普通UI案例

 

package com.example.testapplication;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;
import android.widget.Toast;

import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;

public class SimpleComponentActivity extends AppCompatActivity {
    // 初始化
    private TextView tv_simeple_message;
    private EditText et_simple_number;
    private Button btn_simple_submit;
    private ImageView iv_simple_icon;

    p