update DoubleKeyValueMap

Author: wyouflf

library/src/com/lidroid/xutils/util/core/DoubleKeyValueMap.java

@@ -47,15 +47,15 @@ public Set<K1> getFirstKeys() {
         return k1_k2V_map.keySet();
     }
 
+    public ConcurrentHashMap<K2, V> get(K1 key1) {
+        return k1_k2V_map.get(key1);
+    }
+
     public V get(K1 key1, K2 key2) {
         ConcurrentHashMap<K2, V> k2_v = k1_k2V_map.get(key1);
         return k2_v == null ? null : k2_v.get(key2);
     }
 
-    public ConcurrentHashMap<K2, V> get(K1 key1) {
-        return k1_k2V_map.get(key1);
-    }
-
     public boolean containsKey(K1 key1, K2 key2) {
         if (k1_k2V_map.containsKey(key1)) {
             return k1_k2V_map.get(key1).containsKey(key2);
@@ -67,6 +67,16 @@ public boolean containsKey(K1 key1) {
         return k1_k2V_map.containsKey(key1);
     }
 
+    public int size() {
+        if (k1_k2V_map.size() == 0) return 0;
+
+        int result = 0;
+        for (ConcurrentHashMap<K2, V> k2V_map : k1_k2V_map.values()) {
+            result += k2V_map.size();
+        }
+        return result;
+    }
+
     public void clear() {
         if (k1_k2V_map.size() > 0) {
             for (ConcurrentHashMap<K2, V> k2V_map : k1_k2V_map.values()) {