android - 如何修复第二次点击后更新的小部件 View

Question

我正在制作一个小部件，顶部有一个 GridView ，下面有一个 ListView ，当用户从网格中选择时，下面的 ListView 会更新。但我面临这些问题:首先，在我重新调整大小两次之前，小部件不会显示 gridView。其次，当网格出现时， ListView 得到更新，但在第二次单击时。那么无论我点击它多少次，该值都不会改变。

我试过强制更新 View ，但似乎没有任何效果。

这是我的更新小部件功能:

public static int viewIndex = 0;
static void updateAppWidget(Context context, AppWidgetManager appWidgetManager,
                            int appWidgetId) {

    Bundle options = appWidgetManager.getAppWidgetOptions(appWidgetId);
    int Height = options.getInt(AppWidgetManager.OPTION_APPWIDGET_MIN_HEIGHT);
    RemoteViews views;

    if (Height<300) {
        views = new RemoteViews(context.getPackageName(), R.layout.ingredient_widget_provider);
        Intent intent = new Intent(context,MainActivity.class);
        PendingIntent pendingIntent = PendingIntent.getActivity(context,0,intent,PendingIntent.FLAG_UPDATE_CURRENT);
        views.setOnClickPendingIntent(R.id.appwidget_text,pendingIntent);
    }
    else{
        views = getIngredientsList(context,appWidgetId);

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

}

这里是设置 View 的函数:

private static RemoteViews getIngredientsList(Context context,int appWidgetId) {
    AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);
    RemoteViews views = new RemoteViews(context.getPackageName(),R.layout.widget_ings_layout);
    Intent intent = new Intent(context,GridWidgetService.class);
    views.setRemoteAdapter(R.id.widget_grid_view,intent);

        if (viewIndex != 0) {
            appWidgetManager.updateAppWidget(appWidgetId, views);
            Intent ListIntent = new Intent(context, ListWidgetService.class);
            ListIntent.putExtra("extra_id", viewIndex);
            views.setRemoteAdapter(R.id.widget_list_view, ListIntent);
        }
    Intent appIntent = new Intent(context, IngredientWidgetProvider.class);
    appIntent.setAction(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
    appIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId);
    PendingIntent appPendingIntent = PendingIntent.getBroadcast(context, 0,
            appIntent, PendingIntent.FLAG_UPDATE_CURRENT);
    views.setPendingIntentTemplate(R.id.widget_grid_view, appPendingIntent);
    return views;

}

这是 onRecieve:

 public void onReceive(Context context, Intent intent) {
    if(intent.getAction().equals(AppWidgetManager.ACTION_APPWIDGET_UPDATE)){
         viewIndex = intent.getIntExtra("extra_id_grid",0);
        int appWidgetId = intent.getIntExtra(AppWidgetManager.EXTRA_APPWIDGET_ID,
                AppWidgetManager.INVALID_APPWIDGET_ID);
        Toast.makeText(context,"position "+viewIndex,Toast.LENGTH_LONG).show();

        AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);

        updateAppWidget(context,appWidgetManager,appWidgetId);
        appWidgetManager.notifyAppWidgetViewDataChanged(appWidgetId,R.id.widget_list_view);
    }
    super.onReceive(context, intent);
}

更新:

 @Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
    update(context,appWidgetManager,appWidgetIds);
}
public static void update(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds){
    for (int appWidgetId : appWidgetIds) {
        updateAppWidget(context, appWidgetManager, appWidgetId);
    }
}

onOptionsChanged

@Override
public void onAppWidgetOptionsChanged(Context context, AppWidgetManager appWidgetManager, int appWidgetId, Bundle newOptions) {
    updateAppWidget(context,appWidgetManager,appWidgetId);
    super.onAppWidgetOptionsChanged(context, appWidgetManager, appWidgetId, newOptions);
}

更新:我的 github 链接:https://github.com/basma11elmihy/bakingApp

Answer 1

最终我能够解决这个问题: 结果我无法在我正在做的远程 View 适配器中发出网络请求，这就是为什么它只在第二次调整大小后更新，现在我在 Intent 服务中发出网络请求，我从该服务强制更新，如下所示:

 public static void InflateList(Context context, int viewIndex) {
    Intent intent = new Intent(context,GridIntentService.class);
    con = context;
    intent.setAction("InflateList");
    intent.putExtra("viewIndex",viewIndex);
    context.startService(intent);
}

@Override
protected void onHandleIntent(@Nullable Intent intent) {
    if(intent != null) {
        if (intent.getAction().equals("InflateGrid")) {
            getGridData();
        }
        if (intent.getAction().equals("InflateList")){
            int index = intent.getIntExtra("viewIndex",0);
            getListData(index);
        }
    }
}

private void getListData(final int index) {
    StringRequest request = new StringRequest(url, new Response.Listener<String>() {
        @Override
        public void onResponse(String response) {
            GsonBuilder gsonBuilder = new GsonBuilder();
            Gson gson = gsonBuilder.create();
            RecipesModel[] recipesModels = gson.fromJson(response, RecipesModel[].class);
            mData = new ArrayList<>(Arrays.asList(recipesModels));
            model = mData.get(index);
            ings = model.getIngredients();
            AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(con);
            int[] appWidgetIds = appWidgetManager.getAppWidgetIds(new ComponentName(con, IngredientWidgetProvider.class));
        //    appWidgetManager.notifyAppWidgetViewDataChanged(appWidgetIds, R.id.widget_list_view);
            IngredientWidgetProvider.update(con,appWidgetManager,appWidgetIds,mData,ings);


        }
    }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
           Log.e("error","volley list error");

        }
    });
    RequestQueue queue = Volley.newRequestQueue(this);
    queue.add(request);
}

然后如上代码我在widgetProvider主类的update函数的参数中发送了数据，从那里我使用 Intent 将数据发送到 RemoteViewFactory。但事实证明小部件 Intent 与 Activity Intent 不同，它不发送 Parcalable 数据，所以我将 Parcalable 数据转换为字符串，并将其作为额外发送。使用这种方式:

RemoteViews views = new RemoteViews(context.getPackageName(),R.layout.widget_ings_layout);
    Intent intent = new Intent(context,GridWidgetService.class);
    String dumb = new Gson().toJson(mData);
    intent.setData(Uri.fromParts("scheme",dumb,null));
    views.setRemoteAdapter(R.id.widget_grid_view,intent);

然后像这样在远程适配器中取回数据:

 public ListRemoteViewFactory(Context context, Intent intent) {
    this.context = context;
    this.stringData = String.valueOf(intent.getData().getSchemeSpecificPart());

}

因为widget intent也得用setData而不是putExtra 像activity Intent这将使它每次都调用 OnGetViewFactory 而不是一次。在这里解释:

RemoteViewFactory onDataSetChanged() only called once per notifyAppWidgetViewDataChanged()