<?xml version="1.0" encoding="utf-8"?>

 
 
 
 
 
 
 
 
 
 
 
  
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 zuoye06_231
 年11月5日，Google发布安卓系统（答：2007）
 Android操作系统是（答：开源的）
 Android Studio 开发Android程序，还需安装：（1、3）
 Android是基于？平台手机的操作系统（Linux）
 提交

<?xml version="1.0" encoding="utf-8"?>

 
  Windows
  Linux
  Mac
 

package com.example.lenovo.zuoye06_231;
 
import androidx.appcompat.app.AppCompatActivity;
 
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.CompoundButton;
 
 
public class MainActivity extends AppCompatActivity {
 static int i = 0,cb_num = 0;
 boolean rd_num = false,sp_num = false,et_num = false;
 TextView sorce;
 TextView et_on;
 RadioGroup rd;
 Button button;
 CheckBox checkBox1;
 CheckBox checkBox2;
 CheckBox checkBox3;
 
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
 
  //定义
  et_on = findViewById(R.id.et_on);
  sorce = findViewById(R.id.sorce);
  rd = findViewById(R.id.radioGroup);
  button = findViewById(R.id.button);
  checkBox1 = findViewById(R.id.cb1);
  checkBox2 = findViewById(R.id.cb2);
  checkBox3 = findViewById(R.id.cb3);
 
  //为每个复选按钮设置状态改变监听器
  checkBox1.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener(){
   @Override
   public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
    // TODO Auto-generated method stub
    if(isChecked) cb_num++;
    else cb_num--;
   }
  });
  checkBox2.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener(){
   @Override
   public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
    // TODO Auto-generated method stub
    if(isChecked) cb_num--;
    else cb_num++;
   }
  });
  checkBox3.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener(){
   @Override
   public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
    // TODO Auto-generated method stub
    if(isChecked) cb_num++;
    else cb_num--;
   }
  });
 
  //设置单选按钮组添加事件监听
  rd.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
 
   @Override
   public void onCheckedChanged(RadioGroup group, int checkedId) {
    //获取被选择的单选按钮
    RadioButton r = (RadioButton) findViewById(checkedId);
    if(r.getText().equals("开源的")) rd_num = true;
    else rd_num = false;
   }
  });
 
  //edittext监听
  et_on.setOnEditorActionListener(new TextView.OnEditorActionListener() {
   @Override
   public boolean onEditorAction(TextView textView, int i, KeyEvent keyEvent) {
    if(et_on.getText().toString().equals("2007")) et_num = true;
    else et_num = false;
    return false;
   }
  });
 
  //获取下拉列表对象
  final Spinner spinner = (Spinner) findViewById(R.id.spinner);
  //为Spinner添加选择监听器
  spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
   @Override
   //数据选择事件处理
   public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) {
    String[] Systems = getResources().getStringArray(R.array.Systems);
    //显示选择结果
    if(Systems[pos].equals("Linux")) sp_num = true;
    else sp_num = false;
   }
   //以下方法重写必须有
   @Override
   public void onNothingSelected(AdapterView<?> parent) {
    // Another interface callback
   }
  });
 
  button.setOnClickListener(new View.OnClickListener() {
   @Override
   public void onClick(View v) {
    if(cb_num == 2) i++;
    if(sp_num) i++;
    if(et_num) i++;
    if(rd_num) i++;
    sorce.setText("   "+(i*25)+"   ");
    if(i == 4)
     Toast.makeText(MainActivity.this,"你真棒！祝贺你！", Toast.LENGTH_SHORT).show();
    else if(i == 3)
     Toast.makeText(MainActivity.this,"祝贺你通过考试！", Toast.LENGTH_SHORT).show();
    else
     Toast.makeText(MainActivity.this,"还需努力啊！", Toast.LENGTH_SHORT).show();
   }
  });
 }
}