Android实现横屏切换科学计算器

 package com.zjw; import android.app.Activity; import android.content.ClipboardManager; import android.content.res.Configuration; import android.graphics.Point; import android.os.Bundle; import android.text.Editable; import android.text.method.KeyListener; import android.util.Log; import android.view.Display; import android.view.KeyEvent; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.LinearLayout; import android.widget.SeekBar; import android.widget.TextView; import android.widget.Toast; import androidx.annotation.NonNull; import java.math.BigDecimal; import java.util.StringTokenizer; public class MainActivity extends Activity { /** * 定义变量 */ //舍入精度 public  static final  int[] DEF_DIV_SCALE = {17}; //初始化显示数据 private final String[] init =new String[1]; //显示框 private EditText input;// 用于显示输出结果 //划动条 private SeekBar seekBar; //普通控件及变量 private Button[] btn = new Button[10];// 0~9十个数字 private TextView mem, _drg, tip; private Button div, mul, sub, add, equal, sin, cos, tan, log, ln, sqrt, square, factorial, bksp, left, right, dot, bd, db, drg, mc, c; public String str_old; public String str_new; public boolean vbegin = true;// 控制输入，true为重新输入，false为接着输入 public boolean drg_flag = true;// true为角度，false为弧度 public double pi = 4 * Math.atan(1);// π值 public boolean tip_lock = true;// true为正确，可以继续输入，false错误，输入锁定 public boolean equals_flag = true;// 是否在按下=之后输入，true为之前，false为之后 //定义ContextMenu中每个菜单选项的Id final int Menu_1 = Menu.FIRST; final int Menu_2 = Menu.FIRST + 1; private ClipboardManager mClipboard = null; public boolean onCreateOptionsMenu(Menu menu) { //导入菜单布局 getMenuInflater().inflate(R.menu.main, menu); return true; } public boolean onOptionsItemSelected(MenuItem item) { //创建菜单项的点击事件 switch (item.getItemId()) { case R.id.menu_setting: Toast.makeText(this, "点击了设置", Toast.LENGTH_SHORT).show(); break; case R.id.menu_out: //                Toast.makeText(this, "点击了退出", Toast.LENGTH_SHORT).show(); android.os.Process.killProcess(android.os.Process.myPid());//获取PID System.exit(0); break; default: break; } return super.onOptionsItemSelected(item); } /** *onCreate */ @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); //切换布局后调用，初始化显示 if(savedInstanceState!=null){ init[0] = savedInstanceState.getString("exp"); equals_flag = false; } //屏幕方向监听 int orientation = getResources().getConfiguration().orientation; if (orientation == Configuration.ORIENTATION_LANDSCAPE) { // 横屏内容 setContentView(R.layout.activity_main2); InitWigdet(); AllWigdetListener(); } else if (orientation == Configuration.ORIENTATION_PORTRAIT) { // 竖屏内容 setContentView(R.layout.activity_main); input = (EditText)findViewById(R.id.textView); input.setText(init[0]); seekBar = (SeekBar) findViewById(R.id.seekBar); seekBar.setProgress(DEF_DIV_SCALE[0]); seekBar.setOnSeekBarChangeListener(onSeekBarChangeListener); Display defaultDisplay = getWindowManager().getDefaultDisplay(); Point point = new Point(); defaultDisplay.getSize(point); Integer x = point.x; Integer y = point.y; input.setKeyListener(new KeyListener() { @Override public int getInputType() { return 0; } @Override public boolean onKeyDown(View view, Editable editable, int i, KeyEvent keyEvent) { return false; } @Override public boolean onKeyUp(View view, Editable editable, int i, KeyEvent keyEvent) { return false; } @Override public boolean onKeyOther(View view, Editable editable, KeyEvent keyEvent) { return false; } @Override public void clearMetaKeyState(View view, Editable editable, int i) { } }); View.OnClickListener onClearListener = new View.OnClickListener() { @Override public void onClick(View view) { input.setText(""); } }; View.OnClickListener onClearLastListener = new View.OnClickListener() { @Override public void onClick(View view) { String s = input.getText().toString(); int len = s.length(); if(len>0) { s = s.substring(0, len - 1); input.setText(s); } } }; View.OnClickListener onEXPListener = new View.OnClickListener() { @Override public void onClick(View view) { Button temp = (Button)view; String s = temp.getText().toString(); String show = input.getText().toString(); int len = show.length(); if(show.length()==0){ if(s.equals("+")||s.equals("×")||s.equals("÷")) return; } if((show.endsWith("+"))||(show.endsWith("-"))||(show.endsWith("×"))||(show.endsWith("÷"))||(show.endsWith("."))){ if(s.equals("+")||s.equals("×")||s.equals("÷")||s.equals("-")||(s.equals("."))){ show = show.substring(0,len-1) + s; input.setText(show); }else{ input.append(s); } }else{ input.append(s); } } }; View.OnClickListener onEXECListener = new View.OnClickListener() { @Override public void onClick(View view) { String s = input.getText().toString(); if(s.length()==0) return; s = s.replace("×","*"); s = s.replace("÷","/"); s = s.replace("%",""); if((s.endsWith("+"))||(s.endsWith("-"))||(s.endsWith("*"))||(s.endsWith("/"))||(s.endsWith(".")))return; try{ String re = Calculator.conversion(s); re = round(re,DEF_DIV_SCALE[0]); if(re.indexOf(".") > 0){ re = re.replaceAll("0+?$", "");//去掉多余的0 re = re.replaceAll("[.]$", "");//如最后一位是.则去掉 } input.setText(re); }catch (Exception e){ Toast.makeText(getApplicationContext(), e.toString(), Toast.LENGTH_SHORT).show(); input.setText(""); } } }; View.OnClickListener onPERCENTCListener = new View.OnClickListener() { @Override public void onClick(View view) { String s = input.getText().toString(); if(s.length()==0) return; s = s.replace("×","*"); s = s.replace("÷","/"); s = s.replace("%",""); if((s.endsWith("+"))||(s.endsWith("-"))||(s.endsWith("*"))||(s.endsWith("/"))||(s.endsWith("."))) return; s = s+"/100"; try{ String re = Calculator.conversion(s); re = round(re,DEF_DIV_SCALE[0]); if(re.indexOf(".") > 0){ re = re.replaceAll("0+?$", "");//去掉多余的0 re = re.replaceAll("[.]$", "");//如最后一位是.则去掉 } input.setText(re+"%"); }catch (Exception e){ Toast.makeText(getApplicationContext(), e.toString(), Toast.LENGTH_SHORT).show(); input.setText(""); } } }; input.getLayoutParams().height = 2*y/7; Button button5 = (Button)findViewById(R.id.button5);    button5.getLayoutParams().width = x/4 ;button5.getLayoutParams().height = y/8; Button button6 = (Button)findViewById(R.id.button6);    button6.getLayoutParams().width = x/4 ;button6.getLayoutParams().height = y/8; Button button7 = (Button)findViewById(R.id.button7);    button7.getLayoutParams().width = x/4 ;button7.getLayoutParams().height = y/8; Button button8 = (Button)findViewById(R.id.button8);    button8.getLayoutParams().width = x/4 ;button8.getLayoutParams().height = y/8; Button button9 = (Button)findViewById(R.id.button9);    button9.getLayoutParams().width = x/4 ;button9.getLayoutParams().height = y/8; Button button10 = (Button)findViewById(R.id.button10);  button10.getLayoutParams().width = x/4 ;button10.getLayoutParams().height = y/8; Button button11 = (Button)findViewById(R.id.button11);  button11.getLayoutParams().width = x/4 ;button11.getLayoutParams().height = y/8; Button button12 = (Button)findViewById(R.id.button12);  button12.getLayoutParams().width = x/4 ;button12.getLayoutParams().height = y/8; Button button13 = (Button)findViewById(R.id.button13);  button13.getLayoutParams().width = x/4 ;button13.getLayoutParams().height = y/8; Button button14 = (Button)findViewById(R.id.button14);  button14.getLayoutParams().width = x/4 ;button14.getLayoutParams().height = y/8; Button button15 = (Button)findViewById(R.id.button15);  button15.getLayoutParams().width = x/4 ;button15.getLayoutParams().height = y/8; Button button16 = (Button)findViewById(R.id.button16);  button16.getLayoutParams().width = x/4 ;button16.getLayoutParams().height = y/8; Button button17 = (Button)findViewById(R.id.button17);  button17.getLayoutParams().width = x/4 ;button17.getLayoutParams().height = y/8; Button button18 = (Button)findViewById(R.id.button18);  button18.getLayoutParams().width = x/4 ;button18.getLayoutParams().height = y/8; Button button19 = (Button)findViewById(R.id.button19);  button19.getLayoutParams().width = x/4 ;button19.getLayoutParams().height = y/8; Button button20 = (Button)findViewById(R.id.button20);  button20.getLayoutParams().width = x/4 ;button20.getLayoutParams().height = 2*(y/8); Button button21 = (Button)findViewById(R.id.button21);  button21.getLayoutParams().width = x/4 ;button21.getLayoutParams().height = y/8; Button button22 = (Button)findViewById(R.id.button22);  button22.getLayoutParams().width = x/4 ;button22.getLayoutParams().height = y/8; Button button23 = (Button)findViewById(R.id.button23);  button23.getLayoutParams().width = x/4 ;button23.getLayoutParams().height = y/8; button6.setOnClickListener(onEXPListener);button7.setOnClickListener(onEXPListener); button9.setOnClickListener(onEXPListener);button10.setOnClickListener(onEXPListener); button11.setOnClickListener(onEXPListener);button12.setOnClickListener(onEXPListener); button13.setOnClickListener(onEXPListener);button14.setOnClickListener(onEXPListener); button15.setOnClickListener(onEXPListener);button16.setOnClickListener(onEXPListener); button17.setOnClickListener(onEXPListener);button18.setOnClickListener(onEXPListener); button19.setOnClickListener(onEXPListener);button21.setOnClickListener(onEXPListener); button22.setOnClickListener(onEXPListener);button23.setOnClickListener(onEXPListener); button5.setOnClickListener(onClearListener); button8.setOnClickListener(onClearLastListener); button20.setOnClickListener(onEXECListener); button21.setOnClickListener(onPERCENTCListener); } } /** * 初始化所有的组件 */ private void InitWigdet() { //获取屏幕参数 Display defaultDisplay = getWindowManager().getDefaultDisplay(); Point point = new Point(); defaultDisplay.getSize(point); Integer x = point.x; Integer y = point.y - 60; // 获取界面元素 input = (EditText) findViewById(R.id.input); input.setKeyListener(new KeyListener() { @Override public int getInputType() { return 0; } @Override public boolean onKeyDown(View view, Editable editable, int i, KeyEvent keyEvent) { return false; } @Override public boolean onKeyUp(View view, Editable editable, int i, KeyEvent keyEvent) { return false; } @Override public boolean onKeyOther(View view, Editable editable, KeyEvent keyEvent) { return false; } @Override public void clearMetaKeyState(View view, Editable editable, int i) { } }); input.setText(init[0]); seekBar = (SeekBar) findViewById(R.id.seekBar); //seekBar.getLayoutParams().height = y/7/3; seekBar.setProgress(DEF_DIV_SCALE[0]); seekBar.setOnSeekBarChangeListener(onSeekBarChangeListener); input.getLayoutParams().height = y/9; mem = (TextView) findViewById(R.id.mem); tip = (TextView) findViewById(R.id.tip); _drg = (TextView) findViewById(R.id._drg); _drg.getLayoutParams().width = x/6 ;_drg.getLayoutParams().height = y/10-8; btn[0] = (Button) findViewById(R.id.zero); btn[0].getLayoutParams().width = x/6 ;btn[0].getLayoutParams().height = y/10; btn[1] = (Button) findViewById(R.id.one); btn[1].getLayoutParams().width = x/6 ;btn[1].getLayoutParams().height = y/10; btn[2] = (Button) findViewById(R.id.two); btn[2].getLayoutParams().width = x/6 ;btn[2].getLayoutParams().height = y/10; btn[3] = (Button) findViewById(R.id.three); btn[3].getLayoutParams().width = x/6 ;btn[3].getLayoutParams().height = y/10; btn[4] = (Button) findViewById(R.id.four); btn[4].getLayoutParams().width = x/6 ;btn[4].getLayoutParams().height = y/10; btn[5] = (Button) findViewById(R.id.five); btn[5].getLayoutParams().width = x/6 ;btn[5].getLayoutParams().height = y/10; btn[6] = (Button) findViewById(R.id.six); btn[6].getLayoutParams().width = x/6 ;btn[6].getLayoutParams().height = y/10; btn[7] = (Button) findViewById(R.id.seven); btn[7].getLayoutParams().width = x/6 ;btn[7].getLayoutParams().height = y/10; btn[8] = (Button) findViewById(R.id.eight); btn[8].getLayoutParams().width = x/6 ;btn[8].getLayoutParams().height = y/10; btn[9] = (Button) findViewById(R.id.nine); btn[9].getLayoutParams().width = x/6 ;btn[9].getLayoutParams().height = y/10; div = (Button) findViewById(R.id.divide); div.getLayoutParams().width = x/6 ;div.getLayoutParams().height = y/10; mul = (Button) findViewById(R.id.mul);mul.getLayoutParams().width = x/6 ;mul.getLayoutParams().height = y/10; sub = (Button) findViewById(R.id.sub); sub.getLayoutParams().width = x/6 ;sub.getLayoutParams().height = y/10; add = (Button) findViewById(R.id.add); add.getLayoutParams().width = x/6 ;add.getLayoutParams().height = y/10; equal = (Button) findViewById(R.id.equal); equal.getLayoutParams().width = 2*x/6 ;equal.getLayoutParams().height = y/10; sin = (Button) findViewById(R.id.sin); sin.getLayoutParams().width = x/6 ;sin.getLayoutParams().height = y/10-8; cos = (Button) findViewById(R.id.cos); cos.getLayoutParams().width = x/6 ;cos.getLayoutParams().height = y/10-8; tan = (Button) findViewById(R.id.tan); tan.getLayoutParams().width = x/6 ;tan.getLayoutParams().height = y/10-8; log = (Button) findViewById(R.id.log); log.getLayoutParams().width = x/6 ;log.getLayoutParams().height = y/10; ln = (Button) findViewById(R.id.ln); ln.getLayoutParams().width = x/6 ;ln.getLayoutParams().height = y/10; sqrt = (Button) findViewById(R.id.sqrt); sqrt.getLayoutParams().width = x/6 ;sqrt.getLayoutParams().height = y/10; square = (Button) findViewById(R.id.square); square.getLayoutParams().width = x/6 ;square.getLayoutParams().height = y/10; factorial = (Button) findViewById(R.id.factorial);factorial.getLayoutParams().width = x/6 ;factorial.getLayoutParams().height = y/10-8; bksp = (Button) findViewById(R.id.bksp);bksp.getLayoutParams().width = 2*x/6 ;bksp.getLayoutParams().height = y/10-8; left = (Button) findViewById(R.id.left); left.getLayoutParams().width = x/6 ;left.getLayoutParams().height = y/10; right = (Button) findViewById(R.id.right); right.getLayoutParams().width = x/6 ;right.getLayoutParams().height = y/10; dot = (Button) findViewById(R.id.dot);dot.getLayoutParams().width = x/6 ;dot.getLayoutParams().height = y/10; bd = (Button) findViewById(R.id.bd); LinearLayout linearLayout = (LinearLayout) findViewById(R.id.linear);linearLayout.getLayoutParams().width = x/6 ;linearLayout.getLayoutParams().height = y/10; db = (Button) findViewById(R.id.db); drg = (Button) findViewById(R.id.drg);drg.getLayoutParams().width = x/6 ;drg.getLayoutParams().height = y/10-8; mc = (Button) findViewById(R.id.mc); mc.getLayoutParams().width = 2*x/6 ;mc.getLayoutParams().height = y/10-8; c = (Button) findViewById(R.id.c); c.getLayoutParams().width = 2*x/6 ;c.getLayoutParams().height = y/10-8; } /** * 为所有按键绑定监听器 */ private void AllWigdetListener() { // 数字键 for (int i = 0; i <10; i++) { btn[i].setOnClickListener(actionPerformed); } // 为+-x÷等按键绑定监听器 div.setOnClickListener(actionPerformed); mul.setOnClickListener(actionPerformed); sub.setOnClickListener(actionPerformed); add.setOnClickListener(actionPerformed); equal.setOnClickListener(actionPerformed); sin.setOnClickListener(actionPerformed); cos.setOnClickListener(actionPerformed); tan.setOnClickListener(actionPerformed); log.setOnClickListener(actionPerformed); ln.setOnClickListener(actionPerformed); sqrt.setOnClickListener(actionPerformed); square.setOnClickListener(actionPerformed); factorial.setOnClickListener(actionPerformed); bksp.setOnClickListener(actionPerformed); left.setOnClickListener(actionPerformed); right.setOnClickListener(actionPerformed); dot.setOnClickListener(actionPerformed); bd.setOnClickListener(actionPerformed); db.setOnClickListener(actionPerformed); drg.setOnClickListener(actionPerformed); mc.setOnClickListener(actionPerformed); c.setOnClickListener(actionPerformed); } /** * 键盘命令捕捉 */ String[] TipCommand = new String[500]; int tip_i = 0;// TipCommand的指针 private View.OnClickListener actionPerformed = new View.OnClickListener() { public void onClick(View v) { // 按键上的命令获取 String command = ((Button) v).getText().toString(); // 显示器上的字符串 String str = input.getText().toString(); // 检测输入是否合法 if (equals_flag == false && "0123456789.()sincostanlnlogn!+-×÷√^".indexOf(command) != -1) { // 检测显示器上的字符串是否合法 if (right(str)) { if ("+-×÷√^)".indexOf(command) != -1) { for (int i = 0; i  0) TipChecker(TipCommand[tip_i - 1], command); else if (tip_i == 0) { TipChecker("#", command); } if ("0123456789.()sincostanlnlogn!+-×÷√^".indexOf(command) != -1 && tip_lock) { TipCommand[tip_i] = command; tip_i++; } // 若输入正确，则将输入信息显示到显示器上 if ("0123456789.()sincostanlnlogn!+-×÷√^".indexOf(command) != -1 && tip_lock) { // 共25个按键 print(command); // 若果点击了“DRG”，则切换当前弧度角度制，并将切换后的结果显示到按键上方。 } else if (command.compareTo("DRG") == 0 && tip_lock) { if (drg_flag == true) { drg_flag = false; _drg.setText("RAD"); } else { drg_flag = true; _drg.setText("DEG"); } // 如果输入时退格键，并且是在按=之前 } else if (command.compareTo("◁") == 0 && equals_flag) { // 一次删除3个字符 if (TTO(str) == 3) { if (str.length() > 3) input.setText(str.substring(0, str.length() - 3)); else if (str.length() == 3) { input.setText("0"); vbegin = true; tip_i = 0; tip.setText("welcome use the APP！"); } // 依次删除2个字符 } else if (TTO(str) == 2) { if (str.length() > 2) input.setText(str.substring(0, str.length() - 2)); else if (str.length() == 2) { input.setText("0"); vbegin = true; tip_i = 0; tip.setText("welcome use the APP！"); } // 依次删除一个字符 } else if (TTO(str) == 1) { // 若之前输入的字符串合法则删除一个字符 if (right(str)) { if (str.length() > 1) input.setText(str.substring(0, str.length() - 1)); else if (str.length() == 1) { input.setText("0"); vbegin = true; tip_i = 0; tip.setText("welcome use the APP！"); } // 若之前输入的字符串不合法则删除全部字符 } else { input.setText("0"); vbegin = true; tip_i = 0; tip.setText("welcome use the APP！"); } } if (input.getText().toString().compareTo("-") == 0 || equals_flag == false) { input.setText("0"); vbegin = true; tip_i = 0; tip.setText("welcome use the APP！"); } tip_lock = true; if (tip_i > 0) tip_i--; // 如果是在按=之后输入退格键 } else if (command.compareTo("Bksp") == 0 && equals_flag == false) { // 将显示器内容设置为0 input.setText("0"); vbegin = true; tip_i = 0; tip_lock = true; tip.setText("welcome use the APP！"); // 如果输入的是清除键 } else if (command.compareTo("C") == 0) { // 将显示器内容设置为0 input.setText("0"); // 重新输入标志置为true vbegin = true; // 缓存命令位数清0 tip_i = 0; // 表明可以继续输入 tip_lock = true; // 表明输入=之前 equals_flag = true; tip.setText("welcome use the APP！"); // 如果输入的是”MC“，则将存储器内容清0 } else if (command.compareTo("MC") == 0) { mem.setText("0"); // 如果按”bd“则转换进制 } else if (command.compareTo("B") == 0) { String s = input.getText().toString(); s = s.replace(".",""); //非法字符清屏 if(".+-x÷√^sincostanloglnn!()".indexOf(s) != -1){ input.setText("0"); }else { try { int a = Integer.valueOf(s); String re = Integer.toBinaryString(a); input.setText(re); }catch (Exception e){ input.setText(""); Toast.makeText(getApplicationContext(), e.toString(), Toast.LENGTH_SHORT).show(); } } // 如果按”db“则转换进制 }else if(command.compareTo("D") == 0){ String s = input.getText().toString(); s = s.replace(".",""); input.setText("1234567890"); //非法字符清屏 if("23456789+-x÷√^sincostanloglnn!().".indexOf(s) != -1){ input.setText("0"); }else{ try{ Integer re = Integer.parseInt(s,2); input.setText(re.toString()); }catch (Exception e){ input.setText(""); Toast.makeText(getApplicationContext(), e.toString(), Toast.LENGTH_SHORT).show(); } } } else if (command.compareTo("=") == 0 && tip_lock && right(str) && equals_flag) { tip_i = 0; // 表明不可以继续输入 tip_lock = false; // 表明输入=之后 equals_flag = false; // 保存原来算式样子 str_old = str; // 替换算式中的运算符，便于计算 str = str.replaceAll("sin", "s"); str = str.replaceAll("cos", "c"); str = str.replaceAll("tan", "t"); str = str.replaceAll("log", "g"); str = str.replaceAll("ln", "l"); str = str.replaceAll("n!", "!"); // 重新输入标志设置true vbegin = true; // 将-1x转换成- str_new = str.replaceAll("-", "-1×"); // 计算算式结果 new calc().process(str_new); } // 表明可以继续输入 tip_lock = true; } }; /* * 检测函数，对str进行前后语法检测 为Tip的提示方式提供依据，与TipShow()配合使用 编号 字符 其后可以跟随的合法字符 1 （ * 数字|（|-|.|函数 2 ） 算符|）|√ ^ 3 . 数字|算符|）|√ ^ 4 数字 .|数字|算符|）|√ ^ 5 算符 * 数字|（|.|函数 6 √ ^ （ |. | 数字 7 函数 数字|（|. * * 小数点前后均可省略，表示0 数字第一位可以为0 */ private void TipChecker(String tipcommand1, String tipcommand2) { // Tipcode1表示错误类型，Tipcode2表示名词解释类型 int Tipcode1 = 0, Tipcode2 = 0; // 表示命令类型 int tiptype1 = 0, tiptype2 = 0; // 括号数 int bracket = 0; // “+-x÷√^”不能作为第一位 if (tipcommand1.compareTo("#") == 0 && (tipcommand2.compareTo("÷") == 0 || tipcommand2.compareTo("×") == 0 || tipcommand2.compareTo("+") == 0 || tipcommand2.compareTo(")") == 0 || tipcommand2.compareTo("√") == 0 || tipcommand2 .compareTo("^") == 0)) { Tipcode1 = -1; } // 定义存储字符串中最后一位的类型 else if (tipcommand1.compareTo("#") != 0) { if (tipcommand1.compareTo("(") == 0) { tiptype1 = 1; } else if (tipcommand1.compareTo(")") == 0) { tiptype1 = 2; } else if (tipcommand1.compareTo(".") == 0) { tiptype1 = 3; } else if ("0123456789".indexOf(tipcommand1) != -1) { tiptype1 = 4; } else if ("+-×÷".indexOf(tipcommand1) != -1) { tiptype1 = 5; } else if ("√^".indexOf(tipcommand1) != -1) { tiptype1 = 6; } else if ("sincostanloglnn!".indexOf(tipcommand1) != -1) { tiptype1 = 7; } // 定义欲输入的按键类型 if (tipcommand2.compareTo("(") == 0) { tiptype2 = 1; } else if (tipcommand2.compareTo(")") == 0) { tiptype2 = 2; } else if (tipcommand2.compareTo(".") == 0) { tiptype2 = 3; } else if ("0123456789".indexOf(tipcommand2) != -1) { tiptype2 = 4; } else if ("+-×÷".indexOf(tipcommand2) != -1) { tiptype2 = 5; } else if ("√^".indexOf(tipcommand2) != -1) { tiptype2 = 6; } else if ("sincostanloglnn!".indexOf(tipcommand2) != -1) { tiptype2 = 7; } switch (tiptype1) { case 1: // 左括号后面直接接右括号,“+x÷”（负号“-”不算）,或者"√^" if (tiptype2 == 2 || (tiptype2 == 5 && tipcommand2.compareTo("-") != 0) || tiptype2 == 6) Tipcode1 = 1; break; case 2: // 右括号后面接左括号，数字，“+-x÷sin^...” if (tiptype2 == 1 || tiptype2 == 3 || tiptype2 == 4 || tiptype2 == 7) Tipcode1 = 2; break; case 3: // “.”后面接左括号或者“sincos...” if (tiptype2 == 1 || tiptype2 == 7) Tipcode1 = 3; // 连续输入两个“.” if (tiptype2 == 3) Tipcode1 = 8; break; case 4: // 数字后面直接接左括号或者“sincos...” if (tiptype2 == 1 || tiptype2 == 7) Tipcode1 = 4; break; case 5: // “+-x÷”后面直接接右括号，“+-x÷√^” if (tiptype2 == 2 || tiptype2 == 5 || tiptype2 == 6) Tipcode1 = 5; break; case 6: // “√^”后面直接接右括号，“+-x÷√^”以及“sincos...” if (tiptype2 == 2 || tiptype2 == 5 || tiptype2 == 6 || tiptype2 == 7) Tipcode1 = 6; break; case 7: // “sincos...”后面直接接右括号“+-x÷√^”以及“sincos...” if (tiptype2 == 2 || tiptype2 == 5 || tiptype2 == 6 || tiptype2 == 7) Tipcode1 = 7; break; } } // 检测小数点的重复性，Tipconde1=0,表明满足前面的规则 if (Tipcode1 == 0 && tipcommand2.compareTo(".") == 0) { int tip_point = 0; for (int i = 0; i  1) { Tipcode1 = 8; } } // 检测右括号是否匹配 if (Tipcode1 == 0 && tipcommand2.compareTo(")") == 0) { int tip_right_bracket = 0; for (int i = 0; i  0) { Tipcode1 = 9; bracket = tip_bracket; } else if (tip_bracket == 0) { // 若前一个字符是以下之一，表明=号不合法 if ("√^sincostanloglnn!".indexOf(tipcommand1) != -1) { Tipcode1 = 6; } // 若前一个字符是以下之一，表明=号不合法 if ("+-×÷".indexOf(tipcommand1) != -1) { Tipcode1 = 5; } } } // 若命令式以下之一，则显示相应的帮助信息 if (tipcommand2.compareTo("MC") == 0) Tipcode2 = 1; if (tipcommand2.compareTo("C") == 0) Tipcode2 = 2; if (tipcommand2.compareTo("DRG") == 0) Tipcode2 = 3; if (tipcommand2.compareTo("Bksp") == 0) Tipcode2 = 4; if (tipcommand2.compareTo("sin") == 0) Tipcode2 = 5; if (tipcommand2.compareTo("cos") == 0) Tipcode2 = 6; if (tipcommand2.compareTo("tan") == 0) Tipcode2 = 7; if (tipcommand2.compareTo("log") == 0) Tipcode2 = 8; if (tipcommand2.compareTo("ln") == 0) Tipcode2 = 9; if (tipcommand2.compareTo("n!") == 0) Tipcode2 = 10; if (tipcommand2.compareTo("√") == 0) Tipcode2 = 11; if (tipcommand2.compareTo("^") == 0) Tipcode2 = 12; // 显示帮助和错误信息 TipShow(bracket, Tipcode1, Tipcode2, tipcommand1, tipcommand2); } /* * 反馈Tip信息，加强人机交互，与TipChecker()配合使用 */ private void TipShow(int bracket, int tipcode1, int tipcode2,String tipcommand1, String tipcommand2) { String tipmessage = ""; if (tipcode1 != 0) tip_lock = false;// 表明输入有误 switch (tipcode1) { case -1: tipmessage = tipcommand2 + "  不能作为第一个算符\n"; break; case 1: tipmessage = tipcommand1 + "  后应输入：数字/(/./-/函数 \n"; break; case 2: tipmessage = tipcommand1 + "  后应输入：)/算符 \n"; break; case 3: tipmessage = tipcommand1 + "  后应输入：)/数字/算符 \n"; break; case 4: tipmessage = tipcommand1 + "  后应输入：)/./数字 /算符 \n"; break; case 5: tipmessage = tipcommand1 + "  后应输入：(/./数字/函数 \n"; break; case 6: tipmessage = tipcommand1 + "  后应输入：(/./数字 \n"; break; case 7: tipmessage = tipcommand1 + "  后应输入：(/./数字 \n"; break; case 8: tipmessage = "小数点重复\n"; break; case 9: tipmessage = "不能计算，缺少 " + bracket + " 个 )"; break; case 10: tipmessage = "不需要  )"; break; } switch (tipcode2) { case 1: tipmessage = tipmessage + "[MC 用法: 清除记忆 MEM]"; break; case 2: tipmessage = tipmessage + "[C 用法: 归零]"; break; case 3: tipmessage = tipmessage + "[DRG 用法: 选择 DEG 或 RAD]"; break; case 4: tipmessage = tipmessage + "[Bksp 用法: 退格]"; break; case 5: tipmessage = tipmessage + "sin 函数用法示例：\n" + "DEG：sin30 = 0.5      RAD：sin1 = 0.84\n" + "注：与其他函数一起使用时要加括号，如：\n" + "sin(cos45)，而不是sincos45"; break; case 6: tipmessage = tipmessage + "cos 函数用法示例：\n" + "DEG：cos60 = 0.5      RAD：cos1 = 0.54\n" + "注：与其他函数一起使用时要加括号，如：\n" + "cos(sin45)，而不是cossin45"; break; case 7: tipmessage = tipmessage + "tan 函数用法示例：\n" + "DEG：tan45 = 1      RAD：tan1 = 1.55\n" + "注：与其他函数一起使用时要加括号，如：\n" + "tan(cos45)，而不是tancos45"; break; case 8: tipmessage = tipmessage + "log 函数用法示例：\n" + "log10 = log(5+5) = 1\n" + "注：与其他函数一起使用时要加括号，如：\n" + "log(tan45)，而不是logtan45"; break; case 9: tipmessage = tipmessage + "ln 函数用法示例：\n" + "ln10 = le(5+5) = 2.3   lne = 1\n" + "注：与其他函数一起使用时要加括号，如：\n" + "ln(tan45)，而不是lntan45"; break; case 10: tipmessage = tipmessage + "n! 函数用法示例：\n" + "n!3 = n!(1+2) = 3×2×1 = 6\n" + "注：与其他函数一起使用时要加括号，如：\n" + "n!(log1000)，而不是n!log1000"; break; case 11: tipmessage = tipmessage + "√ 用法示例：开任意次根号\n" + "如：27开3次根为  27√3 = 3\n" + "注：与其他函数一起使用时要加括号，如：\n" + "(函数)√(函数) ， (n!3)√(log100) = 2.45"; break; case 12: tipmessage = tipmessage + "^ 用法示例：开任意次平方\n" + "如：2的3次方为  2^3 = 8\n" + "注：与其他函数一起使用时要加括号，如：\n" + "(函数)√(函数) ， (n!3)^(log100) = 36"; break; } // 将提示信息显示到tip tip.setText(tipmessage); } /** * 将信息显示在显示屏上 */ private void print(String str) { // 清屏后输出 if (vbegin) { input.setText(str); } else { input.append(str); } vbegin = false; } /* * 检测函数，返回值为3、2、1 表示应当一次删除几个？ Three+Two+One = TTO 为Bksp按钮的删除方式提供依据 * 返回3，表示str尾部为sin、cos、tan、log中的一个，应当一次删除3个 返回2，表示str尾部为ln、n!中的一个，应当一次删除2个 * 返回1，表示为除返回3、2外的所有情况，只需删除一个（包含非法字符时要另外考虑：应清屏） */ private int TTO(String str) { if ((str.charAt(str.length() - 1) == 'n' && str.charAt(str.length() - 2) == 'i' && str.charAt(str .length() - 3) == 's') || (str.charAt(str.length() - 1) == 's' && str.charAt(str.length() - 2) == 'o' && str .charAt(str.length() - 3) == 'c') || (str.charAt(str.length() - 1) == 'n' && str.charAt(str.length() - 2) == 'a' && str .charAt(str.length() - 3) == 't') || (str.charAt(str.length() - 1) == 'g' && str.charAt(str.length() - 2) == 'o' && str .charAt(str.length() - 3) == 'l')) { return 3; } else if ((str.charAt(str.length() - 1) == 'n' && str.charAt(str .length() - 2) == 'l') || (str.charAt(str.length() - 1) == '!' && str.charAt(str .length() - 2) == 'n')) { return 2; } else { return 1; } } /* * 判断一个str是否是合法的，返回值为true、false * 只包含0123456789.()sincostanlnlogn!+-×÷√^的是合法的str，返回true * 包含了除0123456789.()sincostanlnlogn!+-×÷√^以外的字符的str为非法的，返回false */ private boolean right(String str) { int i = 0; for (i = 0; i = '0' || ch == '.' || ch == 'E') { num = expToken.nextToken(); ch_gai = ch; Log.e("guojs", ch + "--->" + i); // 取得整个数字 while (i = '0' || ch_gai == '.' || ch_gai == 'E')) { ch_gai = expression.charAt(i++); Log.e("guojs", "i的值为：" + i); } // 将指针退回之前的位置 if (i >= expression.length()) i -= 1; else { i -= 2; } if (num.compareTo(".") == 0) number[topNum++] = 0; // 将正负符号转移给数字 else { number[topNum++] = Double.parseDouble(num) * flag; flag = 1; } } // 计算运算符的优先级 if (ch == '(') weightPlus += 4; if (ch == ')') weightPlus -= 4; if (ch == '-' && flag == 1 || ch == '+' || ch == '×' || ch == '÷' || ch == 's' || ch == 'c' || ch == 't' || ch == 'g' || ch == 'l' || ch == '!' || ch == '√' || ch == '^') { switch (ch) { // +-的优先级最低，为1 case '+': case '-': weightTemp = 1 + weightPlus; break; // x÷的优先级稍高，为2 case '×': case '÷': weightTemp = 2 + weightPlus; break; // sincos之类优先级为3 case 's': case 'c': case 't': case 'g': case 'l': case '!': weightTemp = 3 + weightPlus; break; // 其余优先级为4 // case '^': // case '√': default: weightTemp = 4 + weightPlus; break; } // 如果当前优先级大于堆栈顶部元素，则直接入栈 if (topOp == 0 || weight[topOp - 1]  0 && weight[topOp - 1] >= weightTemp) { switch (operator[topOp - 1]) { // 取出数字数组的相应元素进行运算 case '+': number[topNum - 2] += number[topNum - 1]; break; case '-': number[topNum - 2] -= number[topNum - 1]; break; case '×': number[topNum - 2] *= number[topNum - 1]; break; // 判断除数为0的情况 case '÷': if (number[topNum - 1] == 0) { showError(1, str_old); return; } number[topNum - 2] /= number[topNum - 1]; break; case '√': if (number[topNum - 1] == 0 || (number[topNum - 2] <0 && number[topnum - 1] % 2== 0)) { showerror(2, str_old); return; } 2]=Math.pow( 2], 1> 170) { showError(3, str_old); return; } else if (number[topNum - 1] <0) { showError(2, str_old); return; } number[topNum - 1] = N(number[topNum - 1]); topNum++; break; } // 继续取堆栈的下一个元素进行判断 topNum--; topOp--; } // 将运算符如堆栈 weight[topOp] = weightTemp; operator[topOp] = ch; topOp++; } } i++; } // 依次取出堆栈的运算符进行运算 while (topOp > 0) { // +-x直接将数组的后两位数取出运算 switch (operator[topOp - 1]) { case '+': number[topNum - 2] += number[topNum - 1]; break; case '-': number[topNum - 2] -= number[topNum - 1]; break; case '×': number[topNum - 2] *= number[topNum - 1]; break; // 涉及到除法时要考虑除数不能为零的情况 case '÷': if (number[topNum - 1] == 0) { showError(1, str_old); return; } number[topNum - 2] /= number[topNum - 1]; break; case '√': if (number[topNum - 1] == 0 || (number[topNum - 2] <0 && number[topnum - 1] % 2== 0)) { showerror(2, str_old); return; } 2]=Math.pow(number[topNum 2], 1> 170) { showError(3, str_old); return; } else if (number[topNum - 1] <0) { showError(2, str_old); return; } number[topNum - 1] = N(number[topNum - 1]); topNum++; break; } // 取堆栈下一个元素计算 topNum--; topOp--; } // 如果是数字太大，提示错误信息 if (number[0] > 7.3E306) { showError(3, str_old); return; } // 输出最终结果 input.setText(String.valueOf(FP(number[0]))); tip.setText("计算完毕，要继续请按归零键 C"); mem.setText(str_old + "=" + String.valueOf(FP(number[0]))); } /* * FP = floating point 控制小数位数，达到精度 否则会出现 * 0.6-0.2=0.39999999999999997的情况，用FP即可解决，使得数为0.4 本格式精度为15位 */ public double FP(double n) { // NumberFormat format=NumberFormat.getInstance(); //创建一个格式化类f // format.setMaximumFractionDigits(18); //设置小数位的格式 //            DecimalFormat format = new DecimalFormat("0.#############"); Double re = n; String s = round(re.toString(),DEF_DIV_SCALE[0]); return Double.parseDouble(s); } /* * 阶乘算法 */ public double N(double n) { int i = 0; double sum = 1; // 依次将小于等于n的值相乘 for (i = 1; i <= n; i++) { sum = sum * i; } return sum; } /* * 错误提示，按了"="之后，若计算式在process()过程中，出现错误，则进行提示 */ public void showError(int code, String str) { String message = ""; switch (code) { case 1: message = "零不能作除数"; break; case 2: message = "函数格式错误"; break; case 3: message = "值太大了，超出范围"; } input.setText("\"" + str + "\"" + ": " + message); tip.setText(message + "\n" + "计算完毕，要继续请按归零键 C"); } } /** *保存切换页面时EditEext中的值 */ @Override   //这种方式保存数据只是临时保存，无法永久保存 protected void onSaveInstanceState(@NonNull Bundle outState) {  //该函数用于提取出历史数据，保存到outState中 super.onSaveInstanceState(outState); init[0] = input.getText().toString(); outState.putString("exp",init[0]); } /** *舍入精度 */ public static String round(String v, int scale) { if (scale <0) { throw new IllegalArgumentException( "The scale must be a positive integer or zero"); } BigDecimal b = new BigDecimal(v); BigDecimal one = new BigDecimal("1"); BigDecimal re = b.divide(one, scale, BigDecimal.ROUND_HALF_UP); return re.toString(); } //    @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; //    } /** *音量键事件 */ @Override public boolean onKeyDown (int keyCode, KeyEvent event) { String s = input.getText().toString(); if(s.length()<1){ }else { switch (keyCode) { // 音量减小 case KeyEvent.KEYCODE_VOLUME_DOWN: if(DEF_DIV_SCALE[0]>1) DEF_DIV_SCALE[0]--; seekBar.setProgress(DEF_DIV_SCALE[0]); Toast.makeText(this.getApplicationContext(), "DOWN " + DEF_DIV_SCALE[0], Toast.LENGTH_SHORT).show(); if(s.contains(".")) input.setText(round(s,DEF_DIV_SCALE[0])); // 音量减小时应该执行的功能代码 return true; // 音量增大 case KeyEvent.KEYCODE_VOLUME_UP: if(DEF_DIV_SCALE[0]<40) DEF_DIV_SCALE[0]++; seekBar.setProgress(DEF_DIV_SCALE[0]); Toast.makeText(this.getApplicationContext(), "UP " + DEF_DIV_SCALE[0], Toast.LENGTH_SHORT).show(); if(s.contains(".")) input.setText(round(s,DEF_DIV_SCALE[0])); // 音量增大时应该执行的功能代码 return true; } } return super.onKeyDown (keyCode, event); } /** * 滑动条事件 */ public SeekBar.OnSeekBarChangeListener onSeekBarChangeListener = new SeekBar.OnSeekBarChangeListener() { @Override public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { //txt_cur.setText("当前进度值:" + progress + "  / 100 "); String s = input.getText().toString(); if(s.length()<1){ return; }else{ if(progress>DEF_DIV_SCALE[0]){ DEF_DIV_SCALE[0] = progress; Toast.makeText(getApplicationContext(), "UP " + DEF_DIV_SCALE[0], Toast.LENGTH_SHORT).show(); if(s.contains(".")) input.setText(round(s,DEF_DIV_SCALE[0])); }else if(progress