diff --git a/.gradle/2.10/taskArtifacts/cache.properties b/.gradle/2.10/taskArtifacts/cache.properties
deleted file mode 100644
index 51dbbef0..00000000
--- a/.gradle/2.10/taskArtifacts/cache.properties
+++ /dev/null
@@ -1 +0,0 @@
-#Thu Jun 02 19:55:15 CST 2016
diff --git a/.gradle/2.10/taskArtifacts/cache.properties.lock b/.gradle/2.10/taskArtifacts/cache.properties.lock
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index 22e4a8c1..00000000
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deleted file mode 100644
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deleted file mode 100644
index 5013ee88..00000000
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diff --git a/.gradle/2.10/tasks/_app_compileDebugUnitTestJavaWithJavac/localJarClasspathSnapshot/localJarClasspathSnapshot.lock b/.gradle/2.10/tasks/_app_compileDebugUnitTestJavaWithJavac/localJarClasspathSnapshot/localJarClasspathSnapshot.lock
deleted file mode 100644
index 3a7943fa..00000000
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diff --git a/.idea/codeStyleSettings.xml b/.idea/codeStyleSettings.xml
deleted file mode 100644
index 99c95a3d..00000000
--- a/.idea/codeStyleSettings.xml
+++ /dev/null
@@ -1,231 +0,0 @@
-<?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/gradle.xml b/.idea/gradle.xml
index 31f85ff1..ded83e3e 100644
--- a/.idea/gradle.xml
+++ b/.idea/gradle.xml
@@ -3,8 +3,9 @@
   <component name="GradleSettings">
     <option name="linkedExternalProjectsSettings">
       <GradleProjectSettings>
-        <option name="distributionType" value="DEFAULT_WRAPPED" />
+        <option name="distributionType" value="LOCAL" />
         <option name="externalProjectPath" value="$PROJECT_DIR$" />
+        <option name="gradleHome" value="D:\Android Studio\gradle\gradle-2.14.1" />
         <option name="modules">
           <set>
             <option value="$PROJECT_DIR$" />
diff --git a/app/src/main/java/com/arialyy/simple/activity/MainActivity.java b/app/src/main/java/com/arialyy/simple/activity/MainActivity.java
index 728b6215..bf720355 100644
--- a/app/src/main/java/com/arialyy/simple/activity/MainActivity.java
+++ b/app/src/main/java/com/arialyy/simple/activity/MainActivity.java
@@ -1,10 +1,15 @@
 package com.arialyy.simple.activity;
 
+import android.Manifest;
 import android.content.Intent;
 import android.os.Bundle;
 import android.support.v7.widget.Toolbar;
 import android.view.View;
+import android.widget.Button;
 import butterknife.Bind;
+import com.arialyy.frame.permission.OnPermissionCallback;
+import com.arialyy.frame.permission.PermissionManager;
+import com.arialyy.frame.util.show.T;
 import com.arialyy.simple.R;
 import com.arialyy.simple.base.BaseActivity;
 import com.arialyy.simple.databinding.ActivityMainBinding;
@@ -14,6 +19,8 @@ import com.arialyy.simple.databinding.ActivityMainBinding;
  */
 public class MainActivity extends BaseActivity<ActivityMainBinding> {
   @Bind(R.id.toolbar) Toolbar mBar;
+  @Bind(R.id.single_task) Button mSigleBt;
+  @Bind(R.id.multi_task) Button mMultiBt;
 
   @Override protected int setLayoutId() {
     return R.layout.activity_main;
@@ -23,6 +30,28 @@ public class MainActivity extends BaseActivity<ActivityMainBinding> {
     super.init(savedInstanceState);
     setSupportActionBar(mBar);
     mBar.setTitle("多线程多任务下载");
+    boolean hasPermission = PermissionManager.getInstance()
+        .checkPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE);
+    if (hasPermission) {
+      setEnable(true);
+    } else {
+      setEnable(false);
+      PermissionManager.getInstance().requestPermission(this, new OnPermissionCallback() {
+        @Override public void onSuccess(String... permissions) {
+          setEnable(true);
+        }
+
+        @Override public void onFail(String... permissions) {
+          T.showShort(MainActivity.this, "没有文件读写权限");
+          setEnable(false);
+        }
+      }, Manifest.permission.WRITE_EXTERNAL_STORAGE);
+    }
+  }
+
+  private void setEnable(boolean enable) {
+    mSigleBt.setEnabled(enable);
+    mMultiBt.setEnabled(enable);
   }
 
   public void onClick(View view) {
diff --git a/app/src/main/java/com/arialyy/simple/activity/MultiTaskActivity.java b/app/src/main/java/com/arialyy/simple/activity/MultiTaskActivity.java
index 9773036f..883695ca 100644
--- a/app/src/main/java/com/arialyy/simple/activity/MultiTaskActivity.java
+++ b/app/src/main/java/com/arialyy/simple/activity/MultiTaskActivity.java
@@ -90,7 +90,7 @@ public class MultiTaskActivity extends BaseActivity<ActivityMultiBinding> {
   };
 
   public void onClick(View view){
-    DownloadNumDialog dialog = new DownloadNumDialog();
+    DownloadNumDialog dialog = new DownloadNumDialog(this);
     dialog.show(getSupportFragmentManager(), "download_num");
   }
 
diff --git a/app/src/main/java/com/arialyy/simple/base/BaseDialog.java b/app/src/main/java/com/arialyy/simple/base/BaseDialog.java
index 9911d2fe..a682aa55 100644
--- a/app/src/main/java/com/arialyy/simple/base/BaseDialog.java
+++ b/app/src/main/java/com/arialyy/simple/base/BaseDialog.java
@@ -8,6 +8,11 @@ import com.arialyy.frame.core.AbsDialogFragment;
  * Created by “AriaLyy@outlook.com” on 2016/11/14.
  */
 public abstract class BaseDialog<VB extends ViewDataBinding> extends AbsDialogFragment<VB>{
+
+  protected BaseDialog(Object obj){
+    super(obj);
+  }
+
   @Override protected void init(Bundle savedInstanceState) {
 
   }
diff --git a/app/src/main/java/com/arialyy/simple/dialog/DownloadNumDialog.java b/app/src/main/java/com/arialyy/simple/dialog/DownloadNumDialog.java
index 90933a7c..4d39c6fd 100644
--- a/app/src/main/java/com/arialyy/simple/dialog/DownloadNumDialog.java
+++ b/app/src/main/java/com/arialyy/simple/dialog/DownloadNumDialog.java
@@ -1,5 +1,6 @@
 package com.arialyy.simple.dialog;
 
+import android.annotation.SuppressLint;
 import android.os.Bundle;
 import android.view.View;
 import android.widget.Button;
@@ -14,11 +15,16 @@ import com.arialyy.simple.databinding.DialogDownloadNumBinding;
  * Created by “AriaLyy@outlook.com” on 2016/11/14.
  * 设置下载数量对话框
  */
-public class DownloadNumDialog extends BaseDialog<DialogDownloadNumBinding> implements RadioGroup.OnCheckedChangeListener{
+@SuppressLint("ValidFragment") public class DownloadNumDialog
+    extends BaseDialog<DialogDownloadNumBinding> implements RadioGroup.OnCheckedChangeListener {
   public static final int RESULT_CODE = 1001;
   @Bind(R.id.cancel) Button mCancel;
   @Bind(R.id.rg) RadioGroup mRg;
 
+  public DownloadNumDialog(Object obj) {
+    super(obj);
+  }
+
   @Override protected int setLayoutId() {
     return R.layout.dialog_download_num;
   }
@@ -41,6 +47,7 @@ public class DownloadNumDialog extends BaseDialog<DialogDownloadNumBinding> impl
     RadioButton rb = (RadioButton) group.getChildAt(checkedId);
     if (rb.isChecked()) {
       getSimplerModule().onDialog(RESULT_CODE, rb.getTag());
+      dismiss();
     }
   }
 }
diff --git a/app/src/main/res/layout/dialog_download_num.xml b/app/src/main/res/layout/dialog_download_num.xml
index 65e6464f..3aa1090b 100644
--- a/app/src/main/res/layout/dialog_download_num.xml
+++ b/app/src/main/res/layout/dialog_download_num.xml
@@ -1,83 +1,83 @@
 <?xml version="1.0" encoding="utf-8"?>
-<layout xmlns:android="http://schemas.android.com/apk/res/android"
-    android:orientation="vertical"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent">
+<layout xmlns:android="http://schemas.android.com/apk/res/android">
 
   <LinearLayout
+      android:minWidth="300dp"
       android:layout_width="match_parent"
       android:layout_height="wrap_content"
       android:orientation="vertical"
       >
 
     <TextView
-        android:textColor="@color/colorPrimary"
-        android:textSize="16sp"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
         android:layout_gravity="center_horizontal"
         android:padding="10dp"
         android:text="设置下载数"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
+        android:textColor="@color/colorPrimary"
+        android:textSize="16sp"
         />
 
     <View
-        android:background="@color/black"
         android:layout_width="match_parent"
-        android:layout_height="1dp"/>
+        android:layout_height="1dp"
+        android:background="@color/black"
+        />
 
     <RadioGroup
         android:id="@+id/rg"
-        android:padding="16dp"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:orientation="vertical"
+        android:padding="16dp"
         >
 
       <RadioButton
-          android:tag="2"
-          android:text="下载线程数：2"
           android:layout_width="match_parent"
           android:layout_height="wrap_content"
+          android:layout_gravity="start"
           android:layoutDirection="rtl"
+          android:tag="2"
+          android:text="下载线程数：2"
           android:textAlignment="textStart"
-          android:layout_gravity="start"
           />
 
       <RadioButton
-          android:tag="3"
-          android:text="下载线程数：3"
           android:layout_width="match_parent"
           android:layout_height="wrap_content"
+          android:layout_gravity="start"
           android:layoutDirection="rtl"
+          android:tag="3"
+          android:text="下载线程数：3"
           android:textAlignment="textStart"
-          android:layout_gravity="start"
           />
 
       <RadioButton
-          android:tag="4"
-          android:text="下载线程数：4"
           android:layout_width="match_parent"
           android:layout_height="wrap_content"
+          android:layout_gravity="start"
           android:layoutDirection="rtl"
+          android:tag="4"
+          android:text="下载线程数：4"
           android:textAlignment="textStart"
-          android:layout_gravity="start"
           />
 
     </RadioGroup>
 
 
     <View
-        android:background="@color/black"
         android:layout_width="match_parent"
-        android:layout_height="1dp"/>
+        android:layout_height="1dp"
+        android:background="@color/black"
+        />
 
 
     <Button
         android:id="@+id/cancel"
-        android:text="取消"
-        style="?buttonBarButtonStyle"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
+        android:text="取消"
+        style="?buttonBarButtonStyle"
         />
 
   </LinearLayout>
diff --git a/downloadutil/build.gradle b/downloadutil/build.gradle
index f6fe271a..16e8602d 100644
--- a/downloadutil/build.gradle
+++ b/downloadutil/build.gradle
@@ -23,4 +23,4 @@ dependencies {
   compile 'com.android.support:appcompat-v7:23.1.1'
 }
 
-apply from: 'jcenter.gradle'
\ No newline at end of file
+//apply from: 'jcenter.gradle'
\ No newline at end of file