Mobile Application Development Laboratory Experiment-3

Here I give full source code in Java and XML and Sample output with mobile application in .apk format.

EX.NO 3 Write an application that draws basic graphical primitives on the screen.

Aim:

To develop a Simple Android Application that draws basic Graphical Primitives on the screen.

Procedure:

Open android studio and create new project

Select our project in the project explorer

Go to res folder and select layout Double click the main xml file

Type the code for main.xml or drag and drop various components used in our program

Drag and drop relative layout and change its properties

Drag and drop image view and change its properties according to our programs

Screen layout can be viewed by clicking graphics layout tab

Include necessary files

Override OnCreate() function

Create Image view and initialize its using id of some components used in the xml program

Save the program

Run the program

Output can be viewed in the android emulator

PROGRAM:

XML CODING:

File Name: activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout android:layout_height="match_parent"
    android:layout_width="match_parent"
    xmlns:android="http://schemas.android.com/apk/res/android">
    <ImageView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/ImageView"/>
</RelativeLayout>

JAVA CODING:

File Name: MainActivity.java 

package com.example.experiment3;

import androidx.appcompat.app.AppCompatActivity;

import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.drawable.BitmapDrawable;
import android.os.Bundle;
import android.widget.ImageView;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //Creating a Bitmap
        Bitmap bg = Bitmap.createBitmap(720, 1280,
                Bitmap.Config.ARGB_8888);
        //Setting the Bitmap as background for the ImageView
        ImageView i = (ImageView) findViewById(R.id.ImageView);
        i.setBackgroundDrawable(new BitmapDrawable(bg));
        //Creating the Canvas Object
        Canvas canvas = new Canvas(bg);
        //Creating the Paint Object and set its color & TextSize
        Paint paint = new Paint();
        paint.setColor(Color.BLACK);
        paint.setTextSize(50);
        //To draw a Rectangle
        canvas.drawText("Rectangle", 420, 150, paint);
        canvas.drawRect(400, 200, 650, 700, paint);
        //To draw a Circle
        canvas.drawText("Circle", 120, 150, paint);
        canvas.drawCircle(200, 350, 150, paint);
        //To draw a Square
        canvas.drawText("Square", 120, 800, paint);
        canvas.drawRect(50, 850, 350, 1150, paint);
        //To draw a Line
        canvas.drawText("Line", 480, 800, paint);
        canvas.drawLine(520, 850, 520, 1150, paint);

    }
}

Output:

Result:

Thus a Simple Android Application that draws basic Graphical Primitives on the screen is developed and executed successfully.

Here I was attach my Mobile Application in .apk format.

Click on blow link: (Download the mobile app run in your mobile)

https://drive.google.com/file/d/1KIp-q2YrMIUR3WLLBVQvIDpxof-Aw009/view?usp=sharing

Any quires leave a comment , I will Try to answer soon.