On Apr 6, 8:53 pm, Krzysztof Majkowski <[email protected]> wrote:
> I want to merge and show two bitmaps few times per second ( I'm using
> orientation sensor and need to display in ImageView two parts of one
> big bitmap ).
>
> Bitmap b = BitmapFactory.decodeFile( url );
> Bitmap all = Bitmap.createBitmap( xScreen, yScreen,
> Config.ARGB_8888 );
> Canvas c = new Canvas( all );
> ImageView imageView = ...;
>
> public void drawBitmaps( float values[] )
> {
> ...
>                 c.save();
>                 Bitmap b2 = Bitmap.createBitmap( b, 0, startY,
> xScreen / 2, yScreen );
>                 Bitmap b3 = Bitmap.createBitmap( b, startX, startY,
> xScreen / 2, yScreen );
>
>                 c.drawBitmap( b2, 0, 0, null );
>                 c.drawBitmap( b3, startX, 0, null );
>                 imageView.setImageBitmap( all );
>                 c.restore();
>
> }
>
> I need to call drawBitmaps(...) few times per second, and operation
> Canvas.drawBitmap(...) take a lot of time and it's useless. Do you
> know any better idea how to merge two bitmaps faster?

I'd write a custom View.

pskink

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