修复android 5.0 StackOverflow

Author: wyouflf

library/src/com/lidroid/xutils/cache/KeyExpiryMap.java

@@ -67,13 +67,11 @@ public synchronized Long put(K key, Long expiryTimestamp) {
     @Override
     public synchronized boolean containsKey(Object key) {
         boolean result = false;
-        if (super.containsKey(key)) {
-            Long expiryTimestamp = super.get(key);
-            if (expiryTimestamp != null && System.currentTimeMillis() < expiryTimestamp) {
-                result = true;
-            } else {
-                this.remove(key);
-            }
+        Long expiryTimestamp = super.get(key);
+        if (expiryTimestamp != null && System.currentTimeMillis() < expiryTimestamp) {
+            result = true;
+        } else {
+            this.remove(key);
         }
         return result;
     }