bug fix ,修复多监听器导致的异常问题，修复性能问题

app/src/main/java/com/arialyy/simple/activity/SingleTaskActivity.java

@@ -37,6 +37,7 @@ import com.arialyy.downloadutil.util.CommonUtil;
 import com.arialyy.simple.R;
 import com.arialyy.simple.base.BaseActivity;
 import com.arialyy.simple.databinding.ActivitySingleBinding;
+import com.arialyy.simple.widget.HorizontalProgressBarWithNumber;
 
 public class SingleTaskActivity extends BaseActivity<ActivitySingleBinding> {
   public static final  int    DOWNLOAD_PRE      = 0x01;
@@ -48,12 +49,13 @@ public class SingleTaskActivity extends BaseActivity<ActivitySingleBinding> {
   public static final  int    DOWNLOAD_RUNNING  = 0x07;
   private static final String DOWNLOAD_URL      =
       "http://static.gaoshouyou.com/d/3a/93/573ae1db9493a801c24bf66128b11e39.apk";
-  @Bind(R.id.progressBar) ProgressBar mPb;
+  @Bind(R.id.progressBar) HorizontalProgressBarWithNumber mPb;
   @Bind(R.id.start)       Button                          mStart;
   @Bind(R.id.stop)        Button                          mStop;
   @Bind(R.id.cancel)      Button                          mCancel;
   @Bind(R.id.size)        TextView                        mSize;
   @Bind(R.id.toolbar)     Toolbar                         toolbar;
+  @Bind(R.id.speed)       TextView                        mSpeed;
   private                 DownloadEntity                  mEntity;
   private                 BroadcastReceiver               mReceiver;
 
@@ -62,7 +64,15 @@ public class SingleTaskActivity extends BaseActivity<ActivitySingleBinding> {
       super.handleMessage(msg);
       switch (msg.what) {
         case DOWNLOAD_RUNNING:
-          mPb.setProgress((Integer) msg.obj);
+          Task task = (Task) msg.obj;
+          long current = task.getDownloadEntity().getCurrentProgress();
+          long len = task.getDownloadEntity().getFileSize();
+          if (len == 0) {
+            mPb.setProgress(0);
+          } else {
+            mPb.setProgress((int) ((current * 100) / len));
+          }
+          mSpeed.setText(CommonUtil.formatFileSize(task.getDownloadEntity().getSpeed()) + "/s");
           break;
         case DOWNLOAD_PRE:
           mSize.setText(CommonUtil.formatFileSize((Long) msg.obj));
@@ -218,13 +228,7 @@ public class SingleTaskActivity extends BaseActivity<ActivitySingleBinding> {
     }
 
     @Override public void onTaskRunning(Task task) {
-      long current = task.getDownloadEntity().getCurrentProgress();
-      long len = task.getDownloadEntity().getFileSize();
-      if (len == 0) {
-        mPb.setProgress(0);
-      } else {
-        mPb.setProgress((int) ((current * 100) / len));
-      }
+      mUpdateHandler.obtainMessage(DOWNLOAD_RUNNING, task).sendToTarget();
     }
   }
 }

app/src/main/res/layout/content_single.xml

@@ -9,9 +9,8 @@
     tools:showIn="@layout/activity_single"
     >
 
-  <ProgressBar
+  <com.arialyy.simple.widget.HorizontalProgressBarWithNumber
       android:id="@+id/progressBar"
-      style="?android:attr/progressBarStyleHorizontal"
       android:layout_width="wrap_content"
       android:layout_height="20dp"
       android:layout_alignParentLeft="true"
@@ -19,6 +18,8 @@
       android:layout_alignParentTop="true"
       android:layout_margin="16dp"
       android:layout_toLeftOf="@+id/size"
+      android:max="100"
+      style="?android:attr/progressBarStyleHorizontal"
       />
 
   <TextView
@@ -28,45 +29,54 @@
       android:layout_alignParentRight="true"
       android:layout_alignTop="@+id/progressBar"
       android:layout_marginRight="16dp"
-      android:text="ssss"
+      android:text="0mb"
       android:textSize="16sp"
       />
 
+
   <LinearLayout
       android:layout_width="match_parent"
       android:layout_height="wrap_content"
       android:layout_below="@+id/progressBar"
       android:orientation="horizontal"
       >
+    <TextView
+        android:id="@+id/speed"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginLeft="16dp"
+        android:text="0kb/s"
+        android:textColor="@color/black"
+        />
 
     <Button
         android:id="@+id/start"
-        style="?buttonBarButtonStyle"
         android:layout_width="0dp"
         android:layout_height="wrap_content"
         android:layout_weight="1"
         android:onClick="onClick"
         android:text="开始"
+        style="?buttonBarButtonStyle"
         />
 
     <Button
         android:id="@+id/stop"
-        style="?buttonBarButtonStyle"
         android:layout_width="0dp"
         android:layout_height="wrap_content"
         android:layout_weight="1"
         android:onClick="onClick"
         android:text="暂停"
+        style="?buttonBarButtonStyle"
         />
 
     <Button
         android:id="@+id/cancel"
-        style="?buttonBarButtonStyle"
         android:layout_width="0dp"
         android:layout_height="wrap_content"
         android:layout_weight="1"
         android:onClick="onClick"
         android:text="删除任务"
+        style="?buttonBarButtonStyle"
         />
   </LinearLayout>
 </RelativeLayout>

downloadutil/src/main/java/com/arialyy/downloadutil/core/AMReceiver.java

@@ -37,7 +37,7 @@ public class AMReceiver {
    */
   public AMReceiver addSchedulerListener(OnSchedulerListener listener) {
     this.listener = listener;
-    manager.getTaskQueue().getDownloadSchedulers().addSchedulerListener(listener);
+    manager.getTaskQueue().getDownloadSchedulers().addSchedulerListener(obj, listener);
     return this;
   }
 
@@ -46,7 +46,7 @@ public class AMReceiver {
    */
   public AMReceiver removeSchedulerListener() {
     if (listener != null) {
-      manager.getTaskQueue().getDownloadSchedulers().removeSchedulerListener(listener);
+      manager.getTaskQueue().getDownloadSchedulers().removeSchedulerListener(obj, listener);
     }
     return this;
   }

downloadutil/src/main/java/com/arialyy/downloadutil/core/AMTarget.java

@@ -15,7 +15,7 @@ import java.util.List;
 public class AMTarget {
   private AMReceiver receiver;
 
-  public AMTarget(AMReceiver receiver){
+  public AMTarget(AMReceiver receiver) {
     this.receiver = receiver;
   }
 
@@ -24,8 +24,8 @@ public class AMTarget {
    */
   public void start() {
     List<IDownloadCmd> cmds = new ArrayList<>();
-    cmds.add(CommonUtil.createCmd(receiver.entity, CmdFactory.TASK_CREATE));
-    cmds.add(CommonUtil.createCmd(receiver.entity, CmdFactory.TASK_START));
+    cmds.add(CommonUtil.createCmd(receiver.obj, receiver.entity, CmdFactory.TASK_CREATE));
+    cmds.add(CommonUtil.createCmd(receiver.obj, receiver.entity, CmdFactory.TASK_START));
     receiver.manager.setCmds(cmds).exe();
   }
 
@@ -33,21 +33,24 @@ public class AMTarget {
    * 停止下载
    */
   public void stop() {
-    receiver.manager.setCmd(CommonUtil.createCmd(receiver.entity, CmdFactory.TASK_STOP)).exe();
+    receiver.manager.setCmd(
+        CommonUtil.createCmd(receiver.obj, receiver.entity, CmdFactory.TASK_STOP)).exe();
   }
 
   /**
    * 恢复下载
    */
   public void resume() {
-    receiver.manager.setCmd(CommonUtil.createCmd(receiver.entity, CmdFactory.TASK_START)).exe();
+    receiver.manager.setCmd(
+        CommonUtil.createCmd(receiver.obj, receiver.entity, CmdFactory.TASK_START)).exe();
   }
 
   /**
    * 取消下载
    */
   public void cancel() {
-    receiver.manager.setCmd(CommonUtil.createCmd(receiver.entity, CmdFactory.TASK_CANCEL)).exe();
+    receiver.manager.setCmd(
+        CommonUtil.createCmd(receiver.obj, receiver.entity, CmdFactory.TASK_CANCEL)).exe();
   }
 
   public static class SimpleSchedulerListener implements OnSchedulerListener {

downloadutil/src/main/java/com/arialyy/downloadutil/core/command/AddCmd.java

@@ -14,7 +14,6 @@
  * limitations under the License.
  */
 
-
 package com.arialyy.downloadutil.core.command;
 
 import android.util.Log;
@@ -31,10 +30,14 @@ class AddCmd extends IDownloadCmd {
     super(entity);
   }
 
+  AddCmd(Object target, DownloadEntity entity) {
+    super(target, entity);
+  }
+
   @Override public void executeCmd() {
     Task task = mQueue.getTask(mEntity);
     if (task == null) {
-      mQueue.createTask(mEntity);
+      mQueue.createTask(mTarget, mEntity);
     } else {
       Log.w(TAG, "添加命令执行失败，【该任务已经存在】");
     }

downloadutil/src/main/java/com/arialyy/downloadutil/core/command/CancelCmd.java

@@ -26,6 +26,10 @@ import com.arialyy.downloadutil.core.task.Task;
  */
 class CancelCmd extends IDownloadCmd {
 
+  CancelCmd(Object target, DownloadEntity entity) {
+    super(target, entity);
+  }
+
   CancelCmd(DownloadEntity entity) {
     super(entity);
   }
@@ -33,7 +37,7 @@ class CancelCmd extends IDownloadCmd {
   @Override public void executeCmd() {
     Task task = mQueue.getTask(mEntity);
     if (task == null) {
-      task = mQueue.createTask(mEntity);
+      task = mQueue.createTask(mTarget, mEntity);
     }
     if (task != null) {
       mQueue.cancelTask(task);

downloadutil/src/main/java/com/arialyy/downloadutil/core/command/CmdFactory.java

@@ -14,7 +14,6 @@
  * limitations under the License.
  */
 
-
 package com.arialyy.downloadutil.core.command;
 
 import com.arialyy.downloadutil.core.DownloadEntity;
@@ -85,6 +84,38 @@ public class CmdFactory {
     }
   }
 
+  /**
+   * @param target 创建任务的对象
+   * @param entity 下载实体
+   * @param type 命令类型{@link #TASK_CREATE}、{@link #TASK_START}、{@link #TASK_CANCEL}、{@link
+   * #TASK_STOP}
+   */
+  public IDownloadCmd createCmd(Object target, DownloadEntity entity, int type) {
+    switch (type) {
+      case TASK_CREATE:
+        return createAddCmd(target, entity);
+      case TASK_RESUME:
+      case TASK_START:
+        return createStartCmd(target, entity);
+      case TASK_CANCEL:
+        return createCancelCmd(target, entity);
+      case TASK_STOP:
+        return createStopCmd(target, entity);
+      case TASK_SINGLE:
+        return new SingleCmd(target, entity);
+      default:
+        return null;
+    }
+  }
+
+  /**
+   * 创建停止命令
+   *
+   * @return {@link StopCmd}
+   */
+  private StopCmd createStopCmd(Object target, DownloadEntity entity) {
+    return new StopCmd(target, entity);
+  }
 
   /**
    * 创建停止命令
@@ -95,6 +126,15 @@ public class CmdFactory {
     return new StopCmd(entity);
   }
 
+  /**
+   * 创建下载任务命令
+   *
+   * @return {@link AddCmd}
+   */
+  private AddCmd createAddCmd(Object target, DownloadEntity entity) {
+    return new AddCmd(target, entity);
+  }
+
   /**
    * 创建下载任务命令
    *
@@ -104,6 +144,15 @@ public class CmdFactory {
     return new AddCmd(entity);
   }
 
+  /**
+   * 创建启动下载命令
+   *
+   * @return {@link StartCmd}
+   */
+  private StartCmd createStartCmd(Object target, DownloadEntity entity) {
+    return new StartCmd(target, entity);
+  }
+  
   /**
    * 创建启动下载命令
    *
@@ -113,6 +162,15 @@ public class CmdFactory {
     return new StartCmd(entity);
   }
 
+  /**
+   * 创建 取消下载的命令
+   *
+   * @return {@link CancelCmd}
+   */
+  private CancelCmd createCancelCmd(Object target, DownloadEntity entity) {
+    return new CancelCmd(target, entity);
+  }
+
   /**
    * 创建 取消下载的命令
    *

downloadutil/src/main/java/com/arialyy/downloadutil/core/command/IDownloadCmd.java

@@ -14,7 +14,6 @@
  * limitations under the License.
  */
 
-
 package com.arialyy.downloadutil.core.command;
 
 import com.arialyy.downloadutil.core.DownloadEntity;
@@ -31,14 +30,23 @@ public abstract class IDownloadCmd {
   ITaskQueue     mQueue;
   DownloadEntity mEntity;
   String         TAG;
+  Object         mTarget;
 
   /**
    * @param entity 下载实体
    */
   IDownloadCmd(DownloadEntity entity) {
+    this(null, entity);
+  }
+
+  /**
+   * @param target 产生任务的对象
+   */
+  IDownloadCmd(Object target, DownloadEntity entity) {
     if (!CheckUtil.checkDownloadEntity(entity)) {
       return;
     }
+    mTarget = target;
     mEntity = entity;
     TAG = CommonUtil.getClassName(this);
     mQueue = DownloadManager.getInstance().getTaskQueue();

downloadutil/src/main/java/com/arialyy/downloadutil/core/command/SingleCmd.java

@@ -12,6 +12,10 @@ class SingleCmd extends IDownloadCmd {
   /**
    * @param entity 下载实体
    */
+  SingleCmd(Object target, DownloadEntity entity) {
+    super(target, entity);
+  }
+
   SingleCmd(DownloadEntity entity) {
     super(entity);
   }
@@ -19,7 +23,7 @@ class SingleCmd extends IDownloadCmd {
   @Override public void executeCmd() {
     Task task = mQueue.getTask(mEntity);
     if (task == null) {
-      task = mQueue.createTask(mEntity);
+      task = mQueue.createTask(mTarget, mEntity);
     } else {
       Log.w(TAG, "添加命令执行失败，【该任务已经存在】");
     }

downloadutil/src/main/java/com/arialyy/downloadutil/core/command/StartCmd.java

@@ -14,7 +14,6 @@
  * limitations under the License.
  */
 
-
 package com.arialyy.downloadutil.core.command;
 
 import com.arialyy.downloadutil.core.DownloadEntity;
@@ -26,6 +25,10 @@ import com.arialyy.downloadutil.core.task.Task;
  */
 class StartCmd extends IDownloadCmd {
 
+  StartCmd(Object target, DownloadEntity entity) {
+    super(target, entity);
+  }
+
   StartCmd(DownloadEntity entity) {
     super(entity);
   }
@@ -33,7 +36,7 @@ class StartCmd extends IDownloadCmd {
   @Override public void executeCmd() {
     Task task = mQueue.getTask(mEntity);
     if (task == null) {
-      task = mQueue.createTask(mEntity);
+      task = mQueue.createTask(mTarget, mEntity);
     }
     if (task != null) {
       mQueue.startTask(task);

downloadutil/src/main/java/com/arialyy/downloadutil/core/command/StopCmd.java

@@ -30,6 +30,10 @@ class StopCmd extends IDownloadCmd {
   /**
    * @param entity 下载实体
    */
+  StopCmd(Object target, DownloadEntity entity) {
+    super(target, entity);
+  }
+
   StopCmd(DownloadEntity entity) {
     super(entity);
   }
@@ -38,7 +42,7 @@ class StopCmd extends IDownloadCmd {
     Task task = mQueue.getTask(mEntity);
     if (task == null) {
       if (mEntity.getState() == DownloadEntity.STATE_DOWNLOAD_ING) {
-        task = mQueue.createTask(mEntity);
+        task = mQueue.createTask(mTarget, mEntity);
         mQueue.stopTask(task);
       } else {
         Log.w(TAG, "停止命令执行失败，【调度器中没有该任务】");

downloadutil/src/main/java/com/arialyy/downloadutil/core/queue/DownloadTaskQueue.java

@@ -14,7 +14,6 @@
  * limitations under the License.
  */
 
-
 package com.arialyy.downloadutil.core.queue;
 
 import android.content.Context;
@@ -88,7 +87,7 @@ public class DownloadTaskQueue implements ITaskQueue {
   }
 
   @Override public void stopTask(Task task) {
-    if (!task.isDownloading())Log.w(TAG, "停止任务失败，【任务已经停止】");
+    if (!task.isDownloading()) Log.w(TAG, "停止任务失败，【任务已经停止】");
     task.stop();
     //if (task.isDownloading()) {
     //  if (mExecutePool.removeTask(task)) {
@@ -127,8 +126,14 @@ public class DownloadTaskQueue implements ITaskQueue {
     mExecutePool.setDownloadNum(downloadNum);
   }
 
-  @Override public Task createTask(DownloadEntity entity) {
-    Task task = TaskFactory.getInstance().createTask(mContext, entity, mSchedulers);
+  @Override public Task createTask(Object target, DownloadEntity entity) {
+    Task task;
+    if (target == null) {
+      task = TaskFactory.getInstance().createTask(mContext, entity, mSchedulers);
+    } else {
+      task = TaskFactory.getInstance()
+          .createTask(target.getClass().getName(), mContext, entity, mSchedulers);
+    }
     mCachePool.putTask(task);
     return task;
   }

downloadutil/src/main/java/com/arialyy/downloadutil/core/queue/ITaskQueue.java

@@ -47,9 +47,10 @@ public interface ITaskQueue extends IDownloader {
    * 创建一个新的下载任务，创建时只是将新任务存储到缓存池
    *
    * @param entity 下载实体{@link DownloadEntity}
+   * @param target 生成该任务的对象
    * @return {@link Task}
    */
-  public Task createTask(DownloadEntity entity);
+  public Task createTask(Object target, DownloadEntity entity);
 
   /**
    * 通过下载链接从缓存池或任务池搜索下载任务，如果缓存池或任务池都没有任务，则创建新任务

downloadutil/src/main/java/com/arialyy/downloadutil/core/scheduler/DownloadSchedulers.java

@@ -16,15 +16,14 @@
 
 package com.arialyy.downloadutil.core.scheduler;
 
-import android.content.Context;
 import android.os.Message;
+import android.text.TextUtils;
 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;
-import java.util.HashMap;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
 
@@ -81,7 +80,7 @@ public class DownloadSchedulers implements IDownloadSchedulers {
   /**
    * 下载器任务监听
    */
-  Map<Integer, OnSchedulerListener> mSchedulerListeners = new ConcurrentHashMap<>();
+  Map<String, OnSchedulerListener> mSchedulerListeners = new ConcurrentHashMap<>();
   ITaskQueue mQueue;
 
   public DownloadSchedulers(ITaskQueue downloadTaskQueue) {
@@ -130,9 +129,8 @@ public class DownloadSchedulers implements IDownloadSchedulers {
    */
   private void callback(int state, Task task) {
     if (mSchedulerListeners.size() > 0) {
-      //Set<Map.Entry<Integer, String>>
-      for (Map.Entry<Integer, OnSchedulerListener> entry : mSchedulerListeners.entrySet()) {
-        callback(state, task, entry.getValue());
+      if (!TextUtils.isEmpty(task.getTargetName())) {
+        callback(state, task, mSchedulerListeners.get(task.getTargetName()));
       }
     }
   }
@@ -163,15 +161,12 @@ public class DownloadSchedulers implements IDownloadSchedulers {
           break;
         case CANCEL:
           listener.onTaskCancel(task);
-          removeSchedulerListener(listener);
           break;
         case COMPLETE:
           listener.onTaskComplete(task);
-          removeSchedulerListener(listener);
           break;
         case FAIL:
           listener.onTaskFail(task);
-          removeSchedulerListener(listener);
           break;
       }
     }
@@ -213,13 +208,24 @@ public class DownloadSchedulers implements IDownloadSchedulers {
     }
   }
 
-  @Override
-  public void addSchedulerListener(OnSchedulerListener schedulerListener) {
-    mSchedulerListeners.put(schedulerListener.hashCode(), schedulerListener);
+  @Override public void addSchedulerListener(Object target, OnSchedulerListener schedulerListener) {
+    if (target == null) {
+      throw new IllegalArgumentException("target 不能为null");
+    }
+    String name = target.getClass().getName();
+    if (mSchedulerListeners.get(name) != null) {
+      Log.w(TAG, "监听器已存在");
+      return;
+    }
+    mSchedulerListeners.put(name, schedulerListener);
   }
 
-  @Override public void removeSchedulerListener(OnSchedulerListener schedulerListener) {
-    mSchedulerListeners.remove(schedulerListener.hashCode());
+  @Override
+  public void removeSchedulerListener(Object target, OnSchedulerListener schedulerListener) {
+    if (target == null) {
+      throw new IllegalArgumentException("target 不能为null");
+    }
+    mSchedulerListeners.remove(target.getClass().getName());
   }
 
   public void setFailNum(int mFailNum) {

downloadutil/src/main/java/com/arialyy/downloadutil/core/scheduler/IDownloadSchedulers.java

@@ -16,6 +16,7 @@
 
 package com.arialyy.downloadutil.core.scheduler;
 
+import android.content.Context;
 import android.os.Handler;
 import com.arialyy.downloadutil.core.DownloadEntity;
 
@@ -26,16 +27,18 @@ import com.arialyy.downloadutil.core.DownloadEntity;
 public interface IDownloadSchedulers extends Handler.Callback {
 
   /**
-   * 注册下载器监听
+   * 注册下载器监听，一个观察者只能注册一次监听
    *
+   * @param target 观察者，创建该监听器的对象
    * @param schedulerListener {@link OnSchedulerListener}
    */
-  public void addSchedulerListener(OnSchedulerListener schedulerListener);
+  public void addSchedulerListener(Object target, OnSchedulerListener schedulerListener);
 
   /**
+   * @param target 观察者，创建该监听器的对象
    * 取消注册监听器
    */
-  public void removeSchedulerListener(OnSchedulerListener schedulerListener);
+  public void removeSchedulerListener(Object target, OnSchedulerListener schedulerListener);
 
   /**
    * 处理下载任务下载失败的情形

downloadutil/src/main/java/com/arialyy/downloadutil/core/task/Task.java

@@ -32,7 +32,10 @@ import com.arialyy.downloadutil.core.scheduler.DownloadSchedulers;
  */
 public class Task {
   public static final String TAG = "Task";
-
+  /**
+   * 产生该任务对象的hash码
+   */
+  private String            mTargetName;
   private DownloadEntity    mEntity;
   private IDownloadListener mListener;
   private Handler           mOutHandler;
@@ -68,6 +71,14 @@ public class Task {
     return mEntity;
   }
 
+  public String getTargetName() {
+    return mTargetName;
+  }
+
+  public void setmTargetName(String targetName) {
+    this.mTargetName = targetName;
+  }
+
   /**
    * 停止下载
    */
@@ -150,9 +161,15 @@ public class Task {
     Handler        outHandler;
     Context        context;
     int threadNum = 3;
+    String        targetName;
     IDownloadUtil downloadUtil;
 
     public Builder(Context context, DownloadEntity downloadEntity) {
+      this("", context, downloadEntity);
+    }
+
+    public Builder(String targetName, Context context, DownloadEntity downloadEntity) {
+      this.targetName = targetName;
       this.context = context;
       this.downloadEntity = downloadEntity;
     }
@@ -188,6 +205,7 @@ public class Task {
     public Task build() {
       Task task = new Task(context, downloadEntity);
       task.mOutHandler = outHandler;
+      task.setmTargetName(targetName);
       downloadEntity.save();
       return task;
     }

downloadutil/src/main/java/com/arialyy/downloadutil/core/task/TaskFactory.java

@@ -14,7 +14,6 @@
  * limitations under the License.
  */
 
-
 package com.arialyy.downloadutil.core.task;
 
 import android.content.Context;
@@ -51,7 +50,12 @@ public class TaskFactory {
    * @param schedulers {@link IDownloadSchedulers}
    */
   public Task createTask(Context context, DownloadEntity entity, IDownloadSchedulers schedulers) {
-    Task.Builder builder = new Task.Builder(context, entity);
+    return createTask("", context, entity, schedulers);
+  }
+
+  public Task createTask(String targetName, Context context, DownloadEntity entity,
+      IDownloadSchedulers schedulers) {
+    Task.Builder builder = new Task.Builder(targetName, context, entity);
     builder.setOutHandler(schedulers);
     return builder.build();
   }

downloadutil/src/main/java/com/arialyy/downloadutil/util/CommonUtil.java

@@ -36,6 +36,10 @@ import java.util.Properties;
 public class CommonUtil {
   private static final String TAG = "util";
 
+  public static IDownloadCmd createCmd(Object target, DownloadEntity entity, int cmd) {
+    return CmdFactory.getInstance().createCmd(target, entity, cmd);
+  }
+
   public static IDownloadCmd createCmd(DownloadEntity entity, int cmd) {
     return CmdFactory.getInstance().createCmd(entity, cmd);
   }