'Why I get "Expected field or method name at error"

Expected field or method name at ... -keepclassmembers class * { *** @null(android.view.View); }

android proguard build-error

Solution 1:^[1]

I had the same problem and solved by removing android:onClick="@null" from one of my layout files.

Solution 2:^[2]

In my case, I forgot to pass data binding event android:onClick="{}"

Sources

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Source: Stack Overflow

Solution	Source
Solution 1	Dharman
Solution 2	cigien