how to fix application for multiple screen size

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http://stackoverflow.com – i have created an application in 2.2 version, if i run it in normal phone it works fine. but in tablet still it works fine but the label, textveiw and other things remain in the same size of the mobile phone. I have used this code but its is not working. <supports-screens android:largeScreens="true" android:normalScreens="true" android:smallScreens="true" android:anyDensity="true" /> Is their any other wayto do so, that my application look good in tablet tooo. (HowTos)