社交网络应用程序：个人资料照片显示不正确

Question

我使用 Java 语言创建了一个社交网络应用程序，该应用程序能够插入图片作为个人资料照片。如果我尝试上传我的照片，它可以工作，但如果其他用户尝试使用其他设备进行上传，他们看不到我的照片，我也看不到他们的照片。基本上每个人都使用自己的设备查看自己的照片。

然而，尽管我的头像上传正确，但它往往会在一段时间后消失。

如何解决？

截图：

https://i.stack.imgur.com/SXo99.jpg

尝试设置头像的代码：

firebaseFirestore.collection("Users").document(user_id).get().addOnCompleteListener(new OnCompleteListener<DocumentSnapshot>() {
        @Override
        public void onComplete(@NonNull Task<DocumentSnapshot> task) {

            if(task.isSuccessful()){

                if(task.getResult().exists()){

                    String name = task.getResult().getString("name");
                    String image = task.getResult().getString("image");
                    String about = task.getResult().getString("about");
                    String skills = task.getResult().getString("skills");

                    mainImageUri = Uri.parse(image);

                    setupName.setText(name);
                    setupAbout.setText(skills);
                    setupSkills.setText(about);

                    RequestOptions placeholderRequest = new RequestOptions();
                    placeholderRequest = placeholderRequest.placeholder(R.drawable.defaultuser);

                    Glide.with(getApplicationContext())
                            .setDefaultRequestOptions(placeholderRequest)
                            .load(image)
                            .into(setupImage);

                }

            } else {

                String error = task.getException().getMessage();

                Toast.makeText(SetupActivity.this, "C'è stato un problema, riprova per favore.", Toast.LENGTH_LONG).show();

            }

            progressBar.setVisibility(View.INVISIBLE);
            setupButton.setEnabled(true);
        }
    });

    setupButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

            final String user_name = setupName.getText().toString();
            final String about = setupAbout.getText().toString();
            final String userSkills = setupSkills.getText().toString();


            if (!TextUtils.isEmpty(user_name) && mainImageUri != null) {
            progressBar.setVisibility(View.VISIBLE);

            if (isChanged) {

                    user_id = firebaseAuth.getCurrentUser().getUid();
                    final StorageReference image_path = storageReference.child("profile_images").child(user_id + ".jpg");
                    image_path.putFile(mainImageUri).addOnCompleteListener(new OnCompleteListener<UploadTask.TaskSnapshot>() {
                        @Override
                        public void onComplete(@NonNull Task<UploadTask.TaskSnapshot> task) {

                            if (task.isSuccessful()) {

                                storeFirestore(task, user_name, about, userSkills, image_path);
                            } else {

                                Toast.makeText(SetupActivity.this, "C'è stato un problema, riprova per favore.", Toast.LENGTH_LONG).show();
                                progressBar.setVisibility(View.INVISIBLE);
                            }


                        }
                    });

                } else {


                storeFirestore(null, user_name, about, userSkills, null);
            }

            } else {

             if(TextUtils.isEmpty(user_name))
                {
                    Toast.makeText(SetupActivity.this, "Per favore, inserisci un nickname!", Toast.LENGTH_LONG).show();
                } else
                {
                    Toast.makeText(SetupActivity.this, "Per favore, inserisci una foto profilo!", Toast.LENGTH_LONG).show();
                }

            }
        }
    });

    setupImage.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {

                if (ContextCompat.checkSelfPermission(SetupActivity.this, android.Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_DENIED) {
                    Snackbar snackbar = Snackbar.make(view, "Hai autorizzato l'app ad accedere al tuo archivio esterno?", Snackbar.LENGTH_SHORT);
                    snackbar.show();
                    ActivityCompat.requestPermissions(SetupActivity.this, new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, 1);
                } else {
                   BringImagePicker();
                }
            } else {
                BringImagePicker();
            }
        }
    });

}

private void storeFirestore(Task<UploadTask.TaskSnapshot> task, String user_name,
                            String userSkills, String about, StorageReference image_path){

    Uri download_uri = null;
    if(task != null) {

         task.getResult().getStorage().getDownloadUrl();

    } else {

       download_uri = mainImageUri;

    }
    Map<String, String> userMap = new HashMap<>();
     userMap.put("skills", userSkills);
    userMap.put("name", user_name);
    userMap.put("about", about);
    userMap.put("image", download_uri.toString());
    userMap.put("user_id", user_id);


    firebaseFirestore.collection("Users").document(user_id).set(userMap).addOnCompleteListener(new OnCompleteListener<Void>() {
        @Override
        public void onComplete(@NonNull Task<Void> task) {
            if (task.isSuccessful()){

                Toast.makeText(SetupActivity.this, "Le impostazioni sono state aggiornate!", Toast.LENGTH_LONG).show();
                Intent mainIntent = new Intent(SetupActivity.this, MainActivity.class);
                startActivity(mainIntent);
                finish();
            } else {

                Toast.makeText(SetupActivity.this, "C'è stato un problema, riprova per favore.", Toast.LENGTH_LONG).show();

            }

            progressBar.setVisibility(View.INVISIBLE);
        }
    });
}

第一行中的“user_id”是“firebaseAuth.getCurrentUser().getUid();”

onActivityResult 的代码：

https://i.stack.imgur.com/BTRJv.png

Answer 1

这看起来不对：

Uri download_uri = null;
if(task != null) {

     task.getResult().getStorage().getDownloadUrl();

} else {

   download_uri = mainImageUri;

}

我建议研究getting a download URL（或here）上的文档，因为这是获取下载 URL 的唯一方法。

在你的情况下，应该是这样的：

private void storeFirestore(Task<UploadTask.TaskSnapshot> task, String user_name,
                            String userSkills, String about, StorageReference image_path){
    image_path.getDownloadUrl().addOnSuccessListener(new OnSuccessListener<Uri>() {
        @Override
        public void onSuccess(Uri download_uri) {
            Map<String, String> userMap = new HashMap<>();
            userMap.put("skills", userSkills);
            userMap.put("name", user_name);
            userMap.put("about", about);
            userMap.put("image", download_uri.toString());
            userMap.put("user_id", user_id);
    
            firebaseFirestore.collection("Users").document(user_id).set(userMap).addOnCompleteListener(new OnCompleteListener<Void>() {
                @Override
                public void onComplete(@NonNull Task<Void> task) {
                    if (task.isSuccessful()){
        
                        Toast.makeText(SetupActivity.this, "Le impostazioni sono state aggiornate!", Toast.LENGTH_LONG).show();
                        Intent mainIntent = new Intent(SetupActivity.this, MainActivity.class);
                        startActivity(mainIntent);
                        finish();
                    } else {
        
                        Toast.makeText(SetupActivity.this, "C'è stato un problema, riprova per favore.", Toast.LENGTH_LONG).show();
        
                    }
        
                    progressBar.setVisibility(View.INVISIBLE);
                }
            });   
        }
    });
}

Answer 2

根据文档，您需要使用 onSuccessListener 来确保下载 URL 已实际填写并可以使用。

我看到您调用了两次 storeFirestore 函数，第 79 行的一次使用带有 null 值的 image_path 参数。这可能是您在上面的 cmets 中提到的崩溃的原因。

你可以试试这样的：

private void storeFirestore(Task<UploadTask.TaskSnapshot> task, String user_name,
                            String userSkills, String about, StorageReference image_path){
    Uri download_uri = null;
    if (image_path != null) {
       download_uri = image_path.getDownloadUrl();
    }
    else if(task != null) {
       download_uri = task.getResult().getStorage().getDownloadUrl();
    } else {
       download_uri = mainImageUri;
    }
    
    download_uri.addOnSuccessListener(new OnSuccessListener<Uri>() {
        @Override
        public void onSuccess(Uri downloaded_uri) {
            Map<String, String> userMap = new HashMap<>();
            userMap.put("skills", userSkills);
            userMap.put("name", user_name);
            userMap.put("about", about);
            userMap.put("image", downloaded_uri.toString());
            userMap.put("user_id", user_id);

            firebaseFirestore.collection("Users").document(user_id).set(userMap).addOnCompleteListener(new OnCompleteListener<Void>() {
                @Override
                public void onComplete(@NonNull Task<Void> task) {
                    if (task.isSuccessful()){

                        Toast.makeText(SetupActivity.this, "Le impostazioni sono state aggiornate!", Toast.LENGTH_LONG).show();
                        Intent mainIntent = new Intent(SetupActivity.this, MainActivity.class);
                        startActivity(mainIntent);
                        finish();
                    } else {

                        Toast.makeText(SetupActivity.this, "C'è stato un problema, riprova per favore.", Toast.LENGTH_LONG).show();

                    }

                    progressBar.setVisibility(View.INVISIBLE);
                }
            });
        }
    });
}