我正试图获得＆＃34;长期持续下载链接＆＃34;到我们的Firebase存储桶中的文件。 我已将此权限更改为
service firebase.storage {
match /b/project-xxx.appspot.com/o {
match /{allPaths=**} {
allow read, write;
}
}
}
我的javacode看起来像这样：
private String niceLink (String date){
String link;
// Points to the root reference
StorageReference storageRef = FirebaseStorage.getInstance().getReference();
StorageReference dateRef = storageRef.child("/" + date+ ".csv");
link = dateRef.getDownloadUrl().toString();
return link;
}
当我运行这个时，我得到了类似的uri链接 com.google.android.gms.tasks.zzh@xxx
问题1。我可以通过以下方式获得类似于以下内容的下载链接： https://firebasestorage.googleapis.com/v0/b/project-xxxx.appspot.com/o/20-5-2016.csv?alt=media&token=b5d45a7f-3ab7-4f9b-b661-3a2187adxxxx
当我尝试获取上面的链接时，我在返回之前更改了最后一行，如下所示：
private String niceLink (String date){
String link;
// Points to the root reference
StorageReference storageRef = FirebaseStorage.getInstance().getReference();
StorageReference dateRef = storageRef.child("/" + date+ ".csv");
link = dateRef.getDownloadUrl().getResult().toString();
return link;
}
但是当这样做时我得到403错误，并且应用程序崩溃了。 consol告诉我这是bc用户未登录/ auth。 ＆＃34;请在请求令牌＆＃34;
之前登录问题2. 如何解决此问题？
答案 0 :(得分：14)
当您致电getDownloadUrl()时，该呼叫是异步的，您必须订阅成功回调才能获得结果：
// Calls the server to securely obtain an unguessable download Url
private void getUrlAsync (String date){
// Points to the root reference
StorageReference storageRef = FirebaseStorage.getInstance().getReference();
StorageReference dateRef = storageRef.child("/" + date+ ".csv");
dateRef.getDownloadUrl().addOnSuccessListener(new OnSuccessListener<Uri>()
{
@Override
public void onSuccess(Uri downloadUrl)
{
//do something with downloadurl
}
});
}
这将返回一个公开的无法下载的网址。如果你刚刚上传了一个文件，那么这个公共网址将在上传的成功回调中（你上传后不需要再调用另一种异步方法）。
但是，如果你想要的只是参考的String表示，你只需拨打.toString()
// Returns a Uri of the form gs://bucket/path that can be used
// in future calls to getReferenceFromUrl to perform additional
// actions
private String niceRefLink (String date){
// Points to the root reference
StorageReference storageRef = FirebaseStorage.getInstance().getReference();
StorageReference dateRef = storageRef.child("/" + date+ ".csv");
return dateRef.toString();
}
答案 1 :(得分：1)
// Firebase简单且可工作的上载和下载。
@Override
**Code Format:**
Home Page : It has some Game
The router has 4 different subpages :
Default Home Page that will show game, and the rest other pages are based on the dynamic link provided Ex: Page_1, Page_2, and Page_3.
**What am I looking help or guidance?**
The suggestion I am looking is to avoid landing in home page (game landing page) when dynamic link is clicked from web url of the mobile.
void main() {
runApp(new MaterialApp(
title: 'Game Name',
home: _MainScreen(),
routes: <String, WidgetBuilder>{
'/NSef': (BuildContext context) => new SocialAppsPage(
"page-1-title",
"page-1"),
'/82AY': (BuildContext context) => new SocialAppsPage(
"page-2-title",
"page-2"),
'/DW7Y': (BuildContext context) => new SocialAppsPage(
"page-3-title",
"page-3"),
'/core': (BuildContext context) => new GameHomePage()
}, ));
}
class _MainScreen extends StatefulWidget {
@override
State<StatefulWidget> createState() => new _MainScreenState();
}
class _MainScreenState extends State<_MainScreen> with WidgetsBindingObserver {
Timer _timerLink;
@override
BuildContext get context => super.context;
@override
void initState() {
WidgetsBinding.instance.addObserver(this);
super.initState();
}
@override
void didChangeAppLifecycleState(AppLifecycleState state) {
if (state == AppLifecycleState.resumed) {
_timerLink = new Timer(const Duration(milliseconds: 1), () {
_retrieveDynamicLink();
});
}
}
Future<void> _retrieveDynamicLink() async {
final PendingDynamicLinkData data =
await FirebaseDynamicLinks.instance.retrieveDynamicLink();
final Uri deepLink = data?.link;
if (deepLink != null) {
Navigator.pushNamed(context, deepLink.path);
} else {
Navigator.pushNamed(context, "/core");
}
}
@override
void dispose() {
WidgetsBinding.instance.removeObserver(this);
if (_timerLink != null) {
_timerLink.cancel();
}
super.dispose();
}
@override
Widget build(BuildContext context) {
return (new MaterialApp(
title: 'Game Name',
home: Center(
child: CircularProgressIndicator(),
),
navigatorObservers: <NavigatorObserver>[observer],
routes: <String, WidgetBuilder>{
'/NSef': (BuildContext context) => new SocialAppsPage(
"page-1-title",
"Page-1"),
'/82AY': (BuildContext context) => new SocialAppsPage(
"page-2-title",
"Page-2"),
'/DW7Y': (BuildContext context) => new SocialAppsPage(
"page-3-title",
"page-3"),
'/core': (BuildContext context) => new GameHomePage()
},
));
}
}
Any help or suggestions is appreciated.
Thanks!
答案 2 :(得分：0)
StorageReference mStorageRef = FirebaseStorage.getInstance().getReference();
final StorageReference fileupload=mStorageRef.child("Photos").child(fileUri.getLastPathSegment());
UploadTask uploadTask = fileupload.putFile(fileUri);
Task<Uri> urlTask = uploadTask.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 ref.getDownloadUrl();
}
}).addOnCompleteListener(new OnCompleteListener<Uri>() {
@Override
public void onComplete(@NonNull Task<Uri> task) {
if (task.isSuccessful()) {
Uri downloadUri = task.getResult();
Picasso.get().load(downloadUri.toString()).into(image);
} else {
// Handle failures
}
}
});
答案 3 :(得分：0)
我在这里同时上传并获取图片网址...
final StorageReference profileImageRef = FirebaseStorage.getInstance().getReference("profilepics/" + System.currentTimeMillis() + ".jpg");
if (uriProfileImage != null) {
profileImageRef.putFile(uriProfileImage)
.addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
@Override
public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
// profileImageUrl taskSnapshot.getDownloadUrl().toString(); //this is depreciated
//this is the new way to do it
profileImageRef.getDownloadUrl().addOnCompleteListener(new OnCompleteListener<Uri>() {
@Override
public void onComplete(@NonNull Task<Uri> task) {
String profileImageUrl=task.getResult().toString();
Log.i("URL",profileImageUrl);
}
});
}
})
.addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
progressBar.setVisibility(View.GONE);
Toast.makeText(ProfileActivity.this, "aaa "+e.getMessage(), Toast.LENGTH_SHORT).show();
}
});
}
答案 4 :(得分：0)
Clean And Simple
private void putImageInStorage(StorageReference storageReference, Uri uri, final String key) {
storageReference.putFile(uri).addOnCompleteListener(MainActivity.this,
new OnCompleteListener<UploadTask.TaskSnapshot>() {
@Override
public void onComplete(@NonNull Task<UploadTask.TaskSnapshot> task) {
if (task.isSuccessful()) {
task.getResult().getMetadata().getReference().getDownloadUrl()
.addOnCompleteListener(MainActivity.this,
new OnCompleteListener<Uri>() {
@Override
public void onComplete(@NonNull Task<Uri> task) {
if (task.isSuccessful()) {
FriendlyMessage friendlyMessage =
new FriendlyMessage(null, mUsername, mPhotoUrl,
task.getResult().toString());
mFirebaseDatabaseReference.child(MESSAGES_CHILD).child(key)
.setValue(friendlyMessage);
}
}
});
} else {
Log.w(TAG, "Image upload task was not successful.",
task.getException());
}
}
});
}
答案 5 :(得分：0)
在大于11.0.5的Firebase版本中删除了getDownloadUrl方法 我建议使用仍使用此方法的版本11.0.2。
答案 6 :(得分：0)
对我来说，我在Kotlin中编写了代码，并且遇到了相同的错误“ getDownload（）”。这是对我有用的依赖项以及Kotlin代码。
implementation 'com.google.firebase:firebase-storage:18.1.0' Firebase存储依赖项
这是我添加的内容，并且在Kotlin中对我有用。 Storage（）会先于Download（）
profileImageUri = taskSnapshot.storage.downloadUrl.toString()
答案 7 :(得分：0)
现在，新的Firebase更新中不建议使用getDownloadUrl方法。而是使用以下方法。 taskSnapshot.getMetadata（）。getReference（）。getDownloadUrl（）。toString（）
答案 8 :(得分：0)
将收到的 URI 更改为 URL
val urlTask = uploadTask.continueWith { task ->
if (!task.isSuccessful) {
task.exception?.let {
throw it
}
}
spcaeRef.downloadUrl
}.addOnCompleteListener { task ->
if (task.isSuccessful) {
val downloadUri = task.result
//URL
val url = downloadUri!!.result
} else {
//handle failure here
}
}
答案 9 :(得分：0)
您可以将图像上传到Firestore并获取其下载URL，如下所示：
Future<String> uploadPic(File _image) async {
String fileName = basename(_image.path);
StorageReference firebaseStorageRef = FirebaseStorage.instance.ref().child(fileName);
StorageUploadTask uploadTask = firebaseStorageRef.putFile(_image);
var downloadURL = await(await uploadTask.onComplete).ref.getDownloadURL();
var url =downloadURL.toString();
return url;
}
答案 10 :(得分：0)
看这个 https://www.youtube.com/watch?v=SsF8i4WiZpU
它对我有用！！！
答案 11 :(得分：0)
您也可以在最新的 Firebase_storage 版本 nullsafe 中执行以下操作，
//Import
import 'package:firebase_storage/firebase_storage.dart' as firebase_storage;
Future<void> _downloadLink(firebase_storage.Reference ref) async {
//Getting link make sure call await to make sure this function returned a value
final link = await ref.getDownloadURL();
await Clipboard.setData(ClipboardData(
text: link,
));
ScaffoldMessenger.of(context).showSnackBar(
const SnackBar(
content: Text(
'Success!\n Copied download URL to Clipboard!',
),
),
);
}
答案 12 :(得分：-1)
private void getDownloadUrl(){
FirebaseStorage storage = FirebaseStorage.getInstance();
StorageReference storageRef = storage.getReference();
StorageReference imageRef = storageRef.child("image.jpg");
imageRef.getDownloadUrl().addOnCompleteListener(new OnCompleteListener<Uri>() {
@Override
public void onComplete(@NonNull Task<Uri> task) {
String profileimageurl =task.getResult().toString();
Log.e("URL",profileimageurl);
ShowPathTextView.setText(profileimageurl);
}
});
}