aparece quando vou executar e a partir desse ponto n consigo mais executar o programa, segue mensagem de erro:
The following classes could not be instantiated:
Exception Details java.lang.NoClassDefFoundError: com/google/android/material/R$attr at com.google.android.material.floatingactionbutton.FloatingActionButton.<init>(FloatingActionButton.java:188) at java.lang.reflect.Constructor.newInstance(Constructor.java:423) at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730) at android.view.LayoutInflater.rInflate_Original(LayoutInflater.java:863) at android.view.LayoutInflater_Delegate.rInflate(LayoutInflater_Delegate.java:72) at android.view.LayoutInflater.rInflate(LayoutInflater.java:837) at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824) at android.view.LayoutInflater.inflate(LayoutInflater.java:515) at android.view.LayoutInflater.inflate(LayoutInflater.java:394) Copy stack to clipboard 