Word Detection and change it to Voice ..Like R ..Then Speak R

I have a idea to make an application but i got stuck in between. I want that i can write any letter on android screen by using finger scroll. And now i want to listen from android device that what i have written on the screen of android.

Let I have write R by touching screen now i want to listen the pronunciation of that R as Human voice. Hope y开发者_运维知识库ou all understand my problem

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You can use the GestureOverlay to get the right characters that are written. Take a look over here for the text to speech functionality