Когда мой фрагмент Home использует обычные кнопки через намерение перейти в новый класс.В новом классе, когда я пытаюсь использовать RecylerVie
и Firebase для отображения данных, данные не отображаются, и приложение вылетает.
На моем Firebase узлы переходят из проекта -> в DataHome ->Дом 1.В Home 1 есть описание атрибутов, указания, ингредиенты, изображение, заголовок
В DataHome также есть другие узлы с именем Home2 и т. Д. Но в этом случае я только пытаюсь показать данные из Home1 в этом классе.
изображение базы данных
Логкат говорит, что Fatal Exception Main: Process: com.google.firebase.database.DatabaseException: Невозможно преобразовать объект типа java.lang.String вТип com.example.tmrecipes.Model.DataHome
Это класс:
public class BeefSamosa extends AppCompatActivity {
FirebaseDatabase mHomeFireBaseDatabase;
RecyclerView myhomeview;
private DatabaseReference DataHomeRef;
private LinearLayoutManager mLinearLayoutManager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_beef_samosa);
//Back Button
getSupportActionBar().setDisplayShowHomeEnabled(true);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setTitle("Beef Samosa");
//Recycler View
myhomeview = findViewById(R.id.beefview);
myhomeview.setHasFixedSize(true);
//set layout as LinearLayout
myhomeview.setLayoutManager(new LinearLayoutManager(this));
//send query to firebase database
mHomeFireBaseDatabase = FirebaseDatabase.getInstance();
DataHomeRef = mHomeFireBaseDatabase.getInstance().getReference("DataHome").child("Home1");
}
@Override
public boolean onOptionsItemSelected (MenuItem item){
int id = item.getItemId();
if(id == android.R.id.home){
//ends the activity
this.finish();
}
return super.onOptionsItemSelected(item);
}
@Override
protected void onStart() {
super.onStart();
Query query = FirebaseDatabase.getInstance()
.getReference("DataHome")
.child("Home1");
FirebaseRecyclerOptions<DataHome> options =
new FirebaseRecyclerOptions.Builder<DataHome>()
.setQuery(DataHomeRef, DataHome.class)
.build();
FirebaseRecyclerAdapter<DataHome,DataHomeViewHolder> firebaseRecyclerAdapter = new FirebaseRecyclerAdapter<DataHome, DataHomeViewHolder>(options) {
@NonNull
@Override
public DataHomeViewHolder onCreateViewHolder(ViewGroup parent, int viewtype) {
final View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.activity_home_deatil, parent, false);
return new DataHomeViewHolder(view);
}
@Override
protected void onBindViewHolder(@NonNull DataHomeViewHolder holder, int position, @NonNull DataHome model) {
holder.setDetails(getApplicationContext(), model.getTitle(), model.getImage(), model.getDescription() , model.getIngredients(), model.getDirections());
}
};
firebaseRecyclerAdapter.startListening();
myhomeview.setAdapter(firebaseRecyclerAdapter);
}
//DataHomeViewHolder class
public static class DataHomeViewHolder extends RecyclerView.ViewHolder {
View mview;
public DataHomeViewHolder(@NonNull View itemView) {
super(itemView);
mview = itemView;
}
public void setDetails(Context ctx, String title, String image, String description, String ingredients , String directions) {
//Views
TextView mHomeTitle = mview.findViewById(R.id.titlewords);
ImageView mHomeImage = mview.findViewById(R.id.loading_pic);
TextView mDescriptionTitle = mview.findViewById(R.id.descriptionwords);
TextView mIngredientsTitle = mview.findViewById(R.id.ingredientwords);
TextView mDirectionsTitle = mview.findViewById(R.id.directionwords);
//Set data to views
mHomeTitle.setText(title);
mDescriptionTitle.setText(description);
mIngredientsTitle.setText(ingredients);
mDirectionsTitle.setText(directions);
Picasso.get().load(image).into(mHomeImage);
}
}
}
Мой класс модели:
public class DataHome {
public String title ,image, description, ingredients, directions;
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getImage() {
return image;
}
public void setImage(String image) {
this.image = image;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public String getIngredients() {
return ingredients;
}
public void setIngredients(String ingredients) {
this.ingredients = ingredients;
}
public String getDirections() {
return directions;
}
public void setDirections(String directions) {
this.directions = directions;
}
public DataHome(String title, String image, String description, String ingredients, String directions){
this.title =title;
this.image = image;
this.description = description;
this.ingredients = ingredients;
this.directions=directions;
}
}
Редактировать: изменен класс:
открытый класс BeefSamosa расширяет AppCompatActivity {
private FirebaseRecyclerAdapter firebaseRecyclerAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_beef_samosa);
//Back Button
getSupportActionBar().setDisplayShowHomeEnabled(true);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setTitle("Beef Samosa");
RecyclerView recyclerView = findViewById(R.id.beef_view);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
DatabaseReference rootRef = FirebaseDatabase.getInstance().getReference();
Query query = rootRef.child("DataHome");
FirebaseRecyclerOptions<DataHome> firebaseRecyclerOptions = new FirebaseRecyclerOptions.Builder<DataHome>()
.setQuery(query, DataHome.class)
.build();
firebaseRecyclerAdapter = new FirebaseRecyclerAdapter<DataHome, DataHomeViewHolder>(firebaseRecyclerOptions) {
@Override
protected void onBindViewHolder(@NonNull DataHomeViewHolder dataHomeViewHolder, int position, @NonNull DataHome dataHome) {
dataHomeViewHolder.setDataHome(dataHome);
}
@Override
public DataHomeViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.homedetail, parent, false);
return new DataHomeViewHolder(view);
}
};
recyclerView.setAdapter(firebaseRecyclerAdapter);
}
@Override
protected void onStart() {
super.onStart();
firebaseRecyclerAdapter.startListening();
}
@Override
protected void onStop() {
super.onStop();
if (firebaseRecyclerAdapter!= null) {
firebaseRecyclerAdapter.stopListening();
}
}
@Override
public boolean onOptionsItemSelected (MenuItem item){
int id = item.getItemId();
if(id == android.R.id.home){
//ends the activity
this.finish();
}
return super.onOptionsItemSelected(item);
}
//DataHomeViewHolder class
private class DataHomeViewHolder extends RecyclerView.ViewHolder {
private TextView imagetoo, titletext, description, ingredients, directions;
DataHomeViewHolder(View itemView){
super(itemView);
imagetoo = itemView.findViewById(R.id.imagetoo);
titletext = itemView.findViewById(R.id.titletext);
description = itemView.findViewById(R.id.description);
ingredients = itemView.findViewById(R.id.ingredients);
directions = itemView.findViewById(R.id.directions);
}
void setDataHome(DataHome DataHome) {
String imageto = DataHome.getImage();
imagetoo.setText(imageto);
String titleto = DataHome.getTitle();
titletext.setText(titleto);
String descriptionto = DataHome.getDescription();
description.setText(descriptionto);
String ingredientsto = DataHome.getIngredients();
ingredients.setText(ingredientsto);
String directionsto = DataHome.getDirections();
directions.setText(directionsto);
}
}
}