Java 如何从Firebase存储获取URL getDownloadURL
我正在尝试获取Firebase存储桶中文件的“长期持久下载链接”。 我已将此的权限更改为Java 如何从Firebase存储获取URL getDownloadURL,java,android,firebase,firebase-storage,Java,Android,Firebase,Firebase Storage,我正在尝试获取Firebase存储桶中文件的“长期持久下载链接”。 我已将此的权限更改为 service firebase.storage { match /b/project-xxx.appspot.com/o { match /{allPaths=**} { allow read, write; } } } 我的Java代码如下所示: private String niceLink (String date){ String link;
service firebase.storage {
match /b/project-xxx.appspot.com/o {
match /{allPaths=**} {
allow read, write;
}
}
}
我的Java代码如下所示:
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().toString();
return link;
}
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;
}
当我运行这个程序时,我得到的uri链接看起来像
com.google.android.gms.tasks。zzh@xxx
问题1。我可以从中获得类似以下内容的下载链接吗:
尝试获取上面的链接时,我更改了返回前的最后一行,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().toString();
return link;
}
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;
}
但是当我这样做的时候,我得到一个403错误,应用程序崩溃了。控制台告诉我这是bc用户未登录/auth。
“请在请求令牌之前登录”
问题2。如何解决此问题?请参阅
调用getDownloadUrl()
时,调用是异步的,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
}
});
}
StorageReference mStorageRef=firebasestory.getInstance().getReference();
final-StorageReference fileupload=mStorageRef.child(“照片”).child(fileUri.getLastPathSegment());
UploadTask UploadTask=fileupload.putFile(fileUri);
Task urlTask=uploadTask.continueWithTask(新的Continuation(){
@凌驾
公共任务(@NonNull Task Task)引发异常{
如果(!task.issusccessful()){
抛出task.getException();
}
return ref.getDownloadUrl();
}
}).addOnCompleteListener(新的OnCompleteListener(){
@凌驾
未完成的公共void(@NonNull任务){
if(task.issusccessful()){
Uri downloadUri=task.getResult();
Picasso.get().load(downloadUri.toString()).into(图像);
}否则{
//处理故障
}
}
});
//Firebase存储—易于上传和下载
@覆盖
受保护的void onActivityResult(int-requestCode、int-resultCode、@Nullable-final-Intent数据){
super.onActivityResult(请求代码、结果代码、数据);
if(requestCode==RC\u登录){
if(resultCode==RESULT\u OK){
Toast.makeText(这是“已登录!”,长度较短).show();
}else if(resultCode==RESULT\u取消){
Toast.makeText(这是“已取消登录!”,长度较短).show();
完成();
}
}else if(requestCode==RC\u PHOTO\u PICKER&&resultCode==RESULT\u OK){
//这里我称之为方法
上传PhotoInfirebase(数据);
}
}
私有void上传PhotoInfirebase(@Nullable Intent data){
Uri selectedImageUri=data.getData();
//在聊天室获取存储文件的引用/
最终存储引用photoRef=mChatPhotoStorageReference
.child(选择图像URI)
.getLastPathSegment());
//将文件上载到Firebase存储
photoRef.putFile(selectedImageUri)
.addOnSuccessListener(新的OnSuccessListener(){
@凌驾
成功时公共无效(UploadTask.TaskSnapshot TaskSnapshot){
//从Firebase存储下载文件
photoRef.getDownloadUrl().addOnSuccessListener(新OnSuccessListener()){
@凌驾
成功时公共无效(Uri下载照片URL){
//现在使用下载的PhotoURL
//将数据存储到Firebase实时数据库中
FriendlyMessage FriendlyMessage=新的FriendlyMessage
(null,mUsername,downloadPhotoUrl.toString());
mDatabaseReference.push().setValue(friendlyMessage);
}
});
}
});
}
我在这里同时上传和获取图像url…
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();
}
});
}
final-StorageReference profileImageRef=FirebaseStorage.getInstance();
if(uriProfileImage!=null){
profileImageRef.putFile(uriProfileImage)
.addOnSuccessListener(新的OnSuccessListener(){
@凌驾
成功时公共无效(UploadTask.TaskSnapshot TaskSnapshot){
//profileImageUrl taskSnapshot.getDownloadUrl().toString();//已折旧
//这是一种新的方法
profileImageRef.getDownloadUrl().addOnCompleteListener(新的OnCompleteListener(){
@凌驾
未完成的公共void(@NonNull任务){
String profileImageUrl=task.getResult().toString();
Log.i(“URL”,profileImageUrl);
}
});
}
})
.addOnFailureListener(新的OnFailureListener(){
@凌驾
public void onFailure(@NonNull异常e){
progressBar.setVisibility(View.GONE);
Toast.makeText(ProfileActivity.this,“aaa”+e.getMessage(),Toast.LENGTH\u SHORT.show();
}
});
}
干净简单
私有void putImageInStorage(StorageReference、StorageReference、Uri、最终字符串键){
storageReference.putFile(uri).addOnCompleteListener(MainActivity.this,
新的OnCompleteListener(){
@凌驾
未完成的公共void(@NonNull任务){
if(task.issusccessful()){
task.getResult().getMetadata().getReference().getDownloadUrl()
.addOnComplete
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();
}
});
}
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());
}
}
});
}
profileImageUri = taskSnapshot.storage.downloadUrl.toString()
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
}
}
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;
}
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);
}
});
}
//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!',
),
),
);
}