经过长时间的编写代码，我们把填空题的功能完善好了，这个阶段按照着我们的步伐进行，
我们在第二阶段把主要的功能写好了，然后第三阶段就是对app的一些其他细节的完善，还
有我们组员对于app的推广了。
填空题部分核心代码如下
package com.example.newapps; import java.math.BigDecimal; import java.text.DecimalFormat; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Random; import java.util.Stack; import java.util.regex.Matcher; import java.util.regex.Pattern; import android.app.Activity; import android.app.AlertDialog; import android.app.AlertDialog.Builder; import android.content.DialogInterface; import android.content.Intent; import android.graphics.Color; import android.media.AudioManager; import android.media.SoundPool; import android.os.Bundle; import android.support.v4.app.Fragment; import android.view.KeyEvent; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.view.Window; import android.view.WindowManager; import android.view.View.OnClickListener; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.Button; import android.widget.EditText; import android.widget.Spinner; import android.widget.TextView; import android.widget.Toast; public class TianKong extends Activity { //private String expressing; private Spinner mySpinner; private int count = 0; private int TrueNum = 0; private int a = 0, b = 0,c=0,d=0,opnum = 0,opnum1=0,opnum2=0; private int TiShu = 0,TrueAnswer = 0; private SoundPool sp; private char op1,op2,op3; private ArrayAdapter<String> adapter; private int Spinner=0; private TextView myTextView; private EditText ed1; private TextView textView3,textView2,textView1,textView4,textView5; private int ready, yes, no; private int op; private Button button1,bt1; String str; private List<String> list = new ArrayList<String>(); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // 无title requestWindowFeature(Window.FEATURE_NO_TITLE); // 全屏 getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); setContentView(R.layout.tiankong); ed1=(EditText)findViewById(R.id.editText1); myTextView = (TextView) findViewById(R.id.textView1); textView3 = (TextView) findViewById(R.id.textView6); textView2 = (TextView) findViewById(R.id.textView3); textView4 = (TextView) this.findViewById(R.id.textView5); textView5 = (TextView) this.findViewById(R.id.textView4); textView1 = (TextView) this.findViewById(R.id.textView1); button1 = (Button) this.findViewById(R.id.button2); bt1 = (Button) this.findViewById(R.id.button1); sp = new SoundPool(10, AudioManager.STREAM_SYSTEM, 5); ready = sp.load(this, R.raw.readygo, 1); yes = sp.load(this, R.raw.yes, 1); no = sp.load(this, R.raw.ohno, 1); textView5.setVisibility(View.INVISIBLE); ed1.setVisibility(View.INVISIBLE); bt1.setVisibility(View.INVISIBLE); list.add("5"); list.add("6"); list.add("7"); list.add("8"); list.add("9"); list.add("10"); Spinner=1; sp(); button1.setOnClickListener(new OnClickListener() { @Override public void onClick(View arg0) { // TODO Auto-generated method stub showtext(); button1.setVisibility(View.INVISIBLE); textView5.setVisibility(View.VISIBLE); textView2.setVisibility(View.VISIBLE); ed1.setVisibility(View.VISIBLE); bt1.setVisibility(View.VISIBLE); sp.play(ready, 1, 1, 0, 0, 1); Spinner=0; sp(); } }); bt1.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View arg0) { // TODO Auto-generated method stub String str1,str2; Double db1,db2=0.0; textView4.setVisibility(View.VISIBLE); str=textView2.getText().toString(); //Operating exp1 = new Operating(str); System.out.println(str); str1=String.valueOf(arithmetic(str)); str2=ed1.getText().toString(); db1=Double.parseDouble(str1); if(str2==null || str2.equalsIgnoreCase("")) { Toast.makeText(TianKong.this, "你没有输入答案，跳到下一题", 1).show(); } else if(str.matches("^[a-zA-Z]*")) { Toast.makeText(TianKong.this, "你输入的格式错误，跳到下一题", 1).show(); } else { db2=Double.parseDouble(str2); } System.out.println(db1); System.out.println(db2); if (db1.equals(db2)) { TrueNum++; textView4.setTextColor(Color.BLUE); textView4.setText("答对了！"); ed1.setText(""); sp.play(yes, 1, 1, 0, 0, 1); } else { textView4.setTextColor(Color.RED); textView4.setText("答错了！正确答案是："+db1); Toast.makeText(TianKong.this, "上一道题的题目为"+str, Toast.LENGTH_LONG).show(); ed1.setText(""); sp.play(no, 1, 1, 0, 0, 1); } showtext(); } }); } @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) { // Handle action bar item clicks here. The action bar will // automatically handle clicks on the Home/Up button, so long // as you specify a parent activity in AndroidManifest.xml. int id = item.getItemId(); if (id == R.id.action_settings) { return true; } return super.onOptionsItemSelected(item); } @Override public boolean onKeyDown(int keyCode,KeyEvent event) { if(keyCode==KeyEvent.KEYCODE_BACK&& event.getRepeatCount()==0) { dialog(); return true; } return true; } protected void dialog() { AlertDialog.Builder builder=new Builder(TianKong.this); builder.setMessage("确定要退出吗？"); builder.setTitle("提示"); builder.setPositiveButton("确认", new android.content.DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // TODO Auto-generated method stub dialog.dismiss(); android.os.Process.killProcess(android.os.Process.myPid()); } }); builder.setNegativeButton("取消", new android.content.DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // TODO Auto-generated method stub dialog.dismiss(); } }); builder.create().show(); } public static class PlaceholderFragment extends Fragment { public PlaceholderFragment() { } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.tiankong, container, false); return rootView; } } void sp() { mySpinner = (Spinner) findViewById(R.id.spinner1); adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, list); adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); mySpinner.setAdapter(adapter); mySpinner.setSelection(2); mySpinner.setOnItemSelectedListener(new Spinner.OnItemSelectedListener() { public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3) { // TODO Auto-generated method stub /* 将mySpinner 显示 */ if(Spinner==1) { TiShu = Integer.parseInt(adapter.getItem(arg2) .toString().trim()); arg0.setVisibility(View.VISIBLE); } else { textView3.setVisibility(View.INVISIBLE); arg0.setVisibility(View.INVISIBLE); } } public void onNothingSelected(AdapterView<?> arg0) { // TODO Auto-generated method stub myTextView.setText("NONE"); arg0.setVisibility(View.VISIBLE); } }); } void showtext() { int e = 0, f = 0, chioce = 0; int temp = 0; if (count == TiShu && TrueNum==TiShu) { new AlertDialog.Builder(this).setTitle("结果:").setMessage("恭喜你的答案全对了，继续努力哦！") .setPositiveButton("确定", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { button1.setVisibility(View.VISIBLE); count=0; TrueNum=0; textView4.setText(""); textView1.setVisibility(View.VISIBLE); textView3.setVisibility(View.VISIBLE); textView4.setVisibility(View.INVISIBLE); textView2.setVisibility(View.INVISIBLE); button1.setVisibility(View.VISIBLE); textView5.setVisibility(View.INVISIBLE); ed1.setVisibility(View.INVISIBLE); bt1.setVisibility(View.INVISIBLE); Spinner=1; sp(); }}) .show(); } else if(count == TiShu && TrueNum!=TiShu) { new AlertDialog.Builder(this).setTitle("结果").setMessage("你在"+TiShu+"题中答对了"+TrueNum+"题！请重新答题！") .setPositiveButton("确定", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { button1.setVisibility(View.VISIBLE); count=0; TrueNum=0; textView4.setText(""); textView1.setVisibility(View.VISIBLE); textView3.setVisibility(View.VISIBLE); textView4.setVisibility(View.INVISIBLE); textView2.setVisibility(View.INVISIBLE); button1.setVisibility(View.VISIBLE); textView5.setVisibility(View.INVISIBLE); ed1.setVisibility(View.INVISIBLE); bt1.setVisibility(View.INVISIBLE); Spinner=1; sp(); }}) .show(); } else { Random ra = new Random(); a = ra.nextInt(20) + 20; b = ra.nextInt(20) + 20; c = ra.nextInt(20) + 20; d = ra.nextInt(20) + 20; op = Math.abs(ra.nextInt()) % 5 + 1; opnum = Math.abs(ra.nextInt()) % 4 + 1; opnum1 = Math.abs(ra.nextInt()) % 4 + 1; opnum2 = Math.abs(ra.nextInt()) % 4 + 1; switch (opnum) { case 1: op1 = '+'; break; case 2: op1 = '-'; break; case 3: op1 = '*'; break; case 4: op1 = '/'; break; } switch (opnum1) { case 1: op2 = '+'; break; case 2: op2 = '-'; break; case 3: op2 = '*'; break; case 4: op2 = '/'; break; } switch (opnum2) { case 1: op3 = '+'; break; case 2: op3 = '-'; break; case 3: op3 = '*'; break; case 4: op3 = '/'; break; } switch (op) { case 1: textView2.setText("("+a+""+op1+""+b+")"+op2+""+c+""+op3+""+d); break; case 2: textView2.setText("("+a+""+op1+""+b+""+op2+""+c+")"+op3+""+d); break; case 3: textView2.setText(a+""+op1+"("+b+""+op2+""+c+")"+op3+""+d); break; case 4: textView2.setText(a+""+op1+"("+b+""+op2+""+c+""+op3+""+d+")"); break; case 5: textView2.setText(a+""+op1+""+b+""+op2+"("+c+""+op3+""+d+")"); break; } count++; } } public static String parseExp(String expression){ //String numberReg="^((?!0)\d+(\.\d+(?<!0))?)|(0\.\d+(?<!0))$"; expression=expression.replaceAll("\s+", "").replaceAll("^\((.+)\)$", "$1"); String checkExp="\d"; Double db11; String minExp="^((\d+(\.\d+)?)|(\[\-\d+(\.\d+)?\]))[\+\-\*\/]((\d+(\.\d+)?)|(\[\-\d+(\.\d+)?\]))$"; //最小表达式计算 if(expression.matches(minExp)){ String result=calculate(expression); System.out.println("+"+result); return Double.parseDouble(result)>=0?result:"["+result+"]"; } //计算不带括号的四则运算 String noParentheses="^[^\(\)]+$"; String priorOperatorExp="(((\d+(\.\d+)?)|(\[\-\d+(\.\d+)?\]))[\*\/]((\d+(\.\d+)?)|(\[\-\d+(\.\d+)?\])))"; String operatorExp="(((\d+(\.\d+)?)|(\[\-\d+(\.\d+)?\]))[\+\-]((\d+(\.\d+)?)|(\[\-\d+(\.\d+)?\])))"; if(expression.matches(noParentheses)){ Pattern patt=Pattern.compile(priorOperatorExp); Matcher mat=patt.matcher(expression); if(mat.find()){ String tempMinExp=mat.group(); expression=expression.replaceFirst(priorOperatorExp, parseExp(tempMinExp)); }else{ patt=Pattern.compile(operatorExp); mat=patt.matcher(expression); if(mat.find()){ String tempMinExp=mat.group(); expression=expression.replaceFirst(operatorExp, parseExp(tempMinExp)); } } return parseExp(expression); } //计算带括号的四则运算 String minParentheses="\([^\(\)]+\)"; Pattern patt=Pattern.compile(minParentheses); Matcher mat=patt.matcher(expression); if(mat.find()){ String tempMinExp=mat.group(); expression=expression.replaceFirst(minParentheses, parseExp(tempMinExp)); } return parseExp(expression); } public static double arithmetic(String exp){ String result1 = parseExp(exp).replaceAll("[\[\]]", ""); Double db11=Double.parseDouble(result1); DecimalFormat df=new DecimalFormat("######0.00"); String result=String.valueOf(df.format(db11)); return Double.parseDouble(result); } public static String calculate(String exp){ exp=exp.replaceAll("[\[\]]", ""); String number[]=exp.replaceFirst("(\d)[\+\-\*\/]", "$1,").split(","); BigDecimal number1=new BigDecimal(number[0]); BigDecimal number2=new BigDecimal(number[1]); BigDecimal number3=new BigDecimal("0"); BigDecimal result=null; String operator=exp.replaceFirst("^.*\d([\+\-\*\/]).+$", "$1"); if("+".equals(operator)){ result=number1.add(number2); }else if("-".equals(operator)){ result=number1.subtract(number2); }else if("*".equals(operator)){ result=number1.multiply(number2); }else if("/".equals(operator)){ try { result=number1.divide(number2,5,BigDecimal.ROUND_HALF_UP); }catch(ArithmeticException e) { result=number3; } } return result!=null?result.toString():null; } }
我们团队的Github地址：https://github.com/yuhancheng
燃尽图如下：
