Python - 重新打开 pygame 应用程序后黑屏
Python - Black screen afther re-opening pygame application
我用 python pygame 和 android 子集创建了一个简单的基于图块的游戏。
当我在 android 设备上退出应用程序并重新打开它时,我看到黑屏,如果我从 'tabs' 关闭程序,那么游戏将再次运行,有人知道这是什么问题吗?我必须在程序中添加一些代码吗?
from pygame.locals import *
from settings import *
from sprites import *
import pygame
import time
import sys
import os
try:
import pygame_sdl2
pygame_sdl2.import_as_pygame()
except ImportError:
pass
pygame.init()
pygame.display.set_caption(TITLE)
class Game:
def __init__(self):
self.clock = pygame.time.Clock()
self.screen = pygame.display.set_mode((WIDTH, HEIGHT))
self.up_button = pygame.Rect(1000, 400, 100, 100)
self.down_button = pygame.Rect(1000, 600, 100, 100)
self.right_button = pygame.Rect(1100, 500, 100, 100)
self.left_button = pygame.Rect(900, 500, 100, 100)
self.all_sprites = pygame.sprite.Group()
self.walls = pygame.sprite.Group()
self.player = Player(self, 2, 2)
for x in range(5, 10):
Wall(self, x, 3)
for x in range(5, 10):
Wall(self, x, 7)
for y in range(3, 8):
Wall(self, 10, y)
self.buttons = pygame.sprite.Group()
self.game_over = False
def update(self):
self.all_sprites.update()
def draw(self):
self.screen.fill(BLACK)
self.draw_grid()
self.all_sprites.draw(self.screen)
pygame.draw.rect(self.screen, GREEN, self.up_button)
pygame.draw.rect(self.screen, RED, self.down_button)
pygame.draw.rect(self.screen, BLUE, self.right_button)
pygame.draw.rect(self.screen, YELLOW, self.left_button)
pygame.display.update()
def events(self):
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
sys.exit()
elif event.type == KEYDOWN:
if event.key == K_ESCAPE:
pygame.quit()
sys.exit()
elif event.type == MOUSEBUTTONDOWN:
mouse_pos = pygame.mouse.get_pos()
if self.up_button.collidepoint(mouse_pos):
self.player.move(dy = -1)
elif self.down_button.collidepoint(mouse_pos):
self.player.move(dy = 1)
elif self.right_button.collidepoint(mouse_pos):
self.player.move(dx = 1)
elif self.left_button.collidepoint(mouse_pos):
self.player.move(dx = -1)
def run(self):
self.title_menu()
while not self.game_over:
self.clock.tick(FPS)
self.events()
self.update()
self.draw()
def draw_grid(self):
for x in range(0, WIDTH, TILESIZE):
pygame.draw.line(self.screen, LIGHTGRAY, (x, 0), (x, HEIGHT))
for y in range(0, HEIGHT, TILESIZE):
pygame.draw.line(self.screen, LIGHTGRAY, (0, y), (WIDTH, y))
def title_menu(self):
pass
if __name__ == '__main__':
game = Game()
game.run()
由于某些我不太明白的原因,看起来对屏幕的引用(您存储在 Game
对象的 screen
属性 中)是在 Android main Activity 失去焦点后丢失。一个可能的原因可能与 EGL Context Lost 有关,尽管我没有重要的元素来证实这个假设。
尽管造成这个问题的原因很多,但我想我已经找到了解决办法。首先,您需要在应用程序返回前台时捕获事件(有关如何通过特定 SDL2 事件执行此操作的更多详细信息,请查看 this answer),然后恢复屏幕引用。
以下是对我有用的方法,适用于您的 events
方法:
def events(self):
for event in pygame.event.get():
if event.type == 261:
# 261 is SDL_APP_WILLENTERFOREGROUND event code
self.screen = pygame.display.set_mode((WIDTH, HEIGHT))
# ...
我用 python pygame 和 android 子集创建了一个简单的基于图块的游戏。 当我在 android 设备上退出应用程序并重新打开它时,我看到黑屏,如果我从 'tabs' 关闭程序,那么游戏将再次运行,有人知道这是什么问题吗?我必须在程序中添加一些代码吗?
from pygame.locals import *
from settings import *
from sprites import *
import pygame
import time
import sys
import os
try:
import pygame_sdl2
pygame_sdl2.import_as_pygame()
except ImportError:
pass
pygame.init()
pygame.display.set_caption(TITLE)
class Game:
def __init__(self):
self.clock = pygame.time.Clock()
self.screen = pygame.display.set_mode((WIDTH, HEIGHT))
self.up_button = pygame.Rect(1000, 400, 100, 100)
self.down_button = pygame.Rect(1000, 600, 100, 100)
self.right_button = pygame.Rect(1100, 500, 100, 100)
self.left_button = pygame.Rect(900, 500, 100, 100)
self.all_sprites = pygame.sprite.Group()
self.walls = pygame.sprite.Group()
self.player = Player(self, 2, 2)
for x in range(5, 10):
Wall(self, x, 3)
for x in range(5, 10):
Wall(self, x, 7)
for y in range(3, 8):
Wall(self, 10, y)
self.buttons = pygame.sprite.Group()
self.game_over = False
def update(self):
self.all_sprites.update()
def draw(self):
self.screen.fill(BLACK)
self.draw_grid()
self.all_sprites.draw(self.screen)
pygame.draw.rect(self.screen, GREEN, self.up_button)
pygame.draw.rect(self.screen, RED, self.down_button)
pygame.draw.rect(self.screen, BLUE, self.right_button)
pygame.draw.rect(self.screen, YELLOW, self.left_button)
pygame.display.update()
def events(self):
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
sys.exit()
elif event.type == KEYDOWN:
if event.key == K_ESCAPE:
pygame.quit()
sys.exit()
elif event.type == MOUSEBUTTONDOWN:
mouse_pos = pygame.mouse.get_pos()
if self.up_button.collidepoint(mouse_pos):
self.player.move(dy = -1)
elif self.down_button.collidepoint(mouse_pos):
self.player.move(dy = 1)
elif self.right_button.collidepoint(mouse_pos):
self.player.move(dx = 1)
elif self.left_button.collidepoint(mouse_pos):
self.player.move(dx = -1)
def run(self):
self.title_menu()
while not self.game_over:
self.clock.tick(FPS)
self.events()
self.update()
self.draw()
def draw_grid(self):
for x in range(0, WIDTH, TILESIZE):
pygame.draw.line(self.screen, LIGHTGRAY, (x, 0), (x, HEIGHT))
for y in range(0, HEIGHT, TILESIZE):
pygame.draw.line(self.screen, LIGHTGRAY, (0, y), (WIDTH, y))
def title_menu(self):
pass
if __name__ == '__main__':
game = Game()
game.run()
由于某些我不太明白的原因,看起来对屏幕的引用(您存储在 Game
对象的 screen
属性 中)是在 Android main Activity 失去焦点后丢失。一个可能的原因可能与 EGL Context Lost 有关,尽管我没有重要的元素来证实这个假设。
尽管造成这个问题的原因很多,但我想我已经找到了解决办法。首先,您需要在应用程序返回前台时捕获事件(有关如何通过特定 SDL2 事件执行此操作的更多详细信息,请查看 this answer),然后恢复屏幕引用。
以下是对我有用的方法,适用于您的 events
方法:
def events(self):
for event in pygame.event.get():
if event.type == 261:
# 261 is SDL_APP_WILLENTERFOREGROUND event code
self.screen = pygame.display.set_mode((WIDTH, HEIGHT))
# ...