[英]How to retrieve the download URL of an image from Firebase Storage?
[英]Unable to retrieve image's download URL from Firebase Storage (getting exception) [NEED URGENT HELP]
该代码成功地将图像上传到 Firebase 存储,但没有返回下载 URL。 我怎样才能解决这个问题?
我得到这个异常: java.lang.IllegalArgumentException: getDownloadUrl() is not supported at the root of the bucket.
为什么?
private void uploadFile() {
if (mImageUri != null) {
StorageReference fileReference = mStorageRef.child(System.currentTimeMillis()
+ "." + getFileExtension(mImageUri));
fileReference.putFile(mImageUri).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();
}
// Continue with the task to get the download URL
return mStorageRef.getDownloadUrl();
}
}).addOnCompleteListener(new OnCompleteListener<Uri>() {
@Override
public void onComplete(@NonNull Task<Uri> task) {
if (task.isSuccessful()) {
Uri downloadUri = task.getResult();
System.out.println("Upload success: " + downloadUri);
} else {
// Handle failures
// ...
}
}
});
} else {
Toast.makeText(this, "No file selected", Toast.LENGTH_SHORT).show();
}
}
我认为返回下载网址有问题,请尝试以下代码:
private void uploadFile() {
if (mImageUri != null) {
StorageReference fileReference = mStorageRef.child(System.currentTimeMillis()
+ "." + getFileExtension(mImageUri));
fileReference.putFile(mImageUri).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();
}
// Continue with the task to get the download URL
//change made here
return fileReference.getDownloadUrl();
}
}).addOnCompleteListener(new OnCompleteListener<Uri>() {
@Override
public void onComplete(@NonNull Task<Uri> task) {
if (task.isSuccessful()) {
Uri downloadUri = task.getResult();
System.out.println("Upload success: " + downloadUri);
} else {
// Handle failures
// ...
}
}
});
} else {
Toast.makeText(this, "No file selected", Toast.LENGTH_SHORT).show();
}
}
所以我有同样的问题。 我有一个已经使用了两年的代码,但在 Firebase 中似乎发生了一些变化。 Bellow 是一个可以工作并解决这个问题的新代码。 Ps:它在 kotlin 中,但您可以在参考链接中找到 android 示例,然后根据我的代码进行调整。
首先声明一个全局变量 private lateinit var filePath: Uri
然后将您的图像放入此 uri 文件中。
然后转到您要上传的代码:
mFireBaseStorage = FirebaseStorage.getInstance()
mphotoStorageReference = mFireBaseStorage.reference //storage references
val storageRef = mphotoStorageReference.child("usuarios_img") //path in storage. This is the folder name in storage
val bmp: Bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), filePath)
val baos: ByteArrayOutputStream = ByteArrayOutputStream()
bmp.compress(Bitmap.CompressFormat.JPEG, 25, baos) //choose compreess rate (100 means no compression)
//get the uri from the bitmap
val tempUri: Uri = getImageUri(this, bmp)
//transform the new compressed bmp in filepath uri
filePath = tempUri //filePath is a global variable Uri
var uploadTask = storageRef.child("the_name_of_the_file).putFile(filePath)
// [START upload_get_download_url]
val ref = storageRef
uploadTask = ref.putFile(filePath)
val urlTask = uploadTask.continueWithTask { task ->
if (!task.isSuccessful) {
task.exception?.let {
throw it
}
}
ref.downloadUrl
}.addOnCompleteListener { task ->
if (task.isSuccessful) {
val downloadUri = task.result
Log.d("test", "worked, this is the url link "+downloadUri)
} else {
// Handle failures
Log.d("test", "error")
}
}
就这样。
参考https://firebase.google.com/docs/storage/android/upload-files?hl=pt-br
希望它有所帮助,因为我已经失去了几个小时。
我已经解决了这个问题。 但我正在使用 Kotlin。 我希望这将有助于其他开发人员。 我对此做了一些解释。
storageReference.child(Constant.EDUCATION).child(id).putFile(dataUpload!!.data!!)
.addOnProgressListener {
handleOnProgressUpload(it)
}.addOnSuccessListener { task ->
//At here onSuccess, we get the task to get the downloadUrl
task.storage.downloadUrl.addOnSuccessListener {
val downloadUrl = it.toString()
handleSuccessDownloadUrl(downloadUrl)
}
}
<style name="Widget.Material.TextView.ListSeparator" parent="Widget.TextView.ListSeparator">
<item name="background">@drawable/list_section_divider_material</item>
<item name="textAllCaps">true</item>
- </style>
<style name="Widget.Material.Light.TextView.ListSeparator" parent="Widget.Material.TextView.ListSeparator"/>
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