如何在 Android 中为 RecyclerView 设置 LayoutManager

Question

在我的应用程序中，我想显示一些 RecyclerViews。
我想在一行中显示 3 个项目，我的应用程序应该使用 4 recyclerView，因为每个 recyclerVews 相互数据API。

在RecyclerView 之一中，我可以在一行中显示3 个项目，我应该在此RecyclerView 上方显示另外3 个recyclerViews。

请看这张图片来理解我的意思：

我用 Java 编写以下代码：

if (movieResponse.getData().getStars().size() > 0) {
                            starsModel.clear();
                            starsModel.addAll(movieResponse.getData().getStars());
                            castAdapter = new CastAdapter(context, starsModel);
                            infoEpisodeFrag_CastRecyclerView.setLayoutManager(new GridLayoutManager(context, 3));
                            infoEpisodeFrag_CastRecyclerView.setHasFixedSize(true);
                            infoEpisodeFrag_CastRecyclerView.setNestedScrollingEnabled(false);
                            infoEpisodeFrag_CastRecyclerView.setAdapter(castAdapter);
                        } else {
                            goneView(infoEpisodeFrag_CastRecyclerView);
                        }
                        //Get Directors
                        if (movieResponse.getData().getDirectors().size() > 0) {
                            directorsModel.clear();
                            directorsModel.add(movieResponse.getData().getDirectors().get(0));
                            directorAdapter = new DirectorAdapter(context, directorsModel);
                            infoEpisodeFrag_DirectorRecyclerView.setLayoutManager(new GridLayoutManager(context, 1));
                            infoEpisodeFrag_DirectorRecyclerView.setHasFixedSize(true);
                            infoEpisodeFrag_DirectorRecyclerView.setNestedScrollingEnabled(false);
                            infoEpisodeFrag_DirectorRecyclerView.setAdapter(directorAdapter);
                        } else {
                            goneView(infoEpisodeFrag_DirectorRecyclerView);
                        }
                        //Get Writers
                        if (movieResponse.getData().getWriters().size() > 0) {
                            writersModel.clear();
                            writersModel.add(movieResponse.getData().getWriters().get(0));
                            writerAdapter = new WriterAdapter(context, writersModel);
                            infoEpisodeFrag_WriterRecyclerView.setLayoutManager(new GridLayoutManager(context, 1));
                            infoEpisodeFrag_WriterRecyclerView.setHasFixedSize(true);
                            infoEpisodeFrag_WriterRecyclerView.setNestedScrollingEnabled(false);
                            infoEpisodeFrag_WriterRecyclerView.setAdapter(writerAdapter);
                        } else {
                            invisibleView(infoEpisodeFrag_WriterRecyclerView);
                        }
                        //Get Writers2
                        if (movieResponse.getData().getWriters().size() > 0) {
                            writersModel.clear();
                            writersModel.add(movieResponse.getData().getWriters().get(0));
                            writerAdapter = new WriterAdapter(context, writersModel);
                            infoEpisodeFrag_WriterRecyclerView2.setLayoutManager(new GridLayoutManager(context, 1));
                            infoEpisodeFrag_WriterRecyclerView2.setHasFixedSize(true);
                            infoEpisodeFrag_WriterRecyclerView2.setNestedScrollingEnabled(false);
                            infoEpisodeFrag_WriterRecyclerView2.setAdapter(writerAdapter);
                        }

我的 XML 代码：

                <android.support.v7.widget.RecyclerView
                    android:id="@+id/infoEpisodeFrag_DirectorRecyclerView"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_below="@+id/infoEpisodeFrag_CastLay"
                    android:layout_marginBottom="@dimen/padding5" />

                <android.support.v7.widget.RecyclerView
                    android:id="@+id/infoEpisodeFrag_WriterRecyclerView"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_below="@+id/infoEpisodeFrag_CastLay"
                    android:layout_marginBottom="@dimen/padding5"
                    android:layout_toRightOf="@+id/infoEpisodeFrag_DirectorRecyclerView" />

                <android.support.v7.widget.RecyclerView
                    android:id="@+id/infoEpisodeFrag_WriterRecyclerView2"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_below="@+id/infoEpisodeFrag_CastLay"
                    android:layout_marginBottom="@dimen/padding5"
                    android:layout_toRightOf="@+id/infoEpisodeFrag_WriterRecyclerView"
                    android:visibility="visible" />

                <android.support.v7.widget.RecyclerView
                    android:id="@+id/infoEpisodeFrag_CastRecyclerView"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_below="@+id/infoEpisodeFrag_WriterRecyclerView"
                    android:layout_marginBottom="@dimen/padding5" />

如何在recyclerView下方显示3个recyclerview's项目对齐？

Answer 1

使用 Horizontal RecyclerView 而不是 Grid 并且使用 starsModel.subList(0,3); 仅传递 3 项

castAdapter = new CastAdapter(context, starsModel.subList(0,3));
LinearLayoutManager layoutManager= new LinearLayoutManager(this, LinearLayoutManager.HORIZONTAL, false);
infoEpisodeFrag_DirectorRecyclerView.setLayoutManager(layoutManager);