-import android.support.design.widget.BaseTransientBottomBar;
-import android.support.design.widget.FloatingActionButton;
-import android.support.design.widget.Snackbar;
-import android.support.v4.app.DialogFragment;
-import android.support.v7.app.AppCompatActivity;
-import android.support.v7.widget.Toolbar;
+import com.google.android.material.snackbar.BaseTransientBottomBar;
+import com.google.android.material.floatingactionbutton.FloatingActionButton;
+import com.google.android.material.snackbar.Snackbar;
+import androidx.fragment.app.DialogFragment;
+import androidx.appcompat.widget.Toolbar;