質問編集履歴
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どうすればFirebaseのデータだけ返却できますか？
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UserRepo側
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```Kotlin
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fun getUser(userId: String): User? {
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var data: User? = null
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}
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return data
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}
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```
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activity側
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```Koltin
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val userData = UserRepository.getUser(user.uid)
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```
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