在 Android 中获取 Firebase 存储的权限错误？

Question

所以我使用以下代码 sn-p 将文件上传到 Firebase 存储：

FirebaseStorage storage = FirebaseStorage.getInstance();
    StorageReference parentReference = storage.getReference();
    Uri file = Uri.fromFile(new File(PATH));
    StorageReference childReference = parentReference.child("kas_data");
    UploadTask uploadTask = childReference.putFile(file);
    uploadTask.addOnFailureListener(new OnFailureListener() {
        @Override
        public void onFailure(@NonNull Exception exception) {
            //
        }
    }).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
        @Override
        public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
            //
        }
    });

上传成功。检查 firebase 控制台，我看到文件已成功上传。现在我想用下面的代码sn-p下载它：

FirebaseStorage storage = FirebaseStorage.getInstance();
        StorageReference parentReference = storage.getReference();
        StorageReference childReference = parentReference.child("kas_data");
        File localFile = new File(PATH);
        childReference.getFile(localFile).addOnSuccessListener(new OnSuccessListener<FileDownloadTask.TaskSnapshot>() {
            @Override
            public void onSuccess(FileDownloadTask.TaskSnapshot taskSnapshot) {
                //
            }
        }).addOnFailureListener(new OnFailureListener() {
            @Override
            public void onFailure(@NonNull Exception exception) { 
                //
            }
        });

但我收到以下错误消息：

com.google.firebase.storage.StorageException: User does not have permission to access this object.

当我在 Firebase 存储规则部分使用此规则时：

rules_version = '2';
service firebase.storage {
    match /{allPaths=**} {
        allow read, write;
    }
}

我该如何解决这个问题？

Answer 1

你可以直接使用 Glide 下载图片，只需添加：

annotationProcessor 'com.github.bumptech.glide:compiler:4.11.0'
    implementation 'com.github.bumptech.glide:glide:4.11.0'

然后转到您的应用 build.gradle

StorageReference mStorageRef = FirebaseStorage.getInstance().getReference();
            final StorageReference imgRef = mStorageRef.child("Imagesfolder/"+"Imagename"+"");
            GlideApp.with(showProducts.this)
                    .load(imgRef)
                    .into(imageview);

这会将图像下载到图像视图中！

Answer 2

我真的不确定您的上传任务是如何成功的。您需要在规则中添加条件：

match /{allPaths=**} {
    allow read, write: if true;
    //Or whatever condition you want to allow/disallow uploading and downloading
}