Pygame on Android

There is a pygame subset for android. However this requires special reworking and changing the program. It shouldn't be too hard.

http://pygame.renpy.org/writing.html http://pygame.renpy.org/index.html

I cannot answer your second question, I am not experienced enough.

I have successfully ran a pygame program on Android!

First, I debugged the app by saving the error to a file. I got error that on Android it can be run only using full-screen. I've created small app and got it working:

import sys, os
andr = None
try:
    import android
    andr = True
except ImportError:
    andr = False
try:
    import pygame
    import sys
    import pygame
    import random
    import time
    from pygame.locals import *
    pygame.init() 
    fps = 1 / 3
    width, height = 640, 480
    screen = pygame.display.set_mode((width, height), FULLSCREEN if andr else 0)
    width, height = pygame.display.get_surface().get_size()
    while True:
        screen.fill((random.randint(0, 255), random.randint(0, 255), random.randint(0, 255)))
        for event in pygame.event.get():
            if event.type == QUIT:
                pygame.quit()
                sys.exit()
        pygame.display.flip()
        time.sleep(fps)
except Exception as e:
    open('error.txt', 'w').write(str(e))

Screenshot: https://i.sstatic.net/4qXPe.png
requirements in spec file:

requirements = python3,pygame

The APK's file size is only 12 megabytes.

There are some pretty good answers for your first part already so I won't answer that. (I came here looking into what to use for it too!)

However the second part of your question should be a lot easier.

Have a mouse object that on a mouse down event will save the coordinates of the touch to an MX and MY variable Then when the mouse up event is triggered takes the new coordinates and calculates a vector using the MX and MY and this new point ie. The distance and angle of the swipe. Use trigonometry or the math module for the angle (research arctan2).

You can then use this in an if, elif, else to determine what quadrant the angle was and the distance to determine whether the swipe was valid if it's greater than a certain value.

I'm on mobile so unfortunately I can't give an example, however I'm certain you're apt to work out the solution with this guidance.

I think the pygame subset for Android would be good but I don't trust its functionality. I use Kivy as it's cross platform. But, if you ever decide to use the pygame subset for Android, your tap of the screen of an Android device would be your mouse movement on the desktop. I am saying treat your tapping as the mouse. Good luck!

For your second question, there is an answer in another website.

https://amp.reddit.com/r/Python/comments/2ak14j/made_my_first_android_app_in_under_5_hours_using/

it says You can try code like this

if android:
    android.map_key(android.KEYCODE_BACK, pygame.K_ESCAPE)

I hope it will help you.

pygame.event has multiple touch-screen events, here are some useful ones:

FINGERMOTION      touch_id, finger_id, x, y, dx, dy
FINGERDOWN        touch_id, finger_id, x, y, dx, dy
FINGERUP          touch_id, finger_id, x, y, dx, dy
MULTIGESTURE      touch_id, x, y, pinched, rotated, num_fingers

reference: https://www.pygame.org/docs/ref/event.html?highlight=multigesture