Need help to edit the code below. Am using it play a lottery game in Android...
Need help to edit the code below. Am using it play a lottery game in Android Studio what i need help with is if play one game u need to clear it up before u could another game.
Here is my activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="simpleapps.my.lotteryapplication.MainActivity"
android:orientation="vertical"
android:layout_margin="10dp"
android:weightSum="100">
<TextView
android:layout_width="match_parent"
android:layout_height="0dp"
android:text="Enter White Balls : "
android:textColor="#000000"
android:textSize="22sp"
android:layout_weight="15"
/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:orientation="horizontal"
android:weightSum="100"
android:layout_margin="10dp"
android:layout_weight="15">
<EditText
android:id="@+id/wBall1"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="20"
android:inputType="number"/>
<EditText
android:id="@+id/wBall2"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="20"
android:inputType="number"/>
<EditText
android:id="@+id/wBall3"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="20"
android:inputType="number"/>
<EditText
android:id="@+id/wBall4"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="20"
android:inputType="number"/>
<EditText
android:id="@+id/wBall5"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="20"
android:inputType="number"/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:orientation="horizontal"
android:weightSum="100"
android:layout_weight="15">
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:text="Enter Red Ball : "
android:textSize="22sp"
android:textColor="#000000"
android:layout_weight="60"/>
<EditText
android:id="@+id/rBall"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="30"
android:inputType="number"/>
</LinearLayout>
<Button
android:id="@+id/winBtn"
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_weight="15"
android:layout_gravity="center"
android:text="Winning Numbers"
/>
<TextView
android:id="@+id/wResult"
android:layout_width="match_parent"
android:layout_height="0dp"
android:text="White Balls : "
android:textColor="#000000"
android:textSize="20sp"
android:layout_marginTop="20dp"
android:layout_weight="15"/>
<TextView
android:id="@+id/rResult"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_marginTop="20dp"
android:text="Red Ball : "
android:textColor="#000000"
android:textSize="20sp"
android:layout_weight="15"/>
</LinearLayout>
Here is the MainActivity.java code below
package com.believe.lotteryapplication;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.Random;
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private EditText wBall1, wBall2, wBall3, wBall4, wBall5, rBall;
private TextView wResult, rResult;
private Button winBtn;
private Random ran ;
private ArrayList winningWhiteBalls;
private int winningRedBall;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ran = new Random();
winBtn = findViewById(R.id.winBtn);
wBall1 = findViewById(R.id.wBall1);
wBall2 = findViewById(R.id.wBall2);
wBall3 = findViewById(R.id.wBall3);
wBall4 = findViewById(R.id.wBall4);
wBall5 = findViewById(R.id.wBall5);
rBall = findViewById(R.id.rBall);
wResult = findViewById(R.id.wResult);
rResult = findViewById(R.id.rResult);
winBtn.setOnClickListener(this);
}
private void generateWinningNumbers()
{
winningWhiteBalls = new ArrayList<>();
for(int i=0;i<5;)
{
int num = ran.nextInt(70)+1;
if(!winningWhiteBalls.contains(num))
{
winningWhiteBalls.add(num);
i++;
}
}
winningRedBall = ran.nextInt(25)+1;
}
@Override
public void onClick(View v) {
int wball1,wball2,wball3,wball4,wball5, rball;
ArrayList allowedNumbers = new ArrayList<>();
for(int i=1;i<70;i++)
allowedNumbers.add(i);
wball1 = Integer.parseInt(wBall1.getText().toString());
wball2 = Integer.parseInt(wBall2.getText().toString());
wball3 = Integer.parseInt(wBall3.getText().toString());
wball4 = Integer.parseInt(wBall4.getText().toString());
wball5 = Integer.parseInt(wBall5.getText().toString());
rball = Integer.parseInt(rBall.getText().toString());
boolean validNumbers = true;
if(!allowedNumbers.contains(wball1))
validNumbers = false;
else
allowedNumbers.remove(new Integer(wball1));
if(!allowedNumbers.contains(wball2))
validNumbers = false;
else
allowedNumbers.remove(new Integer(wball2));
if(!allowedNumbers.contains(wball3))
validNumbers = false;
else
allowedNumbers.remove(new Integer(wball3));
if(!allowedNumbers.contains(wball4))
validNumbers = false;
else
allowedNumbers.remove(new Integer(wball4));
if(!allowedNumbers.contains(wball5))
validNumbers = false;
else
allowedNumbers.remove(new Integer(wball5));
if(rball < 1 || rball > 25)
validNumbers = false;
if(!validNumbers)
Toast.makeText(getApplicationContext(),"Invalid number(s) selected",Toast.LENGTH_SHORT).show();
else {
generateWinningNumbers();
for (int i = 0; i < winningWhiteBalls.size(); i++)
wResult.setText(wResult.getText().toString() + " " + winningWhiteBalls.get(i));
rResult.setText(rResult.getText().toString() + " " + winningRedBall);
}
}
}
Homework Answers
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity"
android:orientation="vertical"
android:layout_margin="10dp"
android:weightSum="100">
<TextView
android:layout_width="match_parent"
android:layout_height="0dp"
android:text="Enter White Balls : "
android:textColor="#000000"
android:textSize="22sp"
android:layout_weight="15"
/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:orientation="horizontal"
android:weightSum="100"
android:layout_margin="10dp"
android:layout_weight="15">
<EditText
android:id="@+id/wBall1"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="20"
android:inputType="number"/>
<EditText
android:id="@+id/wBall2"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="20"
android:inputType="number"/>
<EditText
android:id="@+id/wBall3"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="20"
android:inputType="number"/>
<EditText
android:id="@+id/wBall4"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="20"
android:inputType="number"/>
<EditText
android:id="@+id/wBall5"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="20"
android:inputType="number"/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:orientation="horizontal"
android:weightSum="100"
android:layout_weight="15">
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:text="Enter Red Ball : "
android:textSize="22sp"
android:textColor="#000000"
android:layout_weight="60"/>
<EditText
android:id="@+id/rBall"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="30"
android:inputType="number"/>
</LinearLayout>
<Button
android:id="@+id/winBtn"
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_weight="15"
android:layout_gravity="center"
android:text="Winning Numbers"
/>
<!--Created a new button called play again-->
<!--make it invisible first-->
<!--visible only after winBtn is clicked-->
<Button
android:id="@+id/playAgainBtn"
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_weight="15"
android:layout_gravity="center"
android:text="Play Again"
android:visibility="invisible"
/>
<TextView
android:id="@+id/wResult"
android:layout_width="match_parent"
android:layout_height="0dp"
android:text="White Balls : "
android:textColor="#000000"
android:textSize="20sp"
android:layout_marginTop="20dp"
android:layout_weight="15"/>
<TextView
android:id="@+id/rResult"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_marginTop="20dp"
android:text="Red Ball : "
android:textColor="#000000"
android:textSize="20sp"
android:layout_weight="15"/>
</LinearLayout>
MainActivity.java
package com.believe.lotteryapplication;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.Random;
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private EditText wBall1, wBall2, wBall3, wBall4, wBall5, rBall;
private TextView wResult, rResult;
private Button winBtn;
private Random ran ;
private ArrayList winningWhiteBalls;
private int winningRedBall;
//new button to play again
private Button playAgain;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ran = new Random();
winBtn = findViewById(R.id.winBtn);
wBall1 = findViewById(R.id.wBall1);
wBall2 = findViewById(R.id.wBall2);
wBall3 = findViewById(R.id.wBall3);
wBall4 = findViewById(R.id.wBall4);
wBall5 = findViewById(R.id.wBall5);
rBall = findViewById(R.id.rBall);
wResult = findViewById(R.id.wResult);
rResult = findViewById(R.id.rResult);
winBtn.setOnClickListener(this);
//play again button
playAgain=findViewById(R.id.playAgainBtn);
//when it is clicked
//clear all user input and game output
//also hide play again button and
//show winning number button
playAgain.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//clear everything
//clear the white ball text box
wBall1.setText("");
wBall2.setText("");
wBall3.setText("");
wBall4.setText("");
wBall5.setText("");
//clear the red ball text box
rBall.setText("");
//clear the results
wResult.setText("White Balls : ");
rResult.setText("Red Balls : ");
//hide play again button
playAgain.setVisibility(View.GONE);
//show the winning number button
winBtn.setVisibility(View.VISIBLE);
}
});
}
private void generateWinningNumbers()
{
winningWhiteBalls = new ArrayList<>();
for(int i=0;i<5;)
{
int num = ran.nextInt(70)+1;
if(!winningWhiteBalls.contains(num))
{
winningWhiteBalls.add(num);
i++;
}
}
winningRedBall = ran.nextInt(25)+1;
}
@Override
public void onClick(View v) {
int wball1,wball2,wball3,wball4,wball5, rball;
ArrayList allowedNumbers = new ArrayList<>();
for(int i=1;i<70;i++)
allowedNumbers.add(i);
//check first , whether the edit text box has any value
//to avoid application crash on clicking the winning numbers button when no value is entered
if(wBall1.getText().toString().length()==0||
wBall2.getText().toString().length()==0||
wBall3.getText().toString().length()==0||
wBall4.getText().toString().length()==0||
wBall5.getText().toString().length()==0||
rBall.getText().toString().length()==0){
//Inform user that the boxes are empty
Toast.makeText(this,"Please enter the values",Toast.LENGTH_LONG).show();
}
else {
wball1 = Integer.parseInt(wBall1.getText().toString());
wball2 = Integer.parseInt(wBall2.getText().toString());
wball3 = Integer.parseInt(wBall3.getText().toString());
wball4 = Integer.parseInt(wBall4.getText().toString());
wball5 = Integer.parseInt(wBall5.getText().toString());
rball = Integer.parseInt(rBall.getText().toString());
boolean validNumbers = true;
if (!allowedNumbers.contains(wball1))
validNumbers = false;
else
allowedNumbers.remove(new Integer(wball1));
if (!allowedNumbers.contains(wball2))
validNumbers = false;
else
allowedNumbers.remove(new Integer(wball2));
if (!allowedNumbers.contains(wball3))
validNumbers = false;
else
allowedNumbers.remove(new Integer(wball3));
if (!allowedNumbers.contains(wball4))
validNumbers = false;
else
allowedNumbers.remove(new Integer(wball4));
if (!allowedNumbers.contains(wball5))
validNumbers = false;
else
allowedNumbers.remove(new Integer(wball5));
if (rball < 1 || rball > 25)
validNumbers = false;
if (!validNumbers)
Toast.makeText(getApplicationContext(), "Invalid number(s) selected", Toast.LENGTH_SHORT).show();
else {
generateWinningNumbers();
for (int i = 0; i < winningWhiteBalls.size(); i++)
wResult.setText(wResult.getText().toString() + " " + winningWhiteBalls.get(i));
rResult.setText(rResult.getText().toString() + " " + winningRedBall);
//make the play again button visible
playAgain.setVisibility(View.VISIBLE);
//make the winning numbers button invisible
winBtn.setVisibility(View.GONE);
}
}//end of else
}
}
Output
//output when no values are entered
//output when values are entered
//Output when play again button is clicked
Screenshots
Add Answer to:
Need help to edit the code below. Am using it play a
lottery game in Android...
Need help to edit the code below. Am using it play a lottery game in Android...
Need help to edit the code below. Am using it play a lottery game in Android Studio what i need help with is if play one game u need to clear it up before u could another game. Here is my activity_main.xml <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="simpleapps.my.lotteryapplication.MainActivity" android:orientation="vertical" android:layout_margin="10dp" android:weightSum="100"> <TextView android:layout_width="match_parent" android:layout_height="0dp" android:text="Enter White Balls : " android:textColor="#000000" android:textSize="22sp" android:layout_weight="15" /> <LinearLayout android:layout_width="match_parent" android:layout_height="0dp" android:orientation="horizontal" android:weightSum="100" android:layout_margin="10dp" android:layout_weight="15"> <EditText android:id="@+id/wBall1" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="20" android:inputType="number"/>...
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