小学四则运算APP 第一个冲刺 第二天

团队成员：陈淑筠、杨家安、陈曦

团队选题：小学四则运算APP

第一次冲刺阶段时间：11.17~11.27

本次程序是为了解决上次判断的问题，但是还是出现新的问题页面无法调整，需要进行改进

本次改进代码为：

import java.util.Random;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

public class CalculatorActivity extends Activity {
	private final Random num1=new Random();
	private final Random num2=new Random();
	private final Random r = new Random();
	private char[] ch = {'+','-','*','/'}; //字符数组
	private int index = r.nextInt(ch.length); //随机数，小于数组的长度数, 0~3
	private char a=ch[index];
	private TextView text1,text2,text3;
	private EditText answer;
	private Button surebutton;//确定按钮
	private String c;
	private String e;
	private String b;
	private int i1,i2,i3;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_calculator);
		text1=(TextView)findViewById(R.id.textView1);//随机数字
		text2=(TextView)findViewById(R.id.textView2);//运算符号
		text3=(TextView)findViewById(R.id.textView3);//随机数字
		answer=(EditText)findViewById(R.id.editText1);//运算结果
		b=answer.getText().toString();//获取输入的数值
		i1=Integer.valueOf(b);
		c=String.valueOf(num1.nextInt(100));
		i1=Integer.valueOf(c);
		String d=String.valueOf(a);
		e=String.valueOf(num2.nextInt(100));
		i3=Integer.valueOf(e);
		text1.setText(c);//随机数1-100
		text2.setText(d);//随机运算符+,-,*,/
		text3.setText(e);//随机数1-100
		surebutton=(Button)findViewById(R.id.surebutton);//确定按钮
		surebutton.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View arg0) {
				// TODO Auto-generated method stub
				switch(index){
				case 0:
				{
					if(i1==i2+i3)
						Toast.makeText(CalculatorActivity.this, "正确"+b, Toast.LENGTH_SHORT).show();
					else
						Toast.makeText(CalculatorActivity.this, "错误"+b, Toast.LENGTH_SHORT).show();
					break;
				}
				case 1:
				{
					if(i1==i2-i3)
						Toast.makeText(CalculatorActivity.this, "正确"+b, Toast.LENGTH_SHORT).show();
					else
						Toast.makeText(CalculatorActivity.this, "错误"+b, Toast.LENGTH_SHORT).show();
					break;
				}
				case 2:{
					if(i1==i2*i3)
						Toast.makeText(CalculatorActivity.this, "正确"+b, Toast.LENGTH_SHORT).show();
					else
						Toast.makeText(CalculatorActivity.this, "错误"+b, Toast.LENGTH_SHORT).show();
					break;		
				}
				case 3:
				{
					if(i3!=0){
					if(i1==(i2/i3))
						Toast.makeText(CalculatorActivity.this, "正确"+b, Toast.LENGTH_SHORT).show();
					else
						Toast.makeText(CalculatorActivity.this, "错误"+b, Toast.LENGTH_SHORT).show();
					}
					break;
				}
				}
			}
		});
		
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.calculator, menu);
		return true;
	}

}

 

 失败截图，正在努力改进中！