版权声明:欢迎转载,有问题劳烦指出 https://blog.csdn.net/qq_33592002/article/details/87077611
1.直接写方法
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.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="match_parent"
tools:context=".MainActivity">
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="148dp"
android:layout_marginLeft="148dp"
android:layout_marginTop="228dp"
android:text="Button"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
android:onClick="click"/>
</android.support.constraint.ConstraintLayout>
package clickme.cgz.com.clickme;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity /*implements OnClickListener */ {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button bt_click = findViewById(R.id.button);
//第二种点击监听的方式,内部类实现OnClickListener接口
// bt_click.setOnClickListener(new myClickListenner());
//第三种点击监听方式,Activity实现onClickListener接口,容易混乱
// bt_click.setOnClickListener(this);
//第四种点击监听方式,匿名内部类,实现
/* bt_click.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
System.out.println("hhh:我被点击了4");
Toast.makeText(MainActivity.this,"hhh:我被点击了4",Toast.LENGTH_SHORT).show();
}
}); */
}
/* class myClickListenner implements OnClickListener{
@Override
public void onClick(View v) {
System.out.println("hhh:我被点击了2");
Toast.makeText(MainActivity.this,"hhh:我被点击了2",Toast.LENGTH_SHORT).show();
}
}
*/
// 第一种点击事件的实现方式,设置onClick属性,click,直接写click方法
public void click(View view) {
System.out.println("hhh:我被点击了");
Toast.makeText(this,"hhh:我被点击了",Toast.LENGTH_SHORT).show();
}
/* @Override
public void onClick(View v) {
System.out.println("hhh:我被点击了3");
Toast.makeText(this,"hhh:我被点击了3",Toast.LENGTH_SHORT).show();
}
*/
}