You do not need to make any changes to the emulator to write network-enabled applications. The emulator will use the Internet connection provided by your development computer and simulate true network coverage. Also, the emulator has a number of settings for simulating network latency and network transfer speeds, which can give you a better idea of the actual experience a user would have. For details on the network debugging features of the emulator, see the Android emulator documentation.
Because the emulator uses your desktop Internet connection, it is likely to be higher speed than a true Android device Internet connection will be.
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