java - 如何检查数据是否已成功插入 Firebase 数组中

Question

我正在使用以下代码在 Firebase 数据库中从 json 响应插入一些数据到数组中

JSONArray arr = new JSONArray(result);
String[] stocks = new String[arr.length()];

for(int i=0;i<arr.length();i++){

   JSONObject obj = arr.getJSONObject(i);
   mDatabase= FirebaseDatabase.getInstance().getReference().child("books");
   atabaseReference newBid=mDatabase.push();
   newBid.child("usr_id").setValue(obj.getString("user_id"));
   newBid.child("usr_fullNme").setValue(obj.getString("first_name")+" "+obj.getString("last_name"));
   newBid.child("usr_mobile").setValue(obj.getString("user_mobile"));
   newBid.child("usr_avatr").setValue(obj.getString("src"));
  }

如何检查以上操作是否成功

Answer 1

您可以使用Hashmap并执行以下操作:

Map<String, Object> userValues = new HashMap<>();
  userValues.put("usr_id", obj.getString("user_id"));
  userValues.put("usr_fullNme",obj.getString("first_name")+" "+obj.getString("last_name"));
  userValues.put("usr_mobile", obj.getString("user_mobile"));
  userValues.put("usr_avatr",  obj.getString("src"));

然后使用setValue():

mDatabase= FirebaseDatabase.getInstance().getReference().child("books");
String newBid = mDatabase.push().getKey();
mDatabase.child(newBid).setValue(userValues, new DatabaseReference.CompletionListener() {
        @Override
        public void onComplete(DatabaseError databaseError, DatabaseReference databaseReference) {
           System.out.println(databaseError);
        }
    });

来自docs :

public void setValue (Object value, DatabaseReference.CompletionListener listener)

Set the data at this location to the given value. Passing null to setValue() will delete the data at the specified location. The native types accepted by this method for the value correspond to the JSON types:

• Boolean
• Long
• Double
• String
• Map
• List