blocks|key|4313381|text|您可以使用StorageReference.getDownloadUrl()。请注意，它返回一个Task，所以您必须记住像对待任何其他Task一样对待它。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|4313382|entityMap|0|LINK|mutability|MUTABLE|url|https://firebase.google.com/docs/reference/android/com/google/firebase/storage/StorageReference.html#getDownloadUrl())^0|5|X|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

You can use <a href="https://firebase.google.com/docs/reference/android/com/google/firebase/storage/StorageReference.html#getDownloadUrl()" rel="nofollow noreferrer">StorageReference.getDownloadUrl()</a>. Please note that it returns a Task, so you will have to remember to treat it asynchronously like you do any other Task.

blocks|key|4313326|text|正如Doug所说，您需要在Task中运行它|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4313327|以下是您需要如何实现它的提示|4313328|final+StorageReference+ref+=+storageRef.child("your_REF");
uploadTask+=+ref.putFile(file);

++++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();
++++++++++++}

++++++++++++//+Continue+with+the+task+to+get+the+download+URL
++++++++++++return+ref.getDownloadUrl();
++++++++}
++++}).addOnCompleteListener(new+OnCompleteListener<Uri>()+{
++++++++@Override
++++++++public+void+onComplete(@NonNull+Task<Uri>+task)+{
++++++++++++if+(task.isSuccessful())+{
++++++++++++++++Uri+downloadUri+=+task.getResult();
++++++++++++++++String+downloadURL+=+downloadUri.toString();
++++++++++++}+else+{
++++++++++++++++//+Handle+failures
++++++++++++++++//+...
++++++++++++}
++++++++}
++++});|code-block|syntax|javascript|4313329|有关如何实现它的更多信息，您可以查看在我回答此https://github.com/udacity/and-nd-firebase/issues/41+7天后打开的github问题|offset|length|4313330|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/udacity/and-nd-firebase/issues/41^0|0|0|0|N|1G|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|V|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|W|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|X|8|@]|9|@$K|Y|L|Z|1|10]]|A|$]]|$1|M|3|-4|5|6|7|11|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|T]]]]

As Doug says, you will need to run it inside a Task 

Here is a hint of how you need to implement it

<pre><code>final StorageReference ref = storageRef.child("your_REF");
uploadTask = ref.putFile(file);

 Task&lt;Uri&gt; urlTask = uploadTask.continueWithTask(new Continuation&lt;UploadTask.TaskSnapshot, Task&lt;Uri&gt;&gt;() {
 @Override
 public Task&lt;Uri&gt; then(@NonNull Task&lt;UploadTask.TaskSnapshot&gt; task) throws Exception {
 if (!task.isSuccessful()) {
 throw task.getException();
 }

 // Continue with the task to get the download URL
 return ref.getDownloadUrl();
 }
 }).addOnCompleteListener(new OnCompleteListener&lt;Uri&gt;() {
 @Override
 public void onComplete(@NonNull Task&lt;Uri&gt; task) {
 if (task.isSuccessful()) {
 Uri downloadUri = task.getResult();
 String downloadURL = downloadUri.toString();
 } else {
 // Handle failures
 // ...
 }
 }
 });
</code></pre>

For more information about how to implement it, you can check this github question that was opened 7 days after I answered this <a href="https://github.com/udacity/and-nd-firebase/issues/41" rel="noreferrer">https://github.com/udacity/and-nd-firebase/issues/41</a>

blocks|key|4313462|text|添加以下代码：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4313463|Task<Uri>+downUrl=taskSnapshot.getMetadata().getReference().getDownloadUrl();
Log.i("url:",downUrl.getResult().toString());|code-block|syntax|javascript|4313464|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Add the code below:

<pre><code>Task&lt;Uri&gt; downUrl=taskSnapshot.getMetadata().getReference().getDownloadUrl();
Log.i("url:",downUrl.getResult().toString());
</code></pre>

blocks|key|4313375|text|//Create+an+instance+of+StorageReference+first+(here+in+this+code+snippet,+it+is+storageRef)++

StorageReference+filepath+=+storageRef.child("images.jpg");

+//If+file+exist+in+storage+this+works.
+filepath.getDownloadUrl().addOnCompleteListener(new+OnCompleteListener<Uri>()+{
++++++++++++++++++++++++++++@Override
++++++++++++++++++++++++++++public+void+onComplete(@NonNull+Task<Uri>+task)+{
++++++++++++++++++++++++++++++++String+downloadUrl+=+task.getResult().toString();
++++++++++++++++++++++++++++++++//+downloadurl+will+be+the+resulted+answer
+++++++++++++++++++++++++++++}
+});|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|4313376|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>//Create an instance of StorageReference first (here in this code snippet, it is storageRef) 

StorageReference filepath = storageRef.child("images.jpg");

 //If file exist in storage this works.
 filepath.getDownloadUrl().addOnCompleteListener(new OnCompleteListener&lt;Uri&gt;() {
 @Override
 public void onComplete(@NonNull Task&lt;Uri&gt; task) {
 String downloadUrl = task.getResult().toString();
 // downloadurl will be the resulted answer
 }
 });
</code></pre>

blocks|key|4313523|text|这段代码很适合我。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4313524|你可以试试。|4313525|package+br.com.amptec.firebaseapp;

import+android.graphics.Bitmap;
import+android.net.Uri;
import+android.provider.ContactsContract;
import+android.support.annotation.NonNull;
import+android.support.v7.app.AppCompatActivity;
import+android.os.Bundle;
import+android.util.Log;
import+android.view.View;
import+android.widget.Button;
import+android.widget.ImageView;
import+android.widget.Toast;

import+com.google.android.gms.tasks.OnCompleteListener;
import+com.google.android.gms.tasks.OnFailureListener;
import+com.google.android.gms.tasks.OnSuccessListener;
import+com.google.android.gms.tasks.Task;
import+com.google.firebase.auth.AuthResult;
import+com.google.firebase.auth.FirebaseAuth;
import+com.google.firebase.database.DataSnapshot;
import+com.google.firebase.database.DatabaseError;
import+com.google.firebase.database.DatabaseReference;
import+com.google.firebase.database.FirebaseDatabase;
import+com.google.firebase.database.Query;
import+com.google.firebase.database.ValueEventListener;
import+com.google.firebase.storage.FirebaseStorage;
import+com.google.firebase.storage.StorageReference;
import+com.google.firebase.storage.UploadTask;

import+java.io.ByteArrayOutputStream;
import+java.util.UUID;

public+class+MainActivity+extends+AppCompatActivity+{

++++private+DatabaseReference+reference+=+FirebaseDatabase.getInstance().getReference();
++++private+FirebaseAuth+auth+=+FirebaseAuth.getInstance();

++++private+Button+btnUpload;
++++private+ImageView+imgPhoto;


++++@Override
++++protected+void+onCreate(Bundle+savedInstanceState)+{
++++++++super.onCreate(savedInstanceState);
++++++++setContentView(R.layout.activity_main);

++++++++btnUpload+=+findViewById(R.id.btnUpload);
++++++++imgPhoto+=+findViewById(R.id.imgPhoto);

++++++++btnUpload.setOnClickListener(new+View.OnClickListener()+{
++++++++++++@Override
++++++++++++public+void+onClick(View+v)+{

++++++++++++++++imgPhoto.setDrawingCacheEnabled(true);
++++++++++++++++imgPhoto.buildDrawingCache();
++++++++++++++++Bitmap+bitmap+=+imgPhoto.getDrawingCache();
++++++++++++++++ByteArrayOutputStream+baos+=+new+ByteArrayOutputStream();
++++++++++++++++bitmap.compress(Bitmap.CompressFormat.JPEG,+100,+baos);
++++++++++++++++byte[]+imageBytes+=+baos.toByteArray();
++++++++++++++++String+fileName+=+UUID.randomUUID().toString();

++++++++++++++++StorageReference+storageReference+=+FirebaseStorage.getInstance().getReference();
++++++++++++++++StorageReference+images+=+storageReference.child("images");
++++++++++++++++StorageReference+imageRef+=+images.child(fileName+%2B+".jpeg");

++++++++++++++++UploadTask+uploadTask+=+imageRef.putBytes(imageBytes);

++++++++++++++++uploadTask.addOnFailureListener(MainActivity.this,+new+OnFailureListener()+{
++++++++++++++++++++@Override
++++++++++++++++++++public+void+onFailure(@NonNull+Exception+e)+{
++++++++++++++++++++++++Toast.makeText(MainActivity.this,+"Upload+Error:+"+%2B
++++++++++++++++++++++++++++++++e.getMessage(),+Toast.LENGTH_LONG).show();
++++++++++++++++++++}
++++++++++++++++}).addOnSuccessListener(MainActivity.this,+new+OnSuccessListener<UploadTask.TaskSnapshot>()+{
++++++++++++++++++++@Override
++++++++++++++++++++public+void+onSuccess(UploadTask.TaskSnapshot+taskSnapshot)+{
++++++++++++++++++++++++//Uri+url+=+taskSnapshot.getDownloadUrl();
++++++++++++++++++++++++Task<Uri>+uri+=+taskSnapshot.getStorage().getDownloadUrl();
++++++++++++++++++++++++while(!uri.isComplete());
++++++++++++++++++++++++Uri+url+=+uri.getResult();

++++++++++++++++++++++++Toast.makeText(MainActivity.this,+"Upload+Success,+download+URL+"+%2B
++++++++++++++++++++++++++++++++url.toString(),+Toast.LENGTH_LONG).show();
++++++++++++++++++++++++Log.i("FBApp1+URL+",+url.toString());
++++++++++++++++++++}
++++++++++++++++});
++++++++++++}
++++++++});
++++}
}|code-block|syntax|javascript|4313526|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

This code work for me.

You can try.

<pre><code>package br.com.amptec.firebaseapp;

import android.graphics.Bitmap;
import android.net.Uri;
import android.provider.ContactsContract;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;

import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.OnFailureListener;
import com.google.android.gms.tasks.OnSuccessListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.auth.AuthResult;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.Query;
import com.google.firebase.database.ValueEventListener;
import com.google.firebase.storage.FirebaseStorage;
import com.google.firebase.storage.StorageReference;
import com.google.firebase.storage.UploadTask;

import java.io.ByteArrayOutputStream;
import java.util.UUID;

public class MainActivity extends AppCompatActivity {

 private DatabaseReference reference = FirebaseDatabase.getInstance().getReference();
 private FirebaseAuth auth = FirebaseAuth.getInstance();

 private Button btnUpload;
 private ImageView imgPhoto;


 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);

 btnUpload = findViewById(R.id.btnUpload);
 imgPhoto = findViewById(R.id.imgPhoto);

 btnUpload.setOnClickListener(new View.OnClickListener() {
 @Override
 public void onClick(View v) {

 imgPhoto.setDrawingCacheEnabled(true);
 imgPhoto.buildDrawingCache();
 Bitmap bitmap = imgPhoto.getDrawingCache();
 ByteArrayOutputStream baos = new ByteArrayOutputStream();
 bitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos);
 byte[] imageBytes = baos.toByteArray();
 String fileName = UUID.randomUUID().toString();

 StorageReference storageReference = FirebaseStorage.getInstance().getReference();
 StorageReference images = storageReference.child("images");
 StorageReference imageRef = images.child(fileName + ".jpeg");

 UploadTask uploadTask = imageRef.putBytes(imageBytes);

 uploadTask.addOnFailureListener(MainActivity.this, new OnFailureListener() {
 @Override
 public void onFailure(@NonNull Exception e) {
 Toast.makeText(MainActivity.this, "Upload Error: " +
 e.getMessage(), Toast.LENGTH_LONG).show();
 }
 }).addOnSuccessListener(MainActivity.this, new OnSuccessListener&lt;UploadTask.TaskSnapshot&gt;() {
 @Override
 public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
 //Uri url = taskSnapshot.getDownloadUrl();
 Task&lt;Uri&gt; uri = taskSnapshot.getStorage().getDownloadUrl();
 while(!uri.isComplete());
 Uri url = uri.getResult();

 Toast.makeText(MainActivity.this, "Upload Success, download URL " +
 url.toString(), Toast.LENGTH_LONG).show();
 Log.i("FBApp1 URL ", url.toString());
 }
 });
 }
 });
 }
}
</code></pre>

blocks|key|4313591|text|将此实现用于您的uploadTask，将会起作用。:)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4313592|uploadTask.addOnSuccessListener(new+OnSuccessListener<UploadTask.TaskSnapshot>()+{
++++++++++++@Override
++++++++++++public+void+onSuccess(UploadTask.TaskSnapshot+taskSnapshot)+{
++++++++++++++++Task<Uri>+firebaseUri+=+taskSnapshot.getStorage().getDownloadUrl();
++++++++++++++++firebaseUri.addOnSuccessListener(new+OnSuccessListener<Uri>()+{
++++++++++++++++++++@Override
++++++++++++++++++++public+void+onSuccess(Uri+uri)+{

++++++++++++++++++++++++String+url+=+uri.toString();
++++++++++++++++++++++++Log.e("TAG:",+"the+url+is:+"+%2B+url);

++++++++++++++++++++++++String+ref+=+yourStorageReference.getName();
++++++++++++++++++++++++Log.e("TAG:",+"the+ref+is:+"+%2B+ref);
++++++++++++++++++++}
++++++++++++++++});
++++++++++++}
++++++++});|code-block|syntax|javascript|4313593|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Use this implementation for your uploadTask and will work. :)

<pre><code>uploadTask.addOnSuccessListener(new OnSuccessListener&lt;UploadTask.TaskSnapshot&gt;() {
 @Override
 public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
 Task&lt;Uri&gt; firebaseUri = taskSnapshot.getStorage().getDownloadUrl();
 firebaseUri.addOnSuccessListener(new OnSuccessListener&lt;Uri&gt;() {
 @Override
 public void onSuccess(Uri uri) {

 String url = uri.toString();
 Log.e("TAG:", "the url is: " + url);

 String ref = yourStorageReference.getName();
 Log.e("TAG:", "the ref is: " + ref);
 }
 });
 }
 });
</code></pre>

blocks|key|4313502|text|Task<Uri>+task+=+taskSnapshot.getMetadata().getReference().getDownloadUrl();
task.addOnSuccessListener(new+OnSuccessListener<Uri>()+{
+++++++@Override
++++++++public+void+onSuccess(Uri+uri)+{
++++++++++++++String+photoLink+=+uri.toString();
++++++++}
});|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|4313503|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>Task&lt;Uri&gt; task = taskSnapshot.getMetadata().getReference().getDownloadUrl();
task.addOnSuccessListener(new OnSuccessListener&lt;Uri&gt;() {
 @Override
 public void onSuccess(Uri uri) {
 String photoLink = uri.toString();
 }
});
</code></pre>

blocks|key|4313697|text|使用taskSnapshot.getTask()而不是taskSnapshot.getDownloadUrl()对我来说很好。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4313698|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Use taskSnapshot.getTask() instead of taskSnapshot.getDownloadUrl() works fine for me.

Until now, the way to get the url from file on Storage in Firebase, I used to do this 
<code>taskSnapshot.getDownloadUrl</code>, but nowadays is deprecated, which method I should use?

<a href="https://i.stack.imgur.com/E35Uy.png" rel="noreferrer"><img src="https://i.stack.imgur.com/E35Uy.png" alt="enter image description here"></a>

taskSnapshot.getDownloadUrl() is deprecated

直到现在，在Firebase的存储上从文件中获取url的方法，我过去是这样做的taskSnapshot.getDownloadUrl，但现在被弃用，我应该使用哪种方法？​​

问taskSnapshot.getDownloadUrl()已弃用
EN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问taskSnapshot.getDownloadUrl()已弃用EN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问taskSnapshot.getDownloadUrl()已弃用
EN