taskSnapshot.getDownloadUrl() is deprecated

Question

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

Answer 1

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

Here is a hint of how you need to implement it

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
                // ...
            }
        }
    });

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

Answer 2

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

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: " + url);

                        String ref = yourStorageReference.getName();
                        Log.e("TAG:", "the ref is: " + ref);
                    }
                });
            }
        });

Answer 3

This code work for me.

You can try.

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<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 " +
                                url.toString(), Toast.LENGTH_LONG).show();
                        Log.i("FBApp1 URL ", url.toString());
                    }
                });
            }
        });
    }
}