// ===================== 文件：MainActivity.java =====================
package com.example.eventdemo;

import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

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

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

/**
 * Android 常用事件監(jiān)聽(tīng)示例
 * 展示：點(diǎn)擊、長(zhǎng)按、觸摸、文本變化、列表點(diǎn)擊
 */
public class MainActivity extends AppCompatActivity {

    private Button btnClick, btnLongPress, btnTouch;
    private EditText editText;
    private RecyclerView recyclerView;
    private List<String> dataList = new ArrayList<>();
    private MyAdapter adapter;

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

        btnClick = findViewById(R.id.btnClick);
        btnLongPress = findViewById(R.id.btnLongPress);
        btnTouch = findViewById(R.id.btnTouch);
        editText = findViewById(R.id.editText);
        recyclerView = findViewById(R.id.recyclerView);

        // ------------------ 1. 點(diǎn)擊事件 ------------------
        btnClick.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Toast.makeText(MainActivity.this, "按鈕被點(diǎn)擊", Toast.LENGTH_SHORT).show();
            }
        });

        // ------------------ 2. 長(zhǎng)按事件 ------------------
        btnLongPress.setOnLongClickListener(new View.OnLongClickListener() {
            @Override
            public boolean onLongClick(View view) {
                Toast.makeText(MainActivity.this, "按鈕被長(zhǎng)按", Toast.LENGTH_SHORT).show();
                return true; // 返回 true 表示事件已消費(fèi)
            }
        });

        // ------------------ 3. 觸摸事件 ------------------
        btnTouch.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                switch (event.getAction()) {
                    case MotionEvent.ACTION_DOWN:
                        Toast.makeText(MainActivity.this, "觸摸按下", Toast.LENGTH_SHORT).show();
                        break;
                    case MotionEvent.ACTION_MOVE:
                        // 可實(shí)現(xiàn)拖拽操作
                        break;
                    case MotionEvent.ACTION_UP:
                        Toast.makeText(MainActivity.this, "觸摸抬起", Toast.LENGTH_SHORT).show();
                        break;
                }
                return true; // 返回 true 表示事件已處理
            }
        });

        // ------------------ 4. 文本變化監(jiān)聽(tīng) ------------------
        editText.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
                // 輸入前的回調(diào)，可用于備份數(shù)據(jù)
            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
                // 輸入過(guò)程回調(diào)，可用于搜索建議
            }

            @Override
            public void afterTextChanged(Editable s) {
                // 輸入完成回調(diào)
                Toast.makeText(MainActivity.this, "輸入內(nèi)容: " + s.toString(), Toast.LENGTH_SHORT).show();
            }
        });

        // ------------------ 5. 列表點(diǎn)擊事件 ------------------
        for (int i = 0; i < 20; i++) {
            dataList.add("Item " + i);
        }
        adapter = new MyAdapter(dataList);
        recyclerView.setLayoutManager(new LinearLayoutManager(this));
        recyclerView.setAdapter(adapter);

        adapter.setOnItemClickListener(new MyAdapter.OnItemClickListener() {
            @Override
            public void onItemClick(int position) {
                Toast.makeText(MainActivity.this, "點(diǎn)擊了 " + dataList.get(position), Toast.LENGTH_SHORT).show();
            }
        });
    }
}


// ===================== 文件：MyAdapter.java =====================
package com.example.eventdemo;

import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;
import java.util.List;

/**
 * RecyclerView 適配器示例
 * 支持列表項(xiàng)點(diǎn)擊事件
 */
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {

    private List<String> dataList;
    private OnItemClickListener listener;

    public interface OnItemClickListener {
        void onItemClick(int position);
    }

    public void setOnItemClickListener(OnItemClickListener listener) {
        this.listener = listener;
    }

    public MyAdapter(List<String> dataList) {
        this.dataList = dataList;
    }

    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext())
                .inflate(android.R.layout.simple_list_item_1, parent, false);
        return new ViewHolder(view, listener);
    }

    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        holder.textView.setText(dataList.get(position));
    }

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

    static class ViewHolder extends RecyclerView.ViewHolder {
        TextView textView;

        public ViewHolder(@NonNull View itemView, final OnItemClickListener listener) {
            super(itemView);
            textView = itemView.findViewById(android.R.id.text1);

            itemView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    if (listener != null) {
                        listener.onItemClick(getAdapterPosition());
                    }
                }
            });
        }
    }
}


// ===================== 文件：activity_main.xml =====================
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:padding="16dp">

    <Button
        android:id="@+id/btnClick"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="點(diǎn)擊事件" />

    <Button
        android:id="@+id/btnLongPress"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="長(zhǎng)按事件"
        android:layout_marginTop="10dp"/>

    <Button
        android:id="@+id/btnTouch"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="觸摸事件"
        android:layout_marginTop="10dp"/>

    <EditText
        android:id="@+id/editText"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="文本變化監(jiān)聽(tīng)"
        android:layout_marginTop="10dp"/>

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/recyclerView"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:layout_marginTop="10dp"/>
</LinearLayout>