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Addition Application For Android

Introduction

 
Ninety percent of people use Android smartphones. I will show you how to create an addition application for Android using Android studio. Android is a kernel based operating system. It allows the user to modify the GUI components and source code.
 
Requirements
  • Android studio
  • Little bit of XML and JAVA Knowledge.
Download link (android studio) https://developer.android.com/studio/
 

Steps should be followed

 
Carefully follow my steps on how to create the addition application for android using android studio and I have included the source code below.
 
Step 1
 
Open Android studio start the new project.
 
Android studio 
 
Step 2
 
Put the application name and company domain. If you wish to use c++ for code the project, Include c++ support then click next.
 
Android studio 
 
Step 3
 
Select the android minimum SDK. After you chose the minimum SDK it will show approximate percentage of people who use that sdk then click next.
 
android minimum SDK 
 
Step 4
 
Choose the basic activity then click next
 
Add an Activity to Mobile 
 
Step 5
 
Put the activity name and layout name. Android studio basically takes the java class name from what you provide as the activity name.
 
Customize the Activity 
 
Step 6
 
Goto activity_layout.xml then click the text bottom. Into the activity_layout.xml copy and paste the below code.
 
activity_layout.xml code
  1. <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"  
  2.     android:id="@+id/relativeLayout1"  
  3.     android:layout_width="fill_parent"  
  4.     android:layout_height="fill_parent" >  
  5.   
  6.     <LinearLayout  
  7.         android:id="@+id/linearLayout1"  
  8.         android:layout_width="wrap_content"  
  9.         android:layout_height="wrap_content"  
  10.         android:layout_alignParentLeft="true"  
  11.         android:layout_alignParentRight="true"  
  12.         android:layout_alignParentTop="true" >  
  13.   
  14.         <TextView  
  15.             android:layout_width="wrap_content"  
  16.             android:layout_height="wrap_content"  
  17.             android:layout_gravity="center"  
  18.             android:text="ADDITION"  
  19.             android:textSize="20dp" >  
  20.   
  21.         </TextView>  
  22.     </LinearLayout>  
  23.     <LinearLayout  
  24.         android:id="@+id/linearLayout2"  
  25.         android:layout_width="wrap_content"  
  26.         android:layout_height="wrap_content"  
  27.         android:layout_alignParentLeft="true"  
  28.         android:layout_alignParentRight="true"  
  29.         android:layout_below="@+id/linearLayout1" >  
  30.         <TextView  
  31.             android:layout_width="wrap_content"  
  32.             android:layout_height="wrap_content"  
  33.             android:text="ENTER NO 1" >  
  34.         </TextView>  
  35.         <EditText  
  36.             android:layout_width="wrap_content"  
  37.             android:layout_height="wrap_content"  
  38.             android:layout_weight="0.20"  
  39.             android:id="@+id/edittext1"  
  40.             android:inputType="number">  
  41.         </EditText>  
  42.     </LinearLayout>  
  43.     <LinearLayout  
  44.         android:id="@+id/linearLayout3"  
  45.         android:layout_width="wrap_content"  
  46.         android:layout_height="wrap_content"  
  47.         android:layout_alignParentLeft="true"  
  48.         android:layout_alignParentRight="true"  
  49.         android:layout_below="@+id/linearLayout2" >  
  50.         <TextView  
  51.             android:layout_width="wrap_content"  
  52.             android:layout_height="wrap_content"  
  53.             android:text="ENTER NO 2" >  
  54.         </TextView>  
  55.         <EditText  
  56.             android:layout_width="wrap_content"  
  57.             android:layout_height="wrap_content"  
  58.             android:layout_weight="0.20"  
  59.             android:id="@+id/edittext2"  
  60.             android:inputType="number">  
  61.         </EditText>  
  62.     </LinearLayout>  
  63.     <LinearLayout  
  64.         android:id="@+id/linearLayout4"  
  65.         android:layout_width="wrap_content"  
  66.         android:layout_height="wrap_content"  
  67.         android:layout_alignParentLeft="true"  
  68.         android:layout_alignParentRight="true"  
  69.         android:layout_below="@+id/linearLayout3" >  
  70.   
  71.         <Button  
  72.             android:layout_width="wrap_content"  
  73.             android:id="@+id/button1"  
  74.             android:layout_height="wrap_content"  
  75.             android:text="Addition"  
  76.             android:layout_weight="0.50" />  
  77.   
  78.         <Button  
  79.             android:layout_width="wrap_content"  
  80.             android:id="@+id/button3"  
  81.             android:layout_height="wrap_content"  
  82.             android:text="subtraction"  
  83.             android:layout_weight="0.50" />  
  84.         <Button  
  85.             android:layout_width="wrap_content"  
  86.             android:id="@+id/button2"  
  87.             android:layout_height="wrap_content"  
  88.             android:text="CLEAR"  
  89.             android:layout_weight="0.50" />  
  90.     </LinearLayout>  
  91.     <View  
  92.         android:layout_height="2px"  
  93.         android:layout_width="fill_parent"  
  94.         android:layout_below="@+id/linearLayout4"  
  95.         android:background="#DDFFDD"/>  
  96. </RelativeLayout>  
Android studio
 
Step 7
 
This is our user interface of the application
 
Android studio user interface 
 
Step 8
 
Go to LayoutActivity.java then click the text bottom. Into the LayoutActivity.java copy and paste the below code. Do not replace your package name.
 
LayoutActivity.java code
  1. package ganeshannt.layout;  
  2.   
  3. import android.app.Activity;  
  4. import android.os.Bundle;  
  5. import android.view.View;  
  6. import android.view.View.OnClickListener;  
  7. import android.widget.Button;  
  8. import android.widget.EditText;  
  9. import android.widget.Toast;  
  10.   
  11. public class LayoutActivity extends Activity {  
  12.     /** Called when the activity is first created. */  
  13.     EditText txtData1,txtData2;  
  14.     float num1,num2,result1,result2;  
  15.     @Override  
  16.     public void onCreate(Bundle savedInstanceState)  
  17.     {  
  18.         super.onCreate(savedInstanceState);  
  19.         setContentView(R.layout.activity_layout);  
  20.   
  21.   
  22.         Button add = (Button) findViewById(R.id.button1);  
  23.         add.setOnClickListener(new OnClickListener()  
  24.         {  
  25.             public void onClick(View v)  
  26.             {  
  27.                 try  
  28.                 {  
  29.                     txtData1 = (EditText) findViewById(R.id.edittext1);  
  30.                     txtData2 = (EditText) findViewById(R.id.edittext2);  
  31.                     num1 = Float.parseFloat(txtData1.getText().toString());  
  32.                     num2 = Float.parseFloat(txtData2.getText().toString());  
  33.                     result1=num1+num2;  
  34.                     Toast.makeText(getBaseContext(),"ANSWER:"+result1,Toast.LENGTH_SHORT).show();  
  35.                 }  
  36.                 catch(Exception e)  
  37.                 {  
  38.                     Toast.makeText(getBaseContext(), e.getMessage(),  
  39.                             Toast.LENGTH_SHORT).show();  
  40.                 }  
  41.             }  
  42.         });  
  43.         Button sub = (Button) findViewById(R.id.button3);  
  44.         sub.setOnClickListener(new OnClickListener()  
  45.         {  
  46.   
  47.             public void onClick(View v)  
  48.             {  
  49.                 try  
  50.                 {  
  51.                     txtData1 = (EditText) findViewById(R.id.edittext1);  
  52.                     txtData2 = (EditText) findViewById(R.id.edittext2);  
  53.                     num1 = Float.parseFloat(txtData1.getText().toString());  
  54.                     num2 = Float.parseFloat(txtData2.getText().toString());  
  55.                     result2=num1-num2;  
  56.                     Toast.makeText(getBaseContext(),"ANSWER:"+result2,Toast.LENGTH_SHORT).show();  
  57.                 }  
  58.                 catch(Exception e)  
  59.                 {  
  60.                     Toast.makeText(getBaseContext(), e.getMessage(),  
  61.                             Toast.LENGTH_SHORT).show();  
  62.                 }  
  63.             }  
  64.         });  
  65.   
  66.         Button clear = (Button) findViewById(R.id.button2);  
  67.         clear.setOnClickListener(new OnClickListener()  
  68.         {  
  69.             public void onClick(View v)  
  70.             {  
  71.                 try  
  72.                 {  
  73.                     txtData1.setText("");  
  74.                     txtData2.setText("");  
  75.                 }  
  76.                 catch(Exception e)  
  77.                 {  
  78.                     Toast.makeText(getBaseContext(), e.getMessage(),  
  79.                             Toast.LENGTH_SHORT).show();  
  80.                 }  
  81.   
  82.   
  83.             }  
  84.         });  
  85.   
  86.     }  
  87. }  
Android studio
 
Step 9
 
Click the build bottom and make the project. Now your project compilation process is going on. It will show you any error found in your project 
 
Android project build 
 
Step 10
 
Click run bottom. Your emulator will  start then run your application.
 
Android emulator 
 
Deliverables
 
Here we have successfully created addition application for android using android studio
 
Android addition application
 
Android addition application 
 
Don’t forgot to like and follow me. If you have any doubts just comment below.


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