Show min and max values. about spark HOT 6 CLOSED

I think you could use the getScaledX() and getScaledY() APIs on SparkView to determine where to draw your min/max labels. By default SparkAdapter.getDataBounds() gives you back the min and max data points in your adapter.

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I did find those methods..However even after getting the floating value point how i can actually add an UI element to the existing SparkView graph? For example: is there a method such a sparkView.setTextView(string value, float x) or something along those lines? Or do we just use the draw(Canvas canvas) method on the sparkView. I am lost at how to update the SparkView class with a new label.

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Awesome! Now you'll want to instantiate a TextView programmatically and position it using the scaled x and y values returned from your SparkView. SparkView is just a Sparkline so it doesn't provide the ability to add labels out-of-the-box.

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I tried the approach that you suggested. However from the documentation it seems like the SparkView doesn't really use the x-axis co-ordinates. It divides the x-axis equally and simply draws a Path along the y-axis. That being said, wouldn't the getScaledX() return me a pixel which is not actually used by the SparkView. If i try the aforementioned approach, the text is not visible at all, however if i only use the getScaledY() and then use text.setY(float y) i see can see the text on the top left corner since that is the highest value.

Apologies if this is getting out of hand.

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Hi @pkhivesara,

@naturalwarren is right, we don't support this out of the box, but you should be able to roll-your-own here.

The x-axis behavior you mentioned can be changed. If you want spark to use the x values from your data, you can override getX() in your SparkAdapter.

So after doing that, you can getScaledX/Y to find the spark-local coordinates of the min and max points in your data. You should be able to use those to position a TextView however you'd like. Or you could even subclass SparkView itself and draw text directly to the canvas in onDraw().

This is a fair amount of work, though, and I believe MpAndroidChart likely supports this out of the box: https://github.com/PhilJay/MPAndroidChart

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I am not sure but whenever i try to use the approach mentioned above, the text is always displayed either on top left or top right. It seems like the layout is being added against the screen width and height. Not the SparkView itself. Either ways i understand since this requirement is not part of SparkView, i will be closing the ticket. Thanks for all the help.!

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