#SIMPLE #APPS #PROJECT #ANY #PRODUCT #BUY #SELL #PROFIT #PRICE #CALCULATE

ActivityMain.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">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:text="@string/cursit_price"
        android:textSize="20sp"/>

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="@string/buyingPrice"
        android:gravity="center"
        android:textSize="20sp"/>

    <EditText
        android:id="@+id/edBuy"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:autofillHints=""
        android:gravity="center"
        android:hint="@string/buying_price"
        android:inputType="number"
        android:textColorHint="#78909C"
        android:textSize="20sp" />

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="@string/sellPrice"
        android:gravity="center"
        android:textSize="20sp"/>

    <EditText
        android:id="@+id/edSell"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:autofillHints=""
        android:gravity="center"
        android:hint="@string/selling_price"
        android:textColorHint="#78909C"
        android:textSize="20sp"
        android:inputType="number" />

    <Button
        android:id="@+id/buttonCalculate"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:text="@string/account"
        android:textSize="20sp"/>

    <TextView
        android:id="@+id/tvDisplay"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text=""
        android:textSize="20sp"
        android:background="@drawable/profit"/>



</LinearLayout>

 MainActivity.java

 package com.example.buysalescalculate;

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 {

    EditText edBuy, edSell;
    Button buttonCalculate;
    TextView tvDisplay;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        edBuy = findViewById(R.id.edBuy);
        edSell = findViewById(R.id.edSell);
        buttonCalculate = findViewById(R.id.buttonCalculate);
        tvDisplay = findViewById(R.id.tvDisplay);

        buttonCalculate.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
               float byPrice, sellPrice, profit, profitPercent;

               String sBuy = edBuy.getText().toString();
               byPrice = Float.parseFloat(sBuy);

               String sSell = edSell.getText().toString();
               sellPrice = Float.parseFloat(sSell);

               profit = sellPrice - byPrice;
               profitPercent = profit/byPrice*100;

               tvDisplay.setText("Profit is: " +profit+ " \n profit Percentage is: " +profitPercent+ "%");
            }
        });

    }
}