how to merge to two bitmap one over another

Question

I have two images and i want to save one bitmap image over another exactly at the same point where it is present i also move image using gesture .

public Bi         


        

Answer 1

you can combine two bitmaps i.e a bitmap on another bitmap as an overlay
try this below code:

 public Bitmap bitmapOverlayToCenter(Bitmap bitmap1, Bitmap overlayBitmap) {
        int bitmap1Width = bitmap1.getWidth();
        int bitmap1Height = bitmap1.getHeight();
        int bitmap2Width = overlayBitmap.getWidth();
        int bitmap2Height = overlayBitmap.getHeight();

        float marginLeft = (float) (bitmap1Width * 0.5 - bitmap2Width * 0.5);
        float marginTop = (float) (bitmap1Height * 0.5 - bitmap2Height * 0.5);

        Bitmap finalBitmap = Bitmap.createBitmap(bitmap1Width, bitmap1Height, bitmap1.getConfig());
        Canvas canvas = new Canvas(finalBitmap);
        canvas.drawBitmap(bitmap1, new Matrix(), null);
        canvas.drawBitmap(overlayBitmap, marginLeft, marginTop, null);
        return finalBitmap;
    }  

Answer 2

you can combine two bitmaps like this

public static Bitmap overlay(Bitmap bmp1, Bitmap bmp2) {
    Bitmap bmOverlay = Bitmap.createBitmap(bmp1.getWidth(), bmp1.getHeight(), bmp1.getConfig());
    Canvas canvas = new Canvas(bmOverlay);
    canvas.drawBitmap(bmp1, new Matrix(), null);
    canvas.drawBitmap(bmp2, 0, 0, null);
    return bmOverlay;
}