In java we regularly combine flags via the | operator.
例如:
getWindow().getDecorView().setSystemUiVisibility(
View.SYSTEM_UI_FLAG_LAYOUT_STABLE |
View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION |
View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
);
I can't seem to find the equivalent operator in Kotlin. Anyone know a convenient way to combine integer flags in Kotlin?
Just use or:
getWindow().getDecorView().setSystemUiVisibility(
View.SYSTEM_UI_FLAG_LAYOUT_STABLE or
View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION or
View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
);
这可能有点令人困惑.您可以创建一个小助手扩展函数with(或其他任何函数)，使其更具可读性:
infix fun Int.with(x: Int) = this.or(x)
getWindow().getDecorView().setSystemUiVisibility(
View.SYSTEM_UI_FLAG_LAYOUT_STABLE with
View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION with
View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
);