First, you should use ARGB_8888... ARGB_4444 is deprecated: http://developer.android.com/reference/android/graphics/Bitmap.Config.html
Next, here is how to do it: temp = Bitmap.createBitmap(thisWidth, thisHeight, Config.ARGB_8888); //Clear the canvas Canvas canvas = new Canvas(temp); Paint transPainter = new Paint(); transPainter.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.CLEAR)); canvas.DrawRect(0, 0, temp.Width, temp.Height, transPainter); Hope that helps... Thanks, Justin Anderson MagouyaWare Developer http://sites.google.com/site/magouyaware On Mon, Apr 2, 2012 at 9:54 AM, Perry <[email protected]> wrote: > hi, > > I used following method to create a canvas. > > temp = Bitmap.createBitmap(thisWidth, thisHeight, Config.ARGB_4444); > Canvas thisCanvas = new Canvas(temp); > > I don't know why the canvas has a black background. How to create a > Transparent background for use? > > Thanks a lot! > > -- > You received this message because you are subscribed to the Google > Groups "Android Developers" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected] > For more options, visit this group at > http://groups.google.com/group/android-developers?hl=en -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
