获取我的主屏幕小部件的大小

我只想知道我当前的小部件有多大。我发现了很多设置最小尺寸的问题，但我不想设置它。相反，我想显示适合小部件的信息。

如果小部件太小，我需要隐藏一些东西，但我需要知道它的大小。我阅读了一些类的源代码，例如AppWidgetProvider，甚至文档。总是只有关于最小或最大尺寸的参考，但从来没有当前尺寸。

请指出我正确的资源。

不幸的是，仍然没有 API 可以从 AppWidget-Host 获取此信息。

您只能获取有关调整大小事件（Android 4.1+）的当前大小信息，并且只能从支持此功能的启动器（例如索尼 XPeria Launcher 以及某些第三方启动器）获取。

我关注了这个 stackoverflow 线程和 Android 开发者文档：

确定主屏幕的应用程序小部件空间网格大小 https://stackoverflow.com/questions/14244984/determine-the-homescreens-appwidgets-space-grid-size

https://developer.android.com/reference/android/appwidget/AppWidgetProvider.html#onAppWidgetOptionsChanged%28android.content.Context,%20android.appwidget.AppWidgetManager,%20int,%20android.os.Bundle%29 https://developer.android.com/reference/android/appwidget/AppWidgetProvider.html#onAppWidgetOptionsChanged%28android.content.Context,%20android.appwidget.AppWidgetManager,%20int,%20android.os.Bundle%29

以下是我确定小部件大小的代码，取自 Picture Calendar 2014（Play Store）：

        /* Get Device and Widget orientation. 
           This is done by adding a boolean value to 
           a port resource directory like values-port/bools.xml */

        mIsPortraitOrientation = getResources().getBoolean(R.bool.isPort);

        // Get min dimensions from provider info
        AppWidgetProviderInfo providerInfo = AppWidgetManager.getInstance(
            getApplicationContext()).getAppWidgetInfo(appWidgetId);

        // Since min and max is usually the same, just take min
        mWidgetLandWidth = providerInfo.minWidth;
        mWidgetPortHeight = providerInfo.minHeight;
        mWidgetPortWidth = providerInfo.minWidth;
        mWidgetLandHeight = providerInfo.minHeight;

        // Get current dimensions (in DIP, scaled by DisplayMetrics) of this
        // Widget, if API Level allows to
        mAppWidgetOptions = null;
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN)
            mAppWidgetOptions = getAppWidgetoptions(mAppWidgetManager,
                    appWidgetId);

        if (mAppWidgetOptions != null
                && mAppWidgetOptions
                        .getInt(AppWidgetManager.OPTION_APPWIDGET_MIN_WIDTH) > 0) {
            if (D.DEBUG_SERVICE)
                Log.d(TAG,
                        "appWidgetOptions not null, getting widget sizes...");
            // Reduce width by a margin of 8dp (automatically added by
            // Android, can vary with third party launchers)

            /* Actually Min and Max is a bit irritating, 
               because it depends on the homescreen orientation
               whether Min or Max should be used: */

            mWidgetPortWidth = mAppWidgetOptions
                    .getInt(AppWidgetManager.OPTION_APPWIDGET_MIN_WIDTH);
            mWidgetLandWidth = mAppWidgetOptions
                    .getInt(AppWidgetManager.OPTION_APPWIDGET_MAX_WIDTH);
            mWidgetLandHeight = mAppWidgetOptions
                    .getInt(AppWidgetManager.OPTION_APPWIDGET_MIN_HEIGHT);
            mWidgetPortHeight = mAppWidgetOptions
                    .getInt(AppWidgetManager.OPTION_APPWIDGET_MAX_HEIGHT);

            // Get the value of OPTION_APPWIDGET_HOST_CATEGORY
            int category = mAppWidgetOptions.getInt(AppWidgetManager.OPTION_APPWIDGET_HOST_CATEGORY, -1);

            // If the value is WIDGET_CATEGORY_KEYGUARD, it's a lockscreen
            // widget (dumped with Android-L preview :-( ).
            mIsKeyguard = category == AppWidgetProviderInfo.WIDGET_CATEGORY_KEYGUARD;

        } else {
            if (D.DEBUG_SERVICE)
                Log.d(TAG,
                        "No AppWidgetOptions for this widget, using minimal dimensions from provider info!");
            // For some reason I had to set this again here, may be obsolete
            mWidgetLandWidth = providerInfo.minWidth;
            mWidgetPortHeight = providerInfo.minHeight;
            mWidgetPortWidth = providerInfo.minWidth;
            mWidgetLandHeight = providerInfo.minHeight;
        }

        if (D.DEBUG_SERVICE)
            Log.d(TAG, "Dimensions of the Widget in DIP: portWidth =  "
                    + mWidgetPortWidth + ", landWidth = " + mWidgetLandWidth
                    + "; landHeight = " + mWidgetLandHeight
                    + ", portHeight = " + mWidgetPortHeight);

        // If device is in port oriantation, use port sizes
        mWidgetWidthPerOrientation = mWidgetPortWidth;
        mWidgetHeightPerOrientation = mWidgetPortHeight;

        if (!mIsPortraitOrientation)
        {
            // Not Portrait, so use landscape sizes
            mWidgetWidthPerOrientation = mWidgetLandWidth;
            mWidgetHeightPerOrientation = mWidgetLandHeight;
        }

在 Android 4.1+ 上，您现在可以在 DIP 中获得当前设备方向的 Widget 的当前大小。要知道您的小部件有多少个主屏幕网格单元宽和高，您必须将其除以单元格大小。默认值为 74dip，但这可能会因使用不同的设备或启动器而有所不同。允许更改网格的自定义启动器对于 Widget 开发人员来说是一件痛苦的事情。

在 Android

获得有关方向更改的通知以重绘小部件是另一个主题。

重要的：如果您允许用户拥有多个您的 Widget，您必须根据他们的 Id 对每个 Widget 进行此计算！