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Sometimes, we need to get a resource from the Android resource library without knowing its name. Perhaps we have R.id.data1 through R.id.data9 and want to fetch all 9 of them without hardcoding each one.

This has been possible since API 1, through the use of getIdentifier(). I will start off by saying that this is not as efficient as referencing R, so it should be used ONLY in the event that you cannot be sure of the ID you are fetching.

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