PhoneCallbacks Firebase :: Class 'PhoneCallbacks' 不是抽象的，也没有实现

Question

好的，所以我从另一个开发人员那里得到了这段代码（我知道 PHP，网络开发，但我对 android 和 firebase 没有那么多经验）他给了我这段代码和一些过时的 SDK 和库，所以我更新了它们，但现在其中一个 kotlin 文件不断抛出这个错误，我不知道如何修复它，有人能帮忙吗

class PhoneCallbacks(private val listener : PhoneCallbacksListener) : PhoneAuthProvider.OnVerificationStateChangedCallbacks() {

    interface PhoneCallbacksListener {
        fun onVerificationCompleted(credential: PhoneAuthCredential?)
        fun onVerificationFailed(exception: FirebaseException?)
        fun onCodeSent(
                verificationId: String?,
                token: PhoneAuthProvider.ForceResendingToken?
        )
    }

    override fun onVerificationCompleted(phoneAuthCredential: PhoneAuthCredential?) {
        listener.onVerificationCompleted(phoneAuthCredential)
    }

    override fun onVerificationFailed(exception: FirebaseException?) {
        listener.onVerificationFailed(exception)
    }

    override fun onCodeSent(verificationId: String?, token: PhoneAuthProvider.ForceResendingToken?) {
        listener.onCodeSent(verificationId,token)
    }
}

错误：

PhoneCallBacks.kt: (6, 1): Class 'PhoneCallbacks' is not abstract and does not implement abstract base class member public abstract fun onVerificationCompleted(p0: PhoneAuthCredential): Unit defined in com.google.firebase.auth.PhoneAuthProvider.OnVerificationStateChangedCallbacks

Answer 1

您已将 onVerificationCompleted 声明为：

override fun onVerificationCompleted(phoneAuthCredential: PhoneAuthCredential?) {

但实际的 interface 将 onVerificationCompleted 定义为非可选的，因此：

override fun onVerificationCompleted(phoneAuthCredential: PhoneAuthCredential) {

PhoneCallbacks Firebase :: Class 'PhoneCallbacks' 不是抽象的，也没有实现

PhoneCallbacks Firebase :: Class 'PhoneCallbacks' is not abstract and does not implement

android

kotlin

firebase

firebase-authentication