Android：RecyclerView 行可见性无法正常工作

Question

我正在开发 android 应用程序 (Android Studio)。我想在每一行中实现 Visibility GONE/VISIBLE 。图像中有三 recyclerView 行，

我想做以下事情:

每行有两部分标题 & 详情.

当此 Activity 打开所有行详细信息时应隐藏。
当我单击特定行时，该行的详细信息应显示为能见度 VISIBLE.
当我再次单击行详细信息时，Visibility GONE 应该会消失。

问题是：如果我点击第一行，会显示第一行的详细信息并且单击下一个任意行标题时不隐藏第一行的详细信息。我有单击两次以显示下一行的详细信息或隐藏详细信息下一行。

Image One Here

Image Two Here

适配器代码：

int i = 0;
holder.salt_head_ll.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                i++;
                if (i % 2 == 1) {
                    holder.have_show_ll.setVisibility(View.VISIBLE);
                    holder.l1_arrow.setImageResource(R.drawable.down_arrow_black);

                } else if (i % 2 == 0) {
                    holder.have_show_ll.setVisibility(View.GONE);
                    holder.l1_arrow.setImageResource(R.drawable.right_arrow_black);

                }
            }
        });

Answer 1

这是我的建议，不要使用 RecyclerView，你必须尝试 ExpandableListView。 ExpandableListView 的示例是 here，如果您想要列表中的单个 child，则设置：

@Override
public int getChildrenCount(int groupPosition) {
    return 1;
}

Answer 2

这里是你如何在没有扩展 listView 的情况下实现它

您的卡片或 itemView 将类似于

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:padding="10dp"
        android:id="@+id/tvTitle"
        />

    <!--this is your detail view layout, modify it accordingly-->
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:id="@+id/detail"
        android:visibility="gone">
        <TextView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:textSize="16sp"
            android:text="detail goes here\n and here\n and here"/>
    </LinearLayout>
    <View
        android:layout_width="match_parent"
        android:layout_height="1dp"
        android:background="#747474"/>
</LinearLayout>

您的适配器

public class SecondAdapter extends RecyclerView.Adapter<SecondAdapter.ViewHolder>{

    private List<TextBean> data;
    private Context context;

    public SecondAdapter(Context context, List<TextBean> data){
        this.context = context;
        this.data = data;
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(context).inflate(R.layout.card_second, parent , false);
        return new ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(final ViewHolder holder, int position) {
        final TextBean textBean = data.get(position);
        holder.title.setText(textBean.getTitle());
        if(textBean.isVisibility())
            holder.detailLayout.setVisibility(View.VISIBLE);
        else
            holder.detailLayout.setVisibility(View.GONE);

        holder.itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if(textBean.isVisibility()){
                    textBean.setVisibility(false);
                    holder.detailLayout.setVisibility(View.GONE);
                    notifyDataSetChanged();
                }else{
                    textBean.setVisibility(true);
                    holder.detailLayout.setVisibility(View.VISIBLE);
                    notifyDataSetChanged();
                }
            }
        });
    }

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

    public class ViewHolder extends RecyclerView.ViewHolder{
        public TextView title;
        public LinearLayout detailLayout;
        public ViewHolder(View item){
            super(item);

            title = (TextView)item.findViewById(R.id.tvTitle);
            detailLayout = (LinearLayout) item.findViewById(R.id.detail);
        }

    }
}

你的豆子class 我只考虑了标题，您也可以在此处添加详细信息

public class TextBean {

    private String title;
    private boolean visibility; // donot forget this, this is to handle visibility

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public boolean isVisibility() {
        return visibility;
    }

    public void setVisibility(boolean visibility) {
        this.visibility = visibility;
    }
}

如何将其附加到 RecyclerView

public class SecondActivity extends AppCompatActivity {

    List<TextBean> data = new ArrayList<>();

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

        RecyclerView recyclerView = (RecyclerView)findViewById(R.id.recyclerView);
        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);
        linearLayoutManager.setOrientation(LinearLayoutManager.VERTICAL);
        recyclerView.setLayoutManager(linearLayoutManager);
        populatedata(); // populate your data here
        SecondAdapter secondAdapter = new SecondAdapter(this,data);
        recyclerView.setAdapter(secondAdapter);
    }

    public void populatedata(){
        int count = 1;
        TextBean textBean = new TextBean();
        textBean.setTitle("Title"+count);
        textBean.setVisibility(false); // keep them false in beginning
        data.add(textBean);
        count++;

        textBean = new TextBean();
        textBean.setTitle("Title"+count);
        textBean.setVisibility(false);
        data.add(textBean);
        count++;

        textBean = new TextBean();
        textBean.setTitle("Title"+count);
        textBean.setVisibility(false);
        data.add(textBean);
        count++;

        textBean = new TextBean();
        textBean.setTitle("Title"+count);
        textBean.setVisibility(false);
        data.add(textBean);
        count++;

        textBean = new TextBean();
        textBean.setTitle("Title"+count);
        textBean.setVisibility(false);
        data.add(textBean);
        count++;

        textBean = new TextBean();
        textBean.setTitle("Title"+count);
        textBean.setVisibility(false);
        data.add(textBean);
        count++;
    }
}

最终答案看起来像

这是完整的解决方案。有什么疑问可以问

Answer 3

首先按照以下步骤为您的适配器创建一个点击监听器：

 public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{
public ViewHolder(View itemView) {
            super(itemView);
itemView.setOnClickListener(this);
 @Override
        public void onClick(View view) {
            if (clicklistener != null) {
                clicklistener.itemClicked("adapter intials", view, getAdapterPosition());
            }
        }
    }

    public void setClickListener(RecycleListener clicklistener) {
        this.clicklistener = clicklistener;
    }}

创建接口class:

    // interface designed to handle list view click events
public interface RecycleListener {

    // adapterPage argument for identifying the adapter it is clicked from.
    void itemClicked(String adapterPage, View view, int position);
//    public void selfItemClicked(View view, int position);
}

然后在你的 activity 中使用这个 RecycleListener 实现它会给你覆盖方法

@Override
    public void itemClicked(final String adapterType, View view, final int position) {
    //here control visibility of your layout using position and view
    // find your view using this view
}

Answer 4

尝试在代码中添加一个标志，并基于该标志在 onBindViewHolder 中添加可见性逻辑。

@Override
public void onBindViewHolder(@NonNull final ProductViewHolder holder, final int position) {
holder.linearLayoutItemButton.setVisibility(canShow(productOrderList.get(position))?
            View.VISIBLE : View.GONE);
holder.addButton.setVisibility(canShow(productOrderList.get(position))?
            View.GONE : View.VISIBLE);

Android：RecyclerView 行可见性无法正常工作

Android : RecyclerView row Visibility not working properly

android

android-adapter

android-studio

android-recyclerview