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<?xml version="1.0" encoding="utf-8"?>

<resources>

<color name="colorPrimary">#3F51B5</color>

<color name="colorPrimaryDark">#303F9F</color>

<color name="colorAccent">#FF4081</color>

<color name="white">#FFFFFF</color>

<color name="black">#000000</color>

<color name="zi">#FFFFFF</color>

<color name="gray">#BEBEBE</color>

<color name="green">#9AFF9A</color>

<color name="littlegreen">#F0FFFF</color>

</resources>

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<?xml version="1.0" encoding="utf-8"?>

<shape xmlns:android="http://schemas.android.com/apk/res/android">

<corners android:radius="5dp"/>

<solid

android:color="@color/white"/>

</shape>

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<?xml version="1.0" encoding="utf-8"?>

<selector xmlns:android="http://schemas.android.com/apk/res/android">

<item android:drawable="@color/littlegreen"

android:state_pressed="true"/>

<item android:drawable="@color/white" />

</selector>

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<?xml version="1.0" encoding="utf-8"?>

<selector xmlns:android="http://schemas.android.com/apk/res/android">

<item android:drawable="@color/white"

android:state_pressed="true"/>

<item android:drawable="@color/littlegreen" />

</selector>

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<?xml version="1.0" encoding="utf-8"?>

<LinearLayout

xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical"

android:background="@drawable/jisuanqi"

tools:context="com.example.administrator.calculate.MainActivity"

>

<LinearLayout

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:layout_marginTop="30dp"

android:paddingLeft="20dp"

android:paddingRight="20dp"

android:paddingTop="20dp">

<EditText

android:id="@+id/input"

android:layout_width="fill_parent"

android:layout_height="60dp"

android:background="@drawable/white"

android:editable="false"

android:gravity="right|bottom"

/>

</LinearLayout>

<LinearLayout

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:layout_marginTop="20dp"

android:orientation="horizontal"

android:gravity="center">

<Button

android:layout_width="65dp"

android:layout_height="65dp"

android:text="C"

android:background="@drawable/selector"

android:gravity="center"

android:textSize="25sp"

android:id="@+id/clear"

/>

<Button

android:layout_width="65dp"

android:layout_height="65dp"

android:text="←"

android:background="@drawable/selector"

android:gravity="center"

android:layout_marginLeft="10dp"

android:textSize="23sp"

android:id="@+id/delete"

/>

<Button

android:layout_width="65dp"

android:layout_height="65dp"

android:text="×"

android:background="@drawable/selector"

android:gravity="center"

android:layout_marginLeft="10dp"

android:textSize="25sp"

android:id="@+id/cheng"

/>

<Button

android:layout_width="65dp"

android:layout_height="65dp"

android:text="÷"

android:background="@drawable/selector"

android:gravity="center"

android:layout_marginLeft="10dp"

android:textSize="25sp"

android:id="@+id/clu"

/>

</LinearLayout>

<LinearLayout

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:layout_marginTop="20dp"

android:orientation="horizontal"

android:gravity="center">

<Button

android:layout_width="65dp"

android:layout_height="65dp"

android:text="7"

android:background="@drawable/selector"

android:gravity="center"

android:textSize="25sp"

android:id="@+id/num7"

/>

<Button

android:layout_width="65dp"

android:layout_height="65dp"

android:text="8"

android:background="@drawable/selector"

android:gravity="center"

android:layout_marginLeft="10dp"

android:textSize="25sp"

android:id="@+id/num8"

/>

<Button

android:layout_width="65dp"

android:layout_height="65dp"

android:text="9"

android:background="@drawable/selector"

android:gravity="center"

android:layout_marginLeft="10dp"

android:textSize="25sp"

android:id="@+id/num9"

/>

<Button

android:layout_width="65dp"

android:layout_height="65dp"

android:text="－"

android:background="@drawable/selector"

android:gravity="center"

android:layout_marginLeft="10dp"

android:textSize="25sp"

android:id="@+id/charjian"

/>

</LinearLayout>

<LinearLayout

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:layout_marginTop="20dp"

android:orientation="horizontal"

android:gravity="center">

<Button

android:layout_width="65dp"

android:layout_height="65dp"

android:text="4"

android:background="@drawable/selector"

android:gravity="center"

android:textSize="25sp"

android:id="@+id/num4"

/>

<Button

android:layout_width="65dp"

android:layout_height="65dp"

android:text="5"

android:background="@drawable/selector"

android:gravity="center"

android:layout_marginLeft="10dp"

android:textSize="25sp"

android:id="@+id/num5"

/>

<Button

android:layout_width="65dp"

android:layout_height="65dp"

android:text="6"

android:background="@drawable/selector"

android:gravity="center"

android:layout_marginLeft="10dp"

android:textSize="25sp"

android:id="@+id/num6"

/>

<Button

android:layout_width="65dp"

android:layout_height="65dp"

android:text="＋"

android:background="@drawable/selector"

android:gravity="center"

android:layout_marginLeft="10dp"

android:textSize="25sp"

android:id="@+id/charadd"

/>

</LinearLayout>

<LinearLayout

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:orientation="horizontal"

android:gravity="center_horizontal"

android:layout_marginTop="10dp"

>

<LinearLayout

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:orientation="vertical"

>

<LinearLayout

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:orientation="horizontal"

>

<Button

android:layout_width="65dp"

android:layout_height="65dp"

android:background="@drawable/selector"

android:text="1"

android:gravity="center"

android:textSize="25sp"

android:id="@+id/num1"

/>

<Button

android:layout_width="65dp"

android:layout_height="65dp"

android:text="2"

android:background="@drawable/selector"

android:gravity="center"

android:layout_marginLeft="10dp"

android:textSize="25sp"

android:id="@+id/num2"/>

<Button

android:layout_width="65dp"

android:layout_height="65dp"

android:text="3"

android:background="@drawable/selector"

android:gravity="center"

android:layout_marginLeft="10dp"

android:textSize="25sp"

android:id="@+id/num3"/>

</LinearLayout>

<LinearLayout

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:orientation="horizontal"

android:layout_marginTop="10dp">

<Button

android:id="@+id/num0"

android:layout_width="140dp"

android:layout_height="65dp"

android:text="0"

android:background="@drawable/selector"

android:gravity="center"

android:textSize="25sp" />

<Button

android:id="@+id/dian"

android:layout_width="65dp"

android:layout_height="65dp"

android:layout_marginLeft="10dp"

android:background="@drawable/selector"

android:gravity="center"

android:text="."

android:textSize="25sp" />

</LinearLayout>

</LinearLayout>

<LinearLayout

android:layout_width="wrap_content"

android:layout_height="wrap_content">

<Button

android:layout_width="65dp"

android:layout_height="140dp"

android:text="="

android:background="@drawable/equal"

android:gravity="center"

android:layout_marginLeft="10dp"

android:textSize="25sp"

android:id="@+id/equai"/>

</LinearLayout>

</LinearLayout>

</LinearLayout>

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package com.example.administrator.calculate;

import android.os.Bundle;

import android.support.v7.app.AppCompatActivity;

import android.view.View;

import android.widget.Button;

import android.widget.EditText;

import android.widget.LinearLayout;

import android.widget.Toast;

import butterknife.BindView;

import butterknife.ButterKnife;

import butterknife.OnClick;

public class MainActivity extends AppCompatActivity {

@BindView(R.id.input)

EditText input;

@BindView(R.id.clear)

Button clear;

@BindView(R.id.delete)

Button delete;

@BindView(R.id.cheng)

Button cheng;

@BindView(R.id.clu)

Button chu;

@BindView(R.id.num7)

Button num7;

@BindView(R.id.num8)

Button num8;

@BindView(R.id.num9)

Button num9;

@BindView(R.id.charjian)

Button charjian;

@BindView(R.id.num4)

Button num4;

@BindView(R.id.num5)

Button num5;

@BindView(R.id.num6)

Button num6;

@BindView(R.id.charadd)

Button charadd;

@BindView(R.id.num1)

Button num1;

@BindView(R.id.num2)

Button num2;

@BindView(R.id.num3)

Button num3;

@BindView(R.id.num0)

Button num0;

@BindView(R.id.dian)

Button dian;

@BindView(R.id.equai)

Button equal;

private String ss="";

private boolean fu=false;

private boolean num=false;

private boolean point=false;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

ButterKnife.bind(this);

}

@OnClick({R.id.clear, R.id.delete, R.id.cheng, R.id.clu, R.id.num7, R.id.num8, R.id.num9, R.id.charjian, R.id.num4, R.id.num5, R.id.num6, R.id.charadd, R.id.num1, R.id.num2, R.id.num3, R.id.num0, R.id.dian, R.id.equai})

public void onViewClicked(View view) {

switch (view.getId()) {

case R.id.clear:

{

ss="";

input.setText(ss);

}

break;

case R.id.delete:

{

if(ss.indexOf(" ")==ss.length()-3)

{

ss= ss.substring(0,ss.length() - 2);

}

if(ss.length()>0)

{

ss= ss.substring(0,ss.length() - 1);

}

input.setText(ss);

}

break;

case R.id.cheng:

{

if(ss.length()==0)

{

break;

}

if(ss.contains(" "))

{

if(ss.indexOf(" ")==ss.length()-3||ss.indexOf(" ")==ss.length()-2||ss.indexOf(" ")==ss.length()-1) break;

getResult();

}

fu=true;

ss+=" × ";

input.setText(ss);

}

break;

case R.id.clu:

{

if(ss.length()==0)

{

break;

}

if(ss.contains(" "))

{

if(ss.indexOf(" ")==ss.length()-3||ss.indexOf(" ")==ss.length()-2||ss.indexOf(" ")==ss.length()-1) break;

getResult();

}

fu=true;

ss+=" ÷ ";

input.setText(ss);

}

break;

case R.id.num7:

{

ss+="7";

input.setText(ss);

}

break;

case R.id.num8:

{

ss+="8";

input.setText(ss);

}

break;

case R.id.num9:

{

ss+="9";

input.setText(ss);

}

break;

case R.id.charjian:

{

if(ss.length()==0)

{

break;

}

if(ss.contains(" "))

{

if(ss.indexOf(" ")==ss.length()-3||ss.indexOf(" ")==ss.length()-2||ss.indexOf(" ")==ss.length()-1) break;

getResult();

}

fu=true;

ss+=" － ";

input.setText(ss);

}

break;

case R.id.num4:

{

ss+="4";

input.setText(ss);

}

break;

case R.id.num5:

{

ss+="5";

input.setText(ss);

}

break;

case R.id.num6:

{

ss+="6";

input.setText(ss);

}

break;

case R.id.charadd:

{

if(ss.length()==0)

{

break;

}

if(ss.contains(" "))

{

if(ss.indexOf(" ")==ss.length()-3||ss.indexOf(" ")==ss.length()-2||ss.indexOf(" ")==ss.length()-1) break;

getResult();

}

fu=true;

ss+=" ＋ ";

input.setText(ss);

}

break;

case R.id.num1:

{

ss+="1";

input.setText(ss);

}

break;

case R.id.num2:

{

ss+="2";

input.setText(ss);

}

break;

case R.id.num3:

{

ss+="3";

input.setText(ss);

}

break;

case R.id.num0:

{

ss+="0";

input.setText(ss);

}

break;

case R.id.dian:

{

if(ss.length()==0||ss.indexOf(" ")==ss.length()-3||ss.lastIndexOf(".")>ss.indexOf(" "))

{

break;

}

else

{

ss+=".";

input.setText(ss);

}

}

break;

case R.id.equai:

getResult();

break;

}

}

private void getResult()

{

double result=0;

if(ss==null||ss.equals("")) return;

if(!ss.contains(" ")) return;

String s1=ss.substring(0,ss.indexOf(" "));

String op=ss.substring(ss.indexOf(" ")+1,ss.indexOf(" ")+2);

String s2=ss.substring(ss.indexOf(" ")+3);

if(!s1.equals("")&&!s2.equals(""))

{

double d1=Double.parseDouble(s1);

double d2=Double.parseDouble(s2 );

switch (op)

{

case "＋": result=d1+d2;break;

case "－": result=d1-d2;break;

case "×": result=d1*d2;break;

case "÷":

{

if(d2==0)

{

Toast.makeText(this, "不能除以零", Toast.LENGTH_SHORT).show();

break;

}

result=d1/d2*1.0;

}

break;

}

int r = (int) result;

if(r==result)

{

input.setText(""+r);

ss=""+r;

}

else

{

input.setText(result+"");

ss=""+result;

}

}

}

}

1

android:theme=”@style/Theme.AppCompat.DayNight.NoActionBar”