Web Reference: Did try adding the onClick in the xml-layout like this? If so, make sure that there are no typos. In your case it would probably be: Feb 2, 2024 · This tutorial demonstrates the java.lang.IllegalStateException: Could not execute method of the activity error while working for android app development in Java. It also talks about its cause and solution. Jan 16, 2026 · This error typically occurs when the app fails to invoke a method (e.g., adding an item to a RecyclerView) triggered by a user action like clicking a button. In this guide, we’ll break down the root causes of this error, walk through step-by-step fixes, and share best practices to prevent it.
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