检查位置是否在边界内

Question

我正在使用Android studio并尝试创建使用Google Maps V2的应用程序。我使用API Key使地图运行良好。 我将向markers添加几个map。我想以这样的方式添加markers，只有当他们位于当前radius用户的特定location时才会添加marker。是否有任何方法可以检查radius是否包含在radius中？我们如何为地图添加import random def game(): # Generate a random number between 1-100 and initiate repeat guess list secret_num=random.randint(1,10) # Initiate duplicate list # Consider using a set instead so you don't have to cast it into a set later already_guesses = [] while True: # Ask for user guess guess = int(input('Guess a number from 1-10> ')) # Help with guesses and announce if it is correct number! # Catch someone if they submit the same number if guess in already_guesses: print ("You already guessed that number, try again") elif guess == secret_num: # Format your strings properly print("whooohoo! you guessed it, my number is {0}".format(secret_num)) # See how many unique guesses there were and add the correct guess to it (+1) # To do so just use a set print("It took you {0} guesses".format( len(set(already_guesses))+1 )) break elif guess < secret_num: print("You\'re getting hot, try a higher number") else: guess > secret_num print("You\'re cold, try a lower number") # Make sure to append the guess to the already_guessed list in any case, not just if the number is in already_guesses # If you only do that in your original if block, already_guesses will always remain empty already_guesses.append(guess) # Ask if they want to play again play_again = input("Do you wanna play again? y/n") if play_again != 'n': game() else: print("Bah Bye!") game() ？

Answer 1

如果有人徘徊，我就是这样做的。 Location中有一个名为distanceBetween（）的方法。 这是该方法的文档。您可能会发现distanceTo（）也很有用。 http://developer.android.com/reference/android/location/Location.html 向下滚动以找到方法。

Answer 2

您也可以使用：

GOOD_CHARS = ('a'..'z').to_a.join << "'-" #=> "abcdefghijklmnopqrstuvwxyz'-" def validate(str) return false if str.empty? || (str[0]==' ' || str[-1]==' ') nbr_spaces = str.count(' ') return false if nbr_spaces > 2 str.downcase.count(GOOD_CHARS) + nbr_spaces == str.size end validate "a B-' v" #=> true validate "aB-'v" #=> true validate "aB-`1v" #=> false validate "a B-'1 v" #=> false validate " a B-'1v" #=> false

这将检查LatLngBounds bounds = googleMap.getProjection().getVisibleRegion().latLngBounds; bounds.contains(your_bounds)

中your_bounds是否被联合起来