json 转换，手机获取验证码

@Override
public void onClick(View v) {
String phone = metPhoneNum.getText().toString();
   String json = "{version:1,body:{mobile:"+phone+"}}";
try {
PostExample.post(Config.USER_REGISTER_URL, json);
} catch (IOException e) {
e.printStackTrace();
Logs.e(e);
}

}