android计算器源码.doc

这是我本人做的Android 简单计算器源代码。可以实现普通四则运算2,10,16进制转换。常见异常处理，可以实现activity屏幕跳转。算法用逆波兰实现。本项目所有代码不涉及任何知识产权问题，完全由自己学习android时候写的，所以各位可以放心下载。AndroidManifest.xml代码 /layout 代码主代码package my.calu;import java.util.ArrayList;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.EditText;import android.widget.Toast;/package expression;import java.util.ArrayList;import java.util.Stack;import java.util.regex.Matcher;import java.util.regex.Pattern;public class Main extends Activity implements OnClickListener private static final char Str = 0;private Button number0,number1,number2,number3,number4,number5,number6,number7,number8,number9;private Button binary_sign,sexadecimal_sign,clear_sign,point_sign,add_sign,sub_sign,mult_sign,dev_sign,equal_sign;private EditText edittext;private String buffer=;private boolean first_is_number=false , after_equal=false,flage_10zhijing=true,flage_16zhijing=true;/初始化事件public void init() this.edittext=(EditText) findViewById(R.id.editview);this.edittext.setOnClickListener(this);this.number0=(Button) findViewById(R.id.number0);this.number0.setOnClickListener(this);this.number1=(Button) findViewById(R.id.number1);this.number1.setOnClickListener(this);this.number2=(Button) findViewById(R.id.number2);this.number2.setOnClickListener(this);this.number3=(Button) findViewById(R.id.number2);this.number0.setOnClickListener(this);this.number3=(Button) findViewById(R.id.number3);this.number3.setOnClickListener(this);this.number4=(Button) findViewById(R.id.number4);this.number4.setOnClickListener(this);this.number5=(Button) findViewById(R.id.number5);this.number5.setOnClickListener(this);this.number6=(Button) findViewById(R.id.number6);this.number6.setOnClickListener(this);this.number7=(Button) findViewById(R.id.number7);this.number7.setOnClickListener(this);this.number8=(Button) findViewById(R.id.number8);this.number8.setOnClickListener(this);this.number9=(Button) findViewById(R.id.number9);this.number9.setOnClickListener(this);this.point_sign=(Button) findViewById(R.id.point_sign);this.point_sign.setOnClickListener(this);this.equal_sign=(Button) findViewById(R.id.equal_sign);this.equal_sign.setOnClickListener(this);this.add_sign=(Button) findViewById(R.id.add_sign);this.add_sign.setOnClickListener(this);this.sub_sign=(Button) findViewById(R.id.sub_sign);this.sub_sign.setOnClickListener(this);this.mult_sign=(Button) findViewById(R.id.mult_sign);this.mult_sign.setOnClickListener(this);this.dev_sign=(Button) findViewById(R.id.dev_sign);this.dev_sign.setOnClickListener(this);this.clear_sign=(Button) findViewById(R.id.clear_sign);this.clear_sign.setOnClickListener(this);this.binary_sign=(Button) findViewById(R.id.binary_sign);this.binary_sign.setOnClickListener(this);this.sexadecimal_sign=(Button) findViewById(R.id.sexadecimal_sign);this.sexadecimal_sign.setOnClickListener(this);/判断字符串是否为全为0-9的整形数public boolean is10Numeric(String str) Pattern pattern = Ppile(0-9*); Matcher isNum = pattern.matcher(str); if( !isNum.matches() ) return false; return true; /判断字符串是否为全为0-1的整形数public boolean is2Numeric(String str) Pattern pattern = Ppile(0-1*); Matcher isNum = pattern.matcher(str); if( !isNum.matches() ) return false; return true; /判断字符串是否为全为0-f的整形数public boolean is16Numeric(String str) Pattern pattern = Ppile(0-f*); Matcher isNum = pattern.matcher(str); if( !isNum.matches() ) return false; return true; /判断最后一位和第一位是否为数字public boolean isnumber ( String s) int i=s.length();char c=s.charAt(i-1);char k=s.charAt(0);/System.out.println(-firstnumber-+k);/System.out.println(-70c=charAt-+c);if(s.equals(null) return false;if(c = 0 & c =0 & k 后缀表达式SSSssss/ String s = 8-3*5; /中缀 String S = ; /后缀 char Operators = new chars.length(); int Top = -1; for (int i = 0; i = 0) /栈不为空时 char c = OperatorsTop-; /pop Operator if (c = () Operators+Top = c; /push Operator break; else S = S + c; Operators+Top = C; /push Operator S += ; break; case * : /操作符 case / : while (Top = 0) /栈不为空时 char c = OperatorsTop-; /pop Operator if (c = () Operators+Top = c; /push Operator break; else if (c = + | c = -) Operators+Top = c; /push Operator break; else S = S + c; Operators+Top = C; /push Operator S += ; break; case ( : /操作符 Operators+Top = C; S += ; break; case ) : /操作符 while (Top = 0) /栈不为空时 char c = OperatorsTop-; /pop Operator if (c = () break; else S = S + c; S += ; break; default : /操作数 S = S + C; break; while (Top = 0) S = S + OperatorsTop-; /pop Operator / System.out.print(Operators);/ System.out.println(S); /后缀 /后缀表达式计算 double Operands = new doubleS.length();/ System.out.println(S.length(); double x, y, v; Top = - 1; String Operand = ; for (int i = 0; i = 0 & c =1) /buffer= (String )buffer.subSequence(0, len-1);/ else /buffer=;/buffer=;this.edittext.setText(buffer);/-计算结果-else if(v.getId()=this.equal_sign.getId() boolean isnumber;if(buffer.equa