为什么我在 getUploadUrl 上一遍又一遍地得到错误的 link ？它不工作

Question

我试图用类似的线程和答案解决这个问题，但完全失败了。我的图像正在存储在 firebase 存储中，数据库上传 link 正在工作，但它总是错误的 link。我得到 "com.google.android.gms.tasks.zzu@8045166" 所以图像没有显示在应用程序上

这是老版本GetDownloadUrl的整体代码


private void InitializeFields()
    {
        UpdateAccountSettings = (Button) findViewById(R.id.update_settings_button);
        userName = (EditText) findViewById(R.id.set_user_name);
        userStatus = (EditText) findViewById(R.id.set_profile_status);
        userProfileImage = (CircleImageView) findViewById(R.id.set_profile_image);
        loadingBar = new ProgressDialog(this);

        SettingsToolBar = (Toolbar) findViewById(R.id.settings_toolbar);
        setSupportActionBar(SettingsToolBar);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        getSupportActionBar().setDisplayShowCustomEnabled(true);
        getSupportActionBar().setTitle("Account Settings");
    }




    @Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data)
    {
        super.onActivityResult(requestCode, resultCode, data);

        if (requestCode==GalleryPick  &&  resultCode==RESULT_OK  &&  data!=null)
        {
            Uri ImageUri = data.getData();

            CropImage.activity()
                    .setGuidelines(CropImageView.Guidelines.ON)
                    .setAspectRatio(1, 1)
                    .start(this);
        }

        if (requestCode == CropImage.CROP_IMAGE_ACTIVITY_REQUEST_CODE)
        {
            CropImage.ActivityResult result = CropImage.getActivityResult(data);

            if (resultCode == RESULT_OK)
            {
                loadingBar.setTitle("Set Profile Image");
                loadingBar.setMessage("Please wait, your profile image is updating...");
                loadingBar.setCanceledOnTouchOutside(false);
                loadingBar.show();

                Uri resultUri = result.getUri();


                StorageReference filePath = UserProfileImagesRef.child(currentUserID + ".jpg");

                filePath.putFile(resultUri).addOnCompleteListener(new OnCompleteListener<UploadTask.TaskSnapshot>() {
                    @Override
                    public void onComplete(@NonNull Task<UploadTask.TaskSnapshot> task)
                    {
                        if (task.isSuccessful())
                        {
                            Toast.makeText(SettingsActivity.this, "Profile Image uploaded Successfully...", Toast.LENGTH_SHORT).show();



                            //--------------------------------------------->>
                            final String downloaedUrl = task.getResult().getDownloadUrl().toString(); **
                            //---------------------------------------------<<


                            RootRef.child("Users").child(currentUserID).child("image")
                                    .setValue(downloaedUrl)
                                    .addOnCompleteListener(new OnCompleteListener<Void>() {
                                        @Override
                                        public void onComplete(@NonNull Task<Void> task)
                                        {
                                            if (task.isSuccessful())
                                            {
                                                Toast.makeText(SettingsActivity.this, "Image save in Database, Successfully...", Toast.LENGTH_SHORT).show();
                                                loadingBar.dismiss();
                                            }
                                            else
                                            {
                                                String message = task.getException().toString();
                                                Toast.makeText(SettingsActivity.this, "Error: " + message, Toast.LENGTH_SHORT).show();
                                                loadingBar.dismiss();
                                            }
                                        }
                                    });
                        }
                        else
                        {
                            String message = task.getException().toString();
                            Toast.makeText(SettingsActivity.this, "Error: " + message, Toast.LENGTH_SHORT).show();
                            loadingBar.dismiss();
                        }
                    }
                });
            }
        }
    }

我试过了

filePath.putFile(resultUri).addOnCompleteListener(new OnCompleteListener<UploadTask.TaskSnapshot>() {
                    @Override
                    public void onComplete(@NonNull Task<UploadTask.TaskSnapshot> task)
                    {
                        if (task.isSuccessful())
                        {
                            //--- what i tried instead of: final String downloaedUrl = task.getResult().getDownloadUrl().toString();

                            final String downloadUrl = filePath.getDownloadUrl().toString();

                            Toast.makeText(SettingsActivity.this, "Profile Image uploaded Successfully...", Toast.LENGTH_SHORT).show();

Answer 1

方法getDownloadUrl()异步执行。所以你不能在后面直接调用 toString() 。您将需要附加回调。此外，UploadTask.TaskSnapshot 中的 getDownloadUrl() 已弃用。所以你可以这样做：

filePath.putFile(resultUri).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 filePath.getDownloadUrl();
    }
}).addOnCompleteListener(new OnCompleteListener<Uri>() {
    @Override
    public void onComplete(@NonNull Task<Uri> task) {
        if (task.isSuccessful()) {
            // retrieve your uri here
            Uri downloadUri = task.getResult();
            Log.d("TEST", "download uri: " + downloadUri.toString());
        } else {
            // load failed. Handle exception from task.getException()
        }
    }
});

为什么我在 getUploadUrl 上一遍又一遍地得到错误的 link ？它不工作

Why am I getting the wrong link over and over again on getUploadUrl ? It is not working

java

android

image-uploading