Overlay Images In Android

I have two images that I want to merge into one. (Eg 'House.png' on top of 'street.png') How do i achieve this in Android? I just want to merge the images and export them to a file

Solution 1:

I'd try something like:

publicstatic Bitmap mergeImages(Bitmap bottomImage, Bitmap topImage) {
    finalBitmapoutput= Bitmap.createBitmap(bottomImage.getWidth(), bottomImage
            .getHeight(), Config.ARGB_8888);
    finalCanvascanvas=newCanvas(output);
    finalPaintpaint=newPaint();
    paint.setAntiAlias(true);

    canvas.drawBitmap(bottomImage, 0, 0, paint);
    canvas.drawBitmap(topImage, 0, 0, paint);

    return output;
}

(not tested, I just wrote it here, might be some simple errors in there)

Basically what you do is create a 3rd empty bitmap, draw the bottom image on it and then draw the top image over it.

As for saving to a file, here are a few examples: Save bitmap to location

Solution 2:

You can do like this...............

public Bitmap Overlay(Bitmap Bitmap1, Resources paramResources, Bitmap Bitmap2, int alpha)
    {
      Bitmapbmp1= Bitmap.createScaledBitmap(Bitmap2, Bitmap1.getWidth(), Bitmap1.getHeight(), true);
      Bitmapbmp2= Bitmap.createBitmap(Bitmap1.getWidth(), Bitmap1.getHeight(), Bitmap1.getConfig());
      PaintlocalPaint=newPaint();
      localPaint.setAlpha(alpha);
      CanvaslocalCanvas=newCanvas(bmp2);
      MatrixlocalMatrix=newMatrix();
      localCanvas.drawBitmap(Bitmap1, localMatrix, null);
      localCanvas.drawBitmap(bmp1, localMatrix, localPaint);
      bmp1.recycle();
      System.gc();
      return bmp2;
    }