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| -rw-r--r-- | src/main/java/de/pixart/messenger/ui/UpdaterActivity.java | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/src/main/java/de/pixart/messenger/ui/UpdaterActivity.java b/src/main/java/de/pixart/messenger/ui/UpdaterActivity.java index 548313c6c..b24958a43 100644 --- a/src/main/java/de/pixart/messenger/ui/UpdaterActivity.java +++ b/src/main/java/de/pixart/messenger/ui/UpdaterActivity.java @@ -162,6 +162,18 @@ public class UpdaterActivity extends Activity { alert.show(); } + /** + * Use this instead of String.compareTo() for a non-lexicographical + * comparison that works for version strings. e.g. "1.10".compareTo("1.6"). + * + * @note It does not work if "1.10" is supposed to be equal to "1.10.0". + * + * @param str1 a string of ordinal numbers separated by decimal points. + * @param str2 a string of ordinal numbers separated by decimal points. + * @return The result is a negative integer if str1 is _numerically_ less than str2. + * The result is a positive integer if str1 is _numerically_ greater than str2. + * The result is zero if the strings are _numerically_ equal. + */ private int checkVersion(String remoteVersion, String installedVersion) { String[] remote = null; String[] installed = null; |