diff --git a/.idea/codeStyleSettings.xml b/.idea/codeStyleSettings.xml
new file mode 100644
index 00000000..99c95a3d
--- /dev/null
+++ b/.idea/codeStyleSettings.xml
@@ -0,0 +1,231 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectCodeStyleSettingsManager">
+    <option name="PER_PROJECT_SETTINGS">
+      <value>
+        <option name="CLASS_COUNT_TO_USE_IMPORT_ON_DEMAND" value="99" />
+        <option name="NAMES_COUNT_TO_USE_IMPORT_ON_DEMAND" value="99" />
+        <option name="PACKAGES_TO_USE_IMPORT_ON_DEMAND">
+          <value />
+        </option>
+        <option name="IMPORT_LAYOUT_TABLE">
+          <value>
+            <package name="android" withSubpackages="true" static="false" />
+            <emptyLine />
+            <package name="com" withSubpackages="true" static="false" />
+            <emptyLine />
+            <package name="junit" withSubpackages="true" static="false" />
+            <emptyLine />
+            <package name="net" withSubpackages="true" static="false" />
+            <emptyLine />
+            <package name="org" withSubpackages="true" static="false" />
+            <emptyLine />
+            <package name="java" withSubpackages="true" static="false" />
+            <emptyLine />
+            <package name="javax" withSubpackages="true" static="false" />
+            <emptyLine />
+            <package name="" withSubpackages="true" static="false" />
+            <emptyLine />
+            <package name="" withSubpackages="true" static="true" />
+            <emptyLine />
+          </value>
+        </option>
+        <option name="RIGHT_MARGIN" value="100" />
+        <AndroidXmlCodeStyleSettings>
+          <option name="USE_CUSTOM_SETTINGS" value="true" />
+        </AndroidXmlCodeStyleSettings>
+        <Objective-C-extensions>
+          <option name="GENERATE_INSTANCE_VARIABLES_FOR_PROPERTIES" value="ASK" />
+          <option name="RELEASE_STYLE" value="IVAR" />
+          <option name="TYPE_QUALIFIERS_PLACEMENT" value="BEFORE" />
+          <file>
+            <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Import" />
+            <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Macro" />
+            <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Typedef" />
+            <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Enum" />
+            <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Constant" />
+            <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Global" />
+            <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Struct" />
+            <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="FunctionPredecl" />
+            <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Function" />
+          </file>
+          <class>
+            <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Property" />
+            <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Synthesize" />
+            <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="InitMethod" />
+            <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="StaticMethod" />
+            <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="InstanceMethod" />
+            <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="DeallocMethod" />
+          </class>
+          <extensions>
+            <pair source="cpp" header="h" />
+            <pair source="c" header="h" />
+          </extensions>
+        </Objective-C-extensions>
+        <XML>
+          <option name="XML_KEEP_LINE_BREAKS" value="false" />
+          <option name="XML_ALIGN_ATTRIBUTES" value="false" />
+          <option name="XML_SPACE_INSIDE_EMPTY_TAG" value="true" />
+        </XML>
+        <codeStyleSettings language="XML">
+          <option name="FORCE_REARRANGE_MODE" value="1" />
+          <indentOptions>
+            <option name="CONTINUATION_INDENT_SIZE" value="4" />
+          </indentOptions>
+          <arrangement>
+            <rules>
+              <section>
+                <rule>
+                  <match>
+                    <AND>
+                      <NAME>xmlns:android</NAME>
+                      <XML_NAMESPACE>^$</XML_NAMESPACE>
+                    </AND>
+                  </match>
+                </rule>
+              </section>
+              <section>
+                <rule>
+                  <match>
+                    <AND>
+                      <NAME>xmlns:.*</NAME>
+                      <XML_NAMESPACE>^$</XML_NAMESPACE>
+                    </AND>
+                  </match>
+                  <order>BY_NAME</order>
+                </rule>
+              </section>
+              <section>
+                <rule>
+                  <match>
+                    <AND>
+                      <NAME>.*:id</NAME>
+                      <XML_NAMESPACE>http://schemas.android.com/apk/res/android</XML_NAMESPACE>
+                    </AND>
+                  </match>
+                </rule>
+              </section>
+              <section>
+                <rule>
+                  <match>
+                    <AND>
+                      <NAME>.*:name</NAME>
+                      <XML_NAMESPACE>http://schemas.android.com/apk/res/android</XML_NAMESPACE>
+                    </AND>
+                  </match>
+                </rule>
+              </section>
+              <section>
+                <rule>
+                  <match>
+                    <AND>
+                      <NAME>name</NAME>
+                      <XML_NAMESPACE>^$</XML_NAMESPACE>
+                    </AND>
+                  </match>
+                </rule>
+              </section>
+              <section>
+                <rule>
+                  <match>
+                    <AND>
+                      <NAME>style</NAME>
+                      <XML_NAMESPACE>^$</XML_NAMESPACE>
+                    </AND>
+                  </match>
+                </rule>
+              </section>
+              <section>
+                <rule>
+                  <match>
+                    <AND>
+                      <NAME>.*</NAME>
+                      <XML_NAMESPACE>^$</XML_NAMESPACE>
+                    </AND>
+                  </match>
+                  <order>BY_NAME</order>
+                </rule>
+              </section>
+              <section>
+                <rule>
+                  <match>
+                    <AND>
+                      <NAME>.*:layout_width</NAME>
+                      <XML_NAMESPACE>http://schemas.android.com/apk/res/android</XML_NAMESPACE>
+                    </AND>
+                  </match>
+                </rule>
+              </section>
+              <section>
+                <rule>
+                  <match>
+                    <AND>
+                      <NAME>.*:layout_height</NAME>
+                      <XML_NAMESPACE>http://schemas.android.com/apk/res/android</XML_NAMESPACE>
+                    </AND>
+                  </match>
+                </rule>
+              </section>
+              <section>
+                <rule>
+                  <match>
+                    <AND>
+                      <NAME>.*:layout_.*</NAME>
+                      <XML_NAMESPACE>http://schemas.android.com/apk/res/android</XML_NAMESPACE>
+                    </AND>
+                  </match>
+                  <order>BY_NAME</order>
+                </rule>
+              </section>
+              <section>
+                <rule>
+                  <match>
+                    <AND>
+                      <NAME>.*:width</NAME>
+                      <XML_NAMESPACE>http://schemas.android.com/apk/res/android</XML_NAMESPACE>
+                    </AND>
+                  </match>
+                  <order>BY_NAME</order>
+                </rule>
+              </section>
+              <section>
+                <rule>
+                  <match>
+                    <AND>
+                      <NAME>.*:height</NAME>
+                      <XML_NAMESPACE>http://schemas.android.com/apk/res/android</XML_NAMESPACE>
+                    </AND>
+                  </match>
+                  <order>BY_NAME</order>
+                </rule>
+              </section>
+              <section>
+                <rule>
+                  <match>
+                    <AND>
+                      <NAME>.*</NAME>
+                      <XML_NAMESPACE>http://schemas.android.com/apk/res/android</XML_NAMESPACE>
+                    </AND>
+                  </match>
+                  <order>BY_NAME</order>
+                </rule>
+              </section>
+              <section>
+                <rule>
+                  <match>
+                    <AND>
+                      <NAME>.*</NAME>
+                      <XML_NAMESPACE>.*</XML_NAMESPACE>
+                    </AND>
+                  </match>
+                  <order>BY_NAME</order>
+                </rule>
+              </section>
+            </rules>
+          </arrangement>
+        </codeStyleSettings>
+      </value>
+    </option>
+    <option name="PREFERRED_PROJECT_CODE_STYLE" value="SquareAndroid" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/dictionaries/AriaL.xml b/.idea/dictionaries/AriaL.xml
new file mode 100644
index 00000000..5ba04945
--- /dev/null
+++ b/.idea/dictionaries/AriaL.xml
@@ -0,0 +1,3 @@
+<component name="ProjectDictionaryState">
+  <dictionary name="AriaL" />
+</component>
\ No newline at end of file
diff --git a/.idea/gradle.xml b/.idea/gradle.xml
index ded83e3e..e12fe0b2 100644
--- a/.idea/gradle.xml
+++ b/.idea/gradle.xml
@@ -5,7 +5,7 @@
       <GradleProjectSettings>
         <option name="distributionType" value="LOCAL" />
         <option name="externalProjectPath" value="$PROJECT_DIR$" />
-        <option name="gradleHome" value="D:\Android Studio\gradle\gradle-2.14.1" />
+        <option name="gradleHome" value="C:\android-studio\gradle\gradle-2.14.1" />
         <option name="modules">
           <set>
             <option value="$PROJECT_DIR$" />
diff --git a/downloadutil/build.gradle b/downloadutil/build.gradle
index 69b014c7..68eb9ad5 100644
--- a/downloadutil/build.gradle
+++ b/downloadutil/build.gradle
@@ -27,7 +27,7 @@ dependencies {
   testCompile 'junit:junit:4.12'
   compile 'com.android.support:appcompat-v7:23.1.1'
 }
-apply from: 'jcenter.gradle'
+//apply from: 'jcenter.gradle'
 
 // build a jar with source files
 //task sourcesJar(type: Jar) {
diff --git a/downloadutil/src/main/java/com/arialyy/downloadutil/core/DownloadManager.java b/downloadutil/src/main/java/com/arialyy/downloadutil/core/DownloadManager.java
index 07f3acd4..2a550423 100644
--- a/downloadutil/src/main/java/com/arialyy/downloadutil/core/DownloadManager.java
+++ b/downloadutil/src/main/java/com/arialyy/downloadutil/core/DownloadManager.java
@@ -157,13 +157,4 @@ public class DownloadManager {
     }
     mCommands.clear();
   }
-
-  /**
-   * 设置下载器
-   *
-   * @param queue {@link ITaskQueue}
-   */
-  public void setDownloadQueue(ITaskQueue queue) {
-    mTaskQueue = queue;
-  }
 }
\ No newline at end of file
diff --git a/downloadutil/src/main/java/com/arialyy/downloadutil/core/queue/DownloadTaskQueue.java b/downloadutil/src/main/java/com/arialyy/downloadutil/core/queue/DownloadTaskQueue.java
index 04e66c8b..9fab5801 100644
--- a/downloadutil/src/main/java/com/arialyy/downloadutil/core/queue/DownloadTaskQueue.java
+++ b/downloadutil/src/main/java/com/arialyy/downloadutil/core/queue/DownloadTaskQueue.java
@@ -111,6 +111,10 @@ public class DownloadTaskQueue implements ITaskQueue {
     }
   }
 
+  @Override public int size() {
+    return mExecutePool.size();
+  }
+
   @Override public void setDownloadNum(int downloadNum) {
     mExecutePool.setDownloadNum(downloadNum);
   }
diff --git a/downloadutil/src/main/java/com/arialyy/downloadutil/core/queue/ITaskQueue.java b/downloadutil/src/main/java/com/arialyy/downloadutil/core/queue/ITaskQueue.java
index 0b832433..327085b7 100644
--- a/downloadutil/src/main/java/com/arialyy/downloadutil/core/queue/ITaskQueue.java
+++ b/downloadutil/src/main/java/com/arialyy/downloadutil/core/queue/ITaskQueue.java
@@ -14,7 +14,6 @@
  * limitations under the License.
  */
 
-
 package com.arialyy.downloadutil.core.queue;
 
 import com.arialyy.downloadutil.core.DownloadEntity;
@@ -27,6 +26,11 @@ import com.arialyy.downloadutil.core.task.Task;
  */
 public interface ITaskQueue extends IDownloader {
 
+  /**
+   * 任务池队列大小
+   */
+  public int size();
+
   /**
    * 设置下载任务数
    *
diff --git a/downloadutil/src/main/java/com/arialyy/downloadutil/core/scheduler/DownloadSchedulers.java b/downloadutil/src/main/java/com/arialyy/downloadutil/core/scheduler/DownloadSchedulers.java
index 9737b495..889c3911 100644
--- a/downloadutil/src/main/java/com/arialyy/downloadutil/core/scheduler/DownloadSchedulers.java
+++ b/downloadutil/src/main/java/com/arialyy/downloadutil/core/scheduler/DownloadSchedulers.java
@@ -20,6 +20,7 @@ package com.arialyy.downloadutil.core.scheduler;
 import android.os.Message;
 import android.util.Log;
 import com.arialyy.downloadutil.core.DownloadEntity;
+import com.arialyy.downloadutil.core.queue.ITaskQueue;
 import com.arialyy.downloadutil.core.task.Task;
 import com.arialyy.downloadutil.core.queue.pool.ExecutePool;
 import com.arialyy.downloadutil.core.queue.DownloadTaskQueue;
@@ -65,10 +66,10 @@ public class DownloadSchedulers implements IDownloadSchedulers {
   /**
    * 下载器任务监听
    */
-  OnTargetListener  mTargetListener;
-  DownloadTaskQueue mQueue;
+  OnTargetListener mTargetListener;
+  ITaskQueue       mQueue;
 
-  public DownloadSchedulers(DownloadTaskQueue downloadTaskQueue) {
+  public DownloadSchedulers(ITaskQueue downloadTaskQueue) {
     mQueue = downloadTaskQueue;
   }
 
@@ -90,7 +91,7 @@ public class DownloadSchedulers implements IDownloadSchedulers {
     switch (msg.what) {
       case STOP:
       case CANCEL:
-        if (mQueue.getExecutePool().size() != ExecutePool.mSize) {
+        if (mQueue.size() != ExecutePool.mSize) {
           startNextTask(entity);
         }
         break;