安卓开发的自制计算器源代码

这是本人自己用安卓编写的计算器，代码的优化可能有所问题，不过大家都在学习阶段，欢迎大家批评指正，还是上源码吧。

先来运行图

package com.example.nanchen.exam_1_1;

import android.content.DialogInterface;

import android.support.v7.app.AlertDialog;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.TextView;

public class MainActivity extends AppCompatActivity implements View.OnClickListener{

private Button btn0;

private Button btn1;

private Button btn2;

private Button btn3;

private Button btn4;

private Button btn5;

private Button btn6;

private Button btn7;

private Button btn8;

private Button btn9;

private Button btnAdd;

private Button btnSub;

private Button btnMul;

private Button btnDiv;

private Button btnDec;

private Button btnEqual;

private Button btnClear;

private Button btnBackSpace;

private TextView textView_result;

double num1 = 0,num2 = 0,result = 0;//定义存储结果和两个操作数

boolean isCheckEqu = false;//检测是否点击了等于

int op = 0;//定义运算符

boolean hasDec = false;

boolean hasOp = false;

@Override

protected void onCreate Bundle savedInstanceState

super.onCreate savedInstanceState;

setContentView yout.activity_main;

textView_result = TextView findViewById R.id.result;

btn0 = Button findViewById R.id.btn0;

btn1 = Button findViewById R.id.btn1;

btn2 = Button findViewById R.id.btn2;

btn3 = Button findViewById R.id.btn3;

btn4 = Button findViewById R.id.btn4;

btn5 = Button findViewById R.id.btn5;

btn6 = Button findViewById R.id.btn6;

btn7 = Button findViewById R.id.btn7;

btn8 = Button findViewById R.id.btn8;

btn9 = Button findViewById R.id.btn9;

btnAdd = Button findViewById R.id.btn10;

btnSub = Button findViewById R.id.btn11;

btnMul = Button findViewById R.id.btn12;

btnDiv = Button findViewById R.id.btn13;

btnDec = Button findViewById R.id.btn14;

btnEqual = Button findViewById R.id.btn15;

btnClear = Button findViewById R.id.clear;

btnBackSpace = Button findViewById R.id.backSpace;

btn0.setOnClickListener this;

btn1.setOnClickListener this;

btn2.setOnClickListener this;

btn3.setOnClickListener this;

btn4.setOnClickListener this;

btn5.setOnClickListener this;

btn6.setOnClickListener this;

btn7.setOnClickListener this;

btn8.setOnClickListener this;

btn9.setOnClickListener this;

btnAdd.setOnClickListener this;

btnSub.setOnClickListener this;

btnDec.setOnClickListener this;

btnDiv.setOnClickListener this;

btnEqual.setOnClickListener this;

btnMul.setOnClickListener this;

btnClear.setOnClickListener this;

btnBackSpace.setOnClickListener this;

@Override

public void onClick View v

switch v.getId

case R.id.btn0:

if isCheckEqu

textView_result.setText null;

isCheckEqu=false;

String myString0 =

textView_result.getText.toString;

if myString0.equals"0"

myString0 = "";