아래는 삼성에서 안드로이드 마켓 개발자들에게 보낸 메일 입니다. 
3번 이하부터는 일반적인 안드로이드 멀티 스크린 지원에 필요한 기술들에 대한 내용이고 
갤럭시탭만의 특성은 2번이네요. 계산을 해보니 해상도가 400dip x 682dip 가 나옵니다.

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Developing applications for Samsung Android Tablet

1.  Make sure you have “hdpi” resources in your application package. The tablet belongs to the class of
device that require hdpi resources for display.

2.       When programmatically scaling bitmap resources, note the following values are default for this device

DeviceMetrics.density = 240
DeviceMetrics.xdpi = 168
DeviceMetrics.ydpi = 168
The density system property value has been set as
[ro.sf.lcd_density]:[240]

3.       When using bitmap resources like advertisement banners, work with your ad vendor to get the correct banner size. When you can scale the bitmap - do it programmatically by getting the device height and width at runtime

WindowManager mWMgr = (WindowManager)context.getSystemService(Context.WINDOW_SERVICE);
int width = mWMgr.getDefaultDisplay().getWidth();
int height - mWMgr.getDefaultDisplay().getHeight();

4.       Android Market filters out applications based on the values specified in the AndroidManifest.xml

The 7” inch tablet belongs to “large” screens category. So, for applications which have minSDKVersion=3, define support-screens tag explicitly as
<supports-screens android:largeScreens=“true” android:anyDensity=“true” />

5.       Majority of the devices in the android ecosystem are API level 4 or greater. So, consider porting

over our application with minSDKVersion=4 or greater. This allows you to add “hpdi” resources in your application package. If the system cannot find the hdpi resources and android:anyDensity=”true” has been set, the existing resources will be scaled which may not give the user the best experience.

6.       We also strongly recommend you to follow the generic compatibility guidelines like

·         In XML layout, Use wrap_content, fill_parent

·         Don’t use AbsoluteLayout (use FrameLayout instead)

·         NEVER use hard-coding for pixel value, use dip (density independent pixel)

·         Use resources according to each density, resolution category
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