dmGraphics::GetNativeAndroidActivity can not get Window object in cpp source code

hello , I want to get window object by dmGraphics::GetNativeAndroidActivity on android. but now I get nullpoint jobject by JNI. I don` known why, for this code , it was run on android project can get window object. so can u help me to resolved this problem , the source code like this.

--SOURCE
jclass activity_class = env->GetObjectClass(dmGraphics::GetNativeAndroidActivity());

jmethodID get_window_method = env->GetMethodID(activity_class, "getWindow",
"()Landroid/view/Window;");

jobject window_object = env->CallObjectMethod(dmGraphics::GetNativeAndroidActivity(),get_window_method);

Log::println("setFullscreen: get window object , %p",window_object);
--END

now i print window_object point address is 0x0. I checked that dmGraphics::GetNativeAndroidActivity() point address is not null , env is not null.

Please help , Thanks…

Check the safearea extension where we do something similar:

1 Like

hello, Thanks for reply . I resolved this problem by using class_loader to load class, but i found that this method is only run android version >=api 28 ? if i want to run android 27 or lower , have any idea ?