0
所以我有一组孩子,我想获取值,但关键可能是任何东西,所以我需要使用一个变量。但是,当我运行这个代码时,我得到值为空值?String string =“”+ childDataSnapshot.child(key).getValue())
任何想法我做错了什么? '*********
public void dataSnapshotSift(DataSnapshot dataSnapshot){
for (DataSnapshot childDataSnapshot : dataSnapshot.getChildren()){
String key = childDataSnapshot.getKey();
String value = "" + childDataSnapshot.child(key).getValue();
Log.v("Firebase: ", key);
Log.v("Firebase: ", "" + childDataSnapshot.child(key).getValue());
}
}
' ***********这是基于
07-31 23:48:23.702 V/Firebase poss count:: 3
07-31 23:48:23.702 V/FireBase:: Value: DataSnapshot { key = T2, value = {33=P00006, 4=P00003, 1=P00001} }
07-31 23:48:23.702 V/Firebase:: 1
07-31 23:48:23.702 V/Firebase:: null
07-31 23:48:23.702 V/Firebase:: 4
07-31 23:48:23.702 V/Firebase:: null
07-31 23:48:23.702 V/Firebase:: 33
07-31 23:48:23.702 V/Firebase:: null
仁,你就像火力的福尔摩斯和现在你已经把它出来我觉得像华生医生。它如此简单,如此明显。谢谢。 –