title: LocalActivityManager destroyActivity with animation
body: <p>I wanna add animation effect when a activity call back method.And I use activityGroup to implement activitymanger  and use LocalActivityManager to start and back any activity.</p>
  
  <p>when start an activity  add the animation use the follow code </p>
  
  <pre><code>public static void startActivity(Intent intent, String id) {
  
      View view = mLocalActivityManager.startActivity(id,
              intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)).getDecorView();
  
      Animation hyperspaceJump = AnimationUtils.loadAnimation(mActivityGroup,
              R.anim.dync_in_from_right);
      view.startAnimation(hyperspaceJump);
  
      view.setTag(id);
      mPreviousActivityTag = getCurrentActivityTag();
      mViewContainer.addView(view);
  }
  </code></pre>
  
  <p>but i don't know how to add the animation effect when an activity return back to the one , which start the cur activity. the back method is like that</p>
  
  <pre><code>public static void removeCurrentActivity() {
  
      String tag = getCurrentActivityTag();
      if (com.ct.ipaipai.global.Utily.isStringEmpty(tag) == false) {
  
          int cnt = getActivityCount();
          mViewContainer.removeViewAt(cnt - 1);
          View view = mLocalActivityManager.destroyActivity(tag, true).getDecorView();
      }
  }
  </code></pre>
  
  <p>any one know that?</p>
  
  <p>thanks</p>