Uint8Array和Uint8ClampedArray之间的区别(Difference between Uint8Array and Uint8ClampedArray)

 这里的问题是您的应用程序在调用RequestPermissions方法后立即继续执行。 你应该做的是： 
 
 1）覆盖OnRequestPermissionsResult(int requestCode, string[] permissions, Permission[] grantResults) 
 
 2）将GPS代码移动到那里，只有在用户授予了适当的权限时才运行它。 
 
 通过上述更改，您的GPS代码将仅在用户授予/拒绝权限后运行，因为Android仅在关闭对话框后才会调用OnRequestPermissionsResult方法。 
 
 有关完整示例，请查看此处： 在Android Marshmallow中请求运行时权限 。 最重要的部分是Handle Permission Request ，在文章的下半部分。 

The problem here is that your app continues execution straight away after the call to RequestPermissions method. What you should do is this:
 
1) Override OnRequestPermissionsResult(int requestCode, string[] permissions, Permission[] grantResults)
 
2) Move your GPS code there and only run it if the user has granted proper permissions.
 
With the above changes, your GPS code will be run only after the user has granted/rejected the permission because Android will call OnRequestPermissionsResult method only after the dialog is closed.
 
For a full example, take a look here: Requesting Runtime Permissions in Android Marshmallow. The most important part is Handle Permission Request, in the bottom half of the article.