Android:RecyclerView 行可见性无法正常工作 [英] Android : RecyclerView row Visibility not working properly

问题描述

我正在开发一个 Android 应用程序 (Android Studio).我想在每一行中实现 Visibility GONE/VISIBLE.在图像中有三个 recyclerView 行，

我想做以下事情:

每行有两个部分标题 &详情.

1. 当此活动打开时，所有行的详细信息都应隐藏.
2. 当我单击特定行时，该行的详细信息应显示在可见性可见.

3. 当我再次单击行详细信息时，Visibility GONE 应该会消失.

   问题是:如果我单击第一行，则显示第一行的详细信息并且单击下一个任何行标题时，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.

   这是完整的解决方案.如果有任何疑问，您可以询问.

   I am developing an android app (Android Studio). I want to implement Visibility GONE/VISIBLE in every row. In the image there are three recyclerView rows,

   I want to do the following things :

   There are two part in every row Heading & Details.

   1. When This Activity open all the rows details should hide.
   2. When I click on particular row , details of the row should appear by Visibility VISIBLE.

   3. When i again click on row details should disappear by Visibility GONE.

      Problem is : If i clicked on first row, Details of first row is showing and without hiding details of first row when click on next any row Heading. I have to click two times to show the details of the next row or Hide the details of next row.

      Image One Here

      Image Two Here

   Adapter Code :

   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);
   
                   }
               }
           });
   

   解决方案

   Here is how you can achieve it without extended listView

   Your card or itemView will be something like

   <?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>
   

   YOUR adapter

   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);
           }
   
       }
   }
   

   YOUR BEAN class I have taken only title into account you can add details here also

   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;
       }
   }
   

   How to attach this to 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++;
       }
   }
   

   final answer will look like

   this is the complete solution. if there are any doubts you can ask.

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