具有不同ListView数据的相同小部件
具有不同ListView数据的相同小部件
提问于 2018-06-23 01:10:53
我有一个具有ListView的简单AppWidget。
该小部件具有简单配置活动，您可以在其中选择要显示的数据集。该信息(int )存储在SharedPreferences中，稍后从RemoteViewsFactory中的SP获取。
一切都很完美，直到我在屏幕上添加了另一个Widget。如果被选中，新的Widget不会加载不同的数据，而是从以前的Widget中获取数据。
通过少量的调试，我认为我的onUpdate方法没有被调用，但我在这里找不到问题所在。
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;
}}
回答 1
Stack Overflow用户
回答已采纳
发布于 2018-06-23 06:27:28
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，而不是重用新实例。
所以我用每个小工具发送新的随机值数据，这样它就会正确更新。
updateAppWidget代码片段：
//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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原文链接：
https://stackoverflow.com/questions/50992720
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