更改TextView的画布大小

Question

I need use TextView with outline text. I try use it: https://stackoverflow.com/a/10294290/4181010 , but it doesn't work correctly with android:layout_width="wrap_content" , because it doesn't increase canvas when add outlines.

I need to increase the canvas to include the value of strokeWidth.

I suggest I have to override onMeasure somehow, but TextView call final method setMeasuredDimension at the end of onMeasure to apply view size and I can not intervene at this point so as not to have to rewrite the whole method.

Scaling the canvas in OnDraw does not work either, because TextView scales draw text with canvas.

My solution is increase canvas and use canvas.translate() to move in right position before draw text.
And my question: How can I increase the size of the canvas with minimal intervention? Or someone know another solution for this problem?

Answer 1

I'm guessing you are drawing the text twice, once with the orange (manually on the canvas) and once with the white (what the TextView is drawing with super.onDraw ).

Instead of drawing the larger orange manually, you could instead draw the smaller white text and leave the orange text to TextView 's super.onDraw . That way everything should fit within the canvas.