[英]Posted image is not appearing in Firebase Recycler View
我正在嘗試從Firebase數據庫檢索所有用戶帖子,並希望借助Recycler View和Firebase Recycler Adapter在Main Activity上顯示它。 但是在成功將圖像上傳到Firebase數據庫之后,我可以在firebase控制台的storage部分中看到上傳的圖像,但是在數據庫部分中,它顯示類似-
com.google.android.gms.tasks.zzu@3c50f45
所以我認為問題出在這行代碼上:
downloadUrl = task.getResult().getStorage().getDownloadUrl().toString();
碼:
private Uri ImageUri;
private StorageReference PostsImagesRefrence;
private DatabaseReference UsersRef, PostsRef;
PostsImagesRefrence = FirebaseStorage.getInstance().getReference();
PostsRef = FirebaseDatabase.getInstance().getReference().child("Posts");
StorageReference filePath = PostsImagesRefrence.child("Post Images").child(ImageUri.getLastPathSegment() + postRandomName + ".jpg");
filePath.putFile(ImageUri).addOnCompleteListener(new OnCompleteListener<UploadTask.TaskSnapshot>()
{
@Override
public void onComplete(@NonNull Task<UploadTask.TaskSnapshot> task)
{
if(task.isSuccessful())
{
downloadUrl = task.getResult().getStorage().getDownloadUrl().toString();
Toast.makeText(PostActivity.this, "image uploaded successfully to Storage...", Toast.LENGTH_SHORT).show();
SavingPostInformationToDatabase();
}
else
{
String message = task.getException().getMessage();
Toast.makeText(PostActivity.this, "Error occured: " + message, Toast.LENGTH_SHORT).show();
}
}
});
設計視圖和實際輸出圖像:
請嘗試為我提供正確的代碼,作為我的新手並且不了解Android Studio並向我提供幫助,並希望完成此College Project。
嘗試改變
String userFullName = dataSnapshot.child("fullname").getValue().toString();
String userProfileImage = dataSnapshot.child("profileimage").getValue().toString();
至
String userFullName = dataSnapshot.child("fullname").getValue(String.class);
String userProfileImage = dataSnapshot.child("profileimage").getValue(String.class);
編輯:試試這個
dateRef.getDownloadUrl().addOnSuccessListener(new OnSuccessListener<Uri>() {
@Override
public void onSuccess(Uri downloadUrl)
{
downloadUrlString = downloadUrl.toString();
}
});
解決了這個問題,我正在使用舊的方法將圖像存儲到Firebase數據庫。
為解決此問題,進行了以下更改:
final StorageReference filePath = PostsImagesRefrence.child("Post Images").child(ImageUri.getLastPathSegment() + postRandomName + ".jpg");
final UploadTask uploadTask =filePath.putFile(ImageUri);
uploadTask.addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e)
{
String message =e.toString();
Toast.makeText(PostActivity.this, "Error occured: " + message, Toast.LENGTH_SHORT).show();
}
}).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>()
{
@Override
public void onSuccess(UploadTask.TaskSnapshot taskSnapshot)
{
Toast.makeText(PostActivity.this, "Image uploaded successfully to Storage...", Toast.LENGTH_SHORT).show();
Task<Uri> urlTask = 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();
}
downloadUrl= filePath.getDownloadUrl().toString();
return filePath.getDownloadUrl();
}
}).addOnCompleteListener(new OnCompleteListener<Uri>()
{
@Override
public void onComplete(@NonNull Task<Uri> task)
{
if (task.isSuccessful())
{
downloadUrl = task.getResult().toString();
Toast.makeText(PostActivity.this, "Stored Image Successfully to Database", Toast.LENGTH_SHORT).show();
SavingPostInformationToDatabase();
}
}
});
}
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