无法关闭 "for loop" 内的 addonsucesslistener() 内的进度对话框

Question

我正在选择多个图像并将它们存储到 Firebase 存储中，然后在 ArrayList 中检索下载 URL 并将其添加到 Firebase 数据库中，我的代码工作正常但我不知道什么时候停止进度对话框，我必须关闭进度对话框，这样当进度条的任务完成时，进度对话框就会消失。

这是我的代码：

private void uploadScreenshot() {

    if (screenshotUri != null) {
        final ProgressDialog mDialog = new ProgressDialog(this);
        mDialog.setMessage("Uploading...");
        mDialog.show();

        String ssName = UUID.randomUUID().toString();
        final StorageReference screenshotFolder = storageReference.child("screenshots/" + ssName);

        for (upload_count = 0; upload_count < ScreenshotList.size(); upload_count++) {
            Uri IndividualImage = Uri.parse(ScreenshotList.get(upload_count));
            final StorageReference ScreenshotName = screenshotFolder.child(IndividualImage.getLastPathSegment());

            ScreenshotName.putFile(IndividualImage).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
                @Override
                public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
                    ScreenshotName.getDownloadUrl().addOnSuccessListener(new OnSuccessListener<Uri>() {
                        @Override
                        public void onSuccess(Uri uri) {
                            String url = String.valueOf(uri);
                            storeLink(url);
                        }
                    });
                }
            }).addOnFailureListener(new OnFailureListener() {
                @Override
                public void onFailure(@NonNull Exception e) {
                    mDialog.dismiss();
                    Toast.makeText(AppList.this, "" + e.getMessage(), Toast.LENGTH_SHORT).show();
                }
            })
                    .addOnProgressListener(new OnProgressListener<UploadTask.TaskSnapshot>() {
                        @Override
                        public void onProgress(UploadTask.TaskSnapshot taskSnapshot) {
                            double progress = (100.0 * taskSnapshot.getBytesTransferred() / taskSnapshot.getTotalByteCount());
                            mDialog.setMessage("Uploaded " + progress + "%");
                        }
                    });
        }

    }
    // mDialog.dismiss();
    //Toast.makeText(AppList.this, "Screenshots Uploaded !!!", Toast.LENGTH_SHORT).show();
}


private void storeLink(String url) {


    ssList.add(url);

    newApp.setScreenshot(ssList);
}

Answer 1

在代码中的 addprogressListner 之后替换 mDialog.dismiss();

private void uploadScreenshot() {

        if (screenshotUri != null) {
            final ProgressDialog mDialog = new ProgressDialog(this);
            mDialog.setMessage("Uploading...");
            mDialog.show();

            String ssName = UUID.randomUUID().toString();
            final StorageReference screenshotFolder = storageReference.child("screenshots/" + ssName);

            for (upload_count = 0; upload_count < ScreenshotList.size(); upload_count++) {
                Uri IndividualImage = Uri.parse(ScreenshotList.get(upload_count));
                final StorageReference ScreenshotName = screenshotFolder.child(IndividualImage.getLastPathSegment());

                ScreenshotName.putFile(IndividualImage).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
                    @Override
                    public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
                        ScreenshotName.getDownloadUrl().addOnSuccessListener(new OnSuccessListener<Uri>() {
                            @Override
                            public void onSuccess(Uri uri) {
                                String url = String.valueOf(uri);
                                storeLink(url);
                            }
                        });
                    }
                }).addOnFailureListener(new OnFailureListener() {
                    @Override
                    public void onFailure(@NonNull Exception e) {
                        mDialog.dismiss();
                        Toast.makeText(AppList.this, "" + e.getMessage(), Toast.LENGTH_SHORT).show();
                    }
                })
                        .addOnProgressListener(new OnProgressListener<UploadTask.TaskSnapshot>() {
                            @Override
                            public void onProgress(UploadTask.TaskSnapshot taskSnapshot) {
                                double progress = (100.0 * taskSnapshot.getBytesTransferred() / taskSnapshot.getTotalByteCount());
                                mDialog.setMessage("Uploaded " + progress + "%");
                            }
                        });
                    mDialog.dismiss();
Toast.makeText(AppList.this, "Screenshots Uploaded !!!", Toast.LENGTH_SHORT).show();


            }

        }
        
        
    }


    private void storeLink(String url) {


        ssList.add(url);

        newApp.setScreenshot(ssList);
    }

Answer 2

当您调用 uploadScreenshot() 时，您要做的第一件事就是显示 ProgressDialog。当您将文件上传到 Firebase 存储时，您得到的响应可能是成功也可能是失败，绝不会两者兼而有之。这意味着您应该关闭 onSuccess() 和 onFailure() 方法中的对话框。如果您已成功上传文件，则应关闭该对话框，如果失败也应该关闭该对话框。所以请添加以下代码行：

mDialog.dismiss();

在 onSuccess() 和 onFailure() 方法内部。

编辑：

如果您只想在上传所有文件后关闭对话框，那么您应该使用递归，正如我在以下 post:

的回答中所解释的那样

这意味着当列表大小变为零时，您可以关闭该对话框。

无法关闭 "for loop" 内的 addonsucesslistener() 内的进度对话框

Unable to dismiss the progressdialog inside the addonsucesslistener() which is inside "for loop"

java

android

firebase

firebase-storage

progressdialog