AppCompat v7 disabledAlpha bug

Hoge.java

import android.os.Build;
import android.util.TypedValue;
import android.view.View;

/**
 * Created by S64 on 15/11/06.
 */
public class Hoge {

    public static void setEnabledCompat(View view, boolean enabled) {
        {
            view.setEnabled(enabled);
        }
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
            float newAlpha;
            if (!enabled) {
                TypedValue typedValue = new TypedValue();
                view.getContext().getTheme().resolveAttribute(android.R.attr.disabledAlpha, typedValue, true);
                newAlpha = typedValue.getFloat();
            } else {
                newAlpha = 1;
            }
            view.setAlpha(newAlpha);
        }
    }

}