当在同一片段活动中执行两个AsyncTask时，我的应用程序挂起并仍在加载

Question

我正在尝试在同一个片段中执行两个AsyncTask但是当我运行我的应用程序时，我的手机冻结并仍然加载我的代码 当我执行一个asynTask时，每件事都没问题

这是尝试执行的地方

     @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        Log.w(LOG_TAG,"onActivityCreated------------");

 // First AsyncTask execution called  
    new RecomenddedChaneel().execute();

//Second AsyncTask execution called
    new Loadchannels().execute();

//this is the first asyncTask method

     public class RecomenddedChaneel extends  AsyncTask<String, Void, List<Video>> {

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            pDialog = new ProgressDialog(getActivity());
            pDialog.setMessage("Loading channel list. Please wait...");
            pDialog.setIndeterminate(false);
            pDialog.setCancelable(false);
            pDialog.show();
        }
     @Override
        protected List<Video> doInBackground(String... urls) {
            channelForCategory= new ArrayList<Video>();
            channelForCategory.clear();

            // Building Parameters
            List<NameValuePair> params = new ArrayList<NameValuePair>();
            params.add(new BasicNameValuePair("uky", uk));
            params.add(new BasicNameValuePair("per_page","10"));
            JSONObject json = JsonFromHttp.makeHttpRequest(url+"getrecommended_top","POST", params);

            try {
                products=json.getJSONArray("products");
                channelForCategory.clear();
                listchD.clear();
                String imageViewch =null;
                for(int i =0; i <products.length();i++){
                    JSONObject details = products.getJSONObject(i);
                    String pid =details.getString("pid");
                    String cid=details.getString("cid");
                    String name= details.getString("name");
                    Log.v("",name);
                    if(details.has("imageViewch")){
                        imageViewch = details.getString("imageViewch");}
                    String image_url_path= imageurl+imageViewch;
                    channelForCategory.add(new Video(pid,cid,name,image_url_path));
                    listchD.add(new Video(name,pid));
                    Log.w(LOG_TAG,"pid*************all************"+pid);
                    Log.w(LOG_TAG,"cid*********all**********"+cid);
                    Log.w(LOG_TAG,"name********all**********"+name);
                    Log.w(LOG_TAG,"imagelink*********all***********"+imageViewch);

                }

            } catch (JSONException e){
                Log.e("SetHttp", "Problem parsing News JSON results", e);
            }
            return null;
            // return videos;
     @Override
        protected void onPostExecute(List<Video> video) {
            pDialog.dismiss();          

     ChannelRecycleViewAdapter channelRecycleViewAdapter1
                    = new ChannelRecycleViewAdapter(getActivity(), channelForCategory, new ChannelRecycleViewAdapter.ListItemClickListener() {
                @Override
                public void onListItemClick(int clickedItemIndex) {
                    Video videoch= channelForCategory.get(clickedItemIndex);
                    String  urlch=videoch.getmpid();
                    Intent inturl= new Intent(getActivity(),VideoPlayer.class);
                    inturl.putExtra("urlch",urlch);
                    inturl.putExtra("list_video_name", (Serializable) listchD);
                    startActivity(inturl);

                    Toast.makeText(getActivity(),
                            urlch, Toast.LENGTH_LONG).show();

                }
            });
            recyclerView1.setAdapter(channelRecycleViewAdapter1);

，第二个asynctask是第一个asynctask的副本。 我不知道为什么应用程序挂起并仍在加载。