diff --git a/Aria/src/main/java/com/arialyy/aria/core/download/DownloadTarget.java b/Aria/src/main/java/com/arialyy/aria/core/download/DownloadTarget.java
index 1c527810..c8423d3e 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/download/DownloadTarget.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/download/DownloadTarget.java
@@ -56,16 +56,22 @@ public class DownloadTarget
   }
 
   private void initTask(DownloadEntity entity) {
-    mTaskEntity = DbEntity.findFirst(DownloadTaskEntity.class, "key=? and isGroupTask='false'",
-        entity.getDownloadPath());
+    mTaskEntity =
+        DbEntity.findFirst(DownloadTaskEntity.class, "key=? and isGroupTask='false' and url=?",
+            entity.getDownloadPath(), entity.getUrl());
     if (mTaskEntity == null) {
       mTaskEntity = new DownloadTaskEntity();
+      mTaskEntity.url = entity.getUrl();
       mTaskEntity.key = entity.getDownloadPath();
       mTaskEntity.entity = entity;
       mTaskEntity.save();
-    }
-    if (mTaskEntity.entity == null || TextUtils.isEmpty(mTaskEntity.entity.getUrl())) {
+    } else if (mTaskEntity.entity == null || TextUtils.isEmpty(mTaskEntity.entity.getUrl())) {
+      mTaskEntity.entity = entity;
+      mTaskEntity.save();
+    } else if (!mTaskEntity.entity.getUrl().equals(entity.getUrl())) {  //处理地址切换而保存路径不变
+      mTaskEntity.entity.deleteData();
       mTaskEntity.entity = entity;
+      entity.save();
       mTaskEntity.save();
     }
 
diff --git a/Aria/src/main/java/com/arialyy/aria/core/download/DownloadTaskEntity.java b/Aria/src/main/java/com/arialyy/aria/core/download/DownloadTaskEntity.java
index d947d2e4..51f5f9ad 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/download/DownloadTaskEntity.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/download/DownloadTaskEntity.java
@@ -27,6 +27,11 @@ public class DownloadTaskEntity extends AbsTaskEntity<DownloadEntity> {
 
   @OneToOne(table = DownloadEntity.class, key = "downloadPath") public DownloadEntity entity;
 
+  /**
+   * 任务的url
+   */
+  public String url = "";
+
   /**
    * 所属的任务组组名，如果不属于任务组，则为null
    */
diff --git a/Aria/src/main/java/com/arialyy/aria/orm/DBConfig.java b/Aria/src/main/java/com/arialyy/aria/orm/DBConfig.java
index 1734cccf..9e1dabfc 100644
--- a/Aria/src/main/java/com/arialyy/aria/orm/DBConfig.java
+++ b/Aria/src/main/java/com/arialyy/aria/orm/DBConfig.java
@@ -33,7 +33,7 @@ import java.util.Map;
 class DBConfig {
   static Map<String, Class> mapping = new HashMap<>();
   static String DB_NAME;
-  static int VERSION = 13;
+  static int VERSION = 14;
 
   static {
     if (TextUtils.isEmpty(DB_NAME)) {
diff --git a/app/src/main/java/com/arialyy/simple/download/SingleTaskActivity.java b/app/src/main/java/com/arialyy/simple/download/SingleTaskActivity.java
index c8e2efc9..eaf9285d 100644
--- a/app/src/main/java/com/arialyy/simple/download/SingleTaskActivity.java
+++ b/app/src/main/java/com/arialyy/simple/download/SingleTaskActivity.java
@@ -45,7 +45,6 @@ public class SingleTaskActivity extends BaseActivity<ActivitySingleBinding> {
   private static final String DOWNLOAD_URL =
       //"http://kotlinlang.org/docs/kotlin-docs.pdf";
       //"https://atom-installer.github.com/v1.13.0/AtomSetup.exe?s=1484074138&ext=.exe";
-      //"http://static.gaoshouyou.com/d/22/94/822260b849944492caadd2983f9bb624.apk";
       "http://static.gaoshouyou.com/d/22/94/822260b849944492caadd2983f9bb624.apk";
   //"http://120.25.196.56:8000/filereq?id=15692406294&ipncid=105635&client=android&filename=20170819185541.avi";
   //"http://down2.xiaoshuofuwuqi.com/d/file/filetxt/20170608/14/%BA%DA%CE%D7%CA%A6%E1%C8%C6%F0.txt";
@@ -56,6 +55,7 @@ public class SingleTaskActivity extends BaseActivity<ActivitySingleBinding> {
   //不支持断点的链接
   //"http://ox.konsung.net:5555/ksdc-web/download/downloadFile/?fileName=ksdc_1.0.2.apk&rRange=0-";
   //"http://172.18.104.50:8080/download/_302turn";
+  //"http://gdown.baidu.com/data/wisegame/0904344dee4a2d92/QQ_718.apk";
   @Bind(R.id.start) Button mStart;
   @Bind(R.id.stop) Button mStop;
   @Bind(R.id.cancel) Button mCancel;
@@ -196,7 +196,7 @@ public class SingleTaskActivity extends BaseActivity<ActivitySingleBinding> {
         Aria.download(SingleTaskActivity.this)
             .load(DOWNLOAD_URL, true)
             .addHeader("groupName", "value")
-            .setDownloadPath(Environment.getExternalStorageDirectory().getPath() + "/gggg.apk")
+            .setDownloadPath(Environment.getExternalStorageDirectory().getPath() + "/hhhhhhhh.apk")
             .start();
 
         break;