下面是允許用戶將數(shù)據(jù)存儲到 Firestore 的代碼。問題是，所有登錄應(yīng)用程序的用戶都可以查看上傳的數(shù)據(jù)。我怎么能只允許當(dāng)前登錄的用戶只存儲他們帳戶的數(shù)據(jù)？使用 Firebase 數(shù)據(jù)庫，我使用以下代碼（有效，但不適用于 Firestore）FirebaseUser 用戶 = FirebaseAuth.getInstance().getCurrentUser(); String userId=user.getUid(); mDatabaseRef = FirebaseDatabase.getInstance().getReference(FB_DATABASE_PATH).child(userId);上述代碼行允許僅為登錄用戶存儲和檢索數(shù)據(jù)。因此，數(shù)據(jù)僅對他們而言是唯一的。我如何為 Firestore 復(fù)制它？ fetch=findViewById(R.id.fetchDocument); firestore = FirebaseFirestore.getInstance(); upload =findViewById(R.id.uploadText); upload.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { POJO pojo = new POJO(); pojo.setValue("Hello World"); //below code creates collection, creates a inner doc. and uploads the value (pojo) firestore.collection("RootCollection").document("MyDoc") .set(pojo).addOnSuccessListener(new OnSuccessListener<Void>() { @Override public void onSuccess(Void aVoid) { //gets called if upload is successful Toast.makeText(ichild.this,"Upload is successful", Toast.LENGTH_SHORT).show(); } }).addOnFailureListener(new OnFailureListener() { @Override public void onFailure(@NonNull Exception e) { Toast.makeText(ichild.this,"Upload is not successful" + e.getMessage(), Toast.LENGTH_SHORT).show(); } }); } }); fetch.setOnClickListener(new View.OnClickListener() {
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如何使用 Firestore 僅存儲當(dāng)前登錄用戶的數(shù)據(jù)
如果將 傳遞uid給該document()方法，則可以實(shí)現(xiàn)相同的目的。所以 Firebase 實(shí)時數(shù)據(jù)庫中使用了以下幾行代碼：
FirebaseUser user = FirebaseAuth.getInstance().getCurrentUser();
String userId = user.getUid();
mDatabaseRef = FirebaseDatabase.getInstance().getReference(FB_DATABASE_PATH).child(userId);
在 Firestore 中等效于：
String uid = FirebaseAuth.getInstance().getCurrentUser().getUid();
FirebaseFirestore rootRef = FirebaseFirestore.getInstance();
DocumentReference uidRef = rootRef.collection("users").document(uid);
POJO pojo = new POJO();
uidRef.set(pojo);
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