Imitation google android quickly find contacts in alphabetical functions, looks like a lot of phones now have this feature, really easy to use them, how to achieve it? This is an example, not the complete address book program.

contacts\.classpath
........\.project
........\.svn\entries
........\....\format
........\....\pristine\00\0097f94652539316f9c5b293ca4c68a7503e0f7a.svn-base
........\....\........\.1\018e487d70f14910206d0840ab904bfb0983102e.svn-base
........\....\........\..\01cbbdb41eb039dcacf27ba00892a87b4494d3c7.svn-base
........\....\........\.2\024251d88d3a43794fab34f65f794db487efcdc0.svn-base
........\....\........\..\02acd3b9171118d574de84150544cec5ed5ad8b0.svn-base
........\....\........\.3\0317c4c9412763114c1eae0755b784611ce8c801.svn-base
........\....\........\..\0328cd44538b7380f35c3eb765be158efb645b31.svn-base
........\....\........\..\0343cd7686f222dd509a65e8ff4f274d1e54350c.svn-base
........\....\........\..\034dc0a7fd20d34af10ef467c17a4e0850e22f68.svn-base
........\....\........\..\0371166aa0e2d176cabd5f75203e32ff5ea1c8c3.svn-base
........\....\........\..\038d4dfe2967aa486077da93a512ebac38a79489.svn-base
........\....\........\.5\0569c1235cbb43f0f528a3c8c272b11b03bcdb82.svn-base
........\....\........\..\05a8be439e7bd5a38bf50508dd4f331b52bb5c2a.svn-base
........\....\........\..\05aa579f696b7a83b180af66799d393e6408c018.svn-base
........\....\........\.6\0628c4c30f573a453c83981408f9a9749b2acb3c.svn-base
........\....\........\.7\078bb55a488de1cda09664071e5daf537fcba5d7.svn-base
........\....\........\.9\0914af3d58bccf8e467e3db3206bf5424059fee6.svn-base
........\....\........\..\097a4fb27fe2751470e6bdf05d6becad10847016.svn-base
........\....\........\..\09ea65885b4080e515ef7064e816c77991c0757b.svn-base
........\....\........\..\09f12d8bb00814f9ee1088233b5d1b11d9d37e7b.svn-base
........\....\........\.a\0a3922cb044599e24c032c1c7187aea27adbec05.svn-base
........\....\........\..\0a44906360b4f6ed63c09c93cf8648dc6e23846b.svn-base
........\....\........\.b\0b4568ac8843109d06c2e26626e64b687cc17599.svn-base
........\....\........\..\0b4ef37ea1f2b678b2c894fee9164cc0dd77c623.svn-base
........\....\........\..\0b63ac0d47d41925449f19c35328b8db53e7081b.svn-base
........\....\........\.c\0cf8d12b642edcb42c6a0a49a5576d24fa32a4bc.svn-base
........\....\........\..\0cfcfc1e9d1f10f284e0010456078893a6340fed.svn-base
........\....\........\.d\0d04a370b55eeef337692dc62e967d27bf768aaa.svn-base
........\....\........\.e\0e2375717b8aa7ddf0c0c912787c2763bf9b2fb4.svn-base
........\....\........\.f\0fdb5bdec23158c9a74c972d0722187f4472cae9.svn-base
........\....\........\10\10ddea9be5775379ab7f3a29ad7d8fbf2af90871.svn-base
........\....\........\.1\1152296def82b79b2af7d42c0a4bd1ef1ba2659a.svn-base
........\....\........\.2\1223434ebfdd46e8d6e64f55f6fed6c3e072b51a.svn-base
........\....\........\..\1293f9a95b2589a91d530c690763aa701762f59f.svn-base
........\....\........\..\12e1155e6e79a12fe36f604a92300cf8be89e1fb.svn-base
........\....\........\.5\156c183e0aa096a04cb4cdaccbf0aff782ec0b14.svn-base
........\....\........\.6\1603b612eb58299637853677bb300a02c9425e0f.svn-base
........\....\........\.7\1723609a14d9c9b5c43470199888149b01afc94c.svn-base
........\....\........\..\17e4f9c6ff8be5bc1187dd82694045941e1d3cf2.svn-base
........\....\........\.8\189fd2b1ae214c8b5b59cad4aa2aba7b2ee17ca1.svn-base
........\....\........\.9\1945a76409db6244b041dac2cbdd34956ff31b40.svn-base
........\....\........\..\19f354b636a30c829ffaa95dce3def2bff4b8c35.svn-base
........\....\........\.b\1b2a17649dfc531fcf4c5c4dbb03de526eac76db.svn-base
........\....\........\..\1bc5a11deb846e438826281a8d62d37d51687f2f.svn-base
........\....\........\.c\1c15b7a4321d9699db9ce52ec40d39e46e5577ab.svn-base
........\....\........\.d\1db7433b2a228f04d09ce542bcbe765f4081376c.svn-base
........\....\........\.e\1e3479f7635b8c62e76576c188774e27652e4973.svn-base
........\....\........\..\1e3be5e7605663822a43247234cfbe2535850734.svn-base
........\....\........\..\1eccf8390329d01fab9d8eee451afad690259285.svn-base
........\....\........\..\1edf72ef14592af6d29425e1314eb8cbd9e2748d.svn-base
........\....\........\.f\1f471df06c20d66429fcedc0952dd5883d199838.svn-base
........\....\........\20\20102b689ea0f57fa16c6a3c514d8cf6acab1b68.svn-base
........\....\........\.1\210f8f95aaa65f633651cda7e81adf0ba

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