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Android Calorie Calculator – Stay on Top of Your Diet

https://projectgurukul.org/android-calorie-calculator/

Sudhanshi
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Android Calorie Calculator – Stay on Top of Your Diet

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  1. Android Calorie Calculator – Stay on Top of Your Diet An Android Calorie Calculator App can be very useful for people who are trying to maintain or lose weight. It helps individuals to determine the number of calories they need to consume daily to maintain or lose weight based on their gender, age, height, and weight.In this project, we will be creating a simple calorie calculator app using Android Studio. About Android Calorie Calculator The objective of this project is to create a simple calorie calculator app that can calculate the number of calories an individual needs to consume daily based on their gender, age, height, and weight. Prerequisite for Calorie Calculator using Android

  2. Before starting this project, you should have basic knowledge of Android Studio and Java programming language. You should also have Android Studio installed on your computer. Let’s get started! Download Android Calorie Calculator Project Please download the source code of Android Calorie Calculator Project: Android Calorie Calculator Project Code Steps to Create Calorie Calculator using Android Following are the steps for developing the Android Calorie Calculator Project: Step 1: Create a new project in Android Studio

  3. First, open Android Studio and create a new project. Give your project a name, choose the language as Java, and set the minimum SDK to 21 or higher. Click on the “Finish” button to create your new project. Step 2: Create the layout of the app In this step we will create the layout of the app. We will add the text fields for age, weight, and height. We will also add the radio buttons for selecting “Gender” because gender plays a significant role in the person’s daily calorie requirements of the calorie. Code for the Layout of the app activity_main.xml <?xml version="1.0" encoding="utf-8"?> <ScrollView xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto"

  4. xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@drawable/gradiant" android:orientation="vertical" tools:context=".MainActivity"> <LinearLayout android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <com.google.android.material.textview.MaterialTextView

  5. android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="10dp" android:layout_marginBottom="10dp" android:text="Calories Calculator" android:textAlignment="center" android:textAllCaps="true" android:textColor="@color/black" android:textSize="20sp" android:textStyle="bold" /> <LinearLayout

  6. android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal"> <com.google.android.material.textfield.TextInputLayout android:layout_width="0dp" android:layout_height="wrap_content" android:layout_margin="5dp" android:layout_weight="1" android:hint="Enter weight (kg)"> <com.google.android.material.textfield.TextInputEditText android:id="@+id/weight"

  7. android:layout_width="match_parent" android:layout_height="wrap_content" android:inputType="numberDecimal" /> </com.google.android.material.textfield.TextInputLayout> <com.google.android.material.textfield.TextInputLayout android:layout_width="0dp" android:layout_height="wrap_content" android:layout_margin="5dp" android:layout_weight="1" android:hint="Enter Height (cm)"> <com.google.android.material.textfield.TextInputEditText

  8. android:id="@+id/height" android:layout_width="match_parent" android:layout_height="wrap_content" android:inputType="numberDecimal" /> </com.google.android.material.textfield.TextInputLayout> </LinearLayout> <androidx.appcompat.widget.LinearLayoutCompat android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal"> <com.google.android.material.textfield.TextInputLayout

  9. android:layout_width="0dp" android:layout_height="wrap_content" android:layout_margin="5dp" android:layout_weight="1" android:hint="Enter Age"> <com.google.android.material.textfield.TextInputEditText android:id="@+id/age" android:layout_width="match_parent" android:layout_height="wrap_content" android:inputType="numberDecimal" /> </com.google.android.material.textfield.TextInputLayout>

  10. <RadioGroup android:id="@+id/gender" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_marginLeft="5dp" android:layout_marginTop="5dp" android:layout_marginRight="5dp" android:layout_weight="1" android:gravity="center" android:orientation="horizontal" android:paddingVertical="3dp">

  11. <com.google.android.material.radiobutton.MaterialRadioButton android:id="@+id/male" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Male " android:textAllCaps="true" android:textColor="@color/black" /> <com.google.android.material.radiobutton.MaterialRadioButton android:id="@+id/female" android:layout_width="wrap_content" android:layout_height="wrap_content"

  12. android:text="FEMALE" android:textAllCaps="true" /> </RadioGroup> </androidx.appcompat.widget.LinearLayoutCompat> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:gravity="center" android:orientation="horizontal"> <TextView

  13. android:id="@+id/calories" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginStart="10dp" android:layout_marginTop="20dp" android:layout_marginEnd="10dp" android:layout_marginBottom="20dp" android:fontFamily="sans-serif-black" android:gravity="center" android:text="Calorie" android:textAlignment="center"

  14. android:textAllCaps="true" android:textColor="@color/cardview_dark_background" android:textSize="50sp" android:textStyle="bold" /> <TextView android:id="@+id/text_dummy" android:layout_width="50dp" android:layout_height="70dp" android:layout_marginTop="20dp" android:layout_marginEnd="10dp" android:layout_marginBottom="20dp"

  15. android:fontFamily="sans-serif-black" android:gravity="center" android:text="calories required per day" android:textAlignment="center" android:textColor="@color/cardview_dark_background" android:textSize="10sp" android:textStyle="bold" android:visibility="gone" /> </LinearLayout> <RelativeLayout android:layout_width="match_parent"

  16. android:layout_height="wrap_content" android:layout_margin="5dp"> <TableLayout android:id="@+id/calorieTable" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_margin="10dp" android:background="@android:color/white"> <TableRow android:background="@drawable/gradiant2"> <TextView android:layout_width="0dp"

  17. android:layout_height="wrap_content" android:layout_weight="4" android:gravity="center" android:padding="10sp" android:text="@string/col1" android:textColor="@color/white" android:textSize="18sp" android:textStyle="bold" /> <TextView android:layout_width="0dp" android:layout_height="wrap_content"

  18. android:layout_weight="2" android:gravity="center" android:padding="10sp" android:text="Calories" android:textColor="@color/white" android:textSize="18sp" android:textStyle="bold" /> </TableRow> <TableRow android:background="@drawable/gradiant3"> <TextView android:layout_width="0dp"

  19. android:layout_height="wrap_content" android:layout_weight="4" android:gravity="center" android:padding="10sp" android:text="Sedentary: little or no exercise" android:textColor="@color/gray_Dark" android:textSize="14sp" android:textStyle="bold" /> <TextView android:id="@+id/textView1" android:layout_width="0dp"

  20. android:layout_height="wrap_content" android:layout_weight="2" android:gravity="center" android:padding="10sp" android:textColor="@color/gray_Dark" android:textSize="14sp" android:textStyle="bold" /> </TableRow> <TableRow android:background="@drawable/gradiant4"> <TextView android:layout_width="0dp"

  21. android:layout_height="wrap_content" android:layout_weight="4" android:gravity="center" android:padding="10sp" android:text="Exercise 1-3 times/week" android:textColor="@color/gray_Dark" android:textSize="14sp" android:textStyle="bold" /> <TextView android:id="@+id/textView2" android:layout_width="0dp"

  22. android:layout_height="wrap_content" android:layout_weight="2" android:gravity="center" android:padding="10sp" android:textColor="@color/gray_Dark" android:textSize="14sp" android:textStyle="bold" /> </TableRow> <TableRow android:background="@drawable/gradiant3"> <TextView android:layout_width="0dp"

  23. android:layout_height="wrap_content" android:layout_weight="4" android:gravity="center" android:padding="10sp" android:text="Exercise 4-5 times/week" android:textColor="@color/gray_Dark" android:textSize="14sp" android:textStyle="bold" /> <TextView android:id="@+id/textView3" android:layout_width="0dp"

  24. android:layout_height="wrap_content" android:layout_weight="2" android:gravity="center" android:padding="10sp" android:textColor="@color/gray_Dark" android:textSize="14sp" android:textStyle="bold" /> </TableRow> <TableRow android:background="@drawable/gradiant4"> <TextView android:layout_width="0dp"

  25. android:layout_height="wrap_content" android:layout_weight="4" android:gravity="center" android:padding="10sp" android:text="Intense exercise 3-4 times/week " android:textColor="@color/gray_Dark" android:textSize="14sp" android:textStyle="bold" /> <TextView android:id="@+id/textView4" android:layout_width="0dp"

  26. android:layout_height="wrap_content" android:layout_weight="2" android:gravity="center" android:padding="10sp" android:textColor="@color/gray_Dark" android:textSize="14sp" android:textStyle="bold" /> </TableRow> <TableRow android:background="@drawable/gradiant3"> <TextView android:layout_width="0dp"

  27. android:layout_height="wrap_content" android:layout_weight="4" android:gravity="center" android:padding="10sp" android:text="Intense exercise 6-7 times/week" android:textColor="@color/gray_Dark" android:textSize="14sp" android:textStyle="bold" /> <TextView android:id="@+id/textView5" android:layout_width="0dp"

  28. android:layout_height="wrap_content" android:layout_weight="2" android:gravity="center" android:padding="10sp" android:textColor="@color/gray_Dark" android:textSize="14sp" android:textStyle="bold" /> </TableRow> <TableRow android:background="@drawable/gradiant4"> <TextView android:layout_width="0dp"

  29. android:layout_height="wrap_content" android:layout_weight="4" android:gravity="center" android:padding="10sp" android:text="Very intense exercise daily" android:textColor="@color/gray_Dark" android:textSize="14sp" android:textStyle="bold" /> <TextView android:id="@+id/textView6" android:layout_width="0dp"

  30. android:layout_height="wrap_content" android:layout_weight="2" android:gravity="center" android:padding="10sp" android:textColor="@color/gray_Dark" android:textSize="14sp" android:textStyle="bold" /> </TableRow> </TableLayout> <TextView android:id="@+id/required"

  31. android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_below="@+id/calorieTable" android:layout_marginTop="10dp" android:layout_marginBottom="10dp" android:gravity="center" android:text="All Fields are Required" android:textColor="@color/gray_Dark" android:textSize="16sp" android:textStyle="bold" android:visibility="gone" />

  32. </RelativeLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_marginHorizontal="5dp" android:layout_marginBottom="10dp" android:layout_weight="4" android:gravity="center" android:orientation="horizontal"> <androidx.appcompat.widget.AppCompatButton

  33. android:id="@+id/calculate" android:layout_width="110dp" android:layout_height="50dp" android:layout_marginLeft="10dp" android:layout_marginRight="15dp" android:layout_weight="2" android:background="@drawable/gradiant6" android:onClick="calculate" android:text="Calculate" android:textSize="20sp" android:textStyle="bold"

  34. app:cornerRadius="10dp" /> <androidx.appcompat.widget.AppCompatButton android:id="@+id/reset" android:layout_width="110dp" android:layout_height="50dp" android:layout_marginRight="15dp" android:layout_weight="2" android:background="@drawable/gradiant5" android:onClick="reset" android:text="RESET" android:textSize="20sp"

  35. android:textStyle="bold" /> </LinearLayout> </LinearLayout> </ScrollView> Step 3: Handling the layout using activity. This will handle the button presses and update the content on the layout. Code for handling the layout MainActivity.java // Importing the required packages package com.projectgurukul.caloriecalculator; // Importing the required libraries

  36. import androidx.appcompat.app.AppCompatActivity; import androidx.appcompat.widget.AppCompatButton; import android.os.Bundle; import android.view.View; import android.widget.RadioGroup; import android.widget.TextView; import com.google.android.material.radiobutton.MaterialRadioButton; import com.google.android.material.textfield.TextInputEditText; import java.util.regex.Pattern; // Creating the main class and extending it with the AppCompatActivity class public class MainActivity extends AppCompatActivity {

  37. // Declaring the required variables private TextInputEditText age, height, weight; private RadioGroup gender; private MaterialRadioButton male, female; private TextView calories, required, textView1, textView2, textView3, textView4, textView5, textView6, text_dummy; private AppCompatButton calculate, reset; // Creating the onCreate method @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // Setting the content view to the activity_main.xml file

  38. setContentView(R.layout.activity_main); // Initializing the variables age = findViewById(R.id.age); height = findViewById(R.id.height); weight = findViewById(R.id.weight); gender = findViewById(R.id.gender); male = findViewById(R.id.male); female = findViewById(R.id.female); calories = findViewById(R.id.calories); textView1 = findViewById(R.id.textView1); textView2 = findViewById(R.id.textView2);

  39. textView3 = findViewById(R.id.textView3); textView4 = findViewById(R.id.textView4); textView5 = findViewById(R.id.textView5); textView6 = findViewById(R.id.textView6); text_dummy = findViewById(R.id.text_dummy); required = findViewById(R.id.required); calculate = findViewById(R.id.calculate); reset = findViewById(R.id.reset); // Creating the onClickListener for the reset button // This will reset all the values to the default values reset.setOnClickListener(v -> {

  40. age.setText(""); height.setText(""); weight.setText(""); gender.clearCheck(); calories.setText("Calories"); textView1.setText(""); textView2.setText(""); textView3.setText(""); textView4.setText(""); textView5.setText(""); textView6.setText("");

  41. text_dummy.setVisibility(View.GONE); required.setVisibility(View.GONE); }); // Creating the onClickListener for the calculate button calculate.setOnClickListener(v -> { // Getting the values from the text fields String ageText = age.getText().toString(); String heightText = height.getText().toString(); String weightText = weight.getText().toString(); // Creating the pattern for the regular expression // This will check if the value is a number or not

  42. Pattern pattern = Pattern.compile("[0-9]+"); // Creating the variables for the checks and setting them to false // These will be used to check if the values are empty or not boolean ageCheck = false; boolean heightCheck = false; boolean weightCheck = false; // Checking if the age text field is empty or not // If it is empty, then it will show an error message if(ageText.isEmpty()){ age.setError("Please enter your age"); age.requestFocus();

  43. ageCheck = false; } else if (!pattern.matcher(ageText).matches()) { age.setError("Please enter your age correctly"); age.requestFocus(); ageCheck = false; } else { age.setError(null); ageCheck = true; } // Checking if the height text field is empty or not // If it is empty, then it will show an error message

  44. if(heightText.isEmpty()){ height.setError("Please enter your height"); height.requestFocus(); heightCheck = false; } else if (!pattern.matcher(ageText).matches()) { age.setError("Please enter your age correctly"); age.requestFocus(); heightCheck = false; } else { height.setError(null); heightCheck = true;

  45. } // Checking if the weight text field is empty or not // If it is empty, then it will show an error message if(weightText.isEmpty()){ weight.setError("Please enter your weight"); weight.requestFocus(); weightCheck = false; } else if (!pattern.matcher(ageText).matches()) { age.setError("Please enter your age correctly"); age.requestFocus(); weightCheck = false;

  46. } else { weight.setError(null); weightCheck = true; } // Checking if the user has selected the gender or not if(gender.getCheckedRadioButtonId() == -1) { required.setText("Please Select Gender"); required.setVisibility(View.VISIBLE); } else { required.setText(""); required.setVisibility(View.GONE);

  47. // Checking if all the values are not empty if(ageCheck && heightCheck && weightCheck){ // Calling the calculateBMR method calculateCalorie(); } } }); } // Creating the calculate method to calculate the calories required public void calculateCalorie(){ // Getting the values from the text fields

  48. int ageValue = Integer.parseInt(age.getText().toString()); int heightValue = Integer.parseInt(height.getText().toString()); int weightValue = Integer.parseInt(weight.getText().toString()); // Creating the variable for the total calories double totalCalories = 0; if(gender.getCheckedRadioButtonId()== male.getId()){ // If user is "Male" then the following formula will be used to calculate the calories totalCalories = (10 * weightValue) + (6.25 * heightValue) - (5 * ageValue + 5); // Setting the text to the calories text view text_dummy.setVisibility(View.VISIBLE); } else {

  49. // If user is "Female" then the following formula will be used to calculate the calories totalCalories = (10 * weightValue) + (6.25 * heightValue) - (5 * ageValue - 161); calories.setText(String.format("%.2f", totalCalories)+"*"); text_dummy.setVisibility(View.VISIBLE); } // Setting the text to the calories in the table layout and rounding it to 2 decimal places textView1.setText(String.format("%.2f", totalCalories)+"*"); textView2.setText(String.format("%.2f", totalCalories*1.149)+"*"); textView3.setText(String.format("%.2f", totalCalories*1.220)+"*"); textView4.setText(String.format("%.2f", totalCalories*1.292)+"*"); textView5.setText(String.format("%.2f", totalCalories*1.437)+"*");

  50. textView6.setText(String.format("%.2f", totalCalories*1.583)+"*"); // Setting the text to the text view and making it visible required.setText("*"+"Calculation is based on the Mifflin-St Jeor Equation"); required.setTextSize(12); required.setVisibility(View.VISIBLE); } } Summary You have successfully created a calorie calculator app that allows users to calculate their daily calorie needs based on their age, gender, weight, and height. Congratulations on completing this task! Your app can help users make informed decisions about their diet and maintain a healthy lifestyle. Keep up the great work!

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