出现javax.net.ssl.SSLException: Not trusted server certificate错误

WARN/CheckinService(1214): SSL error, attempting to fetch the time: javax.net.ssl.SSLException: Not trusted server certificate
01-01 08:33:13.139: WARN/System.err(1682): java.io.FileNotFoundException: /sdcard/temp/xml/todayspecial.xml
01-01 08:33:13.149: WARN/System.err(1682):     at org.apache.harmony.luni.platform.OSFileSystem.open(OSFileSystem.java:231)
01-01 08:33:13.149: WARN/System.err(1682):     at java.io.FileInputStream.<init>(FileInputStream.java:80)
01-01 08:33:13.149: WARN/System.err(1682):     at javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:138)
遇到此问题通过加入sd卡的写入权限可以解决：

    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />