android - MPAndroidChart: Creating a closed chart (circular line chart) -

i need draw "closed chart" in android app, this:

the xindex of data first increases decreases. in example:

[3,3],[4,4],[5,5],[6,4],[7,3],[6,2],[5,1],[4,2],[3,3] 

when try drawing lineСhart data in mpandroidchart, renders first half of data (prior fall of xindex). other data not shown.

how can draw data correctly mpandroidchart ?

the sample app on google play store gives example of every kind of chart available in library. likewise, source code available inspect , see if has feature want.

additionally, the wiki says unordered line chart entries not supported.

please aware library not officially support drawing linechart data entry list not sorted x-position of entries in ascending manner.

that being said, if willing pre-process data should able achieve want. have take data , extract 2 distinct datasets apply same styling. able achieve effect want using technique:

here code:

import android.graphics.color; import android.os.bundle; import android.support.annotation.nonnull; import android.view.menu; import android.view.windowmanager; import android.widget.seekbar; import android.widget.textview;  import com.github.mikephil.charting.charts.linechart; import com.github.mikephil.charting.components.legend; import com.github.mikephil.charting.components.legend.legendform; import com.github.mikephil.charting.components.xaxis; import com.github.mikephil.charting.components.yaxis; 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 com.xxmassdeveloper.mpchartexample.notimportant.demobase;  import java.util.arraylist; import java.util.random;  public class linechartactivity4 extends demobase {      private linechart mchart;     private random rand;      @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         rand = new random();         getwindow().setflags(windowmanager.layoutparams.flag_fullscreen,                 windowmanager.layoutparams.flag_fullscreen);         setcontentview(r.layout.activity_linechart);          mchart = (linechart) findviewbyid(r.id.chart1);         mchart.setdrawgridbackground(false);         mchart.getdescription().setenabled(false);         mchart.settouchenabled(true);         mchart.setscalexenabled(true);         mchart.setscaleyenabled(true);         mchart.setpinchzoom(true);         mchart.getlegend().setenabled(false);         yaxis leftaxis = mchart.getaxisleft();         leftaxis.removealllimitlines(); // reset limit lines avoid overlapping lines         leftaxis.enablegriddashedline(10f, 10f, 0f);         leftaxis.setdrawzeroline(false);         leftaxis.setdrawlimitlinesbehinddata(true);         mchart.getaxisright().setenabled(true);         mchart.setdragoffsetx(20);         mchart.setdata(generatecloseddata(90, 180, 15));         mchart.animatex(2500);     }      private linedata generatecloseddata(float offset, float range, float delta) {         arraylist<entry> topentries = new arraylist<>();         arraylist<entry> bottomentries = new arraylist<>();          (int x = 0; x <= 180; x++) {             float val1 = offset + generatevalue(x, range, delta);             float val2 = offset - generatevalue(x, range, delta);             topentries.add(new entry(x, val1));             bottomentries.add(new entry(x, val2));         }          linedataset set1 = generatelinedataset(topentries);         linedataset set2 = generatelinedataset(bottomentries);          arraylist<ilinedataset> datasets = new arraylist<>();         datasets.add(set1);         datasets.add(set2);         linedata data = new linedata(datasets);         return data;     }      private float generatevalue(int x, float range, float delta) {         float sine = (float) math.sin(math.toradians(x));         float scaledsine = sine * range;         if (x == 0 || x == 180) {             return scaledsine;         }         else {             return scaledsine + rand.nextfloat() * delta;         }     }      @nonnull     private linedataset generatelinedataset(arraylist<entry> topentries) {         linedataset set;         set = new linedataset(topentries, "");         set.setcolor(color.blue);         set.setdrawcircles(false);         set.setlinewidth(4f);         set.setvaluetextsize(9f);         set.setformsize(15.f);         return set;     }      @override     public boolean oncreateoptionsmenu(menu menu) {         getmenuinflater().inflate(r.menu.line, menu);         return true;     } }