直接上干货，不多说

TelephonyManager manager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);

String[] phone = manager.getLine1Number().split("");

StringBuilder sb =new StringBuilder();

if (phone.length >0) {

   for (int i =0; i < phone.length; i++) {

         if (i <=6) {

             sb.append(phone[i]);

        }else if (i <=11) {

             sb.append("*");

        }else {

              sb.append(phone[i]);

        }

}

Log.d("Tag",sb.toString());

}

注意：获取手机号需要权限申请READ_SMS、READ_PHONE_NUMBERS、READ_PHONE_STATE。