如何在 RecyclerView 的一项中找到两个文本块？

Posted 2023-04-18

【中文标题】如何在 RecyclerView 的一项中找到两个文本块？

【英文标题】：How can I locate two text blocks in one item in RecyclerView?

【发布时间】：2019-10-30 21:57:45

【问题描述】：

我已经创建了带有视图持有者和一个列表的 RecyclerView。但我需要一个 textView 开始，第二个结束。我该怎么做？

我用两个 TextViews 创建了布局，那里已经有位置了。但我应该为第一个 textView animalNames 和第二个 - peopleNames 设置。 这是我的代码：

MainActivity.java

public class MainActivity extends AppCompatActivity 
    MyRecyclerViewAdapter adapter;

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

        ArrayList<String> animalNames = new ArrayList<>();
        animalNames.add("Horse");
        animalNames.add("Cow");
        animalNames.add("Camel");
        animalNames.add("Sheep");
        animalNames.add("Goat");


        ArrayList<String> peopleNames = new ArrayList<>();
        animalNames.add("Harry");
        animalNames.add("John");
        animalNames.add("Sergey");
        animalNames.add("Steve");
        animalNames.add("Woody");

        RecyclerView recyclerView = findViewById(R.id.rvAnimals);
        recyclerView.setLayoutManager(new LinearLayoutManager(this));
        adapter = new MyRecyclerViewAdapter(this, animalNames);
        recyclerView.setAdapter(adapter);
        adapter.setClickListener(new MyRecyclerViewAdapter.ItemClickListener() 
            @Override
            public void onItemClick(View view, int position) 
                Toast.makeText(getApplicationContext(), "You clicked " + adapter.getItem(position) + " on row number " + position, Toast.LENGTH_SHORT).show();
            
        );
    

MyRecyclerViewAdapter.java

public class MyRecyclerViewAdapter extends RecyclerView.Adapter<MyRecyclerViewAdapter.ViewHolder> 
    private List<String> mData;
    private LayoutInflater mInflater;
    private ItemClickListener mClickListener;

    MyRecyclerViewAdapter(Context context, List<String> data) 
        this.mInflater = LayoutInflater.from(context);
        this.mData = data;
    

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) 
        View view = mInflater.inflate(R.layout.custom_view, parent, false);
        return new ViewHolder(view);
    

    @Override
    public void onBindViewHolder(ViewHolder holder, int position) 
        String animal = mData.get(position);
        holder.myTextView.setText(animal);
    

    @Override
    public int getItemCount() 
        return mData.size();
    


    public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener 
        TextView myTextView;
        TextView myTextView2;

        ViewHolder(View itemView) 
            super(itemView);
            myTextView = itemView.findViewById(R.id.tvAnimalName);
            myTextView2 = itemView.findViewById(R.id.tvAnimalName2);
            itemView.setOnClickListener(this);
        

        @Override
        public void onClick(View view) 
            if (mClickListener != null) mClickListener.onItemClick(view, getAdapterPosition());
        
    

    String getItem(int id) 
        return mData.get(id);
    

    void setClickListener(ItemClickListener itemClickListener) 
        this.mClickListener = itemClickListener;
    

    public interface ItemClickListener 
        void onItemClick(View view, int position);
    

custom_view.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_
    android:layout_
    android:orientation="horizontal"
    android:padding="10dp">

    <TextView
        android:id="@+id/tvAnimalName"
        android:layout_
        android:layout_
        android:layout_alignParentStart="true"
        android:layout_marginStart="8dp"
        android:textSize="20sp" />


    <TextView
        android:id="@+id/tvPersonName"
        android:layout_
        android:layout_
        android:layout_alignParentEnd="true"
        android:layout_marginEnd="8dp"
        android:textSize="20sp" />

</RelativeLayout>

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_
    android:layout_>

    <android.support.v7.widget.RecyclerView
        android:id="@+id/rvAnimals"
        android:layout_
        android:layout_/>

</RelativeLayout>

【参考方案1】：

    Pass the person array list also in the constructor of the recycler view

    //like in activity
    RecyclerView recyclerView = findViewById(R.id.rvAnimals);
        recyclerView.setLayoutManager(new LinearLayoutManager(this));
        adapter = new MyRecyclerViewAdapter(this, animalNames,personNames);

    //in adapter class
    create a list for person also
    private List<String> mData;
    private List<String> mpersonData;

    // adapter constructor
    MyRecyclerViewAdapter(Context context, List<String> data,List<String> mpersonData) 
        this.mInflater = LayoutInflater.from(context);
        this.mData = data;
    this.mpersonData = mpersonData;
    

    //onbind view holder

    @Override
    public void onBindViewHolder(ViewHolder holder, int position) 
        String animal = mData.get(position);
        String person = mData.get(position);
        holder.myTextView.setText(animal);
    holder.myTextView.setText(person);
    

    //change the tv id name to person
      ViewHolder(View itemView) 
            super(itemView);
            myTextView = itemView.findViewById(R.id.tvAnimalName);
            // just change this to person name
            myTextView2 = itemView.findViewById(R.id.tvPersonalName);
            itemView.setOnClickListener(this);
        

    Now you will set person name also in the recycler view text field


Paste this code instead of relative layout use linear layout

    <?xml version="1.0" encoding="utf-8"?>
    <LinearLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_
        android:layout_
        android:orientation="horizontal"
        android:padding="10dp">

        <TextView
            android:id="@+id/tvAnimalName"
            android:layout_
            android:layout_
            android:weight="1"
            android:gravity="start"
            android:layout_marginStart="8dp"
            android:textSize="20sp" />


        <TextView
            android:id="@+id/tvPersonName"
             android:layout_
            android:layout_
            android:weight="1"
            android:gravity="end"
            android:layout_marginEnd="8dp"
            android:textSize="20sp" />

    </LinearLayout>

and you can have two columns as mentioned in the question 

【讨论】：

非常感谢。但是人和动物的名字在同一列。我想动物会在第一列，人会在第二列。

您的意思是您正在为视图持有者询问布局。如果是这样，你应该粘贴布局

我该怎么做？

你可以粘贴适配器的 xml 布局，以便我可以看到并告诉如何做到这一点@Sergey

我编辑了我的答案@Sergey。请看一看。让我知道它的工作与否