问如何使用volley加载大量json数据

EN

//Constant Variable denoting after how many  
//to call in one service
//items numbers you need

private final int LIST_FETCH_COUNT =5;
private final int TOTAL_COUNT=1500;
private int start=0;
private int end=0;

//you can do something like this

for(int i=0;i<TOTAL_COUNT;i+=LIST_FETCH_COUNT){
    callAsyncService(i,i+LIST_FETCH_COUNT);
}

private void callAsyncService(int start,int end){

    //create a new async object
    asynObject.execute(Void,Void,start,end);
}

//inside your async

doInBackground(params...){

    //get start and end values from params and run a service
}

private class DatabaseTask extends AsyncTask<URL, Integer, String> {
 protected String doInBackground(URL... urls) {

    //put here your volley query.

     }
     return results;
 }

 protected void onProgressUpdate(Integer... progress) {

     //You can show the progress of the download with this function:
     setProgressPercent(progress[0]);
 }

 protected void onPostExecute(String results) {
   //Parse the results here and show them in the UI.
 }
}