Firebase Storage – Get List of Files example – Image List | Android

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loveprogramming viết ngày 23/04/2021

https://grokonez.com/android/firebase-storage-get-list-files-display-image-firebase-ui-database-android

Firebase Storage – Get List of Files example – Image List | Android

We had known the way to upload/download data. In this tutorial, we're gonna look at way to get list of files example - display list of Images with Firebase UI Database FirebaseRecyclerAdapter.

Related Posts:

• Firebase Storage – Upload Data from Memory, Local File, Stream | Android
• Firebase Storage – Download Files to Memory, Local File | Android

I. How to do

To display list of Images, we need to:

• add Firebase to Android App & enable Firebase Auth
• use Firebase Cloud Storage to upload and store images
• use Firebase Realtime Database to store images' information (name + url)
• use FirebaseRecyclerAdapter to display images in RecyclerView with the help of Picasso lib.

To know way to add Firebase to Android App & enable Firebase Auth, please visit previous post:
Firebase Storage – Upload Data from Memory, Local File, Stream | Android

1. Upload and store images

Use Firebase Cloud Storage:

// store image at "images/filename.extension" on Firebase Cloud Storage

imageReference = FirebaseStorage.getInstance().getReference().child("images");
fileRef = imageReference.child(fileName + "." + getFileExtension(fileUri));

fileRef.putFile(fileUri)
        .addOnSuccessListener(new OnSuccessListener() {
            @Override
            public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
                String name = taskSnapshot.getMetadata().getName();
                String url = taskSnapshot.getDownloadUrl().toString();

                // use Firebase Realtime Database to store [name + url]
                writeNewImageInfoToDB(name, url);
            }
        })
        .addOnFailureListener(new OnFailureListener() {
            @Override
            public void onFailure(@NonNull Exception exception) {
                // ...
            }
        })
        .addOnProgressListener(new OnProgressListener() {
            @Override
            public void onProgress(UploadTask.TaskSnapshot taskSnapshot) {
                // progress percentage
                double progress = (100.0 * taskSnapshot.getBytesTransferred()) / taskSnapshot.getTotalByteCount();

                // percentage in progress dialog
                progressDialog.setMessage("Uploaded " + ((int) progress) + "%...");
            }
        })
        .addOnPausedListener(new OnPausedListener() {
            @Override
            public void onPaused(UploadTask.TaskSnapshot taskSnapshot) {
                // ...
            }
        });

2. Store images' information

Use Firebase Realtime Database:

More at:

https://grokonez.com/android/firebase-storage-get-list-files-display-image-firebase-ui-database-android

Firebase Storage – Get List of Files example – Image List | Android