I thought rebuilding the app would get things rolling. Turns out I was the one in my own way.

I removed an assignment statement which assigned the static original_adapter ArrayAdapter object to the dynamic display_adapter ArrayAdapter object.

You can find a video at the bottom of the page and a link to the source code here.

The assignment operator assigns references of objects. Since both adapters are objects, using the assignment operator assigns the reference of the original_adapter to the display_adapter. (click below)

This applied any changes made to the display_adapter object to the original_adapter.

The dynamic_adapter is meant to copy the original_adapter and is emptied prior to any updates based on the user’s input. The onEditorAction method clears the dynamic_adapter when the user presses enter on the keyboard.

Because it shares a reference with the original_adapter variable, pressing enter clears the original_adapter as well. As a result, any attempt to obtain specific indexes led to an ArrayOutOfBoundsException.

I will I replace this assignment with a for loop which adds each item of the original_adapter to the display_adapter. Using a for loop avoids assigning the reference and ensures the display_adapter can be updated independent of the original_adapter.

For more on this, watch the YouTube video below. For the source code click here. To read more about these exceptions, check out the Oracle documentation here

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Coding Fanatic

Image by Keith Johnston from Pixabay