Is there any intent/event that i can listen to when user slide out the keyboard on a phone with keyboard?
Thank you.
in your Manifest file, add this to your activity definition:
android:configChanges="keyboard|keyboardHidden"  
and in your Activity java file, override the method onConfigurationChanged:
@Override
public void onConfigurationChanged(Configuration newConfig) {
    super.onConfigurationChanged(newConfig);
    if(newConfig.hardKeyboardHidden == Configuration.HARDKEYBOARDHIDDEN_NO) {
       //handle keyboard slide out event
    }
    else if(newConfig.hardKeyboardHidden == Configuration.HARDKEYBOARDHIDDEN_YES)
        //handle keyboard slide in event
    }
}
when a keyboard event fires off in this activity, this method will be called and you can do whatever you want.
There is an ACTION_CONFIGURATION_CHANGED broadcast you can listen to. The solutions provided by @schwiz and @binnyb have a major flaw -- they force you to deal with all of the actual work of the configuration change. That may be necessary, but you are far better served not overriding android:configChanges, and using onSaveInstanceState() and onRetainNonConfigurationInstance() for handling the actual configuration change.
Yes in your Activity override onConfigurationChanged()
public void onConfigurationChanged(Configuration newConfig){
   if(newConfig.hardKeyboardHidden == Configuration.HARDKEYBOARDHIDDEN_NO){
       //slideout detected
   }
}