How to properly handle touch on android?

Question

Android

Hello.
I recently made my first android game that uses drawing. But it still has a lot of mistakes. I'll deal with the logic myself, but I'm creating android interfaces for the first time.
Judging by the reviews, there are problems with recognizing clicks:
1) one wrote that “draws two cm higher”
2) the other wrote that it draws extra lines (I think due to false clicks)
I checked only on the emulator, and errors such did not observe.
In the application, I use my own class inherited from View, in which the processing of clicks is carried out using the overloaded onTouchEvent () method, in which I implemented the processing only: down, up, move, cancel, I receive and process only X, Y from the parameters.
What could I forget to take into account when processing clicks? I suspect that some of the problems arise due to the high CPU costs for redrawing (I figured out the redrawing) , but not all.
Link to the game The game was posted on Google Play . If you want to test, and tell me what is wrong and what can be fixed, I will be grateful. While there are too many shortcomings, I even wanted to either postpone the release for another week, or write the version number 0.99.
ps Is there an easy way to correctly handle screen rotation?

Answer 1

Everything that you asked has already been frayed a hundred times, and there are no problems with tachs and turns if you do everything right. I think you have a couple of joints there, I tried the application - it behaves very strange)