Efficient saving of Android AdMob interstitials -

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scenario: activity initializes , loads admob interstitial. activity b starts on top of a, can cause destroyed reclaim resources. when user comes activity a, needs recreated , interstitial downloaded again.

what best way preserve downloaded interstitial?

the method onsaveinstancestate seems unsuitable this.

the best solution have single activity , use 2 fragments within activity. way interstitial never destroyed.


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