image n'est pas récupéré dans ImageView de RecyclerView de Firebase

Question

MainActivity

public class MainActivity extends AppCompatActivity { 

    private static final String TAG = "MainActivity"; 

    public static final String ANONYMOUS = "anonymous"; 
    public static final int RC_SIGN_IN = 1; 
    private static final int RC_PHOTO_PICKER = 2; 
    private String mUsername; 

    // Firebase instance variables 
    private FirebaseDatabase mFirebaseDatabase; 
    private DatabaseReference mMessagesDatabaseReference; 
    private ChildEventListener mChildEventListener; 
    private FirebaseAuth mFirebaseAuth; 
    private FirebaseAuth.AuthStateListener mAuthStateListener; 
    private FirebaseStorage mFirebaseStorage; 
    private StorageReference mChatPhotosStorageReference; 
    private FirebaseRemoteConfig mFirebaseRemoteConfig; 

    private RecyclerView recyclerView; 
    private FloatingActionButton floatingActionButton; 

    PhotosAdapter contactsAdapter; 
    List<Photos> contactList; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 

     mUsername = ANONYMOUS; 
     recyclerView=(RecyclerView)findViewById(R.id.recyclerview); 
     floatingActionButton=(FloatingActionButton)findViewById(R.id.floatingactionbutton); 
     contactList = new ArrayList(); 
     contactsAdapter=new PhotosAdapter(contactList,getApplicationContext()); 

     // Initialize Firebase components 
     mFirebaseDatabase = FirebaseDatabase.getInstance(); 
     mFirebaseAuth = FirebaseAuth.getInstance(); 
     mFirebaseStorage = FirebaseStorage.getInstance(); 
     mFirebaseRemoteConfig = FirebaseRemoteConfig.getInstance(); 


     mMessagesDatabaseReference = mFirebaseDatabase.getReference().child("messages"); 
     mChatPhotosStorageReference = mFirebaseStorage.getReference().child("chat_photos"); 

     mAuthStateListener = new FirebaseAuth.AuthStateListener() { 
      @Override 
      public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) { 
       FirebaseUser user = firebaseAuth.getCurrentUser(); 
       if (user != null) { 
        // User is signed in 
        onSignedInInitialize(user.getDisplayName()); 
       } else { 
        // User is signed out 
        onSignedOutCleanup(); 
        startActivityForResult(
          AuthUI.getInstance() 
            .createSignInIntentBuilder() 
            .setIsSmartLockEnabled(false) 
            .setProviders(
              AuthUI.EMAIL_PROVIDER, 
              AuthUI.GOOGLE_PROVIDER) 
            .build(), 
          RC_SIGN_IN); 
       } 
      } 
     }; 

     recyclerView.setAdapter(contactsAdapter); 

     recyclerView.setLayoutManager(new GridLayoutManager(getApplicationContext(),5)); 


     floatingActionButton.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       Intent intent = new Intent(Intent.ACTION_GET_CONTENT); 
       intent.setType("image/jpeg"); 
       intent.putExtra(Intent.EXTRA_LOCAL_ONLY, true); 
       startActivityForResult(Intent.createChooser(intent, "Complete action using"), RC_PHOTO_PICKER); 

      } 
     }); 
    } 


    @Override 
    public void onActivityResult(int requestCode, int resultCode, Intent data) { 
     super.onActivityResult(requestCode, resultCode, data); 
     if (requestCode == RC_SIGN_IN) { 
      if (resultCode == RESULT_OK) { 
       // Sign-in succeeded, set up the UI 
       Toast.makeText(this, "Signed in!", Toast.LENGTH_SHORT).show(); 
      } else if (resultCode == RESULT_CANCELED) { 
       // Sign in was canceled by the user, finish the activity 
       Toast.makeText(this, "Sign in canceled", Toast.LENGTH_SHORT).show(); 
       finish(); 
      } 
     }else if (requestCode == RC_PHOTO_PICKER && resultCode == RESULT_OK) { 
      Uri selectedImageUri = data.getData(); 

      // Get a reference to store file at chat_photos/<FILENAME> 
      StorageReference photoRef = mChatPhotosStorageReference.child(selectedImageUri.getLastPathSegment()); 

      // Upload file to Firebase Storage 
      photoRef.putFile(selectedImageUri) 
        .addOnSuccessListener(this, new OnSuccessListener<UploadTask.TaskSnapshot>() { 
         public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) { 
          // When the image has successfully uploaded, we get its download URL 
          Uri downloadUrl = taskSnapshot.getDownloadUrl(); 

          // Set the download URL to the message box, so that the user can send it to the database 
          Photos friendlyMessage = new Photos(downloadUrl.toString()); 
          mMessagesDatabaseReference.push().setValue(friendlyMessage); 
         } 
        }); 
     } 
    } 
    @Override 
    protected void onResume() { 
     super.onResume(); 
     mFirebaseAuth.addAuthStateListener(mAuthStateListener); 
    } 

    @Override 
    protected void onPause() { 
     super.onPause(); 
     if (mAuthStateListener != null) { 
      mFirebaseAuth.removeAuthStateListener(mAuthStateListener); 
     } 
    } 

     private void onSignedInInitialize(String username) { 
     mUsername = username; 
     attachDatabaseReadListener(); 
    } 

    private void onSignedOutCleanup() { 
     mUsername = ANONYMOUS; 

    } 

    private void attachDatabaseReadListener() { 
     if (mChildEventListener == null) { 
      mChildEventListener = new ChildEventListener() { 
       @Override 
       public void onChildAdded(DataSnapshot dataSnapshot, String s) { 
        Photos friendlyMessage = dataSnapshot.getValue(Photos.class); 
        contactsAdapter.add(friendlyMessage); 
       } 

       public void onChildChanged(DataSnapshot dataSnapshot, String s) {} 
       public void onChildRemoved(DataSnapshot dataSnapshot) {} 
       public void onChildMoved(DataSnapshot dataSnapshot, String s) {} 
       public void onCancelled(DatabaseError databaseError) {} 
      }; 
      mMessagesDatabaseReference.addChildEventListener(mChildEventListener); 
     } 
    } 
} 

PhotosAdapter

public class PhotosAdapter extends RecyclerView.Adapter<PhotosAdapter.MyViewHolder> { 

    private List<Photos> photosList; 
    private Context context; 
    public static final String Position="AdapterPosition"; 

    public PhotosAdapter(List<Photos> contactsList, Context context) { 
     this.photosList = contactsList; 
     this.context = context; 
    } 

    @Override 
    public PhotosAdapter.MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
     View view = LayoutInflater.from(context).inflate(R.layout.list_item, null); 

     return new MyViewHolder(view); 
    } 

    @Override 
    public void onBindViewHolder(PhotosAdapter.MyViewHolder holder, int position) { 
     Photos contacts = photosList.get(position); 


     Glide.with(context).load(contacts.getPhotoUrl()).into(holder.contactimageView); 

    } 

    @Override 
    public int getItemCount() { 
     return photosList.size(); 
    } 

    public class MyViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{ 
     public ImageView contactimageView; 
     private final Context context; 

     public MyViewHolder(View itemView) { 
      super(itemView); 
      context = itemView.getContext(); 
      contactimageView = (ImageView) itemView.findViewById(R.id.imageview); 
      itemView.setOnClickListener(this); 
     } 

     @Override 
     public void onClick(View v) { 
      /* Intent intent = new Intent(context, ChatActivity.class); 
      intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 
      intent.putExtra(Position,getAdapterPosition()); 
      context.startActivity(intent);*/ 
     } 


     public void add(Photos photos){ 
     photosList.add(photos); 
    } 
} 

Photos

public class Photos { 
    private String photoUrl; 

    public Photos() { 
    } 

    public Photos(String photoUrl) { 
    this.photoUrl = photoUrl; 
    } 

    public String getPhotoUrl() { 
    return photoUrl; 
    } 

    public void setPhotoUrl(String photoUrl) { 
    this.photoUrl = photoUrl; 
    } 
} 

Ceci est mon code. Je suis en train de télécharger une image sur le bouton FloatingAction pour Firebase Stockage.L'image est téléchargée avec succès, mais je ne suis pas en mesure de récupérer l'image au ImageView de mon RecyclerView. Qu'est-ce que je fais mal? Je suis également en mesure de voir l'URL de l'image dans le stockage. Toujours pas en mesure de récupérer le message dans l'imageview de recyclerview. S'il vous plaît aider .......

Answer 1

vous pouvez essayer cela aussi: -

yourFragment.isResumed()