The demo project contains all three solutions for dialogs show up. You can run any of them via clicking "Solution #" button. Notice, that for "Solution 3" demo contains both cases with embed view and DialogShowingView.

For instance you can start "Solution 1" like this:

Or you can start "Solution 3" for both scenarios like this:

To simulate "Duplicated state" problem for both solutions 1 and 2 you can follow the next steps:

1. Open the required solution in the demo application;
2. Press "Home" button;
3. Press "Terminate Application" in Logcat window in Android Studio (this will kill the app process, make sure you select your device and process in Logcat dropdowns at top);
4. Get back to the application through the "Recent apps".

The demo project contains demo of the "State problem" for ToastView. You can check it following the steps from the gifs below.

With problem:

With problem fixed: