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  1. PO
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    <p>I wrote some thing simple for you. It is a view with canvas buffer, that have combine method. It draw images on buffer and display them. Your application need to have two views, <code>CombineImages</code> and the view your user is currently moving. Once he set it's position you call the CombineImages.combine to add that image to your view and than you can delete that image, you are ready now to add another image.</p> <p>Currently I place all the images to top left, you should edit my code a bit to make this work with costume positions. </p> <p>Also note that it is safe to call <code>CombineImages.combine</code> not from UI-Thread</p> <pre><code> public class CombineImages extends View{ private Bitmap buffer; private Canvas canvas; private Matrix matrix = new Matrix(); public CombineImages(Context context, AttributeSet attrs) { super(context, attrs); } public CombineImages(Context context) { super(context); } public void combine(ImageView imageView){ Bitmap bitmap = ((BitmapDrawable)imageView.getDrawable()).getBitmap(); combine(bitmap); } public void combine(Bitmap bitmap) { updateBuffer(bitmap); draw(canvas); postInvalidate(); } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); canvas.drawBitmap(buffer, matrix , null); } private void updateBuffer(Bitmap bitmap) { if(buffer == null){ createBuffer(bitmap); } else{ if(bitmap.getWidth() &gt; buffer.getWidth() || bitmap.getHeight() &gt; buffer.getHeight()){ Bitmap oldBuffer = buffer; createBuffer(bitmap); drawBitmnapToBuffer(oldBuffer); oldBuffer.recycle(); } drawBitmnapToBuffer(bitmap); } getLayoutParams().height = buffer.getHeight(); getLayoutParams().width = buffer.getWidth(); } private void drawBitmnapToBuffer(Bitmap bitmap) { canvas.save(); // add your translation logic here using canvas.translate(dx, dy); canvas.drawBitmap(bitmap, matrix, null); canvas.restore(); } private void createBuffer(Bitmap bitmap) { buffer = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Config.ARGB_8888); canvas = new Canvas(buffer); } } </code></pre>
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    1. POOverlay image on top of another image
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    1. USIlya Gazman
    1. USIlya Gazman
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    1. VO
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      1. VTUpMod
    1. CODo i input the imageview of the one the user moved or the background image into CombineImages.combine(ImageView)?
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      1. USthhVictor
    2. CO@thhVictor The one the user move. After you used CombineImages.combine() it will marge the images and you can delete the image the user moved, it will be already part of the background.
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      1. USIlya Gazman
    3. COWhen I called the combine method in CombineImages, it gives me nullpointer. I called this combineImages.combine(img_additionalImage); img_additionalImage is the image user moves and combineImages is the CombineImages class.
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      1. USthhVictor
 

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