我想從 firebase 存儲中檢索視頻

Question

我正在開發簡單的 firebase 應用程序，在該應用程序中我將用戶信息上傳為注冊數據並上傳存儲中的視頻。 視頻路徑也作為每個特定用戶的嵌套子項存儲在實時數據庫中，這些用戶正常工作，但我不知道如何檢索視頻並在用戶配置文件中設置其他用戶信息。 我需要代碼來從存儲中檢索視頻。

     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

試試這個代碼

檢索單個視頻。

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
    }
});

檢索多個視頻

 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

幫我在 firebase 中隨機播放視頻

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) {

        }
    });
}