Java tutorial
//package com.java2s; import android.text.TextUtils; public class Main { public static String ToDBC(String input) { if (TextUtils.isEmpty(input)) { return ""; } char[] c = input.toCharArray(); for (int i = 0; i < c.length; i++) { if (c[i] == 12288) { c[i] = (char) 32; continue; } if (c[i] > 65280 && c[i] < 65375) c[i] = (char) (c[i] - 65248); } return new String(c); } }