CODEWITHSUNDEEP
androidfirebasefirebase-realtime-databasefirebase-authenticationandroid-sharedpreferences
user7696842
user7696842

Reputation:

Android- Upload image to Firebase under a specific user

I am fairly new to Android and want to make an app that allows users to upload pictures using Firebase storage. After they log in, I made it so that their Uid gets sent to SharedPreferences, so that I can retrieve it in my imageupload activity later. I need it so that when the image gets sent to Firebase, it gets put under the folder of their userid.

This is my current login activity that retrieves the Uid:

FirebaseAuth auth = FirebaseAuth.getInstance();
        FirebaseAuth.AuthStateListener authListener = new FirebaseAuth.AuthStateListener() {
            @Override
            public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
                FirebaseUser firebaseUser = firebaseAuth.getCurrentUser();
                if (firebaseUser != null) {
                    String userId = firebaseUser.getUid();
                    sharedPref = getPreferences(MODE_PRIVATE);
                    SharedPreferences.Editor editor = sharedPref.edit();
                    editor.putString("firebasekey", userId);
                    editor.commit();

And this is my imageupload activity:

sharedPref = getPreferences(MODE_PRIVATE);
    String UserId = sharedPref.getString("firebasekey", "1");
    StorageReference storageRef= FirebaseStorage.getInstance().getReference();
    StorageReference mountainsRef = storageRef.child("uploads/"+UserId+System.currentTimeMillis());

Help would be greatly appreciated.

Upvotes: 1

Views: 3485

Answers (2)

Cătălin Florescu
Cătălin Florescu

Reputation: 5148

Here you go

String userUid = FirebaseAuth.getInstance().getCurrentUser().getUid();
UploadTask uploadTask = FirebaseStorage.getInstance().child("newFolder").getReference(userUid).putBytes(yourPhotoToByteArray);
uploadTask
            .addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
                @Override
                public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {

                }
            })
            .addOnFailureListener(new OnFailureListener() {
                @Override
                public void onFailure(@NonNull Exception e) {

                }
            });

And to retrieve image

StorageReference storageReference = FirebaseStorage.getInstance().getReference("newFolder/" + userUid);

You can read here more about FirebaseCloudStorage. Here how to upload, and here how to download them.

Upvotes: 5

David Jarvis
David Jarvis

Reputation: 2809

Hi Mozy below code should, when called launch intent to choose an image from gallery and upload it to firebase. Hope this helps.

private void updateImg() {
    Intent intent = new Intent();
    intent.setType("image/*");
    intent.setAction(Intent.ACTION_GET_CONTENT);
    startActivityForResult(Intent.createChooser(intent, "Select picture"), CHOOSE_IMAGE);
}


@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    if (requestCode == CHOOSE_IMAGE && resultCode == Activity.RESULT_OK) {
        if (data == null) {
            // Display an error
            return;
        }


        // create an inputStream from the intent result we have just created
        InputStream inputStream = null;
        try {
            inputStream = yourActivity.this.getContentResolver().openInputStream(data.getData());
            uploadImageToFirebase(inputStream);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
    }
}

private void uploadImageToFirebase(InputStream rInputStream) {
    sharedPref = getPreferences(MODE_PRIVATE);
    String UserId = sharedPref.getString("firebasekey", "1");
    StorageReference storageRef = 
    FirebaseStorage.getInstance().getReference();
    StorageReference mountainsRef = storageRef.child("uploads/"+UserId+System.currentTimeMillis());
    // running the task
    UploadTask uploadTask = mountainsRef.putStream(rInputStream);
    uploadTask.addOnFailureListener(new OnFailureListener() {
        @Override
        public void onFailure(@NonNull Exception e) {
            // show error
        }
    }).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
        @Override
        public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
            // do ui stuff
        }
    });
}

Upvotes: 0

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