Error:(66, 27) error: constructor LineData in class LineData cannot be applied to given types; required: ILineDataSet[] found: String[], - android-studio

Question

I was following the example on youtube, https://www.youtube.com/watch?v=TNeE9DJoOMY&t=614s, Creating a Line Graph with multiple data sets in Android Studio. I believe the code is correct... but still getting error: constuctor LineData error.. Another post on stackoverflow suggested that maybe the MPandroidChart library may have changed requiring a different input? The full error is:
Error:(66, 27) error: constructor LineData in class LineData cannot be applied to given types;
required: ILineDataSet[]
found: String[],LineDataSet
reason: varargs mismatch; String[] cannot be converted to ILineDataSet
Here is my main code:
package com.example.rj.linegraph1;
import android.graphics.Color;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import com.github.mikephil.charting.charts.LineChart;
import com.github.mikephil.charting.data.Entry;
import com.github.mikephil.charting.data.LineData;
import com.github.mikephil.charting.data.LineDataSet;
import com.github.mikephil.charting.interfaces.datasets.ILineDataSet;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity {
LineChart lineChart;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
lineChart = (LineChart) findViewById(R.id.lineChart);
ArrayList<String> xAXIS = new ArrayList<>();
ArrayList<Entry> yAXISsin = new ArrayList<>();
ArrayList<Entry> yAXIScos = new ArrayList<>();
double x = 0;
int numDataPoints = 1000;
for (int i = 0; i < numDataPoints; i++) {
float sinFunction = Float.parseFloat(String.valueOf(Math.sin(x)));
float cosFunction = Float.parseFloat(String.valueOf(Math.cos(x)));
x = x + 0.1;
yAXISsin.add(new Entry(sinFunction,i));
yAXIScos.add(new Entry(cosFunction,i));
xAXIS.add(i, String.valueOf(x));
}
String[] xaxis = new String[xAXIS.size()];
for(int i = 0; i < xAXIS.size(); i++) {
xaxis[i] = xAXIS.get(i).toString();
}
ArrayList<ILineDataSet> lineDataSets = new ArrayList<>();
LineDataSet lineDataSet1 = new LineDataSet(yAXIScos,"cos");
lineDataSet1.setDrawCircles(false);
lineDataSet1.setColors(Color.BLUE);
LineDataSet lineDataSet2 = new LineDataSet(yAXISsin,"sin");
lineDataSet2.setDrawCircles(false);
lineDataSet2.setColors(Color.RED);
lineDataSets.add(lineDataSet1);
lineDataSets.add(lineDataSet2);
lineChart.setData(new LineData(xaxis,lineDataSets));
lineChart.setVisibleXRangeMaximum(65f);
}
}

Answer 1

I think this is how the library requires you to do it now:
for (int i = 0; i < numDataPoints; i++) {
float sinFunction = Float.parseFloat(String.valueOf(Math.sin(x)));
float cosFunction = Float.parseFloat(String.valueOf(Math.cos(x)));
x = x + 0.1;
yAXISsin.add(new Entry(x, sinFunction));
yAXIScos.add(new Entry(x, cosFunction));
//dont use strings anymore
//xAXIS.add(i, String.valueOf(x));
}
ArrayList<ILineDataSet> lineDataSets = new ArrayList<>();
LineDataSet lineDataSet1 = new LineDataSet(yAXIScos,"cos");
LineDataSet lineDataSet2 = new LineDataSet(yAXISsin,"sin");
lineDataSet1.setDrawCircles(false);
lineDataSet1.setColors(Color.RED);
lineDataSet2.setDrawCircles(false);
lineDataSet2.setColors(Color.BLUE);
lineDataSets.add(lineDataSet1);
lineDataSets.add(lineDataSet2);
lineChart.setData(new LineData(lineDataSets));
lineChart.setVisibleXRangeMaximum(65f);
Pretty sure it's something like that. You no longer add the X-Axis values like before. Now the X-Axis values just get added as Entry's.
Let me know if this works. I didn't try it myself.

Answer 2

It might be because you need 'x' to be a double for the math operations but you need to convert it to a float for each Entry.
I also added some logs in here so you can debug it might easily.
public class MainActivity extends AppCompatActivity {
//added for debugging
private static final String TAG = "MainActivity";
LineChart lineChart;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
lineChart = (LineChart) findViewById(R.id.lineChart);
ArrayList<Entry> yAXISsin = new ArrayList<>();
ArrayList<Entry> yAXIScos = new ArrayList<>();
double x = 0.0;
int numDataPoints = 1000;
for (int i = 0; i < numDataPoints; i++) {
float sinFunction = Float.parseFloat(String.valueOf(Math.sin(x)));
float cosFunction = Float.parseFloat(String.valueOf(Math.cos(x)));
x = x + 0.1;
float xEntry = Float.parseFloat(String.valueOf(x));
yAXISsin.add(new Entry(xEntry, sinFunction));
yAXIScos.add(new Entry(xEntry, cosFunction));
Log.d(TAG, "Populating Arrays with Data: yAXISsin = " + sinFunction);
Log.d(TAG, "Populating Arrays with Data: yAXIScos = " + cosFunction);
Log.d(TAG, "Populating Arrays with Data: xEntry = " + xEntry);
}
ArrayList<ILineDataSet> lineDataSets = new ArrayList<>();
LineDataSet lineDataSet1 = new LineDataSet(yAXIScos,"cos");
LineDataSet lineDataSet2 = new LineDataSet(yAXISsin,"sin");
lineDataSet1.setDrawCircles(false);
lineDataSet1.setColors(Color.RED);
lineDataSet2.setDrawCircles(false);
lineDataSet2.setColors(Color.BLUE);
lineDataSets.add(lineDataSet1);
lineDataSets.add(lineDataSet2);
lineChart.setData(new LineData(lineDataSets));
lineChart.setVisibleXRangeMaximum(65f);
//can also try calling invalidate() to refresh the graph
lineChart.invalidate();