Lottery application in Android Studio

In this blog we create a Lottery application in Android Studio that simulates a lottery game. The application​​ allows​​ the player to type a​​ number to generate five numbers and one red ball. The constructor will​​ use the Random class to generate a random number in the range of 1 through 69 for the red ball 1 through 26.​​ 

Download Android Studio from the link given blow according to your operating system Windows, Mac, Linux, Chrome OS etc.

Link:​​ https://developer.android.com/studio

More downloads are available here.​​ 

Link:​​ https://developer.android.com/studio/archive

For this application we are using the API 16 and an empty activity naming the activity as MainActivity we choose finish:

Firstly we will design the user interface after that we will go for MainActivity.java.

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

<LinearLayout

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

    android:layout_width="match_parent"

    android:layout_height="match_parent">

    android:orientation="vertical"

// you can add any kind of logo if you want by changing from android view to project view//

// add the required fields i.e. text field, button from design, and go to text to edit the texts//

<TextView

        android:layout_height="wrap_content"

        android:layout_width="match_parent"

        android:layout_marginLeft="4dp"

        android:layout_marginRight="4dp"

        android:textSize="36sp"

        android:layout_marginTop="3pt"

        android:string="@string/Lottery"

        android:gravity="center_horizontal"

        android:fontFamily=”casual” />

   

   

<LinearLayout

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:id="@+id/linearLayout1"

        android:layout_marginLeft="16dp"

        android:layout_marginRight="16dp"

        android:layout_marginTop="3pt">

        <Textview

            android:layout_weight="1"

            android:layout_height="wrap_content"

            android:layout_marginRight="5pt"

            android:id="@+id/firstnumber"

            android:layout_width="match_parent"

            android:inputType="numberDecimal">

                        android:text="01" />

                <Textview

            android:layout_weight="1"

            android:layout_height="wrap_content"

            android:layout_marginRight="5pt"

            android:id="@+id/secondnumber"

            android:layout_width="match_parent"

            android:inputType="numberDecimal">

                        android:text="02" />

       

       <Textview

            android:layout_weight="1"

            android:layout_height="wrap_content"

            android:layout_marginRight="5pt"

            android:id="@+id/thirdnumber"

            android:layout_width="match_parent"

            android:inputType="numberDecimal">

                        android:text="03" />

        <Textview

            android:layout_weight="1"

            android:layout_height="wrap_content"

            android:layout_marginRight="5pt"

            android:id="@+id/fourthnumber"

            android:layout_width="match_parent"

            android:inputType="numberDecimal">

                        android:text="04" />

        <Textview

            android:layout_weight="1"

            android:layout_height="wrap_content"

            android:layout_marginRight="5pt"

            android:id="@+id/fifthnumber"

            android:layout_width="match_parent"

            android:inputType="numberDecimal">

                        android:text="05" />

        <Textview

            android:layout_weight="1"

            android:layout_height="wrap_content"

            android:layout_marginRight="5pt"

            android:id="@+id/power_ball"

            android:layout_width="match_parent"

            android:inputType="numberDecimal">

                        android:text="06" />

// you can add the text size, color, other alignment also as per your requirement //

    </LinearLayout>

         

      <view

            android:layout_height="80dp"

            android:layout_width="wrap_content" />

           

<Button

            android:layout_height="wrap_content"

            android:layout_width="wrap_content"

            android:layout_gravity="center"

            android:layout_weight="1"

            android:textSize="8pt"

            android:text="@string/Generate">

            android:background=”@color/red”

            android:id=”[email protected]/generateButton”

        </Button>

[Remember:

In the resource provide string name

<string name = “generate”>Generate</string>

When this button will be pressed it will generate random value

]

   

MainActivity.java

package com.lottery;

public class MainActivity extends AppCompatActivity

{

//we have to declare/ referral all the variables to java, so that if any changes occurs to the variable it should also get reflected to the layout.//

private TextView mfirstnumber, msecondnumber, mthirdnumber, mfourthnumber, mfifthnumber, mpower_ball;

private Button mgenerateButton;

  private String[] lotteryBalls = {

“1”,”2”,”3”,”4”,”5”,”6”,”7”,”8”,”9”,”10”,”11”,”12”,”13”,”14”,”15”,”16”,
“17”,”18”,”19”,”20”,”21”,”22”,”23”

}

//make it upto 69 as per your requirement

float result_num;

int num1, num2;

@Override

  public void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    setContentView(R.layout.MainActivity);

    bindViews();

    generateRandomNumber();

    mgenerateButton.setOnClickListener(new onOnClickListener(){

      public void onClick(View view){

      generateRandomNumber();

      }

});

}

     

      private void generateRandomNumber(){

           collections.shuffle(Arrays.asList(lotteryBalls));

           mfirstnumber.setText(lotteryBalls[0]);

           msecondnumber.setText(lotteryBalls[1]);   

           mthirdnumber.setText(lotteryBalls[2]);

      mfourthnumber.setText(lotteryBalls[3]);

      mfifthnumber.setText(lotteryBalls[4]);

Random rand = new Random();

int power_balls= (rand. nextInt(10)+1)

mpower_balls.setText(power_balls + “” );

}

      private void bindViews(){

            mfirstnumber = (Textview)findviewbyId(R.id.firstnumber);

            msecondnumber = (Textview)findviewbyId(R.id.secondnumber);

            mthirdnumber = (Textview)findviewbyId(R.id.thirdnumber);

            mfourthnumber = (Textview)findviewbyId(R.id.fourthnumber);

            mfifthnumber = (Textview)findviewbyId(R.id.fifthnumber);

            mpower_ball = (Textview)findviewbyId(R.id.power_ball);

            mgenerateButton = (Button)findviewbyId(R.id.generatebutton);

    

    

}

//SAVE ALL THE CHANGES AND RUN THE APPLIACTION//