[Android]实验2.1 用户界面

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文章目录

• 运行图
• 代码

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一、运行图 

运行效果：

 

二、代码

MainActivity.java  代码如下（示例）： 

package com.example.myapplication;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.EditText;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.Spinner;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {
    private EditText edit;
    private RadioGroup genderGroup;
    private RadioButton male,female;
    private String info="",sex="",major="",hobby="";
    private Button btn1,btn2;
    private Spinner spinner;
    private List<String> majorlist;
    private CheckBox hobby1,hobby2,hobby3,hobby4;
    private Toast toast;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        edit=findViewById(R.id.edit);
        genderGroup=findViewById(R.id.genderGroup);
        male=findViewById(R.id.male);
        female=findViewById(R.id.female);
        spinner=findViewById(R.id.spinner);
        hobby1=findViewById(R.id.hobby1);
        hobby2=findViewById(R.id.hobby2);
        hobby3=findViewById(R.id.hobby3);
        hobby4=findViewById(R.id.hobby4);

        btn1=findViewById