比较版本号

 1 // 比较版本号 
 2     public static int compareVersion(String newVersion, String currentVersion) {
 3         if (TextUtils.isEmpty(newVersion)) {
 4             if (TextUtils.isEmpty(currentVersion)) {
 5                 return 0;
 6             } else {
 7                 return -1;
 8             }
 9         } else if (TextUtils.isEmpty(currentVersion)) {
10             return 1;
11         }
12 
13         String[] first = newVersion.split("\\.");
14         String[] second = currentVersion.split("\\.");
15         Log.d(TAG, "first: " + Arrays.asList(first) + ", second: " + Arrays.asList(second));
16 
17         int count = Math.min(first.length, second.length);
18         for (int i = 0; i < count; i++) {
19             try {
20                 int firstVersionNumber = Integer.parseInt(first[i]);
21                 int secondVersionNumber = Integer.parseInt(second[i]);
22 
23                 if (firstVersionNumber < secondVersionNumber) {
24                     return -1;
25                 } else if (firstVersionNumber > secondVersionNumber) {
26                     return 1;
27                 }
28 
29             } catch (Exception ignored) {
30             }
31         }
32 
33         if (first.length < second.length) {
34             return -1;
35         } else if (first.length > second.length) {
36             return 1;
37         }
38 
39         return 0;
40     }