安卓版四则运算
1 package com.example.add; 2 3 import java.io.BufferedWriter; 4 import java.io.File; 5 import java.io.FileWriter; 6 import java.io.IOException; 7 8 import com.example.add.opt; 9 10 import java.text.DecimalFormat; 11 12 import android.support.v7.app.ActionBarActivity; 13 import android.support.v7.app.ActionBar; 14 import android.support.v4.app.Fragment; 15 import android.text.InputType; 16 import android.os.Bundle; 17 import android.view.LayoutInflater; 18 import android.view.Menu; 19 import android.view.MenuItem; 20 import android.view.View; 21 import android.view.ViewGroup; 22 import android.os.Build; 23 import android.app.Activity; 24 import android.os.Bundle; 25 import android.view.View; 26 import android.widget.Button; 27 import android.widget.EditText; 28 import android.widget.TextView; 29 import android.widget.Toast; 30 31 public class MainActivity extends Activity { 32 33 int x;//题目个数 34 int y=0; 35 int n; 36 int i=1; 37 char[] op = { '+', '-', '*', '/' }; 38 int[] nov = new int[4]; 39 int zf;//控制正负 40 int zz;//题型控制 41 String str = new String(); 42 String str1 = new String(); 43 int[] num1 = new int[5]; 44 String s[] = new String[5]; 45 int num2=0; 46 float[] anser=new float[5];//用户的答案 47 float[] trueanser=new float[5];//正确答案 48 File file; 49 int a=0; 50 int b=0; 51 int bb=0; 52 // int c = 0; 53 opt opt=new opt();; 54 EditText editText,xs; 55 StringBuffer text,text1; 56 String number_1="",number_2=""; 57 boolean clicked=false; 58 byte style=0; 59 Button btn_1,btn_2,btn_3,btn_4,btn_5,btn_6,btn_7,btn_8,btn_9,btn_0; 60 Button start,btn_eq,btn_dot,btn_clear; 61 /** Called when the activity is first created. */ 62 @Override 63 public void onCreate(Bundle savedInstanceState) { 64 super.onCreate(savedInstanceState); 65 setContentView(R.layout.fragment_main); 66 text=new StringBuffer(); 67 editText=(EditText)findViewById(R.id.result); 68 xs=(EditText)findViewById(R.id.xs); 69 //editText.setFocusable(false); 70 btn_1=(Button) findViewById(R.id.btn_1); 71 btn_1.setOnClickListener(new Button.OnClickListener(){ 72 73 public void onClick(View v) { 74 // TODO Auto-generated method stub 75 if(clicked){ 76 editText.setText(""); 77 clicked=false; 78 text.setLength(0); 79 } 80 text.append("7"); 81 editText.setText(text.toString()); 82 83 } 84 85 }); 86 btn_2=(Button) findViewById(R.id.btn_2); 87 btn_2.setOnClickListener(new Button.OnClickListener(){ 88 89 public void onClick(View v) { 90 // TODO Auto-generated method stub 91 if(clicked){ 92 editText.setText(""); 93 clicked=false; 94 text.setLength(0); 95 } 96 text.append("8"); 97 editText.setText(text.toString()); 98 } 99 }); 100 btn_3=(Button) findViewById(R.id.btn_3); 101 btn_3.setOnClickListener(new Button.OnClickListener(){ 102 103 public void onClick(View v) { 104 // TODO Auto-generated method stub 105 if(clicked){ 106 editText.setText(""); 107 clicked=false; 108 text.setLength(0); 109 } 110 text.append("9"); 111 editText.setText(text.toString()); 112 } 113 114 }); 115 btn_4=(Button) findViewById(R.id.btn_4); 116 btn_4.setOnClickListener(new Button.OnClickListener(){ 117 118 public void onClick(View v) { 119 // TODO Auto-generated method stub 120 if(clicked){ 121 editText.setText(""); 122 clicked=false; 123 text.setLength(0); 124 } 125 text.append("4"); 126 editText.setText(text.toString()); 127 } 128 129 }); 130 btn_5=(Button) findViewById(R.id.btn_5); 131 btn_5.setOnClickListener(new Button.OnClickListener(){ 132 133 public void onClick(View v) { 134 // TODO Auto-generated method stub 135 if(clicked){ 136 editText.setText(""); 137 clicked=false; 138 text.setLength(0); 139 } 140 text.append("5"); 141 editText.setText(text.toString()); 142 } 143 144 }); 145 btn_6=(Button) findViewById(R.id.btn_6); 146 btn_6.setOnClickListener(new Button.OnClickListener(){ 147 148 public void onClick(View v) { 149 // TODO Auto-generated method stub 150 if(clicked){ 151 editText.setText(""); 152 clicked=false; 153 text.setLength(0); 154 } 155 text.append("6"); 156 editText.setText(text.toString()); 157 } 158 159 }); 160 btn_7=(Button) findViewById(R.id.btn_7); 161 btn_7.setOnClickListener(new Button.OnClickListener(){ 162 163 public void onClick(View v) { 164 // TODO Auto-generated method stub 165 if(clicked){ 166 editText.setText(""); 167 clicked=false; 168 text.setLength(0); 169 } 170 text.append("1"); 171 editText.setText(text.toString()); 172 } 173 174 }); 175 btn_8=(Button) findViewById(R.id.btn_8); 176 btn_8.setOnClickListener(new Button.OnClickListener(){ 177 178 public void onClick(View v) { 179 // TODO Auto-generated method stub 180 if(clicked){ 181 editText.setText(""); 182 clicked=false; 183 text.setLength(0); 184 } 185 text.append("2"); 186 editText.setText(text.toString()); 187 } 188 189 }); 190 btn_9=(Button) findViewById(R.id.btn_9); 191 btn_9.setOnClickListener(new Button.OnClickListener(){ 192 193 public void onClick(View v) { 194 // TODO Auto-generated method stub 195 if(clicked){ 196 editText.setText(""); 197 clicked=false; 198 text.setLength(0); 199 } 200 text.append("3"); 201 editText.setText(text.toString()); 202 } 203 204 }); 205 btn_0=(Button) findViewById(R.id.btn_0); 206 btn_0.setOnClickListener(new Button.OnClickListener(){ 207 208 public void onClick(View v) { 209 // TODO Auto-generated method stub 210 if(clicked){ 211 editText.setText(""); 212 clicked=false; 213 text.setLength(0); 214 } 215 text.append("0"); 216 editText.setText(text.toString()); 217 } 218 219 }); 220 btn_dot=(Button) findViewById(R.id.btn_dot); 221 btn_dot.setOnClickListener(new Button.OnClickListener(){ 222 223 public void onClick(View v) { 224 // TODO Auto-generated method stub 225 if(clicked){ 226 editText.setText(""); 227 clicked=false; 228 text.setLength(0); 229 } 230 if(editText.getText().toString().indexOf(".")==-1){//已经有.了 231 if(text.length()==0){ 232 text.append("0."); 233 }else{ 234 text.append("."); 235 } 236 editText.setText(text.toString()); 237 } 238 } 239 240 }); 241 btn_eq=(Button) findViewById(R.id.btn_eq); 242 btn_eq.setOnClickListener(new Button.OnClickListener(){ 243 244 public void onClick(View v) { 245 // TODO Auto-generated method stub 246 if(b==1) 247 { 248 if(editText.getText().toString().length()!=0) 249 { 250 try 251 { 252 x=Integer.parseInt(editText.getText().toString()); 253 if(x>=0 && x<=5)b++; 254 else Toast.makeText(MainActivity.this, "输入有误", 1).show(); 255 } 256 catch(NumberFormatException x) 257 { 258 Toast.makeText(MainActivity.this, "输入有误", 1).show(); 259 } 260 } 261 else Toast.makeText(MainActivity.this, "输入有误", 1).show(); 262 editText.setText(""); 263 number_1=""; 264 number_2=""; 265 style=0; 266 clicked=false; 267 text.setLength(0); 268 } 269 if(b==2) 270 { 271 if(n!=0)anser[i-2]=Float.parseFloat(editText.getText().toString()); 272 str1="第"+i+"条题目为:"; 273 n=(int)(Math.random() * 4 + 2);//随机出运算符的数量 274 zz=(int)(Math.random()*2); 275 for(int j=0;j<n;j++) 276 { 277 //zf=(int)(Math.random()*2); 278 //if(zf==0)//负 279 // num1[j]=-(int)(Math.random()*100);//产生随机数 280 //else //正 281 num1[j]=(int)(Math.random()*100); 282 if(zz==1)num1[j]=(int)(Math.random()*10+1); 283 } 284 for(int k=0;k<n-1;k++) 285 { 286 nov[k]=(int)(Math.random()*4); 287 if(nov[k]==3&&num1[k+1]==0) 288 { 289 do 290 { 291 num1[k+1]=(int)(Math.random()*100); 292 }while(num1[k+1]==0); 293 } 294 } 295 str=""; 296 if(zz==0) 297 { 298 for(int j=0;j<n;j++) 299 { 300 //if(num1[j]<0)str=str+"("+String.valueOf(num1[j])+")"; 301 str=str+String.valueOf(num1[j]); 302 if(j==n-1) 303 { 304 //try 305 //{ 306 //int ii=0; 307 try{ 308 trueanser[i-1]=opt.Math(str); 309 DecimalFormat df = new DecimalFormat("#.00"); 310 trueanser[i-1]=Float.parseFloat(df.format(trueanser[i-1])); 311 } catch (Exception e1) { 312 // TODO 自动生成的 catch 块 313 e1.printStackTrace(); 314 } 315 //} 316 /*catch (Exception e1) 317 { 318 System.out.println(e1); 319 //e1.printStackTrace(); 320 }*/ 321 str=str+"="; 322 //str=str+String.valueOf(trueanser[i-1]); 323 xs.setText(str1+str); 324 break; 325 } 326 str=str+op[nov[j]]; 327 } 328 } 329 if(zz==1) 330 { 331 trueanser[i-1]=1; 332 str=String.valueOf(num1[0])+"!="; 333 for(int j=1;j<=num1[0];j++) 334 trueanser[i-1]=trueanser[i-1]*j; 335 //str=str+String.valueOf(trueanser[i-1]); 336 xs.setText(str1+str); 337 } 338 if(i==x+1) 339 { 340 b=3; 341 anser[i-2]=Float.parseFloat(editText.getText().toString()); 342 } 343 else i++; 344 editText.setText(""); 345 number_1=""; 346 number_2=""; 347 style=0; 348 clicked=false; 349 text.setLength(0); 350 } 351 if(b==3) 352 { 353 y=0; 354 for(int j=0;j<x;j++) 355 { 356 if(anser[j]==trueanser[j])y++; 357 } 358 xs.setText("答题完成!答对"+y+"道!"); 359 b=0; 360 editText.setText(""); 361 number_1=""; 362 number_2=""; 363 style=0; 364 clicked=false; 365 text.setLength(0); 366 } 367 } 368 }); 369 start=(Button) findViewById(R.id.start); 370 start.setOnClickListener(new Button.OnClickListener(){ 371 372 public void onClick(View v) { 373 // TODO Auto-generated method stub 374 xs.setText("请输入出题数量!(1-5)"); 375 n=0; 376 i=1; 377 b=1; 378 } 379 }); 380 btn_clear=(Button) findViewById(R.id.btn_clear); 381 btn_clear.setOnClickListener(new Button.OnClickListener(){ 382 383 public void onClick(View v) { 384 // TODO Auto-generated method stub 385 editText.setText(""); 386 number_1=""; 387 number_2=""; 388 style=0; 389 clicked=false; 390 text.setLength(0); 391 } 392 }); 393 } 394 }
1 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 2 android:layout_width="fill_parent" 3 android:layout_height="fill_parent" 4 android:orientation="vertical" > 5 6 <EditText 7 android:id="@+id/result" 8 android:layout_width="match_parent" 9 android:layout_height="wrap_content" 10 android:cursorVisible="false" 11 android:digits="1234567890." 12 android:ems="10" 13 android:focusable="false" 14 android:numeric="decimal" 15 android:singleLine="true" /> 16 17 <TableLayout 18 android:layout_width="fill_parent" 19 android:layout_height="wrap_content" 20 android:stretchColumns="0,1,2,3" > 21 22 <TableRow> 23 24 <Button 25 android:id="@+id/btn_1" 26 android:text="7" /> 27 28 <Button 29 android:id="@+id/btn_2" 30 android:text="8" /> 31 32 <Button 33 android:id="@+id/btn_3" 34 android:text="9" /> 35 </TableRow> 36 37 <TableRow> 38 39 <Button 40 android:id="@+id/btn_4" 41 android:text="4" /> 42 43 <Button 44 android:id="@+id/btn_5" 45 android:text="5" /> 46 47 <Button 48 android:id="@+id/btn_6" 49 android:text="6" /> 50 </TableRow> 51 52 <TableRow> 53 54 <Button 55 android:id="@+id/btn_7" 56 android:text="1" /> 57 58 <Button 59 android:id="@+id/btn_8" 60 android:text="2" /> 61 62 <Button 63 android:id="@+id/btn_9" 64 android:text="3" /> 65 </TableRow> 66 67 <TableRow> 68 69 <Button 70 android:id="@+id/btn_dot" 71 android:text="." /> 72 73 <Button 74 android:id="@+id/btn_0" 75 android:text="0" /> 76 77 <Button 78 android:id="@+id/btn_eq" 79 android:text="确定" /> 80 </TableRow> 81 </TableLayout> 82 83 <Button 84 android:id="@+id/btn_clear" 85 android:layout_width="fill_parent" 86 android:layout_height="wrap_content" 87 android:text="清除" /> 88 89 <EditText 90 android:id="@+id/xs" 91 android:layout_width="wrap_content" 92 android:layout_height="wrap_content" 93 android:focusable="false" 94 android:text="欢迎使用四则运算程序!" > 95 96 <requestFocus /> 97 </EditText> 98 99 <Button 100 android:id="@+id/start" 101 android:layout_width="wrap_content" 102 android:layout_height="wrap_content" 103 android:text="开始" /> 104 105 </LinearLayout>
1 package com.example.add; 2 import java.util.Stack; 3 public class opt 4 { 5 public float Math(String str) throws Exception 6 { 7 String[] operater =new String[20]; 8 String[] number = new String[20]; 9 Stack countStack1 = new Stack(); 10 Stack countStack2 = new Stack(); 11 float result =0; 12 float x=0; 13 number = str.split("\\/|\\*|\\+|\\-"); 14 operater= str.split("\\d+"); 15 if(number.length<2)throw new Exception("请输入两位计算数以上!"); 16 for(int i = 0; i<number.length;i++) 17 { 18 try 19 { 20 x=Float.parseFloat(number[i]); 21 } 22 catch(NumberFormatException e) 23 { 24 throw new Exception("输入错误!请重新输入!"); 25 } 26 if(operater[i].equals("/"))if(x==0)throw new Exception("除数不能为0!"); 27 countStack1.push(number[i]); 28 if(i!=number.length-1) 29 { 30 if(operater[i+1]!=null)countStack1.push(operater[i+1]); 31 } 32 } 33 while(!countStack1.isEmpty())countStack2.push(countStack1.pop()); 34 String op; 35 while(!countStack2.isEmpty()) 36 { 37 result=0; 38 op=countStack2.pop().toString(); 39 if(op.equals("*")) 40 { 41 result=Float.parseFloat(countStack1.pop().toString())*Float.parseFloat(countStack2.pop().toString()); 42 if(number.length==2)return result; 43 countStack1.push(result); 44 continue; 45 } 46 if(op.equals("/")) 47 { 48 result=Float.parseFloat(countStack1.pop().toString())/Float.parseFloat(countStack2.pop().toString()); 49 if(number.length==2)return result; 50 countStack1.push(result); 51 continue; 52 } 53 countStack1.push(op); 54 } 55 while(!countStack1.isEmpty())countStack2.push(countStack1.pop()); 56 while(!countStack2.isEmpty()) 57 { 58 result=0; 59 op = countStack2.pop().toString(); 60 if(op.equals("+")) 61 { 62 result=Float.parseFloat(countStack1.pop().toString())+Float.parseFloat(countStack2.pop().toString()); 63 countStack1.push(result); 64 continue; 65 } 66 if(op.equals("-")) 67 { 68 result=Float.parseFloat(countStack1.pop().toString())-Float.parseFloat(countStack2.pop().toString()); 69 countStack1.push(result); 70 continue; 71 } 72 countStack1.push(op); 73 } 74 return result; 75 } 76 }
这一次将我们之前的程序转换成了安卓应用版,主要功能尚未有多大变化,接下来几天将会继续改进!
程序截图:
PS:程序界面比较简陋!我们会试着改进的!