private void checkShowChangelog() { final long lastChecksum = Settings.getLastChangelogChecksum(); final long checksum = TextUtils.checksum( getString(R.string.changelog_master) + getString(R.string.changelog_release)); Settings.setLastChangelogChecksum(checksum); // don't show change log after new install... if (lastChecksum > 0 && lastChecksum != checksum) { AboutActivity.showChangeLog(this); } }