ionic status bar not showing code example

Example 1: ionic status bar color

//in config.xml

...
<preference name="StatusBarBackgroundColor" value="#2873ED" />
<preference name="StatusBarOverlaysWebView" value="true" />
...

Example 2: ionic mobile top barnot visible

if(this.platform.is('android')) {
  this.statusBar.styleLightContent();
}