android studio实现计算器

  • Z时代
  • 2024-01-10
  • 分类：IT

本文实例为大家分享了android studio实现计算器的具体代码，供大家参考，具体内容如下

效果图：

资源文件：

color.xml

<?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>

white.xml

设置input text的填充色为白色

<?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>

selector.xml

点击按钮时产生阴影效果

<?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>

equeal.xml

同理，等号的阴影效果

<?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>

布局文件

<?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>

java代码

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;
   }
  }
 }
}

在AndroidManifest.xml文件中activity 后面添加

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

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。

以上是 android studio实现计算器 的全部内容， 来源链接： utcz.com/p/240819.html

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