AutoCompleteTextView实现联想输入

本文使用AutoCompleteTextView实现联想输入，实现了中文对应的拼音搜索、中文首字母搜索和中文搜索。下拉菜单使用了自定义的控件，可以自己设计样式，方便了项目中使用。自定义adapter实现Filterable接口，实现中文对应的拼音搜索、中文首字母搜索和中文搜索。其中使用了两个工具类，一个是中文转字母的工具类，一个是获取中文首字母的工具类，具体代码如下：

1、中文转换成对应的拼音

/*** An object to convert Chinese character to its corresponding pinyin string. For characters with* multiple possible pinyin string, only one is selected according to collator. Polyphone is not* supported in this implementation. This class is implemented to achieve the best runtime* performance and minimum runtime resources with tolerable sacrifice of accuracy. This* implementation highly depends on zh_CN ICU collation data and must be always synchronized with* ICU.** Currently this file is aligned to zh.txt in ICU 4.6*/
public class HanziToPinyin{/*** Unihans array. Each unihans is the first one within same pinyin. Use it to determine pinyin* for all ~20k unihans.*/public static final char[] UNIHANS = {'\u5475', '\u54ce', '\u5b89', '\u80ae', '\u51f9','\u516b', '\u6300', '\u6273', '\u90a6', '\u5305', '\u5351', '\u5954', '\u4f3b','\u5c44', '\u8fb9', '\u6807', '\u618b', '\u90a0', '\u69df', '\u7676', '\u5cec','\u5693', '\u5a47', '\u98e1', '\u4ed3', '\u64cd', '\u518a', '\u5d7e', '\u564c','\u53c9', '\u9497', '\u8fbf', '\u4f25', '\u6284', '\u8f66', '\u62bb', '\u67fd','\u5403', '\u5145', '\u62bd', '\u51fa', '\u6b3b', '\u63e3', '\u5ddd', '\u75ae','\u5439', '\u6776', '\u9034', '\u75b5', '\u5306', '\u51d1', '\u7c97', '\u6c46','\u5d14', '\u90a8', '\u6413', '\u5491', '\u5927', '\u75b8', '\u5f53', '\u5200','\u6dc2', '\u5f97', '\u6265', '\u706f', '\u6c10', '\u55f2', '\u7538', '\u5201','\u7239', '\u4ec3', '\u4e1f', '\u4e1c', '\u5517', '\u561f', '\u5073', '\u5806','\u9413', '\u591a', '\u5a40', '\u8bf6', '\u5940', '\u97a5', '\u800c', '\u53d1','\u5e06', '\u65b9', '\u98de', '\u5206', '\u4e30', '\u8985', '\u4ecf', '\u7d11','\u4f15', '\u65ee', '\u8be5', '\u7518', '\u5188', '\u768b', '\u6208', '\u7d66','\u6839', '\u5e9a', '\u5de5', '\u52fe', '\u4f30', '\u74dc', '\u7f6b', '\u5173','\u5149', '\u5f52', '\u886e', '\u5459', '\u54c8', '\u54b3', '\u9878', '\u82c0','\u84bf', '\u8bc3', '\u9ed2', '\u62eb', '\u4ea8', '\u5677', '\u543d', '\u9f41','\u5322', '\u82b1', '\u6000', '\u72bf', '\u5ddf', '\u7070', '\u660f', '\u5419','\u4e0c', '\u52a0', '\u620b', '\u6c5f', '\u827d', '\u9636', '\u5dfe', '\u52a4','\u5182', '\u52fc', '\u530a', '\u5a1f', '\u5658', '\u519b', '\u5494', '\u5f00','\u520a', '\u95f6', '\u5c3b', '\u533c', '\u524b', '\u80af', '\u962c', '\u7a7a','\u62a0', '\u5233', '\u5938', '\u84af', '\u5bbd', '\u5321', '\u4e8f', '\u5764','\u6269', '\u5783', '\u6765', '\u5170', '\u5577', '\u635e', '\u4ec2', '\u52d2','\u5844', '\u5215', '\u5006', '\u5941', '\u826f', '\u64a9', '\u5217', '\u62ce','\u3007', '\u6e9c', '\u9f99', '\u779c', '\u565c', '\u5a08', '\u7567', '\u62a1','\u7f57', '\u5463', '\u5988', '\u973e', '\u5ada', '\u9099', '\u732b', '\u9ebc','\u6c92', '\u95e8', '\u753f', '\u54aa', '\u7720', '\u55b5', '\u54a9', '\u6c11','\u540d', '\u8c2c', '\u6478', '\u54de', '\u6bea', '\u62cf', '\u5b7b', '\u56e1','\u56ca', '\u5b6c', '\u8bb7', '\u9981', '\u6041', '\u80fd', '\u59ae', '\u62c8','\u5b22', '\u9e1f', '\u634f', '\u60a8', '\u5b81', '\u599e', '\u519c', '\u7fba','\u5974', '\u597b', '\u8650', '\u632a', '\u5594', '\u8bb4', '\u8db4', '\u62cd','\u7705', '\u4e53', '\u629b', '\u5478', '\u55b7', '\u5309', '\u4e15', '\u504f','\u527d', '\u6c15', '\u59d8', '\u4e52', '\u948b', '\u5256', '\u4ec6', '\u4e03','\u6390', '\u5343', '\u545b', '\u6084', '\u767f', '\u4fb5', '\u9751', '\u909b','\u4e18', '\u66f2', '\u5f2e', '\u7f3a', '\u590b', '\u5465', '\u7a63', '\u5a06','\u60f9', '\u4eba', '\u6254', '\u65e5', '\u8338', '\u53b9', '\u5982', '\u5827','\u6875', '\u95f0', '\u82e5', '\u4ee8', '\u6be2', '\u4e09', '\u6852', '\u63bb','\u8272', '\u68ee', '\u50e7', '\u6740', '\u7b5b', '\u5c71', '\u4f24', '\u5f30','\u5962', '\u7533', '\u5347', '\u5c38', '\u53ce', '\u4e66', '\u5237', '\u6454','\u95e9', '\u53cc', '\u8c01', '\u542e', '\u5981', '\u53b6', '\u5fea', '\u635c','\u82cf', '\u72fb', '\u590a', '\u5b59', '\u5506', '\u4ed6', '\u82d4', '\u574d','\u94f4', '\u5932', '\u5fd1', '\u71a5', '\u5254', '\u5929', '\u4f7b', '\u5e16','\u5385', '\u56f2', '\u5077', '\u92c0', '\u6e4d', '\u63a8', '\u541e', '\u6258','\u6316', '\u6b6a', '\u5f2f', '\u5c2a', '\u5371', '\u586d', '\u7fc1', '\u631d','\u5140', '\u5915', '\u867e', '\u4eda', '\u4e61', '\u7071', '\u4e9b', '\u5fc3','\u661f', '\u51f6', '\u4f11', '\u65f4', '\u8f69', '\u75b6', '\u52cb', '\u4e2b','\u6079', '\u592e', '\u5e7a', '\u8036', '\u4e00', '\u6b2d', '\u5e94', '\u54df','\u4f63', '\u4f18', '\u625c', '\u9e22', '\u66f0', '\u6655', '\u531d', '\u707d','\u7ccc', '\u7242', '\u50ae', '\u5219', '\u8d3c', '\u600e', '\u5897', '\u5412','\u635a', '\u6cbe', '\u5f20', '\u948a', '\u8707', '\u8d1e', '\u4e89', '\u4e4b','\u4e2d', '\u5dde', '\u6731', '\u6293', '\u8de9', '\u4e13', '\u5986', '\u96b9','\u5b92', '\u5353', '\u5b5c', '\u5b97', '\u90b9', '\u79df', '\u94bb', '\u539c','\u5c0a', '\u6628', };/*** Pinyin array. Each pinyin is corresponding to unihans of same offset in the unihans array.*/public static final byte[][] PINYINS = {{ 65, 0, 0, 0, 0, 0 }, { 65, 73, 0, 0, 0, 0 }, { 65, 78, 0, 0, 0, 0 },{ 65, 78, 71, 0, 0, 0 }, { 65, 79, 0, 0, 0, 0 }, { 66, 65, 0, 0, 0, 0 },{ 66, 65, 73, 0, 0, 0 }, { 66, 65, 78, 0, 0, 0 }, { 66, 65, 78, 71, 0, 0 },{ 66, 65, 79, 0, 0, 0 }, { 66, 69, 73, 0, 0, 0 }, { 66, 69, 78, 0, 0, 0 },{ 66, 69, 78, 71, 0, 0 }, { 66, 73, 0, 0, 0, 0 }, { 66, 73, 65, 78, 0, 0 },{ 66, 73, 65, 79, 0, 0 }, { 66, 73, 69, 0, 0, 0 }, { 66, 73, 78, 0, 0, 0 },{ 66, 73, 78, 71, 0, 0 }, { 66, 79, 0, 0, 0, 0 }, { 66, 85, 0, 0, 0, 0 },{ 67, 65, 0, 0, 0, 0 }, { 67, 65, 73, 0, 0, 0 },{ 67, 65, 78, 0, 0, 0 }, { 67, 65, 78, 71, 0, 0 }, { 67, 65, 79, 0, 0, 0 },{ 67, 69, 0, 0, 0, 0 }, { 67, 69, 78, 0, 0, 0 }, { 67, 69, 78, 71, 0, 0 },{ 67, 72, 65, 0, 0, 0 }, { 67, 72, 65, 73, 0, 0 }, { 67, 72, 65, 78, 0, 0 },{ 67, 72, 65, 78, 71, 0 }, { 67, 72, 65, 79, 0, 0 }, { 67, 72, 69, 0, 0, 0 },{ 67, 72, 69, 78, 0, 0 }, { 67, 72, 69, 78, 71, 0 }, { 67, 72, 73, 0, 0, 0 },{ 67, 72, 79, 78, 71, 0 }, { 67, 72, 79, 85, 0, 0 }, { 67, 72, 85, 0, 0, 0 },{ 67, 72, 85, 65, 0, 0 }, { 67, 72, 85, 65, 73, 0 }, { 67, 72, 85, 65, 78, 0 },{ 67, 72, 85, 65, 78, 71 }, { 67, 72, 85, 73, 0, 0 }, { 67, 72, 85, 78, 0, 0 },{ 67, 72, 85, 79, 0, 0 }, { 67, 73, 0, 0, 0, 0 }, { 67, 79, 78, 71, 0, 0 },{ 67, 79, 85, 0, 0, 0 }, { 67, 85, 0, 0, 0, 0 }, { 67, 85, 65, 78, 0, 0 },{ 67, 85, 73, 0, 0, 0 }, { 67, 85, 78, 0, 0, 0 }, { 67, 85, 79, 0, 0, 0 },{ 68, 65, 0, 0, 0, 0 }, { 68, 65, 73, 0, 0, 0 }, { 68, 65, 78, 0, 0, 0 },{ 68, 65, 78, 71, 0, 0 }, { 68, 65, 79, 0, 0, 0 }, { 68, 69, 0, 0, 0, 0 },{ 68, 69, 73, 0, 0, 0 }, { 68, 69, 78, 0, 0, 0 }, { 68, 69, 78, 71, 0, 0 },{ 68, 73, 0, 0, 0, 0 }, { 68, 73, 65, 0, 0, 0 }, { 68, 73, 65, 78, 0, 0 },{ 68, 73, 65, 79, 0, 0 }, { 68, 73, 69, 0, 0, 0 }, { 68, 73, 78, 71, 0, 0 },{ 68, 73, 85, 0, 0, 0 }, { 68, 79, 78, 71, 0, 0 }, { 68, 79, 85, 0, 0, 0 },{ 68, 85, 0, 0, 0, 0 }, { 68, 85, 65, 78, 0, 0 }, { 68, 85, 73, 0, 0, 0 },{ 68, 85, 78, 0, 0, 0 }, { 68, 85, 79, 0, 0, 0 }, { 69, 0, 0, 0, 0, 0 },{ 69, 73, 0, 0, 0, 0 }, { 69, 78, 0, 0, 0, 0 }, { 69, 78, 71, 0, 0, 0 },{ 69, 82, 0, 0, 0, 0 }, { 70, 65, 0, 0, 0, 0 }, { 70, 65, 78, 0, 0, 0 },{ 70, 65, 78, 71, 0, 0 }, { 70, 69, 73, 0, 0, 0 }, { 70, 69, 78, 0, 0, 0 },{ 70, 69, 78, 71, 0, 0 }, { 70, 73, 65, 79, 0, 0 }, { 70, 79, 0, 0, 0, 0 },{ 70, 79, 85, 0, 0, 0 }, { 70, 85, 0, 0, 0, 0 }, { 71, 65, 0, 0, 0, 0 },{ 71, 65, 73, 0, 0, 0 }, { 71, 65, 78, 0, 0, 0 }, { 71, 65, 78, 71, 0, 0 },{ 71, 65, 79, 0, 0, 0 }, { 71, 69, 0, 0, 0, 0 }, { 71, 69, 73, 0, 0, 0 },{ 71, 69, 78, 0, 0, 0 }, { 71, 69, 78, 71, 0, 0 }, { 71, 79, 78, 71, 0, 0 },{ 71, 79, 85, 0, 0, 0 }, { 71, 85, 0, 0, 0, 0 }, { 71, 85, 65, 0, 0, 0 },{ 71, 85, 65, 73, 0, 0 }, { 71, 85, 65, 78, 0, 0 }, { 71, 85, 65, 78, 71, 0 },{ 71, 85, 73, 0, 0, 0 }, { 71, 85, 78, 0, 0, 0 }, { 71, 85, 79, 0, 0, 0 },{ 72, 65, 0, 0, 0, 0 }, { 72, 65, 73, 0, 0, 0 }, { 72, 65, 78, 0, 0, 0 },{ 72, 65, 78, 71, 0, 0 }, { 72, 65, 79, 0, 0, 0 }, { 72, 69, 0, 0, 0, 0 },{ 72, 69, 73, 0, 0, 0 }, { 72, 69, 78, 0, 0, 0 }, { 72, 69, 78, 71, 0, 0 },{ 72, 77, 0, 0, 0, 0 }, { 72, 79, 78, 71, 0, 0 }, { 72, 79, 85, 0, 0, 0 },{ 72, 85, 0, 0, 0, 0 }, { 72, 85, 65, 0, 0, 0 }, { 72, 85, 65, 73, 0, 0 },{ 72, 85, 65, 78, 0, 0 }, { 72, 85, 65, 78, 71, 0 }, { 72, 85, 73, 0, 0, 0 },{ 72, 85, 78, 0, 0, 0 }, { 72, 85, 79, 0, 0, 0 }, { 74, 73, 0, 0, 0, 0 },{ 74, 73, 65, 0, 0, 0 }, { 74, 73, 65, 78, 0, 0 }, { 74, 73, 65, 78, 71, 0 },{ 74, 73, 65, 79, 0, 0 }, { 74, 73, 69, 0, 0, 0 }, { 74, 73, 78, 0, 0, 0 },{ 74, 73, 78, 71, 0, 0 }, { 74, 73, 79, 78, 71, 0 }, { 74, 73, 85, 0, 0, 0 },{ 74, 85, 0, 0, 0, 0 }, { 74, 85, 65, 78, 0, 0 }, { 74, 85, 69, 0, 0, 0 },{ 74, 85, 78, 0, 0, 0 }, { 75, 65, 0, 0, 0, 0 }, { 75, 65, 73, 0, 0, 0 },{ 75, 65, 78, 0, 0, 0 }, { 75, 65, 78, 71, 0, 0 }, { 75, 65, 79, 0, 0, 0 },{ 75, 69, 0, 0, 0, 0 }, { 75, 69, 73, 0, 0, 0 }, { 75, 69, 78, 0, 0, 0 },{ 75, 69, 78, 71, 0, 0 }, { 75, 79, 78, 71, 0, 0 }, { 75, 79, 85, 0, 0, 0 },{ 75, 85, 0, 0, 0, 0 }, { 75, 85, 65, 0, 0, 0 }, { 75, 85, 65, 73, 0, 0 },{ 75, 85, 65, 78, 0, 0 }, { 75, 85, 65, 78, 71, 0 }, { 75, 85, 73, 0, 0, 0 },{ 75, 85, 78, 0, 0, 0 }, { 75, 85, 79, 0, 0, 0 }, { 76, 65, 0, 0, 0, 0 },{ 76, 65, 73, 0, 0, 0 }, { 76, 65, 78, 0, 0, 0 }, { 76, 65, 78, 71, 0, 0 },{ 76, 65, 79, 0, 0, 0 }, { 76, 69, 0, 0, 0, 0 }, { 76, 69, 73, 0, 0, 0 },{ 76, 69, 78, 71, 0, 0 }, { 76, 73, 0, 0, 0, 0 }, { 76, 73, 65, 0, 0, 0 },{ 76, 73, 65, 78, 0, 0 }, { 76, 73, 65, 78, 71, 0 }, { 76, 73, 65, 79, 0, 0 },{ 76, 73, 69, 0, 0, 0 }, { 76, 73, 78, 0, 0, 0 }, { 76, 73, 78, 71, 0, 0 },{ 76, 73, 85, 0, 0, 0 }, { 76, 79, 78, 71, 0, 0 }, { 76, 79, 85, 0, 0, 0 },{ 76, 85, 0, 0, 0, 0 }, { 76, 85, 65, 78, 0, 0 }, { 76, 85, 69, 0, 0, 0 },{ 76, 85, 78, 0, 0, 0 }, { 76, 85, 79, 0, 0, 0 }, { 77, 0, 0, 0, 0, 0 },{ 77, 65, 0, 0, 0, 0 }, { 77, 65, 73, 0, 0, 0 }, { 77, 65, 78, 0, 0, 0 },{ 77, 65, 78, 71, 0, 0 }, { 77, 65, 79, 0, 0, 0 }, { 77, 69, 0, 0, 0, 0 },{ 77, 69, 73, 0, 0, 0 }, { 77, 69, 78, 0, 0, 0 }, { 77, 69, 78, 71, 0, 0 },{ 77, 73, 0, 0, 0, 0 }, { 77, 73, 65, 78, 0, 0 }, { 77, 73, 65, 79, 0, 0 },{ 77, 73, 69, 0, 0, 0 }, { 77, 73, 78, 0, 0, 0 }, { 77, 73, 78, 71, 0, 0 },{ 77, 73, 85, 0, 0, 0 }, { 77, 79, 0, 0, 0, 0 }, { 77, 79, 85, 0, 0, 0 },{ 77, 85, 0, 0, 0, 0 }, { 78, 65, 0, 0, 0, 0 }, { 78, 65, 73, 0, 0, 0 },{ 78, 65, 78, 0, 0, 0 }, { 78, 65, 78, 71, 0, 0 }, { 78, 65, 79, 0, 0, 0 },{ 78, 69, 0, 0, 0, 0 }, { 78, 69, 73, 0, 0, 0 }, { 78, 69, 78, 0, 0, 0 },{ 78, 69, 78, 71, 0, 0 }, { 78, 73, 0, 0, 0, 0 }, { 78, 73, 65, 78, 0, 0 },{ 78, 73, 65, 78, 71, 0 }, { 78, 73, 65, 79, 0, 0 }, { 78, 73, 69, 0, 0, 0 },{ 78, 73, 78, 0, 0, 0 }, { 78, 73, 78, 71, 0, 0 }, { 78, 73, 85, 0, 0, 0 },{ 78, 79, 78, 71, 0, 0 }, { 78, 79, 85, 0, 0, 0 }, { 78, 85, 0, 0, 0, 0 },{ 78, 85, 65, 78, 0, 0 }, { 78, 85, 69, 0, 0, 0 }, { 78, 85, 79, 0, 0, 0 },{ 79, 0, 0, 0, 0, 0 }, { 79, 85, 0, 0, 0, 0 }, { 80, 65, 0, 0, 0, 0 },{ 80, 65, 73, 0, 0, 0 }, { 80, 65, 78, 0, 0, 0 }, { 80, 65, 78, 71, 0, 0 },{ 80, 65, 79, 0, 0, 0 }, { 80, 69, 73, 0, 0, 0 }, { 80, 69, 78, 0, 0, 0 },{ 80, 69, 78, 71, 0, 0 }, { 80, 73, 0, 0, 0, 0 }, { 80, 73, 65, 78, 0, 0 },{ 80, 73, 65, 79, 0, 0 }, { 80, 73, 69, 0, 0, 0 }, { 80, 73, 78, 0, 0, 0 },{ 80, 73, 78, 71, 0, 0 }, { 80, 79, 0, 0, 0, 0 }, { 80, 79, 85, 0, 0, 0 },{ 80, 85, 0, 0, 0, 0 }, { 81, 73, 0, 0, 0, 0 }, { 81, 73, 65, 0, 0, 0 },{ 81, 73, 65, 78, 0, 0 }, { 81, 73, 65, 78, 71, 0 }, { 81, 73, 65, 79, 0, 0 },{ 81, 73, 69, 0, 0, 0 }, { 81, 73, 78, 0, 0, 0 }, { 81, 73, 78, 71, 0, 0 },{ 81, 73, 79, 78, 71, 0 }, { 81, 73, 85, 0, 0, 0 }, { 81, 85, 0, 0, 0, 0 },{ 81, 85, 65, 78, 0, 0 }, { 81, 85, 69, 0, 0, 0 }, { 81, 85, 78, 0, 0, 0 },{ 82, 65, 78, 0, 0, 0 }, { 82, 65, 78, 71, 0, 0 }, { 82, 65, 79, 0, 0, 0 },{ 82, 69, 0, 0, 0, 0 }, { 82, 69, 78, 0, 0, 0 }, { 82, 69, 78, 71, 0, 0 },{ 82, 73, 0, 0, 0, 0 }, { 82, 79, 78, 71, 0, 0 }, { 82, 79, 85, 0, 0, 0 },{ 82, 85, 0, 0, 0, 0 }, { 82, 85, 65, 78, 0, 0 }, { 82, 85, 73, 0, 0, 0 },{ 82, 85, 78, 0, 0, 0 }, { 82, 85, 79, 0, 0, 0 }, { 83, 65, 0, 0, 0, 0 },{ 83, 65, 73, 0, 0, 0 }, { 83, 65, 78, 0, 0, 0 }, { 83, 65, 78, 71, 0, 0 },{ 83, 65, 79, 0, 0, 0 }, { 83, 69, 0, 0, 0, 0 }, { 83, 69, 78, 0, 0, 0 },{ 83, 69, 78, 71, 0, 0 }, { 83, 72, 65, 0, 0, 0 }, { 83, 72, 65, 73, 0, 0 },{ 83, 72, 65, 78, 0, 0 }, { 83, 72, 65, 78, 71, 0 }, { 83, 72, 65, 79, 0, 0 },{ 83, 72, 69, 0, 0, 0 }, { 83, 72, 69, 78, 0, 0 }, { 83, 72, 69, 78, 71, 0 },{ 83, 72, 73, 0, 0, 0 }, { 83, 72, 79, 85, 0, 0 }, { 83, 72, 85, 0, 0, 0 },{ 83, 72, 85, 65, 0, 0 }, { 83, 72, 85, 65, 73, 0 }, { 83, 72, 85, 65, 78, 0 },{ 83, 72, 85, 65, 78, 71 }, { 83, 72, 85, 73, 0, 0 }, { 83, 72, 85, 78, 0, 0 },{ 83, 72, 85, 79, 0, 0 }, { 83, 73, 0, 0, 0, 0 }, { 83, 79, 78, 71, 0, 0 },{ 83, 79, 85, 0, 0, 0 }, { 83, 85, 0, 0, 0, 0 }, { 83, 85, 65, 78, 0, 0 },{ 83, 85, 73, 0, 0, 0 }, { 83, 85, 78, 0, 0, 0 }, { 83, 85, 79, 0, 0, 0 },{ 84, 65, 0, 0, 0, 0 }, { 84, 65, 73, 0, 0, 0 }, { 84, 65, 78, 0, 0, 0 },{ 84, 65, 78, 71, 0, 0 }, { 84, 65, 79, 0, 0, 0 }, { 84, 69, 0, 0, 0, 0 },{ 84, 69, 78, 71, 0, 0 }, { 84, 73, 0, 0, 0, 0 }, { 84, 73, 65, 78, 0, 0 },{ 84, 73, 65, 79, 0, 0 }, { 84, 73, 69, 0, 0, 0 }, { 84, 73, 78, 71, 0, 0 },{ 84, 79, 78, 71, 0, 0 }, { 84, 79, 85, 0, 0, 0 }, { 84, 85, 0, 0, 0, 0 },{ 84, 85, 65, 78, 0, 0 }, { 84, 85, 73, 0, 0, 0 }, { 84, 85, 78, 0, 0, 0 },{ 84, 85, 79, 0, 0, 0 }, { 87, 65, 0, 0, 0, 0 }, { 87, 65, 73, 0, 0, 0 },{ 87, 65, 78, 0, 0, 0 }, { 87, 65, 78, 71, 0, 0 }, { 87, 69, 73, 0, 0, 0 },{ 87, 69, 78, 0, 0, 0 }, { 87, 69, 78, 71, 0, 0 }, { 87, 79, 0, 0, 0, 0 },{ 87, 85, 0, 0, 0, 0 }, { 88, 73, 0, 0, 0, 0 }, { 88, 73, 65, 0, 0, 0 },{ 88, 73, 65, 78, 0, 0 }, { 88, 73, 65, 78, 71, 0 }, { 88, 73, 65, 79, 0, 0 },{ 88, 73, 69, 0, 0, 0 }, { 88, 73, 78, 0, 0, 0 }, { 88, 73, 78, 71, 0, 0 },{ 88, 73, 79, 78, 71, 0 }, { 88, 73, 85, 0, 0, 0 }, { 88, 85, 0, 0, 0, 0 },{ 88, 85, 65, 78, 0, 0 }, { 88, 85, 69, 0, 0, 0 }, { 88, 85, 78, 0, 0, 0 },{ 89, 65, 0, 0, 0, 0 }, { 89, 65, 78, 0, 0, 0 }, { 89, 65, 78, 71, 0, 0 },{ 89, 65, 79, 0, 0, 0 }, { 89, 69, 0, 0, 0, 0 }, { 89, 73, 0, 0, 0, 0 },{ 89, 73, 78, 0, 0, 0 }, { 89, 73, 78, 71, 0, 0 }, { 89, 79, 0, 0, 0, 0 },{ 89, 79, 78, 71, 0, 0 }, { 89, 79, 85, 0, 0, 0 }, { 89, 85, 0, 0, 0, 0 },{ 89, 85, 65, 78, 0, 0 }, { 89, 85, 69, 0, 0, 0 }, { 89, 85, 78, 0, 0, 0 },{ 90, 65, 0, 0, 0, 0 }, { 90, 65, 73, 0, 0, 0 }, { 90, 65, 78, 0, 0, 0 },{ 90, 65, 78, 71, 0, 0 }, { 90, 65, 79, 0, 0, 0 }, { 90, 69, 0, 0, 0, 0 },{ 90, 69, 73, 0, 0, 0 }, { 90, 69, 78, 0, 0, 0 }, { 90, 69, 78, 71, 0, 0 },{ 90, 72, 65, 0, 0, 0 }, { 90, 72, 65, 73, 0, 0 }, { 90, 72, 65, 78, 0, 0 },{ 90, 72, 65, 78, 71, 0 }, { 90, 72, 65, 79, 0, 0 }, { 90, 72, 69, 0, 0, 0 },{ 90, 72, 69, 78, 0, 0 }, { 90, 72, 69, 78, 71, 0 }, { 90, 72, 73, 0, 0, 0 },{ 90, 72, 79, 78, 71, 0 }, { 90, 72, 79, 85, 0, 0 }, { 90, 72, 85, 0, 0, 0 },{ 90, 72, 85, 65, 0, 0 }, { 90, 72, 85, 65, 73, 0 }, { 90, 72, 85, 65, 78, 0 },{ 90, 72, 85, 65, 78, 71 }, { 90, 72, 85, 73, 0, 0 }, { 90, 72, 85, 78, 0, 0 },{ 90, 72, 85, 79, 0, 0 }, { 90, 73, 0, 0, 0, 0 }, { 90, 79, 78, 71, 0, 0 },{ 90, 79, 85, 0, 0, 0 }, { 90, 85, 0, 0, 0, 0 }, { 90, 85, 65, 78, 0, 0 },{ 90, 85, 73, 0, 0, 0 }, { 90, 85, 78, 0, 0, 0 }, { 90, 85, 79, 0, 0, 0 }, };/** First and last Chinese character with known Pinyin according to zh collation */private static final String FIRST_PINYIN_UNIHAN = "\u963F";private static final String LAST_PINYIN_UNIHAN = "\u84D9";/** The first Chinese character in Unicode block */private static final char FIRST_UNIHAN = '\u3400';private static final Collator COLLATOR = Collator.getInstance(Locale.CHINA);private static HanziToPinyin sInstance;private final boolean mHasChinaCollator;public static class Token {/*** Separator between target string for each source char*/public static final String SEPARATOR = " ";public static final int LATIN = 1;public static final int PINYIN = 2;public static final int UNKNOWN = 3;public Token() {}public Token(int type, String source, String target) {this.type = type;this.source = source;this.target = target;}/*** Type of this token, ASCII, PINYIN or UNKNOWN.*/public int type;/*** Original string before translation.*/public String source;/*** Translated string of source. For Han, target is corresponding Pinyin. Otherwise target is* original string in source.*/public String target;}protected HanziToPinyin(boolean hasChinaCollator) {mHasChinaCollator = hasChinaCollator;}public static HanziToPinyin getInstance() {synchronized (HanziToPinyin.class) {if (sInstance != null) {return sInstance;}// Check if zh_CN collation data is availablesInstance = new HanziToPinyin(true);return sInstance;}}private Token getToken(char character) {Token token = new Token();final String letter = Character.toString(character);token.source = letter;int offset = -1;int cmp;if (character < 256) {token.type = Token.LATIN;token.target = letter;return token;} else if (character < FIRST_UNIHAN) {token.type = Token.UNKNOWN;token.target = letter;return token;} else {cmp = COLLATOR.compare(letter, FIRST_PINYIN_UNIHAN);if (cmp < 0) {token.type = Token.UNKNOWN;token.target = letter;return token;} else if (cmp == 0) {token.type = Token.PINYIN;offset = 0;} else {cmp = COLLATOR.compare(letter, LAST_PINYIN_UNIHAN);if (cmp > 0) {token.type = Token.UNKNOWN;token.target = letter;return token;} else if (cmp == 0) {token.type = Token.PINYIN;offset = UNIHANS.length - 1;}}}token.type = Token.PINYIN;if (offset < 0) {int begin = 0;int end = UNIHANS.length - 1;while (begin <= end) {offset = (begin + end) / 2;final String unihan = Character.toString(UNIHANS[offset]);cmp = COLLATOR.compare(letter, unihan);if (cmp == 0) {break;} else if (cmp > 0) {begin = offset + 1;} else {end = offset - 1;}}}if (cmp < 0) {offset--;}StringBuilder pinyin = new StringBuilder();for (int j = 0; j < PINYINS[offset].length && PINYINS[offset][j] != 0; j++) {pinyin.append((char) PINYINS[offset][j]);}token.target = pinyin.toString();return token;}/*** Convert the input to a array of tokens. The sequence of ASCII or Unknown characters without* space will be put into a Token, One Hanzi character which has pinyin will be treated as a* Token. If these is no China collator, the empty token array is returned.*/public ArrayList<Token> get(final String input) {ArrayList<Token> tokens = new ArrayList<Token>();if (!mHasChinaCollator || TextUtils.isEmpty(input)) {// return empty tokens.return tokens;}final int inputLength = input.length();final StringBuilder sb = new StringBuilder();int tokenType = Token.LATIN;// Go through the input, create a new token when// a. Token type changed// b. Get the Pinyin of current charater.// c. current character is space.for (int i = 0; i < inputLength; i++) {final char character = input.charAt(i);if (character == ' ') {if (sb.length() > 0) {addToken(sb, tokens, tokenType);}} else if (character < 256) {if (tokenType != Token.LATIN && sb.length() > 0) {addToken(sb, tokens, tokenType);}tokenType = Token.LATIN;sb.append(character);} else if (character < FIRST_UNIHAN) {if (tokenType != Token.UNKNOWN && sb.length() > 0) {addToken(sb, tokens, tokenType);}tokenType = Token.UNKNOWN;sb.append(character);} else {Token t = getToken(character);if (t.type == Token.PINYIN) {if (sb.length() > 0) {addToken(sb, tokens, tokenType);}tokens.add(t);tokenType = Token.PINYIN;} else {if (tokenType != t.type && sb.length() > 0) {addToken(sb, tokens, tokenType);}tokenType = t.type;sb.append(character);}}}if (sb.length() > 0) {addToken(sb, tokens, tokenType);}return tokens;}private void addToken(final StringBuilder sb, final ArrayList<Token> tokens, final int tokenType) {String str = sb.toString();tokens.add(new Token(tokenType, str, str));sb.setLength(0);}public String getBlendString(final String input){StringBuffer sb = new StringBuffer();ArrayList<Token>  tokens = get(input);for(Token token : tokens){sb.append(" "+token.target +" " + token.source+" ");sb.append(token.source);}   return sb.toString();}
}

public class PinYin{//汉字返回拼音，字母原样返回，都转换为小写public static String getPinYin(String input) {ArrayList<Token> tokens = HanziToPinyin.getInstance().get(input);StringBuilder sb = new StringBuilder();if (tokens != null && tokens.size() > 0) {for (Token token : tokens) {if (Token.PINYIN == token.type) {sb.append(token.target);} else {sb.append(token.source);}}}return sb.toString().toLowerCase();}
}

1.1程序中把中文转换成拼音

String pinyin=PinYin.getPinYin(name);

把需要转换的中文放到name即可。

2 中文转换成对应的首字母

public class FirstLetter {static final int GB_SP_DIFF = 160;// 存放国标一级汉字不同读音的起始区位码static final int[] secPosValueList = { 1601, 1637, 1833, 2078, 2274, 2302,2433, 2594, 2787, 3106, 3212, 3472, 3635, 3722, 3730, 3858, 4027,4086, 4390, 4558, 4684, 4925, 5249, 5600 };// 存放国标一级汉字不同读音的起始区位码对应读音static final char[] firstLetter = { 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h','j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'w', 'x','y', 'z' };/*** 获取汉字首字母* @param characters* @return 汉字首字母*/public static String getSpells(String characters) {StringBuffer buffer = new StringBuffer();for (int i = 0; i < characters.length(); i++) {char ch = characters.charAt(i);if ((ch >> 7) == 0) {// 判断是否为汉字，如果左移7为为0就不是汉字，否则是汉字} else {char spell = getFirstLetter(ch);buffer.append(String.valueOf(spell));}}return buffer.toString();}// 获取一个汉字的首字母public static Character getFirstLetter(char ch) {byte[] uniCode = null;try {uniCode = String.valueOf(ch).getBytes("GBK");} catch (UnsupportedEncodingException e) {e.printStackTrace();return null;}if (uniCode[0] < 128 && uniCode[0] > 0) { // 非汉字return null;} else {return convert(uniCode);}}/*** 获取一个汉字的拼音首字母。 GB码两个字节分别减去160，转换成10进制码组合就可以得到区位码* 例如汉字“你”的GB码是0xC4/0xE3，分别减去0xA0（160）就是0x24/0x43* 0x24转成10进制就是36，0x43是67，那么它的区位码就是3667，在对照表中读音为‘n’*/static char convert(byte[] bytes) {char result = '-';int secPosValue = 0;int i;for (i = 0; i < bytes.length; i++) {bytes[i] -= GB_SP_DIFF;}secPosValue = bytes[0] * 100 + bytes[1];for (i = 0; i < 23; i++) {if (secPosValue >= secPosValueList[i]&& secPosValue < secPosValueList[i + 1]) {result = firstLetter[i];break;}}return result;}}

2.1程序中把中文转换成对应的首字母

String first=FirstLetter.getSpells(name);

把需要转换的中文放到name的位置就可以了

3AutoCompleteTextView的Adapter

public class AutoAdapter extends BaseAdapter implements Filterable{private List<Book> books;private Context context;private ArrayFilter mArrayFilter;private ArrayList<Book> mFilterBooks;public AutoAdapter(List<Book> books,Context context){this.context=context;if(books==null){this.books=new ArrayList<Book>();}else{this.books=books;}}@Overridepublic int getCount() {return books.size();}@Overridepublic Object getItem(int position) {return books.get(position);}@Overridepublic long getItemId(int position) {return position;}@Overridepublic View getView(int position, View convertView, ViewGroup parent) {ViewHolder viewHolder;if (convertView == null) {viewHolder = new ViewHolder();
//          convertView = LayoutInflater.from(context).inflate(
//                  R.layout.act_item, null);convertView = LayoutInflater.from(context).inflate(R.layout.act_item, null);viewHolder.id = (TextView) convertView.findViewById(R.id.id_book);viewHolder.name = (TextView) convertView.findViewById(R.id.name_book);viewHolder.author = (TextView) convertView.findViewById(R.id.author_book);viewHolder.price = (TextView) convertView.findViewById(R.id.price_book);convertView.setTag(viewHolder);} else {viewHolder = (ViewHolder) convertView.getTag();}Book book = books.get(position);viewHolder.id.setText(book.getId() + "");viewHolder.name.setText(book.getName());viewHolder.author.setText(book.getAuthor());viewHolder.price.setText(book.getPrice()+"");return convertView;}class ViewHolder {TextView id, name, author, price;}@Overridepublic Filter getFilter() {if(mArrayFilter==null){mArrayFilter = new ArrayFilter();}return mArrayFilter;}private class ArrayFilter extends Filter {@Overrideprotected FilterResults performFiltering(CharSequence constraint) {FilterResults results = new FilterResults();if (mFilterBooks == null) {mFilterBooks = new ArrayList<Book>(books);}//如果没有过滤条件则不过滤if (constraint == null || constraint.length() == 0) {results.values = mFilterBooks;results.count = mFilterBooks.size();} else {List<Book> retList = new ArrayList<Book>();//过滤条件String str = constraint.toString().toLowerCase();//循环变量数据源，如果有属性满足过滤条件，则添加到result中for (Book book : mFilterBooks) {if (book.getAuthor().contains(str)|| book.getName().contains(str)|| (book.getId() + "").contains(str)|| (book.getPrice() + "").contains(str)||book.getPinyin(book.name).startsWith(str)||FirstLetter.getSpells(book.name).startsWith(str)) {retList.add(book);}}results.values = retList;results.count = retList.size();}return results;}//在这里返回过滤结果@Overrideprotected void publishResults(CharSequence constraint,FilterResults results) {
//          notifyDataSetInvalidated()，会重绘控件（还原到初始状态）
//          notifyDataSetChanged()，重绘当前可见区域books = (List<Book>) results.values;if(results.count>0){notifyDataSetChanged();}else{notifyDataSetInvalidated();}}}
}

3.1Adapter使用的item的布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="horizontal" ><TextView
        android:id="@+id/id_book"android:layout_width="0dp"android:layout_height="48dp"android:layout_weight="1"android:gravity="center"android:text="id" /><TextView
        android:id="@+id/name_book"android:layout_width="0dp"android:layout_height="48dp"android:layout_weight="1"android:gravity="center"android:text="name" /><TextView
        android:id="@+id/author_book"android:layout_width="0dp"android:layout_height="48dp"android:layout_weight="1"android:gravity="center"android:text="author" /><TextView
        android:id="@+id/price_book"android:layout_width="0dp"android:layout_height="48dp"android:layout_weight="1"android:gravity="center"android:text="price" /></LinearLayout>

4.AutoCompleteTextView下拉菜单实体类

public class Book {public String name;public String author;public int id;public double price;public Book(int i, String string, String string2, int j) {// TODO Auto-generated constructor stubthis.id=i;this.name=string;this.author=string2;this.price=j;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getAuthor() {return author;}public void setAuthor(String author) {this.author = author;}public int getId() {return id;}public void setId(int id) {this.id = id;}public double getPrice() {return price;}public void setPrice(double price) {this.price = price;}public String getPinyin(String name) {// TODO Auto-generated method stubString pinyin=PinYin.getPinYin(name);Log.d("name",name);Log.d("py",pinyin);return pinyin;}
}

5.主程序代码

public class MainActivity extends Activity {private AutoCompleteTextView auto;
private AutoAdapter adpter;
private List<Book> books;
private Activity ac;
private EditText et;
private TextView tv;
private Button bt;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);ac=this;initData();auto=(AutoCompleteTextView) findViewById(R.id.auto);et=(EditText) findViewById(R.id.edittext);tv=(TextView) findViewById(R.id.textview);bt=(Button) findViewById(R.id.button);adpter=new AutoAdapter(books, ac);auto.setAdapter(adpter);
//      至少需要输入一个字才会显示下拉表;默认值为2.auto.setThreshold(1);auto.setOnItemClickListener(new OnItemClickListener() {@Overridepublic void onItemClick(AdapterView<?> parent, View view,int position, long id) {// TODO Auto-generated method stubBook book=(Book)parent.getItemAtPosition(position);auto.setText(book.name);}});bt.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubString s=   FirstLetter.getSpells(et.getText().toString());tv.setText(s);}});}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.getMenuInflater().inflate(R.menu.main, menu);return true;}private void initData() {books=new ArrayList<Book>();Book b1 = new Book(1, "三国演义", "罗贯中", 38);Log.d("book", b1.getName());Book b2 = new Book(2, "红楼梦", "曹雪芹", 25);Book b3 = new Book(3, "西游记", "吴承恩", 43);Book b4 = new Book(4, "水浒传", "施耐庵", 72);Book b5 = new Book(5, "随园诗话", "袁枚", 32);Book b6 = new Book(6, "说文解字", "许慎", 14);Book b7 = new Book(7, "文心雕龙", "刘勰", 18);books.add(b1);books.add(b2);books.add(b3);books.add(b4);books.add(b5);books.add(b6);books.add(b7);}
}

6.主程序布局代码

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent"tools:context=".MainActivity"android:orientation="vertical" >
<AutoCompleteTextView android:id="@+id/auto"android:layout_width="match_parent"android:layout_height="wrap_content"android:padding="5dp"/><EditText android:id="@+id/edittext"android:layout_width="match_parent"android:layout_height="wrap_content"android:hint="输入汉字"/>
<Button android:id="@+id/button"android:layout_width="match_parent"android:layout_height="wrap_content"android:text="获取汉字首字母"/>
<TextView android:id="@+id/textview"android:layout_width="match_parent"android:layout_height="wrap_content"/>
</LinearLayout>

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