Only the original thread that created a view hierarchy can touch its views. Android studios

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An important point to be remembered while trying to do any operations with UI views is that, only UI thread that created a view hierarchy can touch its views. Following is simple example, where we try to access a TextView (that belong to UI thread) in another thread. MainActivity.kt - Reproducing Error

runOnUiThread Added in API level 1 public final void runOnUiThread (Runnable action) Runs the specified action on the UI thread. If the current thread is the UI thread, then the action is executed immediately. If the current thread is not the UI thread, the action is posted to the event queue of the UI thread

Parameters action Runnable: the action to run on the UI thread Android studios android app solving error on your android app #android #error ... https://www.youtube.com/watch?v=JWTT8KxS3cs