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">
    <Button
        android:id="@+id/on_click_button"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:text="点击事件"
        android:textColor="@color/black"
        android:textSize="17sp"
        ></Button>
    <Button
        android:id="@+id/btn_click_single"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:text="点击事件"
        android:textColor="@color/black"
        android:textSize="17sp"
        ></Button>
</LinearLayout>

点击事件

package com.example.chapter03;

import androidx.appcompat.app.AppCompatActivity;

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

public class MainActivity extends AppCompatActivity {

    private TextView tv_result;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_text_view);
        tv_result = findViewById(R.id.on_click_button);
        Button btn_click_single = findViewById(R.id.btn_click_single);
        btn_click_single.setOnClickListener(new MyOnClickListener(tv_result));
    }

    static class MyOnClickListener implements View.OnClickListener {
        private final TextView tv_result;

        public MyOnClickListener(TextView tv_result) {
            this.tv_result = tv_result;
        }

        @Override
        public void onClick(View v) {
            String desc = String.format("%s 您点击了按钮：%s", 123, ((Button) v).getText());
            tv_result.setText(desc);
        }
    }
}