Hi! Im newbie with android, but I know Java enough for start developing in this platform, I was doing some codes and then I have a question.

Situation:
I have TextView with a number. If I touch the number the number increases, ok. But I wanna that you dont have to touch, you drag up o drag down to increases o decreases the number, without move the TextView.

Sorry my bad english, I dont know if I explained well this.