Yeah, you can do this. Keep in mind, since you’re not attaching it to a layout, you’ll need to lay it out manually before drawing it: view.layout(0, 0, viewWidth, viewHeight); And unless you just know exactly what you want for those width and height parameters, you may also want to measure it first: int widthSpec … Read more
You need a mutable Bitmap in order to create the Canvas. Bitmap bmp = BitmapFactory.decodeByteArray(data, 0, data.length); Bitmap mutableBitmap = bmp.copy(Bitmap.Config.ARGB_8888, true); Canvas canvas = new Canvas(mutableBitmap); // now it should work ok Edit: As Noah Seidman said, you can do it without creating a copy. BitmapFactory.Options options = new BitmapFactory.Options(); options.inMutable = true; Bitmap … Read more
The following worked for me: private Drawable resize(Drawable image) { Bitmap b = ((BitmapDrawable)image).getBitmap(); Bitmap bitmapResized = Bitmap.createScaledBitmap(b, 50, 50, false); return new BitmapDrawable(getResources(), bitmapResized); }
Two ways to get bitmap of view Using Canvas Using Pixel Api Canvas Java Bitmap getBitmapFromView(View view) { Bitmap bitmap = Bitmap.createBitmap( view.getWidth(), view.getHeight(), Bitmap.Config.ARGB_8888 ); Canvas canvas = new Canvas(bitmap); view.draw(canvas); return bitmap; } Bitmap getBitmapFromView(View view,int defaultColor) { Bitmap bitmap = Bitmap.createBitmap( view.getWidth(), view.getHeight(), Bitmap.Config.ARGB_8888 ); Canvas canvas = new Canvas(bitmap); canvas.drawColor(defaultColor); view.draw(canvas); … Read more
You can convert your immutable bitmap to a mutable bitmap. I found an acceptable solution that uses only the memory of one bitmap. A source bitmap is raw saved (RandomAccessFile) on disk (no ram memory), then source bitmap is released, (now, there’s no bitmap at memory), and after that, the file info is loaded to … Read more
You could just use the imageView’s image cache. It will render the entire view as it is layed out (scaled,bordered with a background etc) to a new bitmap. just make sure it built. imageView.buildDrawingCache(); Bitmap bmap = imageView.getDrawingCache(); there’s your bitmap as the screen saw it.
Here is how I would manipulate pixels in C# using multidimensional arrays: [StructLayout(LayoutKind.Sequential)] public struct PixelColor { public byte Blue; public byte Green; public byte Red; public byte Alpha; } public PixelColor[,] GetPixels(BitmapSource source) { if(source.Format!=PixelFormats.Bgra32) source = new FormatConvertedBitmap(source, PixelFormats.Bgra32, null, 0); int width = source.PixelWidth; int height = source.PixelHeight; PixelColor[,] result = new … Read more
convert works much better than montage. It arranges images vertically or horizontally and keeps png transparency. convert *.png -append sprites.png (append vertically) convert *.png +append sprites.png (append horizontally)
Here is the Colin’s Blog who suggest the simple method to convert bitmap to Uri Click here public Uri getImageUri(Context inContext, Bitmap inImage) { ByteArrayOutputStream bytes = new ByteArrayOutputStream(); inImage.compress(Bitmap.CompressFormat.JPEG, 100, bytes); String path = MediaStore.Images.Media.insertImage(inContext.getContentResolver(), inImage, “Title”, null); return Uri.parse(path); }
I have used this snipped now to convert the Bitmap to a ImageSource: BitmapImage BitmapToImageSource(Bitmap bitmap) { using (MemoryStream memory = new MemoryStream()) { bitmap.Save(memory, System.Drawing.Imaging.ImageFormat.Bmp); memory.Position = 0; BitmapImage bitmapimage = new BitmapImage(); bitmapimage.BeginInit(); bitmapimage.StreamSource = memory; bitmapimage.CacheOption = BitmapCacheOption.OnLoad; bitmapimage.EndInit(); return bitmapimage; } }