 09 октября 2018

Любой код после return будет недоступен, поэтому return должна быть последней строкой.Также во фрагменте это неверно, замените его на getContext () или getActivity () .Попробуйте следующий код: 

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.item_library, null);

    lstBook = new ArrayList<>();
    lstBook.add(new Book("The Vegitarian","Categorie Book","Description book",R.drawable.thevigitarian));
    lstBook.add(new Book("The Wild Robot","Categorie Book","Description book",R.drawable.thewildrobot));
    lstBook.add(new Book("Maria Semples","Categorie Book","Description book",R.drawable.mariasemples));
    lstBook.add(new Book("The Martian","Categorie Book","Description book",R.drawable.themartian));
    lstBook.add(new Book("He Died with...","Categorie Book","Description book",R.drawable.hediedwith));
    lstBook.add(new Book("The Vegitarian","Categorie Book","Description book",R.drawable.thevigitarian));
    lstBook.add(new Book("The Wild Robot","Categorie Book","Description book",R.drawable.thewildrobot));
    lstBook.add(new Book("Maria Semples","Categorie Book","Description book",R.drawable.mariasemples));
    lstBook.add(new Book("The Martian","Categorie Book","Description book",R.drawable.themartian));
    lstBook.add(new Book("He Died with...","Categorie Book","Description book",R.drawable.hediedwith));
    lstBook.add(new Book("The Vegitarian","Categorie Book","Description book",R.drawable.thevigitarian));
    lstBook.add(new Book("The Wild Robot","Categorie Book","Description book",R.drawable.thewildrobot));
    lstBook.add(new Book("Maria Semples","Categorie Book","Description book",R.drawable.mariasemples));
    lstBook.add(new Book("The Martian","Categorie Book","Description book",R.drawable.themartian));
    lstBook.add(new Book("He Died with...","Categorie Book","Description book",R.drawable.hediedwith));

    myrv = (RecyclerView) rootView.findViewById(R.id.my_recycler_view);
    myAdapter = new myAdapter(getContext(), lstBook);
    myrv.setLayoutManager(new GridLayoutManager(getContext(), 3));
    myrv.setAdapter(myAdapter);

    return rootView;
}

Надеюсь, это поможет!

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