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StudentScoreboardActivity.java
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StudentScoreboardActivity.java
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package com.example.musicappcsia;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.widget.ListView;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.StringRequest;
import com.android.volley.toolbox.Volley;
import java.lang.reflect.Array;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
public class StudentScoreboardActivity extends AppCompatActivity {
//private ArrayList<User> student_list = new ArrayList<User>();
private ArrayList<User> inputArray;
public void MergeSort(ArrayList<User> inputArray){
this.inputArray = inputArray;
divide(0, this.inputArray.size()-1);
}
public void divide(int startingIndex,int endingIndex) {
//Divide using recursion until lists only have one element
if (startingIndex < endingIndex && (endingIndex - startingIndex) >= 1) {
int middle = (endingIndex + startingIndex) / 2;
//divide into left and right sub-arrays
divide(startingIndex, middle);
divide(middle + 1, endingIndex);
//merging Sorted array produce above into one sorted array
merge(startingIndex, middle, endingIndex);
}
}
public void merge(int startingIndex,int middleIndex,int endingIndex){
ArrayList<User> tempSortedArray = new ArrayList<User>();
int leftIndex = startingIndex;
int rightIndex = middleIndex+1;
while(leftIndex<=middleIndex && rightIndex<=endingIndex){
if(inputArray.get(leftIndex).get_assign_count()<=inputArray.get(rightIndex).get_assign_count()){
tempSortedArray.add(inputArray.get(leftIndex));
leftIndex++;
}else{
tempSortedArray.add(inputArray.get(rightIndex));
rightIndex++;
}
}
while(leftIndex<=middleIndex){
tempSortedArray.add(inputArray.get(leftIndex));
leftIndex++;
}
while(rightIndex<=endingIndex){
tempSortedArray.add(inputArray.get(rightIndex));
rightIndex++;
}
int i = 0;
int j = startingIndex;
//Transfer sorted array elements into input array
while(i<tempSortedArray.size()){
inputArray.set(j, tempSortedArray.get(i));
i++;
j++;
}
}
private ArrayList<User> student_list = new ArrayList<User>();
private void get_all_student_info_scoreboard() {
RequestQueue requestQueue = Volley.newRequestQueue(this);
StringRequest stringRequest = new StringRequest("http://47.100.220.252:666/get_all_student_info_scoreboard/",
new Response.Listener<String>() {
@Override
public void onResponse(String str) {
Log.d("mytest", str);
String [] user_item_list = str.split("\n");
for(int i=0;i<user_item_list.length;i++)
{
String item = user_item_list[i];
String user_name = item.split(":")[0];
String user_assign_count = item.split(":")[1];
Log.d("mytest", "user_name="+user_name+"user_assign_count="+user_assign_count);
Student s = new Student(Integer.parseInt(user_assign_count), user_name);
student_list.add(s);
//user_name_list.add(user_name);
//user_id_str_list.add(user_id);
//username_to_id.put(user_name, user_id);
}
//sort(student_list_assignments);
MergeSort(student_list);
Log.d("mytest", "ordered assignments" + student_list);
ListView mListView = (ListView) findViewById(R.id.scoreBoardList_student);
ArrayList<Person> peopleList = new ArrayList<>();
for(int i=0;i<student_list.size();i++) {
String name = student_list.get(i).get_name();
String score = ""+student_list.get(i).assignmentScore();
//Create person objects
Person person1 = new Person(name ,score);
//Add the Person obejcts to an ArrayList
peopleList.add(person1);
}
//Create person list adapter
PersonListAdapter adapter = new PersonListAdapter(StudentScoreboardActivity.this, R.layout.adapter_view_layout, peopleList);
mListView.setAdapter(adapter);
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError volleyError) {
//issue with connection to wifi
//add a message box that prompts user to check wifi
Log.d("StudentScoreboardAct", volleyError.getMessage(), volleyError);
}
}
);
requestQueue.add(stringRequest);
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_student_scoreboard);
Log.d("mytest", "activity_student_scoreboard");
student_list.clear();
get_all_student_info_scoreboard();
ListView mListView = (ListView) findViewById(R.id.scoreBoardList_student);
}
}