[android-developers] Re: How to draw pixels?

Thanks for replying, I think I didn't describe my needs clearly.
What I want are:
1. Use 30 bytes to represent one line
2. One byte has 8 bits, each bit to represent one pixel.
3. So one line has 240 (30x8) pixels.
4. If a bit's value is 0, set a pixel to black
5. If 1, set a pixel to white
6. I have 120 lines to draw.
7. I need to update each line very often.

So, not if one bit is 0, then draw a black line.

And for expanding the encoding, could you give any hint?

Thank you.

On Dec 4, 12:28 pm, James Black <planiturth...@gmail.com> wrote:
> You will need to expand the encoding you have and then it would seem the
> best approach is to have a white background, then just draw a line (http://stackoverflow.com/questions/3616676/how-to-draw-a-line-in-android)
> for the black lines, so, you would need to find the start of the current
> line segment, see how many pixels in that segment, then draw the line, then
> skip over the white ones (that would be like drawing a white line) and draw
> the next black line segment.
>
>
>
>
>
>
>
>
>
> On Sat, Dec 3, 2011 at 7:34 PM, Vincent <renws1...@gmail.com> wrote:
> > Hi,
>
> > I want to draw an image from bytes. E.g. I have a byte "01111010",  a
> > black pixel for a 0, a white pixel for a 1, then I need draw an 8
> > pixels line "black white white white white black white black white" on
> > the screen.
>
> > I have about 3000 bytes (30 bytes per line)to draw an image, and I
> > need to update the image frequently.
>
> > Could you give any suggestion? Is Bitmap.createBitmap from colors
> > array applicable?
>
> > Android 3.2
>
> > --
> > You received this message because you are subscribed to the Google
> > Groups "Android Developers" group.
> > To post to this group, send email to android-developers@googlegroups.com
> > To unsubscribe from this group, send email to
> > android-developers+unsubscribe@googlegroups.com
> > For more options, visit this group at
> >http://groups.google.com/group/android-developers?hl=en
>
> --
> "I know that you believe you understand what you think I said, but I'm not
> sure you realize that what you heard is not what I meant."
> - Robert McCloskey

--
You received this message because you are subscribed to the Google
Groups "Android Developers" group.
To post to this group, send email to android-developers@googlegroups.com
To unsubscribe from this group, send email to
android-developers+unsubscribe@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/android-developers?hl=en