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copied!<p>sample to position icon bitmap over the center of map bitmap: </p> <pre><code>class Scr extends MainScreen { Bitmap mMapBitmap = Bitmap.getBitmapResource("map.png"); Bitmap mIconBitmap = Bitmap.getBitmapResource("icon.png"); Bitmap getOverlappedBitmap(Bitmap map, Bitmap icon) { Graphics g = new Graphics(map); int width = icon.getWidth(); int height = icon.getHeight(); int x = (map.getWidth() - width) / 2; int y = (map.getHeight() - height) / 2; g.drawBitmap(x, y, width, height, icon, 0, 0); return map; } public Scr() { add(new BitmapField(getOverlappedBitmap(mMapBitmap, mIconBitmap))); } } </code></pre> <ul> <li>create array of bitmaps</li> <li>create Graphics from new bitmap and draw all bitmaps with defined alpha value</li> <li>use custom class <a href="http://www.mobiyana.com/code/blackberry/PNGEncoder.java" rel="nofollow noreferrer">PNGEncoder</a> to save bitmap png image</li> </ul> <p>See example</p> <pre><code>class Scr extends MainScreen { Bitmap[] images = new Bitmap[0]; int width = Display.getWidth(); int height = Display.getHeight(); Bitmap bitmap = new Bitmap(width, height); BitmapField bitmapField = new BitmapField(bitmap); public Scr() { add(bitmapField); } MenuItem mAddBitmap = new MenuItem("Add image", 0, 0) { public void run() { Bitmap image = Bitmap.getBitmapResource("img" + (images.length + 1) + ".png"); Arrays.add(images, image); refresh(); } }; MenuItem mClean = new MenuItem("Clean", 0, 0) { public void run() { images = new Bitmap[0]; refresh(); } }; MenuItem mSave = new MenuItem("Save", 0, 0) { public void run() { String mFileName = System.getProperty("fileconn.dir.photos") + "test.bmp"; // bitmap to byte array conversion byte[] bitmapBuffer = new byte[0]; PNGEncoder encoder = new PNGEncoder(bitmap, true); try { bitmapBuffer = encoder.encode(true); } catch (IOException e) { e.printStackTrace(); } writeFile(bitmapBuffer, mFileName); } }; private void writeFile(byte[] data, String fileName) { FileConnection fconn = null; try { fconn = (FileConnection) Connector.open(fileName, Connector.READ_WRITE); } catch (IOException e) { System.out.print("Error opening file"); } if (fconn.exists()) try { fconn.delete(); } catch (IOException e) { System.out.print("Error deleting file"); } try { fconn.create(); } catch (IOException e) { System.out.print("Error creating file"); } OutputStream out = null; try { out = fconn.openOutputStream(); } catch (IOException e) { System.out.print("Error opening output stream"); } try { out.write(data); } catch (IOException e) { System.out.print("Error writing to output stream"); } try { fconn.close(); } catch (IOException e) { System.out.print("Error closing file"); } } void refresh() { bitmap = new Bitmap(width, height); Graphics g = new Graphics(bitmap); for (int i = 0; i < images.length; i++) { g.setGlobalAlpha(100); g.drawBitmap(0, 0, width, height, images[i], 0, 0); } bitmapField.setBitmap(bitmap); } protected void makeMenu(Menu menu, int instance) { super.makeMenu(menu, instance); menu.add(mAddBitmap); menu.add(mSave); menu.add(mClean); } } </code></pre>

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