How to extract text from pdf in android programatically

问题

I want to extract text from pdf file which is submitted by user using android programmatically.How its possible?

I referred this link to display the pdf file from SD card.

I tried like this to get text from text file can able to speak it out but not from pdf.

But the thing is how can I extract text from that PDF?

来源：https://stackoverflow.com/questions/29776848/how-to-extract-text-from-pdf-in-android-programatically