为什么我无法从 Firebase 存储中获取数据？

Question

我需要从 Firebase 存储和 Firestore 数据库获取数据。 我从 Firestore 数据库（Firebase 存储中的图像和歌曲的链接）获取文本数据，但我无法在我的应用程序中检索歌曲和 stream。 我从 logcat 收到错误消息：

E/StorageUtil：获取令牌时出错 java.util.concurrent.ExecutionException：com.google.firebase.internal.api.FirebaseNoSignedInUserException：请在尝试获取令牌之前先登录。

但我不会在我的应用程序中登录用户。

logcat也写错了：

E/StorageException: {  "error": {    "code": 404,    "message": "Not Found."  }}
    java.io.IOException: {  "error": {    "code": 404,    "message": "Not Found."  }}

日志：

2022-02-17 06:03:27.264 14195-14268/com.example.clearmind1 E/StorageUtil: error getting token java.util.concurrent.ExecutionException: com.google.firebase.internal.api.FirebaseNoSignedInUserException: Please sign in before trying to get a token.
2022-02-17 06:03:27.265 14195-14268/com.example.clearmind1 W/NetworkRequest: no auth token for request
2022-02-17 06:03:27.265 14195-14268/com.example.clearmind1 W/NetworkRequest: No App Check token for request.
2022-02-17 06:03:27.272 14195-14270/com.example.clearmind1 E/StorageUtil: error getting token java.util.concurrent.ExecutionException: com.google.firebase.internal.api.FirebaseNoSignedInUserException: Please sign in before trying to get a token.
2022-02-17 06:03:27.273 14195-14270/com.example.clearmind1 W/NetworkRequest: no auth token for request
2022-02-17 06:03:27.273 14195-14270/com.example.clearmind1 W/NetworkRequest: No App Check token for request.
2022-02-17 06:03:27.277 14195-14276/com.example.clearmind1 E/StorageUtil: error getting token java.util.concurrent.ExecutionException: com.google.firebase.internal.api.FirebaseNoSignedInUserException: Please sign in before trying to get a token.
2022-02-17 06:03:27.277 14195-14276/com.example.clearmind1 W/NetworkRequest: no auth token for request
2022-02-17 06:03:27.277 14195-14276/com.example.clearmind1 W/NetworkRequest: No App Check token for request.
2022-02-17 06:03:27.799 14195-14270/com.example.clearmind1 E/StorageException: StorageException has occurred.
    Object does not exist at location.
     Code: -13010 HttpResult: 404
2022-02-17 06:03:27.799 14195-14276/com.example.clearmind1 E/StorageException: StorageException has occurred.
    Object does not exist at location.
     Code: -13010 HttpResult: 404
2022-02-17 06:03:27.801 14195-14276/com.example.clearmind1 E/StorageException: {  "error": {    "code": 404,    "message": "Not Found."  }}
    java.io.IOException: {  "error": {    "code": 404,    "message": "Not Found."  }}
        at com.google.firebase.storage.network.NetworkRequest.parseResponse(NetworkRequest.java:445)
        at com.google.firebase.storage.network.NetworkRequest.parseErrorResponse(NetworkRequest.java:462)
        at com.google.firebase.storage.network.NetworkRequest.processResponseStream(NetworkRequest.java:453)
        at com.google.firebase.storage.network.NetworkRequest.performRequest(NetworkRequest.java:272)
        at com.google.firebase.storage.network.NetworkRequest.performRequest(NetworkRequest.java:289)
        at com.google.firebase.storage.internal.ExponentialBackoffSender.sendWithExponentialBackoff(ExponentialBackoffSender.java:76)
        at com.google.firebase.storage.internal.ExponentialBackoffSender.sendWithExponentialBackoff(ExponentialBackoffSender.java:68)
        at com.google.firebase.storage.GetDownloadUrlTask.run(GetDownloadUrlTask.java:77)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
        at java.lang.Thread.run(Thread.java:920)
2022-02-17 06:03:27.801 14195-14264/com.example.clearmind1 E/StorageException: StorageException has occurred.
    Object does not exist at location.
     Code: -13010 HttpResult: 404
2022-02-17 06:03:27.802 14195-14264/com.example.clearmind1 E/StorageException: {  "error": {    "code": 404,    "message": "Not Found."  }}
    java.io.IOException: {  "error": {    "code": 404,    "message": "Not Found."  }}
        at com.google.firebase.storage.network.NetworkRequest.parseResponse(NetworkRequest.java:445)
        at com.google.firebase.storage.network.NetworkRequest.parseErrorResponse(NetworkRequest.java:462)
        at com.google.firebase.storage.network.NetworkRequest.processResponseStream(NetworkRequest.java:453)
        at com.google.firebase.storage.network.NetworkRequest.performRequest(NetworkRequest.java:272)
        at com.google.firebase.storage.network.NetworkRequest.performRequest(NetworkRequest.java:289)
        at com.google.firebase.storage.internal.ExponentialBackoffSender.sendWithExponentialBackoff(ExponentialBackoffSender.java:76)
        at com.google.firebase.storage.internal.ExponentialBackoffSender.sendWithExponentialBackoff(ExponentialBackoffSender.java:68)
        at com.google.firebase.storage.GetDownloadUrlTask.run(GetDownloadUrlTask.java:77)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
        at java.lang.Thread.run(Thread.java:920)
2022-02-17 06:03:27.809 14195-14270/com.example.clearmind1 E/StorageException: {  "error": {    "code": 404,    "message": "Not Found."  }}
    java.io.IOException: {  "error": {    "code": 404,    "message": "Not Found."  }}
        at com.google.firebase.storage.network.NetworkRequest.parseResponse(NetworkRequest.java:445)
        at com.google.firebase.storage.network.NetworkRequest.parseErrorResponse(NetworkRequest.java:462)
        at com.google.firebase.storage.network.NetworkRequest.processResponseStream(NetworkRequest.java:453)
        at com.google.firebase.storage.network.NetworkRequest.performRequest(NetworkRequest.java:272)
        at com.google.firebase.storage.network.NetworkRequest.performRequest(NetworkRequest.java:289)
        at com.google.firebase.storage.internal.ExponentialBackoffSender.sendWithExponentialBackoff(ExponentialBackoffSender.java:76)
        at com.google.firebase.storage.internal.ExponentialBackoffSender.sendWithExponentialBackoff(ExponentialBackoffSender.java:68)
        at com.google.firebase.storage.GetDownloadUrlTask.run(GetDownloadUrlTask.java:77)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
        at java.lang.Thread.run(Thread.java:920)
2022-02-17 06:03:27.955 14195-14268/com.example.clearmind1 E/StorageException: StorageException has occurred.
    Object does not exist at location.
     Code: -13010 HttpResult: 404
2022-02-17 06:03:27.955 14195-14268/com.example.clearmind1 E/StorageException: {  "error": {    "code": 404,    "message": "Not Found."  }}
    java.io.IOException: {  "error": {    "code": 404,    "message": "Not Found."  }}
        at com.google.firebase.storage.network.NetworkRequest.parseResponse(NetworkRequest.java:445)
        at com.google.firebase.storage.network.NetworkRequest.parseErrorResponse(NetworkRequest.java:462)
        at com.google.firebase.storage.network.NetworkRequest.processResponseStream(NetworkRequest.java:453)
        at com.google.firebase.storage.network.NetworkRequest.performRequest(NetworkRequest.java:272)
        at com.google.firebase.storage.network.NetworkRequest.performRequest(NetworkRequest.java:289)
        at com.google.firebase.storage.internal.ExponentialBackoffSender.sendWithExponentialBackoff(ExponentialBackoffSender.java:76)
        at com.google.firebase.storage.internal.ExponentialBackoffSender.sendWithExponentialBackoff(ExponentialBackoffSender.java:68)
        at com.google.firebase.storage.GetDownloadUrlTask.run(GetDownloadUrlTask.java:77)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
        at java.lang.Thread.run(Thread.java:920)

这里我从服务器获取文本数据：

ArrayList childItemList = new ArrayList<>();
FirebaseFirestore db = FirebaseFirestore.getInstance();
db.collection(category).get().addOnCompleteListener(new OnCompleteListener<QuerySnapshot>() {
    @Override
    public void onComplete(@NonNull Task<QuerySnapshot> task) {
        if (task.isSuccessful()) {
            progressDialog.dismiss();
            for (QueryDocumentSnapshot document : task.getResult()) {
                Log.d(TAG, document.getId() + " => " + document.getData());
                ChildItem childItem = new ChildItem();
                childItem.setTrackTitle(document.getString("title"));
                childItem.setAuthor(document.getString("author"));
                childItem.setDuration(document.getString("duration"));
                childItem.setImage(document.getString("image"));
                childItem.setTrack(document.getString("track"));
                childItemList.add(childItem);
            }
        } else {
            Log.w(TAG, "Error getting documents.", task.getException());
            Toast.makeText(BrowseTracksActivity.this, task.getException() + "", Toast.LENGTH_SHORT);
        }
        childItemList.add(getDefaultChildItem());
        setAdapter();
    }
});

在这里，我正在尝试 stream 歌曲（我通过意图将歌曲链接发送到另一个活动）：

Intent intent=getIntent();
music= new MediaPlayer();
music.setAudioStreamType(AudioManager.STREAM_MUSIC);
try {
    String s=intent.getStringExtra("track");
    music.setDataSource(intent.getStringExtra("track"));
    music.prepare();
    music.start();

    Toast.makeText(this, "Audio started playing..", Toast.LENGTH_SHORT).show();
} catch (IOException e) {
    // this line of code is use to handle error while playing our audio file.
    Toast.makeText(this, "Error found is " + e, Toast.LENGTH_SHORT).show();
}

Answer 1

该错误告诉您需要先登录您的用户。 如果您不想让您的用户登录，但希望他们访问数据库，您可以通过匿名登录给他们一个令牌。 这样，您就不必收集身份验证数据，例如 email、密码、社交登录等。

您可以在不中断流程的情况下在主要活动中登录您的用户。

这是代码

mAuth.signInAnonymously()
    .addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
        @Override
        public void onComplete(@NonNull Task<AuthResult> task) {
            if (task.isSuccessful()) {
                // Sign in success, User can now write and read the database.
                Log.d(TAG, "signInAnonymously:success");
                FirebaseUser user = mAuth.getCurrentUser();
                updateUI(user);
            } else {
                // If sign in fails, display a message to the user.
                Log.w(TAG, "signInAnonymously:failure", task.getException());
                Toast.makeText(AnonymousAuthActivity.this, "Authentication failed.",
                        Toast.LENGTH_SHORT).show();
                updateUI(null);
            }
        }
    });

在 onCreate 方法中初始化 FirebaseAuth。

这里是 firebase 文档Firebase 匿名登录 Android

不要忘记更改数据库规则

"rules": {
".read": "auth != null",
".write": "auth != null"

} }

或者...

您可以允许所有用户读取和写入您的数据库（不推荐），只需将您的规则更改为

"rules": {
".read": "auth == null",
".write": "auth == null"}