问题
I uploaded four images on firebase storage now I want to store the four images reference in a single json tree in the firebase database. The code i have adds the images url reference for a single image to the four different fields in the database, instead of inserting each image Url reference to its respective field in the database. How can i get the specific url reference for each image and insert it in the field meant for it in the firebase database. Below is my uploadImage method.
enter code here
private void uploadImage(final String note){
int j=0;
Uri[] uri=new Uri[selectData.size()];
final ArrayList<String> storeTask = new ArrayList<>();
while(j<selectData.size()){ uri[j] = selectData.get(j);
storage = FirebaseStorage.getInstance();
storageReference = storage.getReference();
final ProgressDialog progressDialog = new ProgressDialog(this);
progressDialog.setTitle("Uploading.....");
progressDialog.show();
ref = storageReference.child("/" + note
+ "/" + uri[j].getLastPathSegment());
//final int i=j;
uploadTask = ref.putFile(uri[j]);
final int finalJ = j;
uploadTask.addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
@Override
public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
progressDialog.dismiss();
uploadTask.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 ref.getDownloadUrl();
}
}).addOnCompleteListener(new OnCompleteListener<Uri>() {
@Override
public void onComplete(@NonNull Task<Uri> task) {
if (task.isSuccessful()) {
switch(finalJ){
case 0:
FirebaseDatabase.getInstance().getReference()
.child("notes")
.child(note)
.child("attach_url").setValue(task.getResult().toString());
break;
case 1:
FirebaseDatabase.getInstance().getReference()
.child("notes")
.child(note)
.child("attach_url1").setValue(task.getResult().toString());
break;
case 2:
FirebaseDatabase.getInstance().getReference()
.child("notes")
.child(note)
.child("attach_url2").setValue(task.getResult().toString());
break;
case 3:
FirebaseDatabase.getInstance().getReference()
.child("notes")
.child(note)
.child("attach_url3").setValue(task.getResult().toString());
break;
default:
break;
}
}
}
});
}
}).addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
progressDialog.dismiss();
Toast.makeText(NewNoteActivity.this, "Failed" + e.getMessage(), Toast.LENGTH_LONG).show();
}
}).addOnProgressListener(new OnProgressListener<UploadTask.TaskSnapshot>() {
@Override
public void onProgress(@NonNull UploadTask.TaskSnapshot snapshot) {
double progress = (100.0 * snapshot.getBytesTransferred() / snapshot.getTotalByteCount());
progressDialog.setMessage("Uploaded " + (int) progress + "%");
}
});
j++;
}
}
来源：https://stackoverflow.com/questions/64777243/how-to-upload-multiple-images-on-firebase-storage