4.10

今日总结

学习时间2h致力于android的学习 无法自拔

package com.app.chapter03;

import android.graphics.Color;
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;

public class ButtonEnableActivity extends AppCompatActivity implements View.OnClickListener {

    private Button btn_text;
    private TextView tv_result;

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

      Button btn_enable = findViewById(R.id.btn_enable);
      Button btn_disable = findViewById(R.id.btn_disable);
        tv_result = findViewById(R.id.tv_result);
        Button btn_text = findViewById(R.id.btn_text);

        btn_enable.setOnClickListener(this);
        btn_disable.setOnClickListener(this);
        btn_text.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        Button btn_text = findViewById(R.id.btn_text);
        if (v.getId() == R.id.btn_enable) {
            btn_text.setEnabled(true);
            btn_text.setTextColor(Color.BLACK);
        } else if (v.getId() == R.id.btn_disable) {
            btn_text.setEnabled(false);
            btn_text.setTextColor(Color.GRAY);
        }if(v.getId() == R.id.btn_text){
            String desc =String.format("%s  您点击了按钮： %s", DateUtil.getNowTime(), ((Button)v).getText());
            tv_result.setText(desc);
        }
    }
}