Firestore获取DocumentSnapshot的字段值 [英] Firestore get DocumentSnapshot's field's value
本文介绍了Firestore获取DocumentSnapshot的字段值的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
如果我有一个Firebase Firestore数据库，该数据库为与右侧集合相对应的文档检索了DocumentSnapshot并将其存储在document变量中，那么如何在以下位置检索该DocumentSnapshot中的值:字段用户名"?该字段具有字符串值.
If I have a Firebase Firestore database which I have retrieved a DocumentSnapshot for the document corresponding to the collection on the right and stored in a document variable, then how could I retrieve the value in that DocumentSnapshot at the field "username"? The field has a string value.
推荐答案
DocumentSnapshot has a method getString() which takes the name of a field and returns its value as a String.
String value = document.getString("username");
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