问题
Here's my code where i can retrieve the image Url in Toast message where it is unable to save it in firestore please tell me if there is another method to do it or is the problem where i store the URL:
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();
}
}
}
});
}
}
and in fire store the field is always coming null but it is saved in the firestorage .
Wanted to add an image for FireStore but coludn't
Thanks.
回答1:
This process is called AsyncTask, which is intended to perform a process before a process.
It works to upload the image and the data at the same time, so the image link does not store because it did not finish uploading the image, and this is in less than a split of a second.
You can use this method when the image is finished uploading, the data is stored in FireStore :
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 ();
}
});
Here be sure to upload the image first and then add ImageUrl to the 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();
}
});
}
});
}
});
}
}
来源：https://stackoverflow.com/questions/61826518/how-to-upload-image-url-uploaded-to-fire-storage-and-save-it-in-firestore-at-the