combineImages

Combine two images and draw new Image Java Code.

import java.io.File;
import java.awt.Color;
import java.awt.Graphics2D;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;


public class Main {
    public static void main(String args[]) throws Exception {
        BufferedImage img1 = ImageIO.read(new File("1.jpg"));
        BufferedImage img2 = ImageIO.read(new File("2.jpg"));
        BufferedImage joinedImg = combineImage(img1, img2);
        ImageIO.write(joinedImg, "png", new File("combined.png"));
    }

public static BufferedImage combineImage(BufferedImage img1, BufferedImage img2) {
        int offset = 2;
        int width = Math.min(img1.getWidth(), img2.getWidth()) + offset;
        int height = img1.getHeight()+ img2.getHeight() +offset;
        BufferedImage outImage = new BufferedImage(width, height,
                BufferedImage.TYPE_INT_ARGB);
        Graphics2D g2D = newImage.createGraphics();
        Color imgColor = g2D.getColor();
        g2D.setPaint(Color.BLACK);
        g2D.fillRect(0, 0, width, height);
        g2D.setColor(imgColor);
        g2D.drawImage(img1, null, 0, 0);
        g2D.drawImage(img2,null,0,img1.getHeight()+offset);
        g2D.dispose();
        return outImage;
    }
}

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Combine two images and draw new Image Android Code.

public void combineImage(Context context) {
    int offset = 2;
    File sdcard = Environment.getExternalStorageDirectory();
   
    File dir = new File(sdcard.getAbsolutePath() + "/path/");
    Bitmap topImage = BitmapFactory.decodeFile(dir + "/img1.JPG");
    Bitmap bottomImage = BitmapFactory.decodeFile(dir + "/img2.JPG");
   
    int width = Math.min(topImage.getWidth(), bottomImage.getWidth()) + offset;
    int height = topImage.getHeight() + bottomImage.getHeight() + offset;
   
    Bitmap mutableBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);

    Canvas comboImage = new Canvas(mutableBitmap);

    Paint paint = new Paint();

    comboImage.drawBitmap(topImage, 0, 0, paint);
    comboImage.drawBitmap(bottomImage, 0, topImage.getHeight(), paint);
   
    OutputStream os = null;
    try {
        os = new FileOutputStream(new File(dir, "output.JPG"));
        mutableBitmap.compress(Bitmap.CompressFormat.JPEG, 50, os);
        os.flush();
        os.close();
    } catch (Exception e) {
        e.printStackTrace();
    }
}