Android : Is it possible to have proportional vertical text in an Android Button?

I would like the text in a button displayed vertically, similar to as if \n was inserted between each letter. The reason the \n method is not suitable is that the amount of white space between say a letter e and the letter above it is more than that of say a letter t and that above it. This gives a result similar to a monospaced typeface rather than a proportional one. I would like the text on the button to be displayed how a sign writer would craft it.

I understand this is not a trivial task, if indeed it is possible. I effectively need the cap height of letters like e to be reduced to the median, and the baseline to be reduced to zero for letters without desenders.