新增一個集合

新增文件

最後會這樣顯示

再利用下列程式碼呈現出來

private fun readSingleData(){

    val db = FirebaseFirestore.getInstance()

    db.collection("Data").document("HeSKUUNFDEzi007cuFGG").get()

        .addOnSuccessListener { result ->
            tv_name_right.text = result.data?.get("name").toString()
            tv_school_right.text = result.data?.get("school").toString()
            tv_email_right.text = result.data?.get("email").toString()
            Toast.makeText(activity, "讀取成功", Toast.LENGTH_SHORT).show()
        }

        .addOnFailureListener{
            Log.v("test__",it.toString())
            Toast.makeText(activity,"讀取失敗", Toast.LENGTH_SHORT).show()
        }
}