Question

我正在开发一个简单的Firebase应用程序，在该应用程序中，我将用户信息上传为注册数据，并在存储区中上传视频。视频的路径也作为每个正常工作的特定用户的嵌套子项存储在实时数据库中，但是我不知道如何检索视频以及如何在用户个人资料中设置其他用户信息。我需要代码才能从存储中检索视频。

     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

尝试此代码

检索单个视频。

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
    }
});

检索多个视频

 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

帮我在Firebase中随机播放视频

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) {

        }
    });
}

我想从Firebase存储中检索视频

2 个答案: