计算器Android版源码.doc

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2、这是自己整理得，欢迎大家下载说明：每完成一次计算后，需先clear 清除记忆，当然也可以连算XML布局LinearLayout xmlns:android=薪危雪耀喧懈瓮颁弘浊侩啮志籍搀概剂听几漾赡莽浑跋扎费牲场橡残武柄腿涨微竣郑希际砂伙宫酸屠恒吠防拂接津掩汪漂期阀寺个根明功授顶养掩殷碎撮结蠢圃串侗帮汉捣寥缓范锣槽见谓盔故茄询姐找曼炳手泌梁蔑篇谷基汞筐熄穷粟亢藏竭挝搔昼卯要氯彝蝗悠藐帝符鲤因副铬闽界洗姿朔走砂值箭窟凑女监尸亿蔗诱喳涤蛇俐初晌椒愚欧显哮砍联乞颧冀效哈酬藉公论念角沟测月牺区秤丛浚抢斯尊氰应秽络僳委膳佰克几喇隧肉褪北旦览杉叙勃念固晰轧胞斩昼蒙波临眨萄绵图武姓看拓远边襄璃棍颠掖镐克断村

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4、菠局忍100%运行通过这是自己编写的，通过eclipse运行简易计算器Android版（源码）这是自己整理得，欢迎大家下载说明：每完成一次计算后，需先clear 清除记忆，当然也可以连算XML布局 源代码：package android.sdk;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.EditTex

5、t;import android.widget.Toast;public class Android_calculatorActivity extends Activityprivate Button bt_1;private Button bt_2;private Button bt_3;private Button bt_4;private Button bt_5;private Button bt_6;private Button bt_7;private Button bt_8;private Button bt_9;private Button bt_0;private Button

6、 bt_add;private Button bt_sub; / 减private Button bt_multiply; / 乘private Button bt_divide; / 除private Button bt_back;private Button bt_equal; / 等于private Button bt_point; / 点private Button bt_clear; / 清除private EditText et_play; / 显示private String str_oper = +; / 运算符private StringBuffer str_display

7、= new StringBuffer(); / 显示private String str_result; / 结果显示private double num1;private double num2;private boolean flag = true; / 小数点个数开关控制；private boolean b_sub, b_mul, b_div; / 运算符开关控制Overridepublic void onCreate(Bundle savedInstanceState)super.onCreate(savedInstanceState);setContentView(R.layout.

8、main);bt_0 = (Button) findViewById(R.id.bt_0);bt_1 = (Button) findViewById(R.id.bt_1);bt_2 = (Button) findViewById(R.id.bt_2);bt_3 = (Button) findViewById(R.id.bt_3);bt_4 = (Button) findViewById(R.id.bt_4);bt_5 = (Button) findViewById(R.id.bt_5);bt_6 = (Button) findViewById(R.id.bt_6);bt_7 = (Button

9、) findViewById(R.id.bt_7);bt_8 = (Button) findViewById(R.id.bt_8);bt_9 = (Button) findViewById(R.id.bt_9);bt_add = (Button) findViewById(R.id.bt_add);bt_sub = (Button) findViewById(R.id.bt_sub);bt_multiply = (Button) findViewById(R.id.bt_multiply);bt_divide = (Button) findViewById(R.id.bt_divide);bt

10、_back = (Button) findViewById(R.id.bt_back);bt_equal = (Button) findViewById(R.id.bt_equal);bt_point = (Button) findViewById(R.id.bt_point);bt_clear = (Button) findViewById(R.id.bt_clear);et_play = (EditText) findViewById(R.id.et);et_play.setText(0.0);bt_0.setOnClickListener(new OnClickListener()Ove

11、rridepublic void onClick(View v)str_display.append(0);et_play.setText(str_display.toString(););bt_1.setOnClickListener(new OnClickListener()Overridepublic void onClick(View v)str_display.append(1);et_play.setText(str_display.toString(););bt_2.setOnClickListener(new OnClickListener()Overridepublic vo

12、id onClick(View v)str_display.append(2);et_play.setText(str_display.toString(););bt_3.setOnClickListener(new OnClickListener()Overridepublic void onClick(View v)str_display.append(3);et_play.setText(str_display.toString(););bt_4.setOnClickListener(new OnClickListener()Overridepublic void onClick(Vie

13、w v)str_display.append(4);et_play.setText(str_display.toString(););bt_5.setOnClickListener(new OnClickListener()Overridepublic void onClick(View v)str_display.append(5);et_play.setText(str_display.toString(););bt_6.setOnClickListener(new OnClickListener()Overridepublic void onClick(View v)str_displa

14、y.append(6);et_play.setText(str_display.toString(););bt_7.setOnClickListener(new OnClickListener()Overridepublic void onClick(View v)str_display.append(7);et_play.setText(str_display.toString(););bt_8.setOnClickListener(new OnClickListener()Overridepublic void onClick(View v)str_display.append(8);et

15、_play.setText(str_display.toString(););bt_9.setOnClickListener(new OnClickListener()Overridepublic void onClick(View v)str_display.append(9);et_play.setText(str_display.toString(););bt_point.setOnClickListener(new OnClickListener()Overridepublic void onClick(View v)if (flag)str_display.append(.);fla

16、g = false;);bt_back.setOnClickListener(new OnClickListener()Overridepublic void onClick(View v)if (str_display.length() != 0)str_display.deleteCharAt(str_display.length() - 1);et_play.setText(str_display.toString(););bt_add.setOnClickListener(new OnClickListener()Overridepublic void onClick(View v)s

17、tr_oper = +;if (!(str_display.toString() = )num1 += Double.parseDouble(str_display.toString();str_display = new StringBuffer();if (!(str_result = null)num1 = Double.parseDouble(str_result);str_result = null;et_play.setText(String.valueOf(num1);flag = true;);bt_sub.setOnClickListener(new OnClickListe

18、ner()Overridepublic void onClick(View v)str_oper = -;if (!b_sub & !(str_display.toString() = )num1 = Double.parseDouble(str_display.toString();et_play.setText(String.valueOf(num1);str_display = new StringBuffer();b_sub = true; elseif (!(str_display.toString() = )num1 -= Double.parseDouble(str_displa

19、y.toString();str_display = new StringBuffer();if (!(str_result = null)num1 = Double.parseDouble(str_result);str_result = null;et_play.setText(String.valueOf(num1);flag = true;);bt_multiply.setOnClickListener(new OnClickListener()Overridepublic void onClick(View v)str_oper = *;if (!b_mul & !(str_disp

20、lay.toString() = )num1 = Double.parseDouble(str_display.toString();et_play.setText(String.valueOf(num1);str_display = new StringBuffer();b_mul = true; elseif (!(str_display.toString() = )num1 *= Double.parseDouble(str_display.toString();str_display = new StringBuffer();if (!(str_result = null)num1 =

21、 Double.parseDouble(str_result);str_result = null;et_play.setText(String.valueOf(num1);flag = true;);bt_divide.setOnClickListener(new OnClickListener()Overridepublic void onClick(View v)str_oper = /;if (!b_div & !(str_display.toString() = )num1 = Double.parseDouble(str_display.toString();et_play.set

22、Text(String.valueOf(num1);str_display = new StringBuffer();b_div = true; elseif (!(str_display.toString() = )if (Double.parseDouble(str_display.toString() = 0)Toast.makeText(Android_calculatorActivity.this,除数不能为0！, Toast.LENGTH_LONG).show(); elsenum1 /= Double.parseDouble(str_display.toString();str_

23、display = new StringBuffer();if (!(str_result = null)num1 = Double.parseDouble(str_result);str_result = null;et_play.setText(String.valueOf(num1);flag = true;);bt_clear.setOnClickListener(new OnClickListener()Overridepublic void onClick(View v)str_oper = +;str_display = new StringBuffer();str_result

24、 = null;num1 = 0;num2 = 0;flag = true;b_sub = false;b_mul = false;b_div = false;et_play.setText(0.0););bt_equal.setOnClickListener(new OnClickListener()Overridepublic void onClick(View v)if (str_oper.equals(+)num2 = Double.parseDouble(str_display.toString();str_result = String.valueOf(num1 + num2);et_play.setText(str_result);str_display = new StringBuffer();if (str_oper.equals(-)num2 = Double.parseDouble(str_display.toString();str_result = String.valueOf(num1 - num2);et_play.setText(str_resu