How recursive bubble sort work

                                              Recursive Bubble Sort Base Case: If array size is 1, return. Do One Pass of normal Bubble Sort. This pass fixes last element of current subarray. Recur for all elements except last of current subarray. Example: Index=     0 1  2 3 4 5 6 7   100                          90 80 70 60 50 40 30  Array []= Suppose we want to sort the above in the increasing order by the recursive bubble sort. Make a get grater which will return the grater of the array. Compare the first and last element of the array if the first is greater than last the swap with each other. And again call the sort function and decrement the array size by 1; 1) 30                     90 80 70 60 50 40 100    ...
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simple calculator apps project in android studio

                                        calculator apps 







 

 

                                                          XML CODE 

<?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"

    android:orientation="vertical"

    android:padding="16dp"

    tools:context=".MainActivity">

  

    <TextView

        android:id="@+id/tvResult"

        android:layout_width="375dp"

        android:layout_height="137dp"

        android:background="#C8C8D6"

        android:hint="result"

        android:textSize="20dp" />

  

    <LinearLayout

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:orientation="horizontal"

        android:padding="10dp">

  

        <Button

            android:id="@+id/btnOne"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:background="#93939E"

            android:text="1"

            android:textSize="20dp" />

  

        <Button

            android:id="@+id/btnTwo"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:background="#93939E"

            android:text="2"

            android:textSize="20dp" />

  

        <Button

            android:id="@+id/btnThree"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:background="#93939E"

            android:text="3"

            android:textSize="20dp" />

  

        <Button

            android:id="@+id/btnPlus"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:background="#FD3636"

            android:text="+"

            android:textSize="20dp" />

    </LinearLayout>

  

    <LinearLayout

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:orientation="horizontal"

        android:padding="10dp"

        >

  

        <Button

            android:id="@+id/btnFour"

            android:background="#93939E"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:text="4"

            android:textSize="20dp"/>

  

        <Button

            android:id="@+id/btnFive"

            android:background="#93939E"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

  

            android:text="5"

            android:textSize="20dp"/>

  

        <Button

            android:id="@+id/btnSix"

            android:background="#93939E"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:text="6"

            android:textSize="20dp"/>

  

        <Button

            android:id="@+id/btnMinus"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:text="-"

            android:background="#FD3636"

            android:textSize="20dp"/>

    </LinearLayout>

    <LinearLayout

  

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:padding="10dp"

        android:orientation="horizontal">

  

        <Button

            android:id="@+id/btnSeven"

            android:background="#93939E"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:text="7"

            android:textSize="20dp"/>

  

        <Button

            android:id="@+id/btnEight"

            android:background="#93939E"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:text="8"

            android:textSize="20dp"/>

  

        <Button

            android:id="@+id/btnNine"

            android:background="#93939E"

            android:textSize="20dp"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:text="9" />

  

        <Button

            android:id="@+id/btnMultiply"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:text="x"

            android:background="#FD3636"

            android:textSize="20dp"/>

    </LinearLayout>

    <LinearLayout

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:orientation="horizontal"

        android:padding="10dp"

        android:textSize="20dp">

  

        <Button

            android:id="@+id/btnZero"

            android:background="#93939E"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:text="0"

            android:textSize="20dp"/>

  

        <Button

            android:id="@+id/btnEqual"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:text="="

            android:background="#C1FA1D"

            android:textSize="20dp"/>

  

        <Button

            android:id="@+id/btnDivider"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:textSize="20dp"

            android:background="#C1FA1D"

            android:text="/" />

  

        <Button

            android:textSize="20dp"

            android:id="@+id/btnMode"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:text="%"

            android:background="#C1FA1D"/>

    </LinearLayout>

  

    <Button

        android:id="@+id/btnClear"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:text="Clear"

  

        android:background="#F30B0B"/>

  

  

</LinearLayout>

 

 

 

 

 

                                                                 

 

 

 

 

                                                          JAVA CODE 

package com.example.calculateractivity;

  

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;

  

public class MainActivity extends AppCompatActivity {

    Button btnOne,btnTwo,btnThree,btnFour,btnFive,btnSix,btnSeven,btnEight,btnNine,btnZero;

    Button btnMode,btnPlus,btnMinus,btnMultiply,btnEqual,btnDivider;

    Button bntClear;

    TextView tvResult;

    boolean add,sub,div,mul,mod;

    double var1,var2;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        btnOne=findViewById(R.id.btnOne);

        btnDivider=findViewById(R.id.btnDivider);

        btnTwo=findViewById(R.id.btnTwo);

        btnThree=findViewById(R.id.btnThree);

        btnFour=findViewById(R.id.btnFour);

        btnFive=findViewById(R.id.btnFive);

        btnSix=findViewById(R.id.btnSix);

        btnSeven=findViewById(R.id.btnSeven);

        btnEight=findViewById(R.id.btnEight);

        btnEqual=findViewById(R.id.btnEqual);

        btnNine=findViewById(R.id.btnNine);

        btnZero=findViewById(R.id.btnZero);

        btnMinus=findViewById(R.id.btnMinus);

        btnMode=findViewById(R.id.btnMode);

        btnMultiply=findViewById(R.id.btnMultiply);

        btnPlus=findViewById(R.id.btnPlus);

        tvResult=findViewById(R.id.tvResult);

        bntClear=findViewById(R.id.btnClear);

  

        btnDivider.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

                  var1=Double.parseDouble(tvResult.getText()+"");

                  div=true;

                  tvResult.setText("");

            }

        });

  

        btnPlus.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

                var1=Double.parseDouble(tvResult.getText()+" ");

                add=true;

            tvResult.setText("");

            }

        });

        btnMinus.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

                var1=Double.parseDouble(tvResult.getText()+" ");

                sub=true;

                tvResult.setText("");

            }

        });

        btnMultiply.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

                var1=Double.parseDouble(tvResult.getText()+" ");

                mul=true;

                tvResult.setText("");

            }

        });

  

        btnMode.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

                var1=Double.parseDouble(tvResult.getText()+" ");

                mod=true;

                tvResult.setText("");

            }

        });

        btnEqual.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

                var2=Double.parseDouble(tvResult.getText()+"");

                if (add == true)

                {

                    tvResult.setText(var1+var2 + " ");

                    add=false;

                }

                if (add == true)

                {

                    tvResult.setText(var1+var2 + "");

                    add=false;

                }

                if (sub == true)

                {

                    tvResult.setText(var1-var2 + " ");

                    sub=false;

                }

                if (mul == true)

                {

                    tvResult.setText(var1*var2 + " ");

                    mul=false;

                }

  

                if (mod == true)

                {

                    tvResult.setText(var1%var2 + " ");

                    mod=false;

                }

            }

        });

        btnOne.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

                tvResult.setText(tvResult.getText().toString() +"1");

            }

        });

        btnTwo.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

                tvResult.setText(tvResult.getText().toString() +"1");

            }

        });

        btnTwo.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

                tvResult.setText(tvResult.getText().toString() +"1");

            }

        });

        btnTwo.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

                tvResult.setText(tvResult.getText().toString() +"2");

            }

        });

        btnThree.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

                tvResult.setText(tvResult.getText().toString() +"3");

            }

        });

        btnFour.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

                tvResult.setText(tvResult.getText().toString() +"4");

            }

        });

        btnFive.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

                tvResult.setText(tvResult.getText().toString() +"5");

            }

        });

        btnSix.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

                tvResult.setText(tvResult.getText().toString() +"6");

            }

        });

        btnSeven.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

                tvResult.setText(tvResult.getText().toString() +"7");

            }

        });

        btnEight.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

                tvResult.setText(tvResult.getText().toString() +"8");

            }

        });

        btnNine.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

                tvResult.setText(tvResult.getText().toString() +"9");

            }

        });

        btnZero.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

                tvResult.setText(tvResult.getText().toString() +"0");

            }

        });

        bntClear.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

                tvResult.setText("");

            }

        });

  

    }

}

 

 

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