相关疑难解决方法(0)

我试图添加一个进度条来上传firebase上的文件.但不幸的是,它并不表示上传进度.logcat和进度条都只显示文件何时达到100%

   uploadTask.addOnProgressListener(new OnProgressListener<UploadTask.TaskSnapshot>() {
            @Override
            public void onProgress(UploadTask.TaskSnapshot taskSnapshot) {
                double progress = 100.0 * (taskSnapshot.getBytesTransferred() / taskSnapshot.getTotalByteCount());
                System.out.println("Upload is " + progress + "% done");
            int currentprogress = (int) progress;
                progressBar.setProgress(currentprogress);
            }
        }).addOnPausedListener(new OnPausedListener<UploadTask.TaskSnapshot>() {
            @Override
            public void onPaused(UploadTask.TaskSnapshot taskSnapshot) {
                System.out.println("Upload is paused");
            }
        });