Android-简便计算器

Android-简便计算器

自己做的简单计算器。

源代码项目下载地址。

FTP地址：ftp://www.bkjia.com

用户名：www.bkjia.com

密码：www.muu.cc

在 2011年LinuxIDC.com\8月\Android-简便计算器

下载方法见这里 http://www.bkjia.net/thread-1187-1-1.html

就一个activity

1. package zhang.calculator;  
2.   
3. import android.app.Activity;  
4. import android.app.AlertDialog;  
5. import android.os.Bundle;  
6. import android.os.Vibrator;  
7. import android.view.Menu;  
8. import android.view.MenuItem;  
9. import android.view.View;  
10. import android.widget.Button;  
11. import android.widget.TextView;  
12. import android.widget.Toast;  
13. public class MyCalculator extends Activity {   
14.     private Vibrator vibrator;    
15.     private Double num_a;  
16.     private Double num_b;  
17.     private TextView text = null;  
18.     private String temp = null;// 计算符号   
19.     private boolean isDot = true;// 小数点控制   
20.     private boolean clickable = true;// 标志是否按过计算按钮   
21.     private double memoryd; // 使用内存中存储的数字   
22.     private int memoryi;  
23.     private TextView lable=null;  
24.     private boolean isVib=true;  
25.   
26.     public void onCreate(Bundle savedInstanceState) {  
27.         super.onCreate(savedInstanceState);  
28.         setContentView(R.layout.calculator_main);  
29.         final Button num1 = (Button) findViewById(R.id.num1);  
30.         final Button num2 = (Button) findViewById(R.id.num2);  
31.         final Button num3 = (Button) findViewById(R.id.num3);  
32.         final Button num4 = (Button) findViewById(R.id.num4);  
33.         final Button num5 = (Button) findViewById(R.id.num5);  
34.         final Button num6 = (Button) findViewById(R.id.num6);  
35.         final Button num7 = (Button) findViewById(R.id.num7);  
36.         final Button num8 = (Button) findViewById(R.id.num8);  
37.         final Button num9 = (Button) findViewById(R.id.num9);  
38.         Button num0 = (Button) findViewById(R.id.zero);  
39.         Button point=(Button) findViewById(R.id.point);  
40.         Button mul=(Button)findViewById(R.id.mul);  
41.         Button sub=(Button)findViewById(R.id.sub);  
42.         Button add=(Button)findViewById(R.id.add);  
43.         Button div=(Button)findViewById(R.id.div);  
44.         Button sqrt=(Button)findViewById(R.id.sqrt);  
45.         Button equal=(Button) findViewById(R.id.equal);  
46.         Button c=(Button) findViewById(R.id.clear);  
47.         Button cm=(Button)findViewById(R.id.clearm);  
48.         Button m=(Button)findViewById(R.id.memory);  
49.         Button tf=(Button)findViewById(R.id.tf);  
50.         Button mshow=(Button)findViewById(R.id.showmemory);  
51.         Button back=(Button)findViewById(R.id.back);  
52.         text = (TextView) findViewById(R.id.showText);  
53.         lable = (TextView) findViewById(R.id.lable);  
54.           
55.         vibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE);     
56.           
57. //0        
58.         num0.setOnClickListener(new Button.OnClickListener() {  
59.             public void onClick(View v) {             
60.                 zd();  
61.                 if(text.getText().toString().equalsIgnoreCase("0")){  
62.                   
63.                 }else{  
64.                 if (clickable == false) {                         
65.                     text.setText("");  
66.                     text.setText(text.getText().toString()+"0");  
67.                     clickable = true;  
68.                 } else {  
69.                     text.setText(text.getText().toString()+"0");  
70.                 }  
71.             }     
72.         }  
73.     });  
74. //1   
75.         num1.setOnClickListener(new View.OnClickListener() {  
76.             public void onClick(View v) {  
77.                 show(num1.getText().toString());  
78.             }  
79.         });  
80. // 2   
81.         num2.setOnClickListener(new View.OnClickListener() {  
82.             public void onClick(View v) {  
83.                 show(num2.getText().toString());  
84.             }  
85.         });  
86. // 3   
87.         num3.setOnClickListener(new View.OnClickListener() {  
88.             public void onClick(View v) {  
89.                 show(num3.getText().toString());  
90.             }  
91.         });  
92. // 4   
93.         num4.setOnClickListener(new View.OnClickListener() {  
94.             public void onClick(View v) {  
95.                 show(num4.getText().toString());  
96.             }  
97.         });  
98. // 5   
99.         num5.setOnClickListener(new View.OnClickListener() {  
100.             public void onClick(View v) {  
101.                 show(num5.getText().toString());  
102.             }  
103.         });  
104. // 6   
105.         num6.setOnClickListener(new View.OnClickListener() {  
106.             public void onClick(View v) {  
107.                 show(num6.getText().toString());  
108.             }  
109.         });  
110. // 7   
111.         num7.setOnClickListener(new View.OnClickListener() {  
112.             public void onClick(View v) {  
113.                 show(num7.getText().toString());  
114.             }  
115.         });  
116. // 8   
117.         num8.setOnClickListener(new View.OnClickListener() {  
118.             public void onClick(View v) {  
119.                 show(num8.getText().toString());  
120.             }  
121.         });  
122. // 9   
123.         num9.setOnClickListener(new View.OnClickListener() {  
124.             public void onClick(View v) {  
125.                 show(num9.getText().toString());  
126.             }  
127.         });  
128. //.   
129.         point.setOnClickListener(new View.OnClickListener() {  
130.             public void onClick(View arg0) {  
131.                 zd();  
132.                     if(text.getText().toString().equalsIgnoreCase("")){  
133.                     }else{    
134.                         if (text.getText().toString()!=""&&isDot == true) {  
135.                             text.setText(text.getText()+".");  
136.                             isDot = false;  
137.                         }else{  
138.                         text.setText(text.getText().toString());  
139.                         }     
140.                     }  
141.                 }  
142.             });  
143. //加   
144.         add.setOnClickListener(new View.OnClickListener() {  
145.             public void onClick(View v) {  
146.                 zd();  
147.                 if(text.getText().toString().equalsIgnoreCase("")){  
148.                 }else{  
149.                 if (text.getText() != null){  
150.                     num_a =Double.parseDouble(text.getText().toString());  
151.                     temp = "add";  
152.                     clickable = false;  
153.                     isDot=true;  
154.                     lable.setText("＋");  
155.                     }  
156.                 }  
157.             }  
158.     });  
159. //减   
160.         sub.setOnClickListener(new View.OnClickListener() {  
161.             public void onClick(View v) {  
162.                 zd();  
163.                 if(text.getText().toString().equalsIgnoreCase("")){  
164.                 }else{  
165.                     if (text.getText() != null){  
166.                         num_a =Double.parseDouble(text.getText().toString());  
167.                         temp = "sub";  
168.                         clickable = false;  
169.                         lable.setText("—");  
170.                     }else{  
171.                         text.setText("—");  
172.                         }  
173.                 isDot=true;  
174.         }  
175.     }  
176. });  
177. //乘   
178.         mul.setOnClickListener(new View.OnClickListener() {  
179.             public void onClick(View v) {  
180.                 zd();  
181.                 if(text.getText().toString().equalsIgnoreCase("")){  
182.                 }else{  
183.                 if (text.getText() != null){  
184.                     num_a =Double.parseDouble(text.getText().toString());  
185.                     temp = "mul";  
186.                     lable.setText("×");  
187.                     clickable = false;  
188.                     isDot=true;  
189.                     }  
190.                 }  
191.             }  
192.         });  
193. // 除   
194.         div.setOnClickListener(new View.OnClickListener() {  
195.             public void onClick(View v) {  
196.                 zd();  
197.                 if(text.getText().toString().equalsIgnoreCase("")){  
198.                 }else{  
199.                 if (text.getText() != null){  
200.                     num_a =Double.parseDouble(text.getText().toString());  
201.                     temp = "div";  
202.                     lable.setText("÷");  
203.                     clickable = false;  
204.                     isDot=true;  
205.                     }  
206.                 }  
207.             }  
208.         });  
209. //开方   
210.         sqrt.setOnClickListener(new View.OnClickListener() {  
211.             public void onClick(View arg0) {  
212.                 zd();  
213.                 if(text.getText().toString().equalsIgnoreCase("")){  
214.                 }else{  
215.                 String s = text.getText().toString();  
216.                   if (s.charAt(0) == '-') {  
217.                       Toast.makeText(MyCalculator.this, "负数不能开根号！！",Toast.LENGTH_SHORT).show();  
218.                     clickable = false;  
219.                   } else {  
220.                     text.setText(Double.toString(java.lang.Math.sqrt(Double.parseDouble(text.getText().toString()))));  
221.         lable.setText("√");  
222.                     clickable = false;  
223.                     }  
224.                 }  
225.             }  
226.         });  
227.           
228. //等于   
229.         equal.setOnClickListener(new View.OnClickListener() {  
230.             public void onClick(View v) {  
231.                 zd();  
232.                 if (temp != null && text.getText() != null){  
233.                     num_b = (Double.parseDouble(text.getText().toString()));  
234.                     if (temp == "add"){  
235.                         text.setText(Float.toString((float) (num_a + num_b)));  
236.                         temp = null;  
237.                     }else if (temp == "sub"){  
238.                         text.setText(Float.toString((float) (num_a - num_b)));  
239.                         temp = null;  
240.                     }else if (temp == "mul"){  
241.                         text.setText(Float.toString((float) (num_a * num_b)));  
242.                         temp = null;  
243.                     }else if (temp == "div"){  
244.                         text.setText(Float.toString((float) (num_a / num_b)));  
245.                         temp = null;  
246.                     }  
247.                     clickable = false;  
248.                     if(text.getText().toString()==""){  
249.                         isDot =true;  
250.                     }else{  
251.                         isDot =false;  
252.                     }  
253.                 }  
254.             }  
255.         });  
256. //c   
257.             c.setOnClickListener(new View.OnClickListener() {  
258.             public void onClick(View arg0) {  
259.                 zd();  
260.                     text.setText("");  
261.                     lable.setText("");  
262.                     num_a = 0.0;  
263.                     temp = null;  
264.                     clickable = false;  
265.                     isDot = true;  
266.                 }  
267.         });  
268. //cm   
269.             cm.setOnClickListener(new View.OnClickListener() {  
270.                 public void onClick(View arg0) {      
271.                     zd();  
272.                         memoryd = memoryi = 0;  
273.                     }  
274.             });  
275. //m   
276.             m.setOnClickListener(new View.OnClickListener() {  
277.                 public void onClick(View arg0) {      
278.                     zd();  
279.                     if (text.getText().toString() != " "){  
280.                         boolean isDot = false;  
281.                         for (int i = 0; i < text.getText().length(); i++){  
282.                             if ('.' == text.getText().charAt(i)) {  
283.                                 isDot = true;  
284.                                 break;  
285.                             }  
286.                         }  
287.                         if(text.getText().toString().equalsIgnoreCase("")){  
288.                             memoryd = memoryi = 0;  
289.                         }  
290.                         else{  
291.                         if (isDot == true) {  
292.                             memoryd = Double.parseDouble(text.getText().toString());  
293.                             memoryi = 0;   
294.                         }  
295.                         else {    
296.                             memoryi = Integer.parseInt(text.getText().toString());  
297.                             memoryd = 0;  
298.                         }  
299.                         }  
300.                         clickable = false;  
301.                     }  
302.                     }  
303.             });  
304. //ms   
305.             mshow.setOnClickListener(new View.OnClickListener() {  
306.                 public void onClick(View arg0) {  
307.                     zd();  
308.                     if (memoryd != 0) {  
309.                         text.setText(Double.toString(memoryd));  
310.                     }  
311.                     if (memoryi != 0) {  
312.                         text.setText(Integer.toString(memoryi));  
313.                     }  
314.                     clickable = false;  
315.                 }  
316.             });  
317. //取反   
318.             tf.setOnClickListener(new View.OnClickListener() {  
319.                 public void onClick(View arg0) {  
320.                         zd();  
321.                     if(text.getText().toString().equalsIgnoreCase("")){  
322.                     }else{  
323.                     boolean isNumber = true;  
324.                       String s = text.getText().toString();  
325.                       for (int i = 0; i < s.length(); i++)  
326.                         if (!(s.charAt(i) >= '0' && s.charAt(i) <= '9'  
327.                               || s.charAt(i) == '.' || s.charAt(i) == '-')) {  
328.                             isNumber = false;  
329.                             break;  
330.                         }  
331.                       if (isNumber == true) {  
332.                         //如果当前字符串首字母有'-'号,代表现在是个负数,再按下时,则将首符号去掉   
333.                         if (s.charAt(0) == '-') {  
334.                             text.setText("");  
335.                             for (int i = 1; i < s.length(); i++) {  
336.                               char a = s.charAt(i);  
337.                               text.setText(text.getText().toString() + a);  
338.                             }  
339.                         }  
340.                         //如果当前字符串第一个字符不是符号，则添加一个符号在首字母处   
341.                         else  
342.                             text.setText('-' + s);  
343.                       }  
344.                 }}  
345.             });  
346.               
347. //back   
348.             back.setOnClickListener(new View.OnClickListener() {  
349.                 public void onClick(View arg0) {  
350.                     zd();  
351.                     if(clickable == true)  
352.                     if (text.getText().toString() != "") {  
353.                           String s = text.getText().toString();  
354.                           text.setText("");  
355.                           for (int i = 0; i < s.length() - 1; i++) {  
356.                             char a = s.charAt(i);  
357.                             text.setText(text.getText().toString() + a);  
358.                           }  
359.                     }  
360.                 }  
361.             });       
362.     }  
363.     public void zd(){   //振动的方法   
364.         if(isVib==true){  
365.         long[] pattern = {0, 20, 0, 10}; // OFF/ON/OFF/ON...      
366.         vibrator.vibrate(pattern, -1);  
367.         }else{  
368.           
369.             vibrator.cancel();  
370.         }  
371.     }  
372.     public void show(String i){                                                 //1-9的数   
373.         zd();  
374.         if (clickable == false) {  
375.             text.setText("");  
376.             text.setText(text.getText() + i);  
377.             clickable = true;  
378.         } else {  
379.             text.setText(text.getText() + i);  
380.         }  
381.     }  
382.     public boolean onCreateOptionsMenu(Menu menu) {    //添加菜单   
383.         // TODO Auto-generated method stub   
384.         menu.add(0, 1, 1,R.string.exit);  
385.         menu.add(0, 2, 2, R.string.about);  
386.         menu.add(1,3,3,"开/关震动");  
387.         return super.onCreateOptionsMenu(menu);  
388.     }  
389.     public boolean onOptionsItemSelected(MenuItem item) {  //设置菜单事件   
390.         switch(item.getItemId()){  
391.         case 1:  
392.             finish();  
393.             break;  
394.         case 2:  
395.             AlertDialog.Builder dialog = new AlertDialog.Builder(this);  
396.             dialog.setTitle("关于").setMessage("This is a black cool convenient calculator!\nBy：没落凄凉").show();  
397.             break;  
398.         case 3:  
399.             if(isVib){  
400.                 isVib=false;  
401.             }else{  
402.                 isVib=true;  
403.             }  
404.         }  
405.           
406.           
407.         return super.onOptionsItemSelected(item);     
408.     }  
409. }