Android devices come in many shapes and sizes. Screen sizes and pixel densities vary widely across the range of Android devices available on the market today. The Android platform categorizes screen types in terms of sizes (small, normal, and large) and pixel density (low, medium, and high).These characteristics effectively cover the variety of screen types available within the Android platform.
An application can provide custom resources for specific screen sizes and pixel densities (we cover this in Chapter 6,"Managing Application Resources").The <supports-screen> tag can be used to specify which Android types of screens the application supports.
For example, if the application supports QVGA screens (small) and HVGA screens (normal) regardless of pixel density, the <supports-screen> tag is configured as follows:
<supports-screens android:smallScreens="true" android:normalScreens="true" android:largeScreens"false" android:anyDensity="true"/>
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