java - 如何使用Java上传上传到Fire Storage的图像Url并将其同时保存在fireStore中

Question

这是我的代码，我可以在 Toast 消息中检索图像 Url，但无法将其保存在 firestore 中，请告诉我是否有其他方法可以做到这一点，或者是我存储 URL 的问题:

public class register extends AppCompatActivity {

     EditText emails;
    EditText passwords;
    EditText ages;
    Button registers;
    Button addImage;
    EditText country;

    FirebaseFirestore db;
    FirebaseAuth auth;
    FirebaseUser auth1;
    private StorageTask task;

    Uri url ;
    Uri imageUri;

    static final int IMAGE_REQUEST =2;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_register);


        auth = FirebaseAuth.getInstance();
        registers = findViewById(R.id.button);
        emails = findViewById(R.id.eamil);
        passwords = findViewById(R.id.password);
        ages=findViewById(R.id.age);
        country=findViewById(R.id.country);
        addImage = findViewById(R.id.button51);

         db =FirebaseFirestore.getInstance();





             registers.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String v_email = emails.getText().toString();
                String v_password = passwords.getText().toString();


                if (TextUtils.isEmpty(v_email)||TextUtils.isEmpty(v_password)){

                    Toast.makeText(register.this,"Eempty Credentials",Toast.LENGTH_SHORT).show();
                }else if(v_password.length()<6){

                    Toast.makeText(register.this,":password is short",Toast.LENGTH_SHORT).show();

                }else{









                        upload();
                        registerUser(v_email, v_password);




                }
            }
        });

             addImage.setOnClickListener(new View.OnClickListener() {
                 @Override
                 public void onClick(View v) {

                     openImage();

                 }
             });



    }

    private void registerUser(final String email, final String password) {

        auth.createUserWithEmailAndPassword(email,password).addOnCompleteListener(register.this, new OnCompleteListener<AuthResult>() {
            @Override
            public void onComplete(@NonNull Task<AuthResult> task) {

                if(task.isSuccessful()){


                    Map<String , Object> users = new HashMap<>();
                    users.put("Email", emails.getText().toString());
                    users.put("Password", passwords.getText().toString());
                    users.put("Country", country.getText().toString());
                    users.put("AGe", ages.getText().toString());
                    users.put("Image", url.toString());
                    auth1 = FirebaseAuth.getInstance().getCurrentUser();
                    db.collection("Users").document(auth1.getUid()).set(users).addOnCompleteListener(new OnCompleteListener<Void>() {
                        @Override
                        public void onComplete(@NonNull Task<Void> task) {

                            //Toast.makeText(com.example.pleasework.register.this,"registeration was successful",Toast.LENGTH_SHORT).show();

                        }
                    });



//                    startActivity(new Intent(com.example.pleasework.register.this, MainActivity.class));
//                    finish();


                }else{


                    Toast.makeText(com.example.pleasework.register.this,"Resgisteration fail",Toast.LENGTH_SHORT).show();
                }
            }
        });


    }
    public  String getFileExtension(Uri uri){

        ContentResolver contentResolver = getContentResolver();
        MimeTypeMap mimeTypeMap = MimeTypeMap.getSingleton();

        return mimeTypeMap.getExtensionFromMimeType(contentResolver.getType(uri));



    }

   public void  upload (){

        if (imageUri != null){


            final StorageReference fileRef  = FirebaseStorage.getInstance().getReference(System.currentTimeMillis()+getFileExtension(imageUri) );

            fileRef.putFile(imageUri)
                    .addOnCompleteListener(new OnCompleteListener<UploadTask.TaskSnapshot>() {
                        @Override
                        public void onComplete(@NonNull Task<UploadTask.TaskSnapshot> task) {

                            fileRef.getDownloadUrl().addOnSuccessListener(new OnSuccessListener<Uri>() {
                                @Override
                                public void onSuccess(Uri uri) {

                                    url = uri;
                                    Toast.makeText(register.this,"Upload Sucess" + url.toString(),Toast.LENGTH_SHORT).show();

                                }
                            });

                        }
                    });


        }


    }

    public  void openImage(){

        Intent intent = new Intent();
        intent.setType("image/");
        intent.setAction(Intent.ACTION_GET_CONTENT);
        startActivityForResult(intent,IMAGE_REQUEST);

    }

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

    }
}




            }
        });
    }


}

并且在 fire store 中，该字段总是为 null 但它保存在 firestorage 中。

想为 FireStore 添加图像但没有

谢谢。

Answer 1

这个过程叫做AsyncTask ，旨在在进程之前执行进程。

它的作用是同时上传图片和数据，所以图片链接没有存储，因为它没有上传完图片，而且这是不到一秒的时间。

当图片上传完成后，您可以使用此方法，数据存储在 FireStore 中:

   private void registerUser(final String email, final String password) {

            auth.createUserWithEmailAndPassword(email,password).addOnCompleteListener(register.this, new OnCompleteListener<AuthResult>() {
                @Override
                public void onComplete(@NonNull Task<AuthResult> task) {

                    if(task.isSuccessful()){
                       upload ();
                    }
});

这里确保先上传图像，然后将 ImageUrl 添加到 fireStore :

public void  upload (){

        if (imageUri != null){


            final StorageReference fileRef  = FirebaseStorage.getInstance().getReference(System.currentTimeMillis()+getFileExtension(imageUri) );

            fileRef.putFile(imageUri)
                    .addOnCompleteListener(new OnCompleteListener<UploadTask.TaskSnapshot>() {
                        @Override
                        public void onComplete(@NonNull Task<UploadTask.TaskSnapshot> task) {

                            fileRef.getDownloadUrl().addOnSuccessListener(new OnSuccessListener<Uri>() {
                                @Override
                                public void onSuccess(Uri uri) {

                                    url = uri;

                                Map<String , Object> users = new HashMap<>();
                                users.put("Email", emails.getText().toString());
                                users.put("Password", passwords.getText().toString());
                                users.put("Country", country.getText().toString());
                                users.put("AGe", ages.getText().toString());
                                users.put("Image", url.toString());
                                auth1 = FirebaseAuth.getInstance().getCurrentUser();

                    db.collection("Users").document(auth1.getUid()).set(users).addOnCompleteListener(new OnCompleteListener<Void>() {
                        @Override
                        public void onComplete(@NonNull Task<Void> task) {

                             Toast.makeText(register.this,"Upload Sucess" + url.toString(),Toast.LENGTH_SHORT).show();

                             }
                         });

                       }
                   });
                }
            }); 
        }

    }