Я нашел здесь несколько тем, но ни один из них не посвящен этому конкретному вопросу.Я храню список массивов в Shared Preferences и Gson во фрагменте (первый пример кода ниже) RemoteViewsFactory также будет реализован (2-й код).Этот список будет отображаться в виджете.Получу ли я список непосредственно в WidgetProvider (4-й код)?Или я отправляю его из класса Fragment в класс Provider?Я впервые получаю SharedPreferences в виджете. Заранее спасибо.
public class IngredientsFragment extends Fragment
{
private static final String TAG = IngredientsFragment.class.getSimpleName();
@BindView(R.id.recyclerview_ingredients)
RecyclerView mIngredientRecyclerView;
ArrayList<Ingredients> ingredientsArrayList;
Recipes recipes;
// Final Strings to store state information about the list of ingredients and list index
private static final String KEY_INGREDIENTS_LIST = "ingredients_list";
/**
* Mandatory empty constructor for the fragment manager to instantiate the fragment
*/
public IngredientsFragment()
{
}
/**
* Inflates the fragment layout file and sets the correct resource for the image to display
*/
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
//Inflate the Ingredients fragment layout
View rootView = inflater.inflate(R.layout.fragment_ingredient, container, false);
// Bind the views
ButterKnife.bind(this, rootView);
Bundle bundle = this.getArguments();
if (bundle != null)
{
recipes = getArguments().getParcelable("Recipes");
ingredientsArrayList = new ArrayList<>();
ingredientsArrayList = recipes.getRecipeIngredients();
if (savedInstanceState != null)
{
//Restore the fragment's state here
ingredientsArrayList = savedInstanceState.getParcelableArrayList(KEY_INGREDIENTS_LIST);
}
RecyclerView.LayoutManager mLayoutManager = new LinearLayoutManager(getContext());
mIngredientRecyclerView.setLayoutManager(mLayoutManager);
Log.i("listIngredients", ingredientsArrayList.size() + "");
IngredientsAdapter ingredientsAdapter = new IngredientsAdapter(ingredientsArrayList, getContext());
mIngredientRecyclerView.setAdapter(ingredientsAdapter);
mIngredientRecyclerView.addItemDecoration(new VerticalSpacingDecoration(25));
//Store Ingredients in SharedPreferences
SharedPreferences appSharedPrefs = PreferenceManager.getDefaultSharedPreferences((getActivity()).getApplicationContext());
SharedPreferences.Editor prefsEditor = appSharedPrefs.edit();
Gson gson = new Gson();
String json = gson.toJson(ingredientsArrayList);
prefsEditor.putString("IngredientsList_Widget", json);
prefsEditor.apply();
}
return rootView;
}
@Override
public void onSaveInstanceState(Bundle outState)
{
super.onSaveInstanceState(outState);
//Save the fragment's state here
outState.putParcelableArrayList(KEY_INGREDIENTS_LIST, ingredientsArrayList);
super.onSaveInstanceState(outState);
}
}
Класс RemoteViewFactory:
public class RecipeWidgetViewFactory implements RemoteViewsService.RemoteViewsFactory
{
private ArrayList<Ingredients> mIngredientsList;
private Context mContext;
public RecipeWidgetViewFactory(Context context)
{
mContext = context;
}
@Override
public void onCreate() {
}
@Override
public int getCount()
{
return mIngredientsList.size();
}
@Override
public int getViewTypeCount() {
return 1;
}
@Override
public RemoteViews getViewAt(int position) {
Ingredients ingredient = mIngredientsList.get(position);
RemoteViews itemView = new RemoteViews(mContext.getPackageName(), R.layout.ingredient_list_item);
itemView.setTextViewText(R.id.ingredient_quantity, ingredient.getIngredientQuantity());
itemView.setTextViewText(R.id.ingredient_measure, ingredient.getIngredientMeasure());
itemView.setTextViewText(R.id.ingredient_name, ingredient.getIngredientName());
Intent intent = new Intent();
intent.putExtra(RecipeWidgetProvider.EXTRA_ITEM, ingredient);
return itemView;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public boolean hasStableIds() {
return true;
}
@Override
public void onDataSetChanged() {
//code structure based on this link:
//https://stackoverflow.com/questions/37927113/how-to-store-and-retrieve-an-object-from-gson-in-android
SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(mContext);
Gson gson = new Gson();
Type type = new TypeToken<List<Ingredients>>() {}.getType();
String gsonString = sharedPreferences.getString("userImages", "");
mIngredientsList = gson.fromJson(gsonString, type);
}
@Override
public RemoteViews getLoadingView() {
return null;
}
@Override
public void onDestroy() {
}
}
Класс RemoteViewService.
public class RecipeWidgetService extends RemoteViewsService
{
@Override
public RemoteViewsFactory onGetViewFactory(Intent intent)
{
return new RecipeWidgetViewFactory(getApplicationContext());
}
}
Класс WidgetProvider.
/**
* Implementation of App Widget functionality.
*/
public class RecipeWidgetProvider extends AppWidgetProvider {
//The following code is based on the code in these links:
//https://joshuadonlan.gitbooks.io/onramp-android/content/widgets/collection_widgets.html
//http://www.vogella.com/tutorials/AndroidWidgets/article.html
public static final String EXTRA_ITEM =
"annin.my.android.RecipeWidgetProvider.EXTRA_ITEM";
/*
This method is called once a new widget is created as well as every update interval.
*/
@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager,
int[] appWidgetIds) {
for (int i = 0; i < appWidgetIds.length; i++) {
// Construct the RemoteViews object
RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.recipe_widget_provider);
// Register an onClickListener
Intent intent = new Intent(context, RecipeWidgetProvider.class);
intent.setAction(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, appWidgetIds);
// Instruct the widget manager to update the widget
// appWidgetManager.updateAppWidget(appWidgetId, views);
}
// Build the intent to call the service
Intent intent = new Intent(context.getApplicationContext(),
RecipeWidgetService.class);
intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, appWidgetIds);
// Update the widgets via the service
context.startService(intent);
}
@Override
public void onReceive(Context context, Intent intent) {
super.onReceive(context, intent);
}
@Override
public void onEnabled (Context context){
// Enter relevant functionality for when the first widget is created
}
@Override
public void onDisabled (Context context){
// Enter relevant functionality for when the last widget is disabled
}
}