如何在 firebase 存储上多次上传可绘制图像？

Question

I would like to know if is it possible to upload multiple time the same image taken from the drawable images on firebase storage in such a way that on the storage the image appears multiple times under different names. What I do is:

imageUri=Uri.parse("android.resource://com.example.project/"+R.drawable.error);
riversRef = storageRef.child("images/" + imageUri.getLastPathSegment()+ "_" + System.currentTimeMillis());
uploadTask = riversRef.putFile(imageUri);

but everytime I use this in the storage does not appear any new images, just the first. Probably because having the same name on the storage (2131230900) and being the same image the storage ignore it. The result I want to obtain is that I have the two identical images took from the drawable of my project but in the storage they results as 2 different names

Answer 1

Your riversRef is a reference to a specific location/file in Cloud Storage. If you call putFile multiple times on the same reference, you're writing to the same location multiple times, so you'll indeed end up with only one file

To write multiple unique files, you'll need to create a separate unique reference for each file. Something like:

riversRef = storageRef.child("images/" + file.getLastPathSegment() + "_" + System.currentTimeMillis());

By adding the timestamp to the name of the file on Storage here, we end up with unique references if you call this multiple times. Alternatively something like this would also work:

for (int i=0; i < 10; i++) {
    riversRef = storageRef.child("images/" + file.getLastPathSegment() + "_" + i);
    uploadTask = riversRef.putFile(file);
}

So now we're just adding a counter to each file name in Cloud Storage.