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我正在开发一个启动器。它让用户从列表中添加小部件，它工作正常。当用户向屏幕添加小部件时，我将有关小部件的信息（PackageName、ClassName 及其在屏幕上的坐标）存储在我的数据库中。

当应用程序重新启动（或设备本身）时，我通过代码添加这些（用户选择的）小部件：

// APPWIDGET_HOST_ID is any number you like
appWidgetManager = AppWidgetManager.getInstance(this);
appWidgetHost = new AppWidgetHost(this, APPWIDGET_HOST_ID);
AppWidgetProviderInfo newAppWidgetProviderInfo = new AppWidgetProviderInfo();

// Get an id
int appWidgetId = appWidgetHost.allocateAppWidgetId();

// Get the list of installed widgets
List<AppWidgetProviderInfo> appWidgetInfos = new ArrayList<AppWidgetProviderInfo>();
appWidgetInfos = appWidgetManager.getInstalledProviders();

for(int j = 0; j < appWidgetInfos.size(); j++)
{
    if (appWidgetInfos.get(j).provider.getPackageName().equals(PackageName) && appWidgetInfos.get(j).provider.getClassName().equals(ClassName))
    {
        // Get the full info of the required widget
        newAppWidgetProviderInfo = appWidgetInfos.get(j);
        break;
    }
 }

// Create Widget
AppWidgetHostView hostView …