A memo on how to call getWindowManager inside a fragment in Android.

■Activity

DisplayMetrics displaymetrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(displaymetrics);

In Fragment, call getWindowManager via the getActivity method.

■Fragment

DisplayMetrics displaymetrics = new DisplayMetrics();
getActivity().getWindowManager().getDefaultDisplay().getMetrics(displaymetrics);

[Reference]

・android - get screen width and heigh at fragement - Stack Overflow

・フラグメント間の通信 - Android 開発入門

That’s all from the Gemba.