This tutorial will teach you Student Marks Calculation Project in Android Studio step by step.
Input Student Name, Marks and Calculate the Total,avg,grade.when you calculate the grade you have to follow the Following Conditions.if the avg is greater than 50 grade will be pass other wise grade will be fail.
Design the UI Design
Android studio folder structure there is folder which is res this is the folder will help us to make a UI Design of the App.inside res folder you can see the layout folder if you expand the layout folder there is a file
activity_main.xml
in this file we will design App Layout i have design the registration UI design below.
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:gravity="center">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:gravity="center">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="30sp"
android:gravity="center"
android:text="@string/emptitle"
android:textSize="15dp"
android:textStyle="bold"
android:textColor="@color/colorPrimary"
/>
<ImageView
android:layout_width="200sp"
android:layout_height="100sp"
android:gravity="center"
android:src="@drawable/marks"
/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:gravity="center"
>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20sp"
android:text="@string/stname"
android:textSize="15sp"
android:textStyle="italic"
android:textColor="@color/colorAccent"
/>
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/stname"
android:textColor="@color/colorPrimary"
android:gravity="center"
/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:gravity="center"
>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="15sp"
android:text="@string/marks1"
android:textSize="15sp"
android:textStyle="italic"
android:textColor="@color/colorAccent"
/>
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/mark1"
android:textColor="@color/colorPrimary"
android:gravity="center"
/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:gravity="center"
>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="15sp"
android:text="@string/marks2"
android:textSize="15sp"
android:textStyle="italic"
android:textColor="@color/colorAccent"
/>
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/mark2"
android:textColor="@color/colorPrimary"
android:gravity="center"
/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:gravity="center"
>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20sp"
android:text="@string/marks3"
android:textSize="15sp"
android:textStyle="italic"
android:textColor="@color/colorAccent"
/>
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/mark3"
android:textColor="@color/colorPrimary"
android:gravity="center"
/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:gravity="center"
>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20sp"
android:text="@string/total"
android:textSize="15sp"
android:textStyle="italic"
android:textColor="@color/colorAccent"
/>
<EditText
android:id="@+id/total"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:textColor="@color/colorPrimary"
/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:gravity="center"
>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20sp"
android:text="@string/avg"
android:textSize="15sp"
android:textStyle="italic"
android:textColor="@color/colorAccent"
/>
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/avg"
android:textColor="@color/colorPrimary"
android:gravity="center"
/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:gravity="center"
>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20sp"
android:text="@string/grade"
android:textSize="15sp"
android:textStyle="italic"
android:textColor="@color/colorAccent"
/>
<EditText
android:id="@+id/grade"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:textColor="@color/colorPrimary"
/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:gravity="right"
>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/btnok"
android:textColor="#ffffff"
android:background="@color/colorPrimary"
android:id="@+id/btn1"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/btnclear"
android:textColor="#ffffff"
android:background="@color/colorAccent"
android:id="@+id/btn2"
/>
</LinearLayout>
</LinearLayout>
</LinearLayout>Inside the Value Folder we have to Make the App Style.
colors.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<color name="colorPrimary">#008577</color>
<color name="colorPrimaryDark">#00574B</color>
<color name="colorAccent">#D81B60</color>
</resources>
strings.xml
<resources>
<string name="app_name">Student Marks Calculation System</string>
<string name="emptitle">Student Marks Calculation System</string>
<string name="stname">Student Name</string>
<string name="marks1">Marks 1</string>
<string name="marks2">Marks 2</string>
<string name="marks3">Marks 3</string>
<string name="total">Total</string>
<string name="avg">Average</string>
<string name="grade">Grade</string>
<string name="btnok">Ok</string>
<string name="btnclear">Clear</string>
</resources>
style.xml
<resources>
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">@color/colorPrimary</item>
<item name="colorPrimaryDark">@color/colorPrimaryDark</item>
<item name="colorAccent">@color/colorAccent</item>
</style>
</resources>
MainActitity.java
package com.example.kobinath.myapplication;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
public class MainActivity extends AppCompatActivity {
EditText ed1,ed2,ed3,ed4,ed5,ed6,ed7;
Button btn1,btn2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ed1 = findViewById(R.id.stname);
ed2 = findViewById(R.id.mark1);
ed3 = findViewById(R.id.mark2);
ed4 = findViewById(R.id.mark3);
ed5 = findViewById(R.id.total);
ed6 = findViewById(R.id.avg);
ed7 = findViewById(R.id.grade);
btn1 = findViewById(R.id.btn1);
btn2 = findViewById(R.id.btn2);
btn1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
stmarks();
}
});
btn2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
clear();
}
});
}
public void stmarks()
{
int m1,m2,m3,tot;
double avg;
String grade;
m1 = Integer.parseInt(ed2.getText().toString());
m2 = Integer.parseInt(ed3.getText().toString());
m3 = Integer.parseInt(ed4.getText().toString());
tot = m1 + m2 + m3;
ed5.setText(String.valueOf(tot));
avg = tot/3;
ed6.setText(String.valueOf(avg));
if(avg > 75)
{
ed7.setText("A");
}
else if(avg > 65)
{
ed7.setText("B");
}
else if(avg > 55)
{
ed7.setText("C");
}
else if(avg > 40)
{
ed7.setText("S");
}
else
{
ed7.setText("Fail");
}
}
public void clear()
{
ed1.setText("");
ed2.setText("");
ed3.setText("");
ed4.setText("");
ed5.setText("");
ed6.setText("");
ed7.setText("");
ed1.requestFocus();
}
}