getTopFrament()方法存在bug about fragmentation HOT 9 CLOSED

    List<Fragment> fragmentList = fragmentManager.getFragments();

    if (fragmentList != null) {

        for (int i = fragmentList.size() - 1; i >= 0; i--) {

            Fragment fragment = fragmentList.get(i);

            if (fragment != null && fragment instanceof SupportFragment) {

                return (SupportFragment) fragment;

            }
        }
    }
    return null;
}

int count = fragmentManager.getBackStackEntryCount();
if (count >0) {
     String tag = fragmentManager.getBackStackEntryAt(fragmentManager.getBackStackEntryCount() - 1).getName();
     Fragment fragment = fragmentManager.findFragmentByTag(tag);
     if (fragment != null && fragment instanceof SupportFragment) {
          return (SupportFragment)fragment;
      }
}
return null;

 public void popAll(Runnable runnable){
        mActivity.preparePopMultiple();
        int count = mFragmentManager.getBackStackEntryCount();
        while (count>0){
            mFragmentManager.popBackStackImmediate();
            count--;
        }
        mActivity.popFinish();

        if (runnable!=null) {
            mHandler.post(runnable);
        }
    }

 public void popAll(Runnable runnable){
        mActivity.preparePopMultiple();
        int count = mFragmentManager.getBackStackEntryCount();
        if (count>0) {
            mFragmentManager.popBackStackImmediate(mFragmentManager.getBackStackEntryAt(0).getName(), FragmentManager.POP_BACK_STACK_INCLUSIVE);
        }
        mActivity.popFinish();

        if (runnable!=null) {
            mHandler.post(runnable);
        }
    }

    mActivity.preparePopMultiple();
    fragmentManager.popBackStackImmediate(fragmentClass.getName(), flag);
    mActivity.popFinish();

    mHandler.post(new Runnable() {
        @Override
        public void run() {
            FragmentTransactionBugFixHack.reorderIndices(fragmentManager);
        }
    });