Return the color of navigation bar. @param activity The activity. @return the color of navigation bar

Return the navigation bar's height. @return the navigation bar's height

Return the density of screen. @return the density of screen

Return the screen density expressed as dots-per-inch. @return the screen density expressed as dots-per-inch

Return the rotation of screen. @param activity The activity. @return the rotation of screen

Return the duration of sleep. @return the duration of sleep.

Return whether screen is full. @param activity The activity. @return {@code true}: yes<br>{@code false}: no

Return whether screen is landscape. @return {@code true}: yes<br>{@code false}: no

Return whether the navigation bar visible. <p>Call it in onWindowFocusChanged will get right result.</p> @param activity The activity. @return {@code

Return whether screen is locked. @return {@code true}: yes<br>{@code false}: no

Is the status bar light mode. @param activity The activity. @return {@code true}: yes<br>{@code false}: no

Return whether the status bar is visible. @param activity The activity. @return {@code true}: yes<br>{@code false}: no

Return whether the navigation bar visible. @return {@code true}: yes<br>{@code false}: no

Return whether device is tablet. @return {@code true}: yes<br>{@code false}: no

TODO 模拟登录的网络请求 @param user ui 层填写的用户信息