我想从 firebase 存储中检索视频

Question

I am working on simple firebase app in which I upload user info as registration data and uploading videos in storage. Path of videos is also stored in realtime database as nested child of every particular user which is working properly, but I don't know how to retrieve video and set in user profile with other user information. I need code to retrieve video from storage.

     case PICK_VIDEO_REQUEST:
            if (resultCode == RESULT_OK) {


                selectedVideoUri = data.getData();
               userUid = FirebaseAuth.getInstance().getCurrentUser().getEmail();
                StorageReference storageRef = FirebaseStorage.getInstance().getReference();
                filename = data.getData().getLastPathSegment();
                tv_file_path.setText(filename);
                videoRef = storageRef.child("/videos/" + userUid + "/" + filename);
                //TODO: save the video in the db


            }
            break;




`//Button upload data in firebase
    btn_upload_notes.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            uploadData(selectedVideoUri);


                           try {
                               if (FirebaseAuth.getInstance().getCurrentUser().getEmail().equals(value.getT_email())) {

                                   file_name = filename;
                                   notes_Category = text;
                                   lecture_topic = et_topic.getText().toString().trim();
                                   id = mDatabase.push().getKey();
                                   NotesModelClass notesModelClass = new NotesModelClass(id, notes_Category, lecture_topic, file_name);
                                   mDatabase.child(value.getT_id()).child("Video Notes").child(id).setValue(notesModelClass);
                                   return;
                               }
                           }
                           catch (Exception ex){
                               throw  ex;
                           }

        }
    });

`

     private void uploadData(Uri videoUri) {
    if (videoUri != null) {
        final ProgressDialog progressDialog = new ProgressDialog(this);
        progressDialog.setTitle("Uploading...");
        progressDialog.show();
        UploadTask uploadTask = videoRef.putFile(videoUri);

        uploadTask.addOnCompleteListener(new OnCompleteListener<UploadTask.TaskSnapshot>() {
            @Override
            public void onComplete(@NonNull Task<UploadTask.TaskSnapshot> task) {
                if (task.isSuccessful())
                    progressDialog.dismiss();
                Toast.makeText(MainActivity.this, "Upload Complete", Toast.LENGTH_SHORT).show();

            }
        }).addOnProgressListener(new OnProgressListener<UploadTask.TaskSnapshot>() {
            @Override
            public void onProgress(UploadTask.TaskSnapshot taskSnapshot) {
                double progress = (100.0 * taskSnapshot.getBytesTransferred() / taskSnapshot
                        .getTotalByteCount());
                progressDialog.setMessage("Uploaded " + (int) progress + "%");
            }
        });
    } else {
        Toast.makeText(MainActivity.this, "Nothing to upload", Toast.LENGTH_SHORT).show();
    }

}

Answer 1

Try this code

Retrive single video.

StorageReference videoRef = storageRef.child("/videos/" + userUid + "/" + filename);

final long ONE_MEGABYTE = 1024 * 1024;
videoRef.getBytes(ONE_MEGABYTE).addOnSuccessListener(new OnSuccessListener<byte[]>() {
    @Override
    public void onSuccess(byte[] bytes) {
        // Transform bytes to a video, play
    }
}).addOnFailureListener(new OnFailureListener() {
    @Override
    public void onFailure(@NonNull Exception exception) {
        // Handle any errors
    }
});

Retrieve multiple video

 StorageTask<UploadTask.TakeSnapshot> storageTask;
        storageTask = yourStorageRefernce.putFile(videoUri);
        storageTask.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();
                }
                return yourStorageRefernce.getDownloadUrl();
            }
        }).addOnCompleteListener(new OnCompleteListener<Uri>() {
            @Override
            public void onComplete(@NonNull Task<Uri> task) {
                if (task.isSuccessful()) {
                    Uri downloadUri = task.getResult();
                    arrayList.add(downloadUri.toString());
                }
            }
        });

Answer 2

Help me random video in firebase

private void loadVideosFromFirebase() {

    videoArrayList=new ArrayList<>();

    DatabaseReference reb = FirebaseDatabase.getInstance().getReference().child("Videos");
    reb.addValueEventListener(new ValueEventListener() {
        @Override
        public void onDataChange(@NonNull DataSnapshot dataSnapshot) {

            for (DataSnapshot ds:dataSnapshot.getChildren()) {
                ModelVideo modelVideo = ds.getValue(ModelVideo.class);
                videoArrayList.add(modelVideo);

            }
            adapterVideo = new AdapterVideo(VideosActivity.this,videoArrayList);
            videosRv.setAdapter(adapterVideo);


        }

        @Override
        public void onCancelled(@NonNull DatabaseError error) {

        }
    });
}