5.28

今日总结

学习时间2h

重在坚持，代码如下

package com.app.chapter03;

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

import androidx.activity.EdgeToEdge;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.graphics.Insets;
import androidx.core.view.ViewCompat;
import androidx.core.view.WindowInsetsCompat;

import com.app.chapter03.utils.DateUtil;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;

public class ButtonStyleActivity extends AppCompatActivity {
    private  TextView tv_result ;
    private Button  timebutton;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        EdgeToEdge.enable(this);
        setContentView(R.layout.activity_button_style);
        /*TextView tv_result = findViewById(R.id.tv_result);//控件初始化*/
        timebutton = findViewById(R.id.timebutton);
        tv_result = findViewById(R.id.tv_result);
        // 设置按钮点击监听器
        timebutton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // 在点击时获取当前时间并显示在 TextView 上
                String currentTime = getCurrentTime();
                String existingText = tv_result.getText().toString();
                tv_result.setText(existingText + "\n" + currentTime);

            }
        });
    }
    private String getCurrentTime() {
        SimpleDateFormat sdf = new SimpleDateFormat("HH:mm:ss", Locale.getDefault());
        return sdf.format(new Date());
    }
}


  /*      Button button =  findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent =new Intent();
                intent

            }
        });

        }
    }

    public void doClick(View view){
String desc =String.format("%s 您点击了按钮： %s", DateUtil.getNowTime(),((Button)view).getText());
    tv_result.setText(desc);
    }


}*/