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>