具有不同 ListView 数据的相同小部件

Question

我有一个带有 ListView 的简单 AppWidget。
该小部件具有简单的配置 Activity，您可以在其中 select 显示要显示的数据集。该信息（int id）存储在 SharedPreferences 中，稍后从 RemoteViewsFactory 中的 SP 获取。
一切正常，直到我将另一个小部件添加到屏幕上。如果 selected，新的不会加载不同的数据，而是从以前的 Widget 中获取数据。
几乎没有调试，我认为我的 onUpdate 方法没有被调用，但我在这里找不到问题。

WidgetConfig.java

public class IngredientsWidgetConfigureActivity extends Activity implements RecipesAdapter.RecipesAdapterOnClickHandler {


int mAppWidgetId = AppWidgetManager.INVALID_APPWIDGET_ID;
RecipesAdapter mAdapter;


public IngredientsWidgetConfigureActivity(){
    super();
}

//save recipeId into SharedPrefs
static void saveSelectedRecipe (Context context, int appWidgetId, int selectedRecipe){
    SharedPreferences.Editor prefs = context.getSharedPreferences(AppConstants.PREFS_NAME, 0).edit();
    prefs.putInt(AppConstants.PREF_PREFIX_KEY + appWidgetId, selectedRecipe);
    prefs.apply();
}


@Override
protected void onCreate(@Nullable Bundle icicle) {
    super.onCreate(icicle);

    setResult(RESULT_CANCELED);

    setContentView(R.layout.ingredients_widget_configure);

    //setup RecyclerView
    ...

    Intent intent = getIntent();
    Bundle extras = intent.getExtras();

    if (extras != null){
        mAppWidgetId = extras.getInt(AppWidgetManager.EXTRA_APPWIDGET_ID, AppWidgetManager.INVALID_APPWIDGET_ID);
    }
    if (mAppWidgetId == AppWidgetManager.INVALID_APPWIDGET_ID){
        finish();
        return;
    }

}

@Override
public void onClick(Recipe recipe) {
    final Context context = IngredientsWidgetConfigureActivity.this;

    // When the button is clicked, store the recipe Id
    int selectedRecipe = recipe.id;
    saveSelectedRecipe(context, mAppWidgetId, selectedRecipe);

    // It is the responsibility of the configuration activity to update the app widget
    AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);
    IngredientsWidget.updateAppWidget(context, appWidgetManager, mAppWidgetId);

    // Make sure we pass back the original appWidgetId
    Intent resultValue = new Intent();
    resultValue.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, mAppWidgetId);
    setResult(RESULT_OK, resultValue);
    finish();
}

WidgetProvider

....  
static void updateAppWidget(final Context context, AppWidgetManager appWidgetManager,
                     int appWidgetId) {

    RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.ingredients_widget_layout);

    Intent intent = new Intent(context, WidgetRemoteViewsService.class);
    intent.putExtra(AppConstants.APP_WIDGET_ID_KEY, appWidgetId);
    views.setRemoteAdapter(R.id.widget_list_view, intent);


    //TODO: recipes are not changing in different widgets

    // Instruct the widget manager to update the widget
    appWidgetManager.updateAppWidget(appWidgetId, views);
}


@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {

    // There may be multiple widgets active, so update all of them
    for (int appWidgetId : appWidgetIds) {

        updateAppWidget(context, appWidgetManager, appWidgetId);


    }

}

最后是我的
RemoteViewsFactory.java

public WidgetRemoteViewsFactory (Context context, Intent intent){
    mContext = context;
    appWidgetId = intent.getIntExtra(AppConstants.APP_WIDGET_ID_KEY, 1);
}

@Override
public void onCreate() {

}

@Override
public void onDataSetChanged() {

    final long identityToken = Binder.clearCallingIdentity();

//get id from SharedPref
    RecipeDatabase mDb = RecipeDatabase.getInstance(mContext);
    SharedPreferences prefs = mContext.getSharedPreferences(AppConstants.PREFS_NAME, 0);
    recipeId = prefs.getInt(AppConstants.PREF_PREFIX_KEY + appWidgetId, 9999);


    recipe = mDb.recipeDAO().loadRecipe(recipeId);


    Binder.restoreCallingIdentity(identityToken);


}

@Override
public void onDestroy() {

}

@Override
public int getCount() {
    if (recipe == null) {
        return 0;
    } else {
        return recipe.ingredients.size();
    }
}

@Override
public RemoteViews getViewAt(int position) {
    if (position > recipe.ingredients.size()){
        return null;
    }


    RemoteViews remoteViews = new RemoteViews(mContext.getPackageName(), R.layout.widget_list_item);
    remoteViews.setTextViewText(R.id.widget_text, recipe.ingredients.get(position).getIngredient());

    return remoteViews;
}

@Override
public RemoteViews getLoadingView() {
    return null;
}

@Override
public int getViewTypeCount() {
    return 1;
}

@Override
public long getItemId(int position) {
    return position;
}

@Override
public boolean hasStableIds() {
    return true;
}

}

Answer 1

已解决... 我必须将新数据放入 updateAppWidget 中的 Intent 中，以便工厂加载新实例而不是重复使用新实例。
所以我用每个小部件发送新的随机值数据，所以它会正确更新。
updateAppWidget 片段：

//send intent and data to Adapter
    Intent intent = new Intent(context, WidgetRemoteViewsService.class);
    intent.putExtra(AppConstants.APP_WIDGET_ID_KEY, appWidgetId);

    //set random data to initialize new Factory
    Random rnd = new Random();
    intent.setData(Uri.fromParts("content", String.valueOf(rnd.nextInt()), null));

    views.setRemoteAdapter(R.id.widget_list_view, intent);

感谢@TheFedex87

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