You can do mining on your android phone or mobile phone but do not expect that you will get the same amount of coins compared those who are using powerful devices and processors for mining. I think it is much better to say that you will never get to the level of profit and gains that they able to mine. Mobile phones' processors are way too much weaker compared to what is being used regularly for mining that getting even a part of a coin will be very very hard to mine and you'll only damage your device in the process.