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This is great! Thank you very much Klaus! I appreciate your help very much!...
link: This should work: Dim cvs As Canvas Dim bmp As Bitmap bmp.InitializeMutable(800...
link: java.lang.RuntimeException: Bitmap is not mutable. I change my code like this: Dim rc As Rect...
link: This line initializes a black bitmap. bmp.InitializeMutable(iWidth * 100dip / 100, iHeight * 100dip...

I do it like this: Private MyBitmap As B4XView Private pnl As B4XView Private cvs... cvs.Initialize(pnl) MyBitmap = cvs.CreateBitmap Thank you Klaus. You save my life :)...
link: I do it like this: Private MyBitmap As B4XView Private pnl As B4XView Private cvs...
link: initialize it and assigned dimensions Draw on it and then get the bitmap Something similar to (untested...

to understand how to use them. Lets start with BitmapCreator. BitmapCreator is similar to a mutable bitmap. Its core is made of an array of bytes that stores the image data. When you call... BitmapCreator with X2.BitmapToBC. This sub calls bc.CopyPixelsFromBitmap to extract the image data from... on a BitmapCreator, the transparent parts in the source image will not be copied to the target BC (which... is made of 4 images. The furthest image is stored as a BitmapCreator and the others are stored as CBCs...

Sub Name: DrawRoundBitmap Description: This code uses Path object to draw a round bitmap at the center of a transparent mutable bitmap. Sub Activity_Create(FirstTime As Boolean) Dim cvs As Canvas = CreateBitmap DrawRoundBitmap(cvs, LoadBitmap(File.DirAssets, "1.jpg")) Activity.SetBackgroundImage(cvs.Bitmap) End Sub Sub CreateBitmap As Canvas Dim bmp As Bitmap bmp.InitializeMutable(200dip, 200dip) Dim cvs As Canvas cvs.Initialize2(bmp) Dim r As Rect r...

It works ! :D Private bitmap2 As Bitmap bitmap2.InitializeMutable(800,600) cvs.Initialize2(bitmap2) cvs.DrawColor(Colors.Green) Dim Out As OutputStream Out = File.OpenOutput...
link: You need to use Canvas.Initialize2 to draw over a mutable bitmap. Canvas.Initialize expects a view...
link: If I declare as bitmap, it compiles, but afterward I get this : ** Service (starter) Create...
link: the exception : Private bitmap2 As BitmapDrawable bitmap2.InitializeMutable(800,600) It is my hope that Erel...

Don't create a new canvas every time. Reuse it. A canvas holds a large mutable bitmap....

Best option is to use Canvas.DrawDrawable to draw the icon on a mutable bitmap....

forgot about Mutable Bitmap, it is properly mentioned 1000+ times in the Forum ;) THX :)...
link: you could use a mutable bitmap to preserve the original resolution and aspect ratio: ' Load bitmap...

I have a Bitmap object loaded with an image file from the cache folder. I don't have any imageview yet, just the Bitmap object. I want to draw a shape (like line or rectange) on this bitmap. I tried the Canvas object but it seem to draw only on Views and on mutable bitmaps, but not on bitmaps...
link: mutable bitmap (Bitmap.InitializeMutable) and initialize the canvas with this bitmap. You can then draw...
link: Surface library to transform this bitmap in a mutable one (AS_ImageUtils class, MakeMutable function)....

Can you tell where I am doing wrong You are not reusing the canvas. Initialize it once in Activity_Create with a mutable bitmap (the mutable bitmap should be a process global variable) and reuse it....
link: The error has nothing to do with Invalidate. When you initialize a canvas a mutable bitmap...