android - onConfigurationChange() is not called -

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I've found that in my app, change to configuration () is not a call. In the manifest, I enter: 

  android: configChanges = "keyboardHidden"   
 I want to change the configuration when the keyboard is hidden To call. Why is this not called?  
   
 The method is not called when I force to hide the keyboard?   
 
 
 This question has been asked many times, a common answer is:  
 < Code> android: configChanges = "Orientation: KeyboardHind" instead of "AdWords": configChanges = "keyboardHidden"

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