[英]How to send image download URL from FireBase Storage to SQLServer Database?
[英]How to retrieve the download URL of an image from Firebase Storage?
我正在观看有关Firebase存储的旧教程。 该getDownloadUrl()
从法UploadTask.TaskSnapshot
不再存在,并且文件未能清楚给我。
到目前为止,我已经实现了上载过程,并且可以确认它可以正常工作,但是获取URL是一件很痛苦的事情,我无法按照他们的方式解释如何做,因为:
1)创建Task<Uri> urlTask = uploadTask.add[...]()
将在IDE上导致以下错误:
我不明白,因为它是在文档中指定的。
2)与查看控制台上显示的内容相比,使用reference.getDownloadUrl()
将显示与控制台上显示的URL不同的URL。 控制台显示的下载URL是
而记录将显示
com.google.android.gms.tasks.xxx@xxxxxxx
我目前的完整代码:
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,并且规则是
service firebase.storage {
match /b/{bucket}/o {
match /{allPaths=**} {
allow read, write: if request.auth != null;
}
}
}
我付出了努力,浪费了更多时间,但这是更通用,更可行的解决方案
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 + "%");
}
});
}
}
您有“ Permission denied error
这意味着您没有权限访问Firebase中的数据。 请在这里检查
如果您的安全规则是公开的,那么这里不需要许可;如果它不是公开的或不安全的,那么您需要先通过auth登录,然后才能从firebase中获取数据;如果登录成功,则可以继续工作。
选中它可以帮助您了解Firebase安全规则。
经过多次尝试,我设法解决了这个问题。 这是实现:
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();
}
});
upload.continueWithTask(new Continuation<UploadTask.TaskSnapshot, Task<Uri>>() {
@Override
public Task<Uri> then(@NonNull Task<UploadTask.TaskSnapshot> task) throws Exception {
if (!task.isSuccessful()) {
throw task.getException();
}
return reference.getDownloadUrl();
}
}).addOnCompleteListener(new OnCompleteListener<Uri>() {
@Override
public void onComplete(@NonNull Task<Uri> task) {
if (task.isSuccessful()) {
Uri downloadUrl = task.getResult();
ChatroomMessage message = new ChatroomMessage(null, mUsername, downloadUrl.toString());
mMessagesDatabaseReference.push().setValue(message);
Toast.makeText(MainActivity.this, "Image uploaded!", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(MainActivity.this, task.getException().toString(), Toast.LENGTH_SHORT).show();
}
}
});
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