Android Studio Button按钮点击事件

XML文件：

<?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="com.example.administrator.myapplication.MainActivity">

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/btn_click"
        android:text="点击"/>

</android.support.constraint.ConstraintLayout>

JAVA文件

package com.example.administrator.myapplication;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity{

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

        /*
        按钮Button
         */
        Button btn_click = (Button)findViewById(R.id.btn_click);
        //点击事件
        btn_click.setOnClickListener(new MyOnClickListener());
        //长按事件    
        btn_click.setOnLongClickListener(new MyOnLongClickListener());
    }
 private class MyOnClickListener implements View.OnClickListener {
        @Override
        public void onClick(View v) {
            if (v.getId()==R.id.btn_click){
                Toast.makeText(MainActivity.this, "您点击了控件："+((TextView)v).getText(), Toast.LENGTH_SHORT).show();
            }
        }
    }
       /*
        按钮Button控制器
         */
    private class MyOnLongClickListener implements View.OnLongClickListener {
        @Override
        public boolean onLongClick(View v) {
            if (v.getId()==R.id.btn_click){
                Toast.makeText(MainActivity.this, "您长按了控件："+((TextView)v).getText(), Toast.LENGTH_SHORT).show();
            }
            return false;
        }
    }
}