How to save bitmap to Firebase

you must first add the dependencies for Firebase Storage to your build.gradle file:

compile 'com.google.firebase:firebase-storage:10.0.1' compile 'com.google.firebase:firebase-auth:10.0.1' 

then create an instance of FirebaseStorage:

FirebaseStorage storage = FirebaseStorage.getInstance(); 

To upload a file to Firebase Storage, you first create a reference to the full path of the file, including the file name.

// Create a storage reference from our app StorageReference storageRef = storage.getReferenceFromUrl("gs://<your-bucket-name>"); // Create a reference to "mountains.jpg" StorageReference mountainsRef = storageRef.child("mountains.jpg"); // Create a reference to 'images/mountains.jpg' StorageReference mountainImagesRef = storageRef.child("images/mountains.jpg"); // While the file names are the same, the references point to different files mountainsRef.getName().equals(mountainImagesRef.getName()); // true mountainsRef.getPath().equals(mountainImagesRef.getPath()); // false 

Once you've created an appropriate reference, you then call the putBytes(), putFile(), or putStream() method to upload the file to Firebase Storage.

The putBytes() method is the simplest way to upload a file to Firebase Storage. putBytes() takes a byte[] and returns an UploadTask that you can use to manage and monitor the status of the upload.

// Get the data from an ImageView as bytes imageView.setDrawingCacheEnabled(true); imageView.buildDrawingCache(); Bitmap bitmap = imageView.getDrawingCache(); ByteArrayOutputStream baos = new ByteArrayOutputStream(); bitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos); byte[] data = baos.toByteArray(); UploadTask uploadTask = mountainsRef.putBytes(data); uploadTask.addOnFailureListener(new OnFailureListener() { @Override public void onFailure(@NonNull Exception exception) { // Handle unsuccessful uploads } }).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() { @Override public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) { // taskSnapshot.getMetadata() contains file metadata such as size, content-type, and download URL. Uri downloadUrl = taskSnapshot.getDownloadUrl(); } }); 

Firebase does not support binary data, so you need to convert the image data to base64 or use Firebase Storage

Method 1 ( Recommended )

 sref = FirebaseStorage.getInstance().getReference(); // please go to above link and setup firebase storage for android public void uploadFile(Uri imagUri) { if (imagUri != null) { final StorageReference imageRef = sref.child("android/media") // folder path in firebase storage .child(imagUri.getLastPathSegment()); photoRef.putFile(imagUri) .addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() { @Override public void onSuccess(UploadTask.TaskSnapshot snapshot) { // Get the download URL Uri downloadUri = snapshot.getMetadata().getDownloadUrl(); // use this download url with imageview for viewing & store this linke to firebase message data } }) .addOnFailureListener(new OnFailureListener() { @Override public void onFailure(@NonNull Exception exception) { // show message on failure may be network/disk ? } }); } } 

Method 2

for small images we can still go with this solution, there is firebase field value limitations(1MB field value) check official doc for details

public void getImageData(Bitmap bmp) { ByteArrayOutputStream bao = new ByteArrayOutputStream(); bmp.compress(Bitmap.CompressFormat.PNG, 100, bao); // bmp is bitmap from user image file bmp.recycle(); byte[] byteArray = bao.toByteArray(); String imageB64 = Base64.encodeToString(byteArray, Base64.URL_SAFE); // store & retrieve this string which is URL safe(can be used to store in FBDB) to firebase // Use either Realtime Database or Firestore } 

"firebase-storage 16.0.1"

task.getDowloadUrl() not defined. You can use this i check , working perfectly.

 private void firebaseUploadBitmap(Bitmap bitmap) { ByteArrayOutputStream stream = new ByteArrayOutputStream(); bitmap.compress(Bitmap.CompressFormat.PNG, 100, stream); byte[] data = stream.toByteArray(); StorageReference imageStorage = storage.getReference(); StorageReference imageRef = imageStorage.child("images/" + "imageName"); Task<Uri> urlTask = imageRef.putBytes(data).continueWithTask(task -> { if (!task.isSuccessful()) { throw task.getException(); } // Continue with the task to get the download URL return imageRef.getDownloadUrl(); }).addOnCompleteListener(task -> { if (task.isSuccessful()) { Uri downloadUri = task.getResult(); String uri = downloadUri.toString(); sendMessageWithFile(uri); } else { // Handle failures // ... } progressBar.setVisibility(View.GONE); }); } @Override protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) { super.onActivityResult(requestCode, resultCode, data); if (requestCode == PICK_IMAGE && resultCode == Activity.RESULT_OK) { // Bitmap imageBitmap = data.getData() ; Bitmap photo = (Bitmap) data.getExtras().get("data"); if (photo != null) firebaseUploadBitmap(photo); } else if (requestCode == SELECT_IMAGE && resultCode == Activity.RESULT_OK) { Uri uri = data.getData(); if (uri != null) firebaseUploadImage(uri); } }