android:button的三种点击事件写法

一，代码:

xml

<?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:id="@+id/main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".activity.PreferenceActivity">

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="168dp"
        android:layout_marginTop="30dp"
        android:layout_marginEnd="155dp"
        android:layout_marginBottom="653dp"
        android:text="button1"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="174dp"
        android:layout_marginTop="65dp"
        android:layout_marginEnd="149dp"
        android:layout_marginBottom="539dp"
        android:text="button2"
        android:onClick="onButton2Click"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/button1" />

    <Button
        android:id="@+id/button3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="171dp"
        android:layout_marginTop="68dp"
        android:layout_marginEnd="152dp"
        android:layout_marginBottom="422dp"
        android:text="Button3"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/button2" />

</androidx.constraintlayout.widget.ConstraintLayout>

java

package com.example.okdemo1.activity;

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

import androidx.activity.EdgeToEdge;
import androidx.appcompat.app.AppCompatActivity;

import com.example.okdemo1.R;


public class PreferenceActivity extends AppCompatActivity implements View.OnClickListener {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        EdgeToEdge.enable(this);
        setContentView(R.layout.activity_preference);

        //给按钮1增加点击事件
        Button button1 = findViewById(R.id.button1);
        button1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Log.d("button","button1被点击");
            }
        });

        //把按钮3的点击事件绑定到自身
        Button button3 = (Button) findViewById(R.id.button3);
        button3.setOnClickListener(this);
    }

    //button2的点击事件
    public void onButton2Click(View view){
        Log.d("button","button2被点击");
    }

    //button3的点击事件
    @Override
    public void onClick(View v) {
        if (v.getId()==R.id.button3){
            //这里写上按钮点击后需要执行的代码
            Log.d("button","button3被点击");
        } 
    }
}

二，测试效果