大三下每日打卡009(安卓第三次上课)

 

package com.example.mymvc;

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 textView;
    private Button button;
    private Course course;

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

        textView = (TextView) findViewById(R.id.tvMainInfo);
        button = (Button) findViewById(R.id.bynMainStudy);
        course = new Course();

        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                course.study();
                textView.setText("学习课程的数量"+course.getCount());
            }
        });

    }
}

 效果图