diff --git a/README-en.md b/README-en.md
index f330c73..e48a9e0 100644
--- a/README-en.md
+++ b/README-en.md
@@ -24,7 +24,7 @@ app project build.gradle
 apply plugin: 'android-apt'
 
 dependencies {
-	compile 'com.github.mzule.activityrouter:activityrouter:1.1.1'
+	compile 'com.github.mzule.activityrouter:activityrouter:1.1.2'
 	apt 'com.github.mzule.activityrouter:compiler:1.1.1'
 }
 ```
diff --git a/README.md b/README.md
index f8ebf0f..8d86c7f 100644
--- a/README.md
+++ b/README.md
@@ -26,7 +26,7 @@ buildscript {
 apply plugin: 'android-apt'
 
 dependencies {
-	compile 'com.github.mzule.activityrouter:activityrouter:1.1.1'
+	compile 'com.github.mzule.activityrouter:activityrouter:1.1.2'
 	apt 'com.github.mzule.activityrouter:compiler:1.1.1'
 }
 
diff --git a/activityrouter/build.gradle b/activityrouter/build.gradle
index 7d74abd..651c267 100644
--- a/activityrouter/build.gradle
+++ b/activityrouter/build.gradle
@@ -17,7 +17,7 @@ ext {
     siteUrl = 'https://github.com/mzule/ActivityRouter/'
     gitUrl = 'https://github.com/mzule/ActivityRouter.git'
 
-    libraryVersion = '1.1.1'
+    libraryVersion = '1.1.2'
 
     developerId = 'mzule'
     developerName = 'Cao Dongping'
@@ -33,7 +33,7 @@ android {
     buildToolsVersion "23.0.2"
 
     defaultConfig {
-        minSdkVersion 11
+        minSdkVersion 7
         targetSdkVersion 23
         versionCode 1
         versionName "1.0"
diff --git a/activityrouter/src/main/java/com/github/mzule/activityrouter/router/Mapping.java b/activityrouter/src/main/java/com/github/mzule/activityrouter/router/Mapping.java
index 556c16a..ff1b1ce 100644
--- a/activityrouter/src/main/java/com/github/mzule/activityrouter/router/Mapping.java
+++ b/activityrouter/src/main/java/com/github/mzule/activityrouter/router/Mapping.java
@@ -83,7 +83,7 @@ public Bundle parseExtras(Uri uri) {
             y = y.next();
         }
         // parameter
-        Set<String> names = uri.getQueryParameterNames();
+        Set<String> names = UriCompact.getQueryParameterNames(uri);
         for (String name : names) {
             String value = uri.getQueryParameter(name);
             put(bundle, name, value);
diff --git a/activityrouter/src/main/java/com/github/mzule/activityrouter/router/UriCompact.java b/activityrouter/src/main/java/com/github/mzule/activityrouter/router/UriCompact.java
new file mode 100644
index 0000000..b5c9bee
--- /dev/null
+++ b/activityrouter/src/main/java/com/github/mzule/activityrouter/router/UriCompact.java
@@ -0,0 +1,46 @@
+package com.github.mzule.activityrouter.router;
+
+import android.net.Uri;
+
+import java.util.Collections;
+import java.util.LinkedHashSet;
+import java.util.Set;
+
+/**
+ * Created by CaoDongping on 6/1/16.
+ */
+public class UriCompact {
+
+    /**
+     * Uri#getQueryParameterNames() 不支持 11 以下版本，这个方法提供兼容.
+     *
+     * @param uri Uri
+     * @return Set
+     */
+    public static Set<String> getQueryParameterNames(Uri uri) {
+        String query = uri.getEncodedQuery();
+        if (query == null) {
+            return Collections.emptySet();
+        }
+
+        Set<String> names = new LinkedHashSet<String>();
+        int start = 0;
+        do {
+            int next = query.indexOf('&', start);
+            int end = (next == -1) ? query.length() : next;
+
+            int separator = query.indexOf('=', start);
+            if (separator > end || separator == -1) {
+                separator = end;
+            }
+
+            String name = query.substring(start, separator);
+            names.add(Uri.decode(name));
+            // Move start to end of name.
+            start = end + 1;
+        } while (start < query.length());
+
+        return Collections.unmodifiableSet(names);
+    }
+
+}