使用 MPAndroidChart 单独绘制折线图?

Question

我正在使用MPAndroidChart库来显示折线图。我无法使用 TermWise 单独清楚地显示折线图。我使用相同的 ArrayList，即调用 allMarks 来存储所有术语的信息。当我清除 ArrayList 时，如果 ArrayList.Clear();不使用，则显示所有标记。如何单独显示每个术语标记？

挡泥板

public class Dashboard extends Fragment {
ListView listViewNotice, listviewpendingbills;
String Navigation_URL = "http://192.168.100.5:84/api/academics/getNotices";
String Navigation_URL_BIlls = "http://192.168.100.5:84/Api/financeApi/getAllFees";
String Navigation_URL_CHART = "http://192.168.100.5:84/api/academics/getSingleStudentsMarks";
String Navigation_URL_getExam = "http://192.168.100.5:84/api/academics/getExams";
String Navigation_URL_getExamData = "http://192.168.100.5:84/api/academics/getStdMarksByTermStd";

String access_token;
String Notice, BillNumber, Status, AmountPaid, ReceiptIssueDate;
String master_id;
TextView pendingbills, NoNotice;
LineChart chart;

private static final String TAG = "Test";
ArrayList<Entry> entries, entry;
ArrayList<String> labels = new ArrayList<String>();
LineDataSet set, set1;
LineData data, data2;
// ArrayList<LineData> xVals = new ArrayList<String>();
ArrayList allExams;
ArrayList getCourses;
ArrayList getMarks;
ArrayList getCourseID;
ArrayList getExamDesc;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_dashboard, container, false);
// getActivity().setTitle("St. Xavier's High School");
setHasOptionsMenu(true);
listViewNotice = (ListView) view.findViewById(R.id.list_student_notice_dashboard);
listviewpendingbills = (ListView) view.findViewById(R.id.student_dashboard_pendingbills);
pendingbills = (TextView) view.findViewById(R.id.textpendingbills);
NoNotice = (TextView) view.findViewById(R.id.textnoticedashboard);
//  lineChart = (BarChart) view.findViewById(R.id.chart1);
chart = (LineChart) view.findViewById(R.id.chart1);
SessionManagement session = new SessionManagement(getContext());
session.checkLogin();
access_token = session.getAccesstToken();
master_id = session.getMasterId();
makeJsonObjectRequestNotices();
makeJsonObjectRequestBills();
//  makeJsonObjectRequestGraph();
makeJsonObjectMarksWithGraph();
allExams = new ArrayList();
getCourses = new ArrayList();
getMarks = new ArrayList();
getCourseID = new ArrayList();
getExamDesc = new ArrayList();
labels.add("Math");
chart.getXAxis().setValueFormatter(new IndexAxisValueFormatter(labels));
chart.invalidate();
return view;
}
String examDescription;
private void makeJsonObjectMarksWithGraph() {
RequestQueue requestQueue = Volley.newRequestQueue(getContext());
String URL1 = Navigation_URL_getExam;
StringRequest stringRequest = new StringRequest(Request.Method.GET, URL1,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
try {
JSONArray jArray = new JSONArray(response);
for (int i = 0; i < jArray.length(); i++) {
JSONObject jsonObject = jArray.getJSONObject(i);
String TermID = jsonObject.getString("TermID");
examDescription = jsonObject.getString("examDescription");
getTermID(TermID, examDescription);
allExams.add(TermID);
Log.d("Term ID", getTermID(TermID, examDescription));
}
Log.d("All Exam", String.valueOf(allExams.size()));
int j;
for (j = 0; j < allExams.size(); j++) {
String termID = (String) allExams.get(j);
getExamData(termID);
}

//Collections.sort(entries, new EntryXComparator());
} catch (JSONException e) {
Toast.makeText(getContext(), "Fetch failed!", Toast.LENGTH_SHORT).show();
e.printStackTrace();
}
}
}
, new Response.ErrorListener()
{
@Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(getContext(), error.toString(), LENGTH_LONG).show();
}
}
)
{
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
Map<String, String> headers = new HashMap<String, String>();
headers.put("Authorization", "Bearer " + access_token);
headers.put("Content-Type", "application/x-www-form-urlencoded");
return headers;
}
/*      @Override
protected Map<String, String> getParams() throws com.android.volley.AuthFailureError {
Map<String, String> map = new HashMap<String, String>();
map.put("id", master_id);
//map.put("accessID", accessID);
map.put("currentUser", master_id);
return map;
}   */
};

requestQueue.add(stringRequest);
}
public String TermID;
public String Description;
private String getTermID(String TermID, String Description) {
this.TermID = TermID;
this.Description = Description;
return TermID;
}
private void getExamData(String TermID) {
RequestQueue requestQueue = Volley.newRequestQueue(getContext());
String URL1 = Navigation_URL_getExamData + "?StdID=" + master_id + "&TermID=" + TermID;
//String URL1 = Navigation_URL_CHART + "?StdID=" + master_id;
StringRequest stringRequest = new StringRequest(Request.Method.GET, URL1,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
try {
JSONArray jArray = new JSONArray(response);
if (jArray.length() != 0) {
for (int i = 0; i < jArray.length(); i++) {
JSONObject jsonObject = jArray.getJSONObject(i);

Log.d("JSON Object", String.valueOf(jsonObject));
String CourseId = jsonObject.getString("CourseID");
String CourseName = jsonObject.getString("CourseName");
String examDescription = jsonObject.getString("examDescription");
Float Marks = Float.valueOf(jsonObject.getString("Marks"));

getMarks.add(Marks);
getCourses.add(CourseName);
getCourseID.add(CourseId);
getExamDesc.add(examDescription);
System.out.println("the Courses are" + getCourses);
}
Log.d("JSON Object", String.valueOf(getMarks));
plotGraph(getMarks);
//getMarks.clear();
}
} catch (JSONException e) {
Toast.makeText(getContext(), "Fetch failed!", Toast.LENGTH_SHORT).show();
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(getContext(), error.toString(), LENGTH_LONG).show();
}
}) {
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
Map<String, String> headers = new HashMap<String, String>();
headers.put("Authorization", "Bearer " + access_token);
headers.put("Content-Type", "application/x-www-form-urlencoded");
return headers;
}
};
requestQueue.add(stringRequest);
}
ArrayList<Entry> allMarks = new ArrayList<Entry>();
private void plotGraph(ArrayList getMarks) {
ArrayList<Entry> allMarks = new ArrayList<Entry>();
System.out.println("GetMARKS" + getMarks.size());
ArrayList<ILineDataSet> testDataSet = new ArrayList<>();
// HashMap<ILineDataSet> map = new HashMap<String, String>();

for (int k = 0; k < getMarks.size(); k++) {
/*  allMarks.add(new Entry(k, (Float) getMarks.get(k)));
set = new LineDataSet(allMarks, examDescription);
data = new LineData(set);
lines.add(data);
chart.setData(data);
set.setColor(Color.GREEN);
set.setDrawFilled(true);
set.setDrawValues(true);
chart.notifyDataSetChanged();
chart.invalidate();
*/

allMarks.add(new Entry(k, (Float) getMarks.get(k)));
LineDataSet set = new LineDataSet(allMarks, examDescription);
// set different color for each set as your requirement
testDataSet.add(set);
chart.notifyDataSetChanged();
chart.invalidate();
//  allMarks.clear();
}
chart.setData(new LineData(testDataSet));
}
}

http://192.168.100.5:84/api/academics/getSingleStudentsMarks?StdID=0095

[
{
"CLASSNO": "1",
"CLASS_ID": 2021,
"CourseID": 4027,
"Marks": 45,
"Sno": 2107,
"StdID": 95,
"TermID": 6022,
"CourseName": "Arts",
"Terminal_FM": 100,
"Terminal_PM": 40,
"UT_FM": 50,
"UT_PM": 20,
"examDescription": "First Term",
"type": "Terminal",
"NAME": "Calvin Patterson"
},
{
"CLASSNO": "1",
"CLASS_ID": 2021,
"CourseID": 5034,
"Marks": 90,
"Sno": 2108,
"StdID": 95,
"TermID": 6022,
"CourseName": "Math",
"Terminal_FM": 100,
"Terminal_PM": 40,
"UT_FM": 50,
"UT_PM": 20,
"examDescription": "First Term",
"type": "Terminal",
"NAME": "Calvin Patterson"
},
{
"CLASSNO": "1",
"CLASS_ID": 2021,
"CourseID": 5035,
"Marks": 52,
"Sno": 2109,
"StdID": 95,
"TermID": 6022,
"CourseName": "English",
"Terminal_FM": 100,
"Terminal_PM": 40,
"UT_FM": 50,
"UT_PM": 20,
"examDescription": "First Term",
"type": "Terminal",
"NAME": "Calvin Patterson"
},
{
"CLASSNO": "1",
"CLASS_ID": 2021,
"CourseID": 6034,
"Marks": 70,
"Sno": 2110,
"StdID": 95,
"TermID": 6022,
"CourseName": "hi",
"Terminal_FM": 100,
"Terminal_PM": 40,
"UT_FM": 50,
"UT_PM": 20,
"examDescription": "First Term",
"type": "Terminal",
"NAME": "Calvin Patterson"
},
{
"CLASSNO": "1",
"CLASS_ID": 2021,
"CourseID": 4027,
"Marks": 50,
"Sno": 4119,
"StdID": 95,
"TermID": 7024,
"CourseName": "Arts",
"Terminal_FM": 100,
"Terminal_PM": 40,
"UT_FM": 50,
"UT_PM": 20,
"examDescription": "Second",
"type": "Terminal",
"NAME": "Calvin Patterson"
},
{
"CLASSNO": "1",
"CLASS_ID": 2021,
"CourseID": 5034,
"Marks": 60,
"Sno": 4120,
"StdID": 95,
"TermID": 7024,
"CourseName": "Math",
"Terminal_FM": 100,
"Terminal_PM": 40,
"UT_FM": 50,
"UT_PM": 20,
"examDescription": "Second",
"type": "Terminal",
"NAME": "Calvin Patterson"
},
{
"CLASSNO": "1",
"CLASS_ID": 2021,
"CourseID": 5035,
"Marks": 70,
"Sno": 4121,
"StdID": 95,
"TermID": 7024,
"CourseName": "English",
"Terminal_FM": 100,
"Terminal_PM": 40,
"UT_FM": 50,
"UT_PM": 20,
"examDescription": "Second",
"type": "Terminal",
"NAME": "Calvin Patterson"
},
{
"CLASSNO": "1",
"CLASS_ID": 2021,
"CourseID": 6034,
"Marks": 80,
"Sno": 4122,
"StdID": 95,
"TermID": 7024,
"CourseName": "hi",
"Terminal_FM": 100,
"Terminal_PM": 40,
"UT_FM": 50,
"UT_PM": 20,
"examDescription": "Second",
"type": "Terminal",
"NAME": "Calvin Patterson"
},
{
"CLASSNO": "1",
"CLASS_ID": 2021,
"CourseID": 4027,
"Marks": 10,
"Sno": 4123,
"StdID": 95,
"TermID": 7025,
"CourseName": "Arts",
"Terminal_FM": 100,
"Terminal_PM": 40,
"UT_FM": 50,
"UT_PM": 20,
"examDescription": "Third",
"type": "Terminal",
"NAME": "Calvin Patterson"
},
{
"CLASSNO": "1",
"CLASS_ID": 2021,
"CourseID": 5034,
"Marks": 20,
"Sno": 4124,
"StdID": 95,
"TermID": 7025,
"CourseName": "Math",
"Terminal_FM": 100,
"Terminal_PM": 40,
"UT_FM": 50,
"UT_PM": 20,
"examDescription": "Third",
"type": "Terminal",
"NAME": "Calvin Patterson"
},
{
"CLASSNO": "1",
"CLASS_ID": 2021,
"CourseID": 5035,
"Marks": 30,
"Sno": 4125,
"StdID": 95,
"TermID": 7025,
"CourseName": "English",
"Terminal_FM": 100,
"Terminal_PM": 40,
"UT_FM": 50,
"UT_PM": 20,
"examDescription": "Third",
"type": "Terminal",
"NAME": "Calvin Patterson"
},
{
"CLASSNO": "1",
"CLASS_ID": 2021,
"CourseID": 6034,
"Marks": 90,
"Sno": 4126,
"StdID": 95,
"TermID": 7025,
"CourseName": "hi",
"Terminal_FM": 100,
"Terminal_PM": 40,
"UT_FM": 50,
"UT_PM": 20,
"examDescription": "Third",
"type": "Terminal",
"NAME": "Calvin Patterson"
},
{
"CLASSNO": "1",
"CLASS_ID": 2021,
"CourseID": 4027,
"Marks": 80,
"Sno": 4127,
"StdID": 95,
"TermID": 7026,
"CourseName": "Arts",
"Terminal_FM": 100,
"Terminal_PM": 40,
"UT_FM": 50,
"UT_PM": 20,
"examDescription": "fourth term",
"type": "Terminal",
"NAME": "Calvin Patterson"
},
{
"CLASSNO": "1",
"CLASS_ID": 2021,
"CourseID": 5034,
"Marks": 10,
"Sno": 4128,
"StdID": 95,
"TermID": 7026,
"CourseName": "Math",
"Terminal_FM": 100,
"Terminal_PM": 40,
"UT_FM": 50,
"UT_PM": 20,
"examDescription": "fourth term",
"type": "Terminal",
"NAME": "Calvin Patterson"
},
{
"CLASSNO": "1",
"CLASS_ID": 2021,
"CourseID": 5035,
"Marks": 76,
"Sno": 4129,
"StdID": 95,
"TermID": 7026,
"CourseName": "English",
"Terminal_FM": 100,
"Terminal_PM": 40,
"UT_FM": 50,
"UT_PM": 20,
"examDescription": "fourth term",
"type": "Terminal",
"NAME": "Calvin Patterson"
},
{
"CLASSNO": "1",
"CLASS_ID": 2021,
"CourseID": 6034,
"Marks": 93,
"Sno": 4130,
"StdID": 95,
"TermID": 7026,
"CourseName": "hi",
"Terminal_FM": 100,
"Terminal_PM": 40,
"UT_FM": 50,
"UT_PM": 20,
"examDescription": "fourth term",
"type": "Terminal",
"NAME": "Calvin Patterson"
}
]

我目前正在OneArray中获得所有术语标记，称为AllMarks。我不能在同一图表中用不同的术语和不同的颜色绘制标记吗？

Answer 1

这应该是你的解决方法。 应分组和显示术语数据

private void makeJsonObjectMarksWithGraph() {
RequestQueue requestQueue = Volley.newRequestQueue(getContext());
String URL1 = Navigation_URL_getExam;
StringRequest stringRequest = new StringRequest(Request.Method.GET, URL1,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
try {

JSONArray jsonArray = new JSONArray(response);
HashMap<Integer, ArrayList<JSONObject>> dataFilteredByTerm = new HashMap<>();
// filter response to add terms
ArrayList<Integer> termIDs = new ArrayList<>();
for (int i = 0; i < jsonArray.length(); i++) {
if (i == 0) {
termIDs.add(jsonArray.optJSONObject(i).optInt("TermID"));
}
boolean check = termIDs.contains(jsonArray.optJSONObject(i).optString("TermID"));
if (check) {
termIDs.add(jsonArray.optJSONObject(i).optInt("TermID"));
}
}
//group json response according to term ids
for (int i = 0; i < termIDs.size(); i++) {
ArrayList<JSONObject> jsonObjects = new ArrayList<>();
for (int k = 0; k < jsonArray.length(); k++) {
if (termIDs.get(i) == jsonArray.optJSONObject(k).optInt("TermID")) {
jsonObjects.add(jsonArray.optJSONObject(k));
}
}
dataFilteredByTerm.put(termIDs.get(i), jsonObjects);
}
//set entry for every marks grouped by terms
ArrayList<ILineDataSet> testDataSet = new ArrayList<>();
for (int i = 0; i < dataFilteredByTerm.size(); i++) {
ArrayList<JSONObject> values = dataFilteredByTerm.get(termIDs.get(i));
ArrayList<Entry> allMarks = new ArrayList<>();
for (int k = 0; k < values.size(); k++) {
allMarks.add(new Entry(k, values.get(k).optInt("Marks")));
}
LineDataSet set = new LineDataSet(allMarks, values.get(i).optString("examDescription"));
testDataSet.add(set);
}
chart.setData(new LineData(testDataSet));
chart.notifyDataSetChanged();
chart.invalidate();

} catch (JSONException e) {
Toast.makeText(getContext(), "Fetch failed!", Toast.LENGTH_SHORT).show();
e.printStackTrace();
}

}

}
, new Response.ErrorListener()
{
@Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(getContext(), error.toString(), LENGTH_LONG).show();
}
}
)
{
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
Map<String, String> headers = new HashMap<String, String>();
headers.put("Authorization", "Bearer " + access_token);
headers.put("Content-Type", "application/x-www-form-urlencoded");
return headers;
}
/*      @Override
protected Map<String, String> getParams() throws com.android.volley.AuthFailureError {
Map<String, String> map = new HashMap<String, String>();
map.put("id", master_id);
//map.put("accessID", accessID);
map.put("currentUser", master_id);
return map;
}   */
};

requestQueue.add(stringRequest);
}

Answer 2

试试这个。它会将您的图表显示为立方体形状而不是直线。

dataset.setDrawFilled(true);
dataset.setDrawCubic(true);
dataset.setDrawValues(false);

数据集是LineDataSet的对象。

上面的代码适用于版本编译'com.github.PhilJay：MPAndroidChart：v2.1.6'