How does Android determine if a dialog is displayed?

You can use the isShowing() method of Dialog to determine if the Dialog is currently being displayed.

The example code is shown below:

Dialog dialog = new Dialog(context);
// 显示Dialog
dialog.show();

// 判断Dialog是否显示
if (dialog.isShowing()) {
    // Dialog正在显示
} else {
    // Dialog没有显示
}

In the above code, a Dialog object is created first and then displayed by calling the show() method. The isShowing() method is then used to determine if the Dialog is currently being displayed, and actions are taken based on the result returned.