四则运算项目

package com.example.szys;

import android.media.AudioManager;

import android.os.Bundle;
import android.os.SystemClock;
import android.app.Activity;
import android.view.Menu;

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;

import java.text.DecimalFormat;

import android.support.v4.app.Fragment;
import android.text.InputType;
import android.os.Bundle;
import android.view.ContextMenu;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.os.Build;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.ContextMenu.ContextMenuInfo;
import android.widget.Button;
import android.widget.Chronometer;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {
private Chronometer timer;

//  AudioManager mAudioManager = (AudioManager)getSystemService(Context.AUDIO_SERVICE);
//     Button bz,bj;
int x;//题目个数
int y=0;
int n;
//int time=0;
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();
//String str2 = 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;
// int c = 0;
ooo opt=new ooo();
EditText editText1,editText2,editText3;
StringBuffer text,text1;
String number_1="",number_2="";
boolean clicked=false;
byte style=0;
Button button1,button2,button3,button4,button5,button6,button7,button8,button9,button10;
Button button11,button12,button13,button14,button15;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
//time++;
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
text=new StringBuffer();
editText1=(EditText)findViewById(R.id.editText2);
editText2=(EditText)findViewById(R.id.editText1);
//      editText3=(EditText)findViewById(R.id.editText3);
timer=(Chronometer)this.findViewById(R.id.chronometer1);
/*  bz=(Button)findViewById(R.id.button15);
bj=(Button)findViewById(R.id.button16);*/
/*  bz.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
mAudioManager.adjustStreamVolume(AudioManager.STREAM_MUSIC,AudioManager.ADJUST_LOWER,
AudioManager.FX_FOCUS_NAVIGATION_UP);

}
});*/
/* bj.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
mAudioManager.adjustStreamVolume(AudioManager.STREAM_MUSIC,AudioManager.ADJUST_RAISE,
AudioManager.FX_FOCUS_NAVIGATION_UP);

}
});*/
//editText.setFocusable(false);
button9=(Button) findViewById(R.id.button9);
button9.setOnClickListener(new Button.OnClickListener(){

public void onClick(View v) {
// TODO Auto-generated method stub
if(clicked){
editText1.setText("");
clicked=false;
text.setLength(0);
}
text.append("7");
editText1.setText(text.toString());

}

});
button10=(Button) findViewById(R.id.button10);
button10.setOnClickListener(new Button.OnClickListener(){

public void onClick(View v) {
// TODO Auto-generated method stub
if(clicked){
editText1.setText("");
clicked=false;
text.setLength(0);
}
text.append("8");
editText1.setText(text.toString());
}
});
button11=(Button) findViewById(R.id.button11);
button11.setOnClickListener(new Button.OnClickListener(){

public void onClick(View v) {
// TODO Auto-generated method stub
if(clicked){
editText1.setText("");
clicked=false;
text.setLength(0);
}
text.append("9");
editText1.setText(text.toString());
}

});
button6=(Button) findViewById(R.id.button6);
button6.setOnClickListener(new Button.OnClickListener(){

public void onClick(View v) {
// TODO Auto-generated method stub
if(clicked){
editText1.setText("");
clicked=false;
text.setLength(0);
}
text.append("4");
editText1.setText(text.toString());
}

});
button7=(Button) findViewById(R.id.button7);
button7.setOnClickListener(new Button.OnClickListener(){

public void onClick(View v) {
// TODO Auto-generated method stub
if(clicked){
editText1.setText("");
clicked=false;
text.setLength(0);
}
text.append("5");
editText1.setText(text.toString());
}

});
button8=(Button) findViewById(R.id.button8);
button8.setOnClickListener(new Button.OnClickListener(){

public void onClick(View v) {
// TODO Auto-generated method stub
if(clicked){
editText1.setText("");
clicked=false;
text.setLength(0);
}
text.append("6");
editText1.setText(text.toString());
}

});
button3=(Button) findViewById(R.id.button3);
button3.setOnClickListener(new Button.OnClickListener(){

public void onClick(View v) {
// TODO Auto-generated method stub
if(clicked){
editText1.setText("");
clicked=false;
text.setLength(0);
}
text.append("1");
editText1.setText(text.toString());
}

});
button4=(Button) findViewById(R.id.button4);
button4.setOnClickListener(new Button.OnClickListener(){

public void onClick(View v) {
// TODO Auto-generated method stub
if(clicked){
editText1.setText("");
clicked=false;
text.setLength(0);
}
text.append("2");
editText1.setText(text.toString());
}

});
button5=(Button) findViewById(R.id.button5);
button5.setOnClickListener(new Button.OnClickListener(){

public void onClick(View v) {
// TODO Auto-generated method stub
if(clicked){
editText1.setText("");
clicked=false;
text.setLength(0);
}
text.append("3");
editText1.setText(text.toString());
}

});
button2=(Button) findViewById(R.id.button2);
button2.setOnClickListener(new Button.OnClickListener(){

public void onClick(View v) {
// TODO Auto-generated method stub
if(clicked){
editText1.setText("");
clicked=false;
text.setLength(0);
}
text.append("0");
editText1.setText(text.toString());
}

});
button12=(Button) findViewById(R.id.button12);
button12.setOnClickListener(new Button.OnClickListener(){

public void onClick(View v) {
// TODO Auto-generated method stub
if(clicked){
editText1.setText("");
clicked=false;
text.setLength(0);
}
if(editText1.getText().toString().indexOf(".")==-1){//已经有.了
if(text.length()==0){
text.append("0.");
}else{
text.append(".");
}
editText1.setText(text.toString());
}
}

});
button13=(Button) findViewById(R.id.button13);
button13.setOnClickListener(new Button.OnClickListener(){

public void onClick(View v) {
// TODO Auto-generated method stub
if(b==1)
{
if(editText1.getText().toString().length()!=0)
{
try
{
x=Integer.parseInt(editText1.getText().toString());
if(x>=0 && x<=5)b++;
else Toast.makeText(MainActivity.this, "输入错误", 1).show();
}
catch(NumberFormatException x)
{
Toast.makeText(MainActivity.this, "输入错误", 1).show();
}
}
else Toast.makeText(MainActivity.this, "输入误", 1).show();
editText1.setText("");
number_1="";
number_2="";
style=0;
clicked=false;
text.setLength(0);
}
if(b==2)
{
if(n!=0)anser[i-2]=Float.parseFloat(editText1.getText().toString());
str1="第"+i+"条题目为:\n";
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]);
editText2.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]);
editText2.setText(str1+str);
}
if(i==x+1)
{
b=3;
anser[i-2]=Float.parseFloat(editText1.getText().toString());
}
else i++;
editText1.setText("");
number_1="";
number_2="";
style=0;
clicked=false;
text.setLength(0);
}
if(b==3)
{
y=0;
for(int j=0;j<x;j++)
{
if(anser[j]==trueanser[j])y++;
}
timer.stop();
editText2.setText("答题完成了，谢谢您的参与!"+"\n"+"恭喜您！答对了"+y+"道!");
b=0;
editText1.setText("");
number_1="";
number_2="";
style=0;
clicked=false;
text.setLength(0);
}
}
});
button1=(Button) findViewById(R.id.button1);
button1.setOnClickListener(new Button.OnClickListener(){

public void onClick(View v) {
// TODO Auto-generated method stub
editText2.setText("请输入题量!（5以内）");
n=0;
i=1;
b=1;
timer.setBase(SystemClock.elapsedRealtime());
timer.start();
startService(new Intent(MainActivity.this, MusicService.class));                }
});
button14=(Button) findViewById(R.id.button14);
button14.setOnClickListener(new Button.OnClickListener(){

public void onClick(View v) {
// TODO Auto-generated method stub
editText1.setText("");
number_1="";
number_2="";
style=0;
clicked=false;
text.setLength(0);
}
});
//      button15=(Button) findViewById(R.id.button15);
//         button15.setOnClickListener(new Button.OnClickListener(){

//      public void onClick(View v) {
// TODO Auto-generated method stub
//for(time = 0; time < 10000; time++){
//            editText3.setText("");
//        str2="待定";//+time+"s";
//        editText3.setText(str2);
//System.out.println("读取：" + i);
//  }

//        }
//   });

}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// TODO Auto-generated method stub
switch (item.getItemId()) {
case R.id.help:
Intent intent1=new Intent(this,Hellp.class);
startActivity(intent1);
break;
case R.id.about:
Intent intent2=new Intent(this,About.class);
startActivity(intent2);
break;
default:
break;
}
return super.onOptionsItemSelected(item);
}

@Override
public void onCreateContextMenu(ContextMenu menu, View v,
ContextMenuInfo menuInfo) {
// TODO Auto-generated method stub
super.onCreateContextMenu(menu, v, menuInfo);
if(v.getId()==R.id.chronometer1){
this.getMenuInflater().inflate(R.menu.context, menu);
menu.setHeaderIcon(R.drawable.ic_launcher);
menu.setHeaderTitle("计时器选项");
}

}
@Override
public boolean onContextItemSelected(MenuItem item) {
// TODO Auto-generated method stub
switch (item.getItemId()) {
case R.id.item1:
timer.setBase(SystemClock.elapsedRealtime());
timer.start();
break;
case R.id.item2:

timer.stop();
break;
case R.id.item3:
timer.setBase(SystemClock.elapsedRealtime());
timer.stop();
break;
default:
break;
}
return super.onContextItemSelected(item);
}

}

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.hhhhhh.MainActivity$PlaceholderFragment"
android:background="@drawable/jsqbg"

>

<EditText
android:id="@+id/editText1"
android:layout_width="300dp"
android:layout_height="100dp"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:ems="10" />

<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/editText2"
android:layout_below="@+id/editText2"
android:text="0" />

<Button
android:id="@+id/button3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/editText2"
android:layout_toRightOf="@+id/button2"
android:text="1" />

<Button
android:id="@+id/button4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/button3"
android:layout_alignBottom="@+id/button3"
android:layout_toRightOf="@+id/button3"
android:text="2" />

<Button
android:id="@+id/button5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/button4"
android:layout_alignBottom="@+id/button4"
android:layout_toRightOf="@+id/button4"
android:text="3" />

<Button
android:id="@+id/button6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/button2"
android:layout_below="@+id/button2"
android:text="4" />

<Button
android:id="@+id/button7"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/button6"
android:layout_alignBottom="@+id/button6"
android:layout_toRightOf="@+id/button6"
android:text="5" />

<Button
android:id="@+id/button8"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/button7"
android:layout_alignBottom="@+id/button7"
android:layout_toRightOf="@+id/button7"
android:text="6" />

<Button
android:id="@+id/button9"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/button8"
android:layout_alignBottom="@+id/button8"
android:layout_toRightOf="@+id/button8"
android:text="7" />

<Button
android:id="@+id/button10"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/button6"
android:layout_toLeftOf="@+id/button7"
android:text="8" />

<Button
android:id="@+id/button11"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/button10"
android:layout_alignBottom="@+id/button10"
android:layout_toRightOf="@+id/button10"
android:text="9" />

<Button
android:id="@+id/button12"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/button11"
android:layout_alignBottom="@+id/button11"
android:layout_toRightOf="@+id/button11"
android:text="." />

<Button
android:id="@+id/button13"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/button12"
android:layout_alignBottom="@+id/button12"
android:layout_alignLeft="@+id/button9"
android:text="确定" />

<EditText
android:id="@+id/editText2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/editText1"
android:layout_below="@+id/editText1"
android:ems="10"
android:focusable="false"
android:text="四则运算小程序欢迎您!" />

<Button
android:id="@+id/button14"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/button13"
android:layout_below="@+id/button13"
android:text="清除" />

<!--     <EditText
android:id="@+id/editText3"
android:layout_width="100dp"
android:layout_height="40dp"
android:layout_alignBaseline="@+id/button14"
android:layout_alignBottom="@+id/button14"
android:layout_alignLeft="@+id/button11"
android:layout_marginLeft="14dp"
android:ems="10"
android:inputType="time"
android:text="">

<requestFocus />
</EditText> -->

<!--   <Button
android:id="@+id/button15"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/editText3"
android:layout_alignBottom="@+id/editText3"
android:layout_toLeftOf="@+id/editText3"
android:text="时间" /> -->

<Button
android:id="@+id/button1"
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/button10"
android:layout_alignTop="@+id/button14"
android:text="开始" />

<Chronometer
android:id="@+id/chronometer1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignRight="@+id/button11"
android:layout_below="@+id/button1"
android:layout_marginTop="34dp"
android:text="Chronometer" />

<!-- <Button
android:id="@+id/button15"
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/chronometer1"
android:layout_alignLeft="@+id/button1"
android:text="增大音量" /> -->

<!-- <Button
android:id="@+id/button16"
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignTop="@+id/button15"
android:layout_toRightOf="@+id/button12"
android:text="减小音量" /> -->

</RelativeLayout>

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

<string name="app_name">Szys</string>
<string name="action_settings">Settings</string>

<string name="hello_world">四则运算!</string>
<string name="help">本程序为小学生四则运算出题软件，可以输入题目数量进行答题，最终输出答题情况！谢谢使用！</string>
<string name="about">在数学中，当一级运算（加减）和二级运算（乘除）同时出现在一个式子中时，它们的运算顺序是先乘除，后加减，如果有括号就先算括号内后算括号外，同一级运算顺序是从左到右，这样的运算叫四则运算。
四则是指加法、减法、乘法、除法的计算法则。
一道四则运算的算式并不需要一定有四种运算符号，一般指由两个或两个以上运算符号及括号，把多数合并成一个数的运算。
加减互为逆运算；乘除互为逆运算；乘法是加法的简便运算。
统称为四则运算</string>

</resources>