如何使用兼容性库获取"？android:attr/actionBarSize"

import android.os.Build;
import android.support.annotation.RequiresApi;
import android.view.View;
import android.view.ViewGroup;
import android.widget.LinearLayout;
import android.widget.TextView;

public class CompatibilityUtils {

    @RequiresApi(Build.VERSION_CODES.O)
    public static void setActionBarSize(ViewGroup viewGroup, int actionBarSize) {
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) {
            // Do nothing, the code is not needed since SDK 26 (Android 8.0)
        } else {
            LinearLayout.LayoutParams layoutParams = (LinearLayout.LayoutParams) viewGroup.getLayoutParams();
            layoutParams.height = actionBarSize;
            viewGroup.setLayoutParams(layoutParams);
        }
    }

    public static int getActionBarSize(View view) {
        ViewGroup viewGroup = (ViewGroup) view.getParent();
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) {
            // Do nothing, the code is not needed since SDK 26 (Android 8.0)
        } else {
            LinearLayout.LayoutParams layoutParams = (LinearLayout.LayoutParams) viewGroup.getLayoutParams();
            return layoutParams.height;
        }
        return 0;
    }
}

import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        ViewGroup viewGroup = findViewById(R.id.view_group);
        CompatibilityUtils.setActionBarSize(viewGroup, 250);

        // ... other code ...
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();

        ViewGroup viewGroup = findViewById(R.id.view_group);
        CompatibilityUtils.setActionBarSize(viewGroup, 0);
    }
}