使用Java代码来比较Android客户端版本号

 public static int compareVersion(String version1, String version2) {    if (version1.equals(version2)) {      return 0;    }    String[] version1Array = version1.split("//.");    String[] version2Array = version2.split("//.");    int index = 0;    int minLen = Math.min(version1Array.length, version2Array.length);    int diff = 0;    while (index < minLen && (diff = Integer.parseInt(version1Array[index]) - Integer.parseInt(version2Array[index])) == 0) {      index ++;    }    if (diff == 0) {      for (int i = index; i < version1Array.length; i ++) {        if (Integer.parseInt(version1Array[i]) > 0) {          return 1;        }      }      for (int i = index; i < version2Array.length; i ++) {        if (Integer.parseInt(version2Array[i]) > 0) {          return -1;        }      }      return 0;    } else {      return diff > 0 ? 1 : -1;    }  }