Android 赋值不是表达式,在此上下文中只允许表达式。我知道它已经讨论过了,但没有';丁字裤
赋值不是表达式,在这个上下文中只允许表达式。我不知道如何解决这个问题Android 赋值不是表达式,在此上下文中只允许表达式。我知道它已经讨论过了,但没有';丁字裤,android,kotlin,android-studio-3.4,Android,Kotlin,Android Studio 3.4,赋值不是表达式,在这个上下文中只允许表达式。我不知道如何解决这个问题 private fun uploadImageToFirebaswStorage(){ if (selectedphotoUri = null) return val filename = UUID.randomUUID().toString() val ref = FirebaseStorage.getInstance().getReference("/images/$filename")
private fun uploadImageToFirebaswStorage(){
if (selectedphotoUri = null) return
val filename = UUID.randomUUID().toString()
val ref = FirebaseStorage.getInstance().getReference("/images/$filename")
ref.putFile(selectedphotoUri!!)
.addOnSuccessListener {
Log.d("Register","Successfully uploaded image: ${it.metadata?.path}")}
selectedphotoUri=null
是一个赋值。最有可能的情况是,您想要selectedphotoUri==null
(两个等号),这是相等表达式。假设您想要执行Commonware指出的相等检查,另一个选项是使用公共
val值=
价值?让我们{
…//如果不为null,则执行此块}
private fun uploadImageToFirebaswStorage(){
selectedphotoUri?.let {
val filename = UUID.randomUUID().toString()
val ref = FirebaseStorage.getInstance().getReference("/images/$filename")
ref.putFile(selectedphotoUri!!)
.addOnSuccessListener {
Log.d("Register","Successfully uploaded image: ${it.metadata?.path}")
}
}
}