android怎么将汉字转化成url能识别的码

//不多说 java class
class demoUtil{
public static void main(String[] args) {
// TODO Auto-generated method stub
String s = "你好";
try {
byte[] b = s.getBytes();
String str = " ";
for (int i = 0; i < b.length; i++) {
Integer I = new Integer(b[i]);
String strTmp = I.toHexString(b[i]);
if (strTmp.length() > 2)
strTmp = strTmp.substring(strTmp.length() - 2);
str = str + strTmp;
}
// str 为 16 进制的 汉字码
System.out.println(str.toUpperCase());
} catch (Exception e) {
e.printStackTrace();
}
}

}