Answers for a lot of the SDK/Eclipse install and first app. questions

by Kevin » Mon, 03 Nov 2008 05:39:15 GMT


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 I have seen a lot of questions on getting the SDK up and running.
While poking around the net for something else I came across these  
wonderful webcasts and thought I would share them. I have not tried  
the methods on the webcasts as they are for Windows. I am on a mac but  
I watched a couple and it looks to accomplish the same thing with a  
couple (very)slight deviations.
Heres the link:

 http://www.thescreencast.com/2007/12/how-to-google-android-in-eclipse.html 



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1. manipulating parts of an image selectively

How can we manipulate parts of an image selectively. For example, I
have a canvas based on bitmap of image I am working on. I would like
to change a circular region on this image to black & white while the
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image in black & white by

Bitmap myBitmap = BitmapFactory.decodeResource(getResources(),
R.drawable.myImage);
ColorMatrix colorMatrix = new ColorMatrix();
colorMatrix.setSaturation(0);
paint = new Paint();
ColorMatrixColorFilter cmcf = new ColorMatrixColorFilter(colorMatrix);
paint.setColorFilter(cmcf);

Bitmap blackAndWhiteBitmap = Bitmap.createBitmap(myBitmap.getWidth(),
myBitmap.getHeight(), Bitmap.Config.ARGB_8888);

Canvas drawingCanvas = new Canvas(blackAndWhiteBitmap );
drawingCanvas.drawBitmap(myBitmap, 0, 0, paint);

-Gaurav

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2. "Android Developers Group for Singapore and South East Asia" IRC channel is up

That is great and I think we will have some good conversations. Is there any
other developers from Sri Lanka ?

cheers

Nishantha





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