Android程序开发之获取汉字的首字母

<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"android:orientation="vertical"tools:context=".MainActivity" ><EditTextandroid:id="@+id/edit"android:layout_width="fill_parent"android:layout_height="wrap_content"android:hint="输入汉字" ></EditText><Buttonandroid:id="@+id/button"android:layout_width="fill_parent"android:layout_height="wrap_content"android:text="button" ></Button><TextViewandroid:id="@+id/textView"android:layout_width="fill_parent"android:layout_height="wrap_content" ></TextView></LinearLayout> public class MainActivity extends Activity {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' };private EditText edit;private TextView text;private Button button;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);edit = (EditText) this.findViewById(R.id.edit);text = (TextView) this.findViewById(R.id.textView);button = (Button) this.findViewById(R.id.button);button.setOnClickListener(buttonListener);text.setText("拼音");}private View.OnClickListener buttonListener = new View.OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubif (v == button) {String characters = edit.getText().toString();String spells = getSpells(characters);text.setText(spells);}}};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;}}