在原有的基础上做了些许改动以及添加了一点小功能,以下是代码:
package com.example.add; import java.io.File; import com.example.add.opt;
import com.example.add.R; import java.text.DecimalFormat; import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.View;
import android.app.Activity;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast; public class MainActivity extends Activity { MediaPlayer mp;
int x;//题目个数
int y=0;
int n;
int i=1;
char[] op = { '+', '-', '*', '/' };
int[] nov = new int[4];
int zf;//控制正负
int zz;//题型控制
String str = new String();
String str1 = new String();
int[] num1 = new int[5];
String s[] = new String[5];
int num2=0;
float[] anser=new float[5];//用户的答案
float[] trueanser=new float[5];//正确答案
File file;
int a=0;
int b=0;
int bb=0;
long begin=0,end=0,time=0;
String ss;
// int c = 0;
opt opt=new opt();;
EditText editText,xs;
StringBuffer text,text1;
String number_1="",number_2="";
boolean clicked=false;
byte style=0;
Button btn_1,btn_2,btn_3,btn_4,btn_5,btn_6,btn_7,btn_8,btn_9,btn_0;
Button start,btn_eq,btn_dot,btn_clear,btn_m1,btn_m2,btn_m3;
private Button btn_dot1;
/** Called when the activity is first created. */ public void stop(){
mp.reset();
mp=MediaPlayer.create(this, R.raw.unity);
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.fragment_main);
text=new StringBuffer();
editText=(EditText)findViewById(R.id.result);
xs=(EditText)findViewById(R.id.xs);
mp=MediaPlayer.create(this, R.raw.unity);
//editText.setFocusable(false);
btn_1=(Button) findViewById(R.id.btn_1);
btn_1.setOnClickListener(new Button.OnClickListener(){ public void onClick(View v) {
// TODO Auto-generated method stub
if(clicked){
editText.setText("");
clicked=false;
text.setLength(0);
}
text.append("7");
editText.setText(text.toString()); } });
btn_2=(Button) findViewById(R.id.btn_2);
btn_2.setOnClickListener(new Button.OnClickListener(){ public void onClick(View v) {
// TODO Auto-generated method stub
if(clicked){
editText.setText("");
clicked=false;
text.setLength(0);
}
text.append("8");
editText.setText(text.toString());
}
});
btn_3=(Button) findViewById(R.id.btn_3);
btn_3.setOnClickListener(new Button.OnClickListener(){ public void onClick(View v) {
// TODO Auto-generated method stub
if(clicked){
editText.setText("");
clicked=false;
text.setLength(0);
}
text.append("9");
editText.setText(text.toString());
} });
btn_4=(Button) findViewById(R.id.btn_4);
btn_4.setOnClickListener(new Button.OnClickListener(){ public void onClick(View v) {
// TODO Auto-generated method stub
if(clicked){
editText.setText("");
clicked=false;
text.setLength(0);
}
text.append("4");
editText.setText(text.toString());
} });
btn_5=(Button) findViewById(R.id.btn_5);
btn_5.setOnClickListener(new Button.OnClickListener(){ public void onClick(View v) {
// TODO Auto-generated method stub
if(clicked){
editText.setText("");
clicked=false;
text.setLength(0);
}
text.append("5");
editText.setText(text.toString());
} });
btn_6=(Button) findViewById(R.id.btn_6);
btn_6.setOnClickListener(new Button.OnClickListener(){ public void onClick(View v) {
// TODO Auto-generated method stub
if(clicked){
editText.setText("");
clicked=false;
text.setLength(0);
}
text.append("6");
editText.setText(text.toString());
} });
btn_7=(Button) findViewById(R.id.btn_7);
btn_7.setOnClickListener(new Button.OnClickListener(){ public void onClick(View v) {
// TODO Auto-generated method stub
if(clicked){
editText.setText("");
clicked=false;
text.setLength(0);
}
text.append("1");
editText.setText(text.toString());
} });
btn_8=(Button) findViewById(R.id.btn_8);
btn_8.setOnClickListener(new Button.OnClickListener(){ public void onClick(View v) {
// TODO Auto-generated method stub
if(clicked){
editText.setText("");
clicked=false;
text.setLength(0);
}
text.append("2");
editText.setText(text.toString());
} });
btn_9=(Button) findViewById(R.id.btn_9);
btn_9.setOnClickListener(new Button.OnClickListener(){ public void onClick(View v) {
// TODO Auto-generated method stub
if(clicked){
editText.setText("");
clicked=false;
text.setLength(0);
}
text.append("3");
editText.setText(text.toString());
} }); btn_0=(Button) findViewById(R.id.btn_0);
btn_0.setOnClickListener(new Button.OnClickListener(){ public void onClick(View v) {
// TODO Auto-generated method stub
if(clicked){
editText.setText("");
clicked=false;
text.setLength(0);
}
text.append("0");
editText.setText(text.toString());
} }); btn_dot=(Button) findViewById(R.id.btn_dot);
btn_dot.setOnClickListener(new Button.OnClickListener(){ public void onClick(View v) {
// TODO Auto-generated method stub
if(clicked){
editText.setText("");
clicked=false;
text.setLength(0);
}
if(editText.getText().toString().indexOf(".")==-1){//已经有.了
if(text.length()==0){
text.append("0.");
}else{
text.append(".");
}
editText.setText(text.toString());
}
} }); btn_dot1=(Button) findViewById(R.id.btn_10);
btn_dot1.setOnClickListener(new Button.OnClickListener(){ public void onClick(View v) {
// TODO Auto-generated method stub
if(clicked){
editText.setText("");
clicked=false;
text.setLength(0);
}
text.append("-");
editText.setText(text.toString());
} }); btn_m1=(Button) findViewById(R.id.music1);
btn_m1.setOnClickListener(new Button.OnClickListener(){ public void onClick(View v) {
// TODO Auto-generated method stub
mp.start();
}
}); btn_m2=(Button) findViewById(R.id.music2);
btn_m2.setOnClickListener(new Button.OnClickListener(){ public void onClick(View v) {
// TODO Auto-generated method stub
stop();
}
}); btn_m3=(Button) findViewById(R.id.music3);
btn_m3.setOnClickListener(new Button.OnClickListener(){ public void onClick(View v) {
// TODO Auto-generated method stub
mp.pause();
}
}); btn_eq=(Button) findViewById(R.id.btn_eq);
btn_eq.setOnClickListener(new Button.OnClickListener(){ public void onClick(View v) {
// TODO Auto-generated method stub
if(b==1)
{
if(editText.getText().toString().length()!=0)
{
try
{
x=Integer.parseInt(editText.getText().toString());
if(x>=0 && x<=5)b++;
else Toast.makeText(MainActivity.this, "输入有误", 1).show();
}
catch(NumberFormatException x)
{
Toast.makeText(MainActivity.this, "输入有误", 1).show();
}
}
else Toast.makeText(MainActivity.this, "输入有误", 1).show();
editText.setText("");
number_1="";
number_2="";
style=0;
clicked=false;
text.setLength(0);
begin=System.currentTimeMillis();
}
if(b==2)
{
if(n!=0)anser[i-2]=Float.parseFloat(editText.getText().toString());
str1="第"+i+"道题目为:";
n=(int)(Math.random() * 4 + 2);//随机出运算符的数量
zz=(int)(Math.random()*2);
for(int j=0;j<n;j++)
{
//zf=(int)(Math.random()*2);
//if(zf==0)//负
// num1[j]=-(int)(Math.random()*100);//产生随机数
//else //正
num1[j]=(int)(Math.random()*100);
if(zz==1)num1[j]=(int)(Math.random()*10+1);
}
for(int k=0;k<n-1;k++)
{
nov[k]=(int)(Math.random()*4);
if(nov[k]==3&&num1[k+1]==0)
{
do
{
num1[k+1]=(int)(Math.random()*100);
}while(num1[k+1]==0);
}
}
str="";
if(zz==0)
{
for(int j=0;j<n;j++)
{
//if(num1[j]<0)str=str+"("+String.valueOf(num1[j])+")";
str=str+String.valueOf(num1[j]);
if(j==n-1)
{
//try
//{
//int ii=0;
try{
trueanser[i-1]=opt.Math(str);
DecimalFormat df = new DecimalFormat("#.00");
trueanser[i-1]=Float.parseFloat(df.format(trueanser[i-1]));
} catch (Exception e1) {
// TODO 自动生成的 catch 块
e1.printStackTrace();
}
//}
/*catch (Exception e1)
{
System.out.println(e1);
//e1.printStackTrace();
}*/
str=str+"=";
//str=str+String.valueOf(trueanser[i-1]);
xs.setText(str1+str);
break;
}
str=str+op[nov[j]];
}
}
if(zz==1)
{
trueanser[i-1]=1;
str=String.valueOf(num1[0])+"!=";
for(int j=1;j<=num1[0];j++)
trueanser[i-1]=trueanser[i-1]*j;
//str=str+String.valueOf(trueanser[i-1]);
xs.setText(str1+str);
}
if(i==x+1)
{
b=3;
anser[i-2]=Float.parseFloat(editText.getText().toString());
}
else i++;
editText.setText("");
number_1="";
number_2="";
style=0;
clicked=false;
text.setLength(0);
}
if(b==3)
{
ss="";
y=0;
for(int j=0;j<x;j++)
{
if(anser[j]==trueanser[j])y++;
ss=ss+(j+1)+"："+trueanser[j]+";\n";
}
end=System.currentTimeMillis();
time=(end-begin)/1000;
xs.setText("答题完成!答对"+y+"道!\n"+"用时："+time+"s 正确答案:");
editText.setSingleLine(false);
editText.setHorizontallyScrolling(false);
editText.setText(ss); b=0;
number_1="";
number_2="";
style=0;
clicked=false;
text.setLength(0);
}
}
});
start=(Button) findViewById(R.id.start);
start.setOnClickListener(new Button.OnClickListener(){ public void onClick(View v) {
// TODO Auto-generated method stub
xs.setText("请输入出题数量!(1-5)");
n=0;
i=1;
b=1;
}
});
btn_clear=(Button) findViewById(R.id.btn_clear);
btn_clear.setOnClickListener(new Button.OnClickListener(){ public void onClick(View v) {
// TODO Auto-generated method stub
editText.setText("");
number_1="";
number_2="";
style=0;
clicked=false;
text.setLength(0);
}
});
}
}
MainActivity
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:background="@drawable/a1"
> <TextView
android:id="@+id/xs1"
android:layout_width="wrap_content"
android:layout_height="wrap_content" android:singleLine="true"
android:ellipsize="marquee"
android:focusable="true"
android:focusableInTouchMode="true" android:text="欢迎使用四则运算程序 ! ! !"
android:textColor="#ffd700"
android:textSize="28sp" > <requestFocus />
</TextView> <EditText
android:hint="此处显示题目"
android:id="@+id/xs"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ems="20"
android:focusable="false" > <requestFocus />
</EditText> <EditText
android:id="@+id/result"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:cursorVisible="false"
android:digits="1234567890."
android:ems="20"
android:focusable="false"
android:numeric="decimal"
android:singleLine="true" /> <TableLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:stretchColumns="0,1,2,3" > <TableRow> <Button
android:id="@+id/btn_1"
android:text="7" /> <Button
android:id="@+id/btn_2"
android:text="8" /> <Button
android:id="@+id/btn_3"
android:text="9" />
</TableRow> <TableRow> <Button
android:id="@+id/btn_4"
android:text="4" /> <Button
android:id="@+id/btn_5"
android:text="5" /> <Button
android:id="@+id/btn_6"
android:text="6" />
</TableRow> <TableRow> <Button
android:id="@+id/btn_7"
android:text="1" /> <Button
android:id="@+id/btn_8"
android:text="2" /> <Button
android:id="@+id/btn_9"
android:text="3" />
</TableRow> <TableRow> <Button
android:id="@+id/btn_dot"
android:text="." /> <Button
android:id="@+id/btn_0"
android:text="0" /> <Button
android:id="@+id/btn_10"
android:text="-" />
</TableRow>
</TableLayout> <TableLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" > <TableRow
android:id="@+id/tableRow1"
android:layout_width="wrap_content"
android:layout_height="wrap_content" > <Button
android:id="@+id/start"
android:layout_width="105.0dip"
android:layout_height="50.0dip"
android:text="开始" /> <Button
android:id="@+id/btn_eq"
android:layout_width="105.0dip"
android:layout_height="50.0dip"
android:text="确定" /> <Button
android:id="@+id/btn_clear"
android:layout_width="105.0dip"
android:layout_height="50.0dip"
android:text="清除" /> </TableRow> <TableRow
android:id="@+id/tableRow2"
android:layout_width="wrap_content"
android:layout_height="wrap_content" > <TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="" /> </TableRow> <TableRow
android:id="@+id/tableRow3"
android:layout_width="wrap_content"
android:layout_height="wrap_content" > <TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="" /> </TableRow> <TableRow
android:id="@+id/tableRow4"
android:layout_width="wrap_content"
android:layout_height="wrap_content" > <Button
android:id="@+id/music1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="播放" /> <Button
android:id="@+id/music3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="暂停" /> <Button
android:id="@+id/music2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="停止" /> </TableRow>
</TableLayout> </LinearLayout>
fragment_main
package com.example.add;
import java.util.Stack;
public class opt
{
public float Math(String str) throws Exception
{
String[] operater =new String[20];
String[] number = new String[20];
Stack countStack1 = new Stack();
Stack countStack2 = new Stack();
float result =0;
float x=0;
number = str.split("\\/|\\*|\\+|\\-");
operater= str.split("\\d+");
if(number.length<2)throw new Exception("请输入两位计算数以上!");
for(int i = 0; i<number.length;i++)
{
try
{
x=Float.parseFloat(number[i]);
}
catch(NumberFormatException e)
{
throw new Exception("输入错误!请重新输入!");
}
if(operater[i].equals("/"))if(x==0)throw new Exception("除数不能为0!");
countStack1.push(number[i]);
if(i!=number.length-1)
{
if(operater[i+1]!=null)countStack1.push(operater[i+1]);
}
}
while(!countStack1.isEmpty())countStack2.push(countStack1.pop());
String op;
while(!countStack2.isEmpty())
{
result=0;
op=countStack2.pop().toString();
if(op.equals("*"))
{
result=Float.parseFloat(countStack1.pop().toString())*Float.parseFloat(countStack2.pop().toString());
if(number.length==2)return result;
countStack1.push(result);
continue;
}
if(op.equals("/"))
{
result=Float.parseFloat(countStack1.pop().toString())/Float.parseFloat(countStack2.pop().toString());
if(number.length==2)return result;
countStack1.push(result);
continue;
}
countStack1.push(op);
}
while(!countStack1.isEmpty())countStack2.push(countStack1.pop());
while(!countStack2.isEmpty())
{
result=0;
op = countStack2.pop().toString();
if(op.equals("+"))
{
result=Float.parseFloat(countStack1.pop().toString())+Float.parseFloat(countStack2.pop().toString());
countStack1.push(result);
continue;
}
if(op.equals("-"))
{
result=Float.parseFloat(countStack1.pop().toString())-Float.parseFloat(countStack2.pop().toString());
countStack1.push(result);
continue;
}
countStack1.push(op);
}
return result;
}
}
opt
音乐文件就不发啦,只要自行丢一个MP3文件到res/raw里,改名为unity或者到代码里更改文件名都可
PS:送上背景图片~
