How can an Android Activity access the parent process window?

In Android, an Activity is a page in an application that is created and managed by its parent process. The Activity itself does not have a direct way to access the parent process window, but it can obtain information related to the parent process window through the following methods:

1. Get the window object of the current Activity using the getWindow() method.

Window window = getWindow();

1. Accessing some properties of the parent process window through the window object, such as its width and height.

int width = window.getAttributes().width;
int height = window.getAttributes().height;

1. To obtain the window view of the parent process, you can use the getWindow().getDecorView() method.

View decorView = getWindow().getDecorView();

Please be aware:

1. In order to obtain accurate window information when calling the above code in an Activity, it is necessary to do so after the onCreate() method.
2. The parent process window information of Activity is set by the system when Activity starts, so it may change during the lifecycle of the Activity.