RecyclerView的item点击事件

原创

mb613739c94fb76 2021-09-16 11:37:33 博主文章分类：android 学习 ©著作权

文章标签 android ide xml java 控件 文章分类 Android 移动开发

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说明：

亲测可运行，非常方便，返回item每个控件id和每个item的位置position

（1）主界面

package com.example.myapplication19;

import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

import java.util.ArrayList;
import java.util.List;
import java.util.Observer;

public class MainActivity extends AppCompatActivity implements ILanguageRecycleListener {
    private LanguageRecycleAdapter languageRecycleAdapter;
    private RecyclerView rvLanguage;
    private List<String> languageList = new ArrayList<>();
    private EditText editText;
    private Button btn_main;


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

        languageList.add("java");
        languageList.add("kotlin");
        languageList.add("ruby");
        languageList.add("flutter");

        rvLanguage = findViewById(R.id.rvLanguage);
        editText= findViewById(R.id.etLanguage);
        btn_main= findViewById(R.id.btn_main);

        RecyclerView.LayoutManager layoutManager = new
                LinearLayoutManager(this);
        rvLanguage.setLayoutManager(layoutManager);
        languageRecycleAdapter = new LanguageRecycleAdapter(languageList, this);
        rvLanguage.setAdapter(languageRecycleAdapter);

        btn_main.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                String etString = editText.getText().toString();
                languageList.add(etString);
                languageRecycleAdapter.setData(languageList);
                languageRecycleAdapter.notifyDataSetChanged();
            }
        });
    }

    @Override
    public void itemOnClick(int title, int position) {
        Log.e("TAG", "itemOnClick: " + title + ", " + position);
        if (title==103){
            languageList.remove(position);
            languageRecycleAdapter.setData(languageList);
            languageRecycleAdapter.notifyDataSetChanged();
        }
    }
}

（2）item控件管理

package com.example.myapplication19;

import android.view.View;
import android.widget.Button;
import android.widget.TextView;

import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;

public class LanguageViewHolder extends RecyclerView.ViewHolder {
    TextView orderNumber;
    TextView language;
    Button btnDelete;

    public LanguageViewHolder(@NonNull View itemView) {
        super(itemView);
        orderNumber = itemView.findViewById(R.id.tvOrderNumber);
        language = itemView.findViewById(R.id.tvLanguage);
        btnDelete = itemView.findViewById(R.id.btnDelete);
    }
}

（3）适配器

package com.example.myapplication19;

import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;

import java.util.ArrayList;
import java.util.List;

public class LanguageRecycleAdapter extends RecyclerView.Adapter<LanguageViewHolder> {

    private List<String> languageList = new ArrayList<>();

    private ILanguageRecycleListener listener;

    public LanguageRecycleAdapter(List<String> languageList, ILanguageRecycleListener listener) {
        this.languageList = languageList;
        this.listener = listener;

        Log.e("TAG", "LanguageRecycleAdapter " + languageList.size());
    }

    public void setData(List<String> languageList2) {
        this.languageList = languageList2;
    }

    @NonNull
    @Override
    public LanguageViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        LanguageViewHolder holder;
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item, parent, false);
        holder = new LanguageViewHolder(view);
        return holder;

    }

    @Override
    public void onBindViewHolder(@NonNull LanguageViewHolder holder, final int position) {
        holder.orderNumber.setText(String.valueOf(position));
        holder.language.setText(languageList.get(position));
        holder.btnDelete.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                listener.itemOnClick(103,position);
            }
        });
        holder.orderNumber.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                listener.itemOnClick(101,position);
            }
        });

        holder.language.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                listener.itemOnClick(102,position);
            }
        });
    }

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


}

（4）接口

package com.example.myapplication19;

public interface ILanguageRecycleListener {
    void itemOnClick(int title,int position);
}

（5）主界面布局

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

    <LinearLayout
        android:id="@+id/linearLayout2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center_vertical"
        android:orientation="horizontal">


        <EditText
            android:id="@+id/etLanguage"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:paddingRight="8dp" />


        <Button
            android:id="@+id/btn_main"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="3"
            android:backgroundTint="@android:color/holo_purple"
            android:text="Add"
            android:textColor="@android:color/white" />
    </LinearLayout>

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/rvLanguage"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:listitem="@layout/item" />

</LinearLayout>

（6）item

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginBottom="16dp"
    android:gravity="center_vertical"
    android:orientation="horizontal">

    <TextView
        android:id="@+id/tvOrderNumber"
        android:layout_width="100dp"
        android:layout_height="wrap_content"
        android:layout_marginEnd="16dp"
        android:text="1"
        android:textColor="@color/white"
        android:background="@color/colorPrimaryDark"
        app:layout_constraintBottom_toBottomOf="@+id/tvLanguage"
        app:layout_constraintEnd_toStartOf="@+id/tvLanguage"
        app:layout_constraintHorizontal_bias="0.0"
        app:layout_constraintHorizontal_chainStyle="spread_inside"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="@+id/tvLanguage" />

    <TextView
        android:id="@+id/tvLanguage"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:text="Bahasa"
        android:textColor="@color/white"
        android:background="@color/colorAccent"
        app:layout_constraintBottom_toBottomOf="@+id/btnDelete"
        app:layout_constraintEnd_toStartOf="@+id/btnDelete"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toEndOf="@+id/tvOrderNumber"
        app:layout_constraintTop_toTopOf="@+id/btnDelete" />

    <Button
        android:id="@+id/btnDelete"
        android:layout_width="50dp"
        android:layout_height="wrap_content"
        android:text="X"
        android:backgroundTint="@android:color/holo_blue_dark"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toEndOf="@+id/tvLanguage"
        app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>