数据不显示在实时数据库中

Question

我按照文档完成了所有步骤，实时数据库的读写工作正常，但数据没有显示在数据库中，如何解决这个问题？

classpath 'com.google.gms:google-services:4.3.13'
implementation 'com.google.firebase:firebase-database-ktx:20.0.5'

private fun readMessageOnRD(){
    myRef.addValueEventListener(object : ValueEventListener {
        override fun onDataChange(snapshot: DataSnapshot) {
            val value = snapshot.getValue<String>()
            Log.d("TAG", "value of firebase is $value")
        }

        override fun onCancelled(error: DatabaseError) {
            Log.w("TAG", "onCancelled: " ,error.toException())
        }
    })
}

private fun writeMessageOnRD(value : String){
    database = Firebase.database
    myRef = database.getReference("message")
    Log.d("TAG","write value is $value")
    myRef.setValue(value)
        .addOnSuccessListener {
            Log.d("TAGggwp", "writeMessageOnRD: $it")
        }
        .addOnFailureListener {
            Log.d("TAGggwp", "exeption is $it")
        }
}

IconButton(
    modifier = Modifier
        .align(Alignment.Bottom)
        .weight(0.10f)
        .padding(bottom = 4.dp),
    onClick = {
        if (textFieldState.isNotEmpty()) {
            writeMessageOnRD(textFieldState)
            readMessageOnRD()
        }
    }

"rules": {
  ".read": "true",
  ".write": "true",
}

Answer 1

我认为您没有使用您的数据库 url，添加此行

val database = Firebase.database("your database URL").getReference("message")