java - 如何从 Firebase 存储中检索图像的下载 URL？

Question

我正在观看有关 Firebase 存储的旧教程。 getDownloadUrl()方法来自 UploadTask.TaskSnapshot不再存在，documentation我不清楚。

到目前为止，我实现的是上传过程，我可以确认它有效，但获取 URL 很痛苦，我无法按照他们解释的方式进行操作，因为:

1) 创建 Task<Uri> urlTask = uploadTask.add[...]()将导致在 IDE 上出现以下错误:

我不明白，因为它在文档中指定。

2) 使用 reference.getDownloadUrl()当看到上传图像的详细信息时，将显示与控制台上显示的不同的 URL。控制台显示的下载地址是

https://firebasestorage.googleapis.com/v0/b/chatroom-e44e6.appspot.com/o/chat_photos%2F73185640?alt=media&token=xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx

登录时会显示

com.google.android.gms.tasks.xxx@xxxxxxx

目前我的完整代码:

if (requestCode == RC_PHOTO_PICKER) {
    if (data != null) {
        Toast.makeText(MainActivity.this, "Uploading...", Toast.LENGTH_SHORT).show();

        Uri file = data.getData();
        final StorageReference reference = mPhotoStorageReference.child(file.getLastPathSegment());
        UploadTask upload = reference.putFile(file);

        upload.addOnFailureListener(this, new OnFailureListener() {
            @Override
            public void onFailure(@NonNull Exception e) {
                Toast.makeText(MainActivity.this, "Image could not be uploaded: " + e.getMessage(), Toast.LENGTH_LONG).show();
            }
        }).addOnCompleteListener(this, new OnCompleteListener<UploadTask.TaskSnapshot>() {
            @Override
            public void onComplete(@NonNull Task<UploadTask.TaskSnapshot> task) {
                ChatroomMessage message = new ChatroomMessage(null, mUsername, reference.getDownloadUrl().toString()); // <- com.google.android.gms.tasks.xxx@xxxxxxx
                mMessagesDatabaseReference.push().setValue(message);
                Toast.makeText(MainActivity.this, "Image uploaded!", Toast.LENGTH_SHORT).show();
            }
        });
    }
}

我的应用程序已经实现了 Firebase UI 来处理登录操作，规则是

service firebase.storage {
  match /b/{bucket}/o {
    match /{allPaths=**} {
      allow read, write: if request.auth != null;
    }
  }
}

Answer 1

我付出了努力并浪费了更多时间，但这是更通用和有效的解决方案

    private void uploadImage() {

    if (filePath != null) {
        final ProgressDialog progressDialog = new ProgressDialog(this);
        progressDialog.setTitle("Uploading...");
        progressDialog.show();
        final StorageReference ref = storageReference.child("images/" +currentFirebaseUser.getUid() + "");

        ref.putFile(filePath)
                .addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
                    @Override
                    public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
                        progressDialog.dismiss();

                        Task<Uri> urlTask = taskSnapshot.getStorage().getDownloadUrl();
                        while (!urlTask.isSuccessful());
                        Uri downloadUrl = urlTask.getResult();
                        Log.e("uri12",downloadUrl+"This is uri of image download");
                        Toast.makeText(AddItemActivity.this, "Uploaded", Toast.LENGTH_SHORT).show();
                    }
                })
                .addOnFailureListener(new OnFailureListener() {
                    @Override
                    public void onFailure(@NonNull Exception e) {
                        progressDialog.dismiss();
                        Toast.makeText(AddItemActivity.this, "Failed " + e.getMessage(), Toast.LENGTH_SHORT).show();
                    }
                })
                .addOnProgressListener(new OnProgressListener<UploadTask.TaskSnapshot>() {
                    @Override
                    public void onProgress(UploadTask.TaskSnapshot taskSnapshot) {
                        double progress = (100.0 * taskSnapshot.getBytesTransferred() / taskSnapshot
                                .getTotalByteCount());
                        progressDialog.setMessage("Uploaded " + (int) progress + "%");
                    }
                });
    }
}