android - Why is my graph not showing up? -

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i trying use mpandroidchart library in project. how layout , activity code. not showing in layout when run this. sure i'm missing small. it? bugging me why not showing up

graph_activity.xml

<relativelayout xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:tools="http://schemas.android.com/tools"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:paddingleft="@dimen/activity_horizontal_margin"     android:paddingright="@dimen/activity_horizontal_margin"     android:paddingtop="@dimen/activity_vertical_margin"     android:paddingbottom="@dimen/activity_vertical_margin">      <com.github.mikephil.charting.charts.barchart         android:id="@+id/chart"         android:visibility="visible"         android:layout_width="match_parent"         android:layout_height="match_parent" /> </relativelayout>

graphtestactivity.java

public class graphtestactivity extends actionbaractivity {     private linechart responsetimechart;      @override     public void oncreate(bundle savedinstancestate, persistablebundle persistentstate) {         super.oncreate(savedinstancestate, persistentstate);         setcontentview(r.layout.graph_activity);         showbarchart();     }      private void showbarchart() {         barchart chart = (barchart) findviewbyid(r.id.chart);          bardata data = new bardata(getxaxisvalues(), getdataset());         chart.setdata(data);         chart.setdescription("my chart");         chart.animatexy(2000, 2000);         chart.invalidate();     }      private arraylist<bardataset> getdataset() {         arraylist<bardataset> datasets = null;          arraylist<barentry> valueset1 = new arraylist<>();         barentry v1e1 = new barentry(110.000f, 0); // jan         valueset1.add(v1e1);         barentry v1e2 = new barentry(40.000f, 1); // feb         valueset1.add(v1e2);         barentry v1e3 = new barentry(60.000f, 2); // mar         valueset1.add(v1e3);         barentry v1e4 = new barentry(30.000f, 3); // apr         valueset1.add(v1e4);         barentry v1e5 = new barentry(90.000f, 4); // may         valueset1.add(v1e5);         barentry v1e6 = new barentry(100.000f, 5); // jun         valueset1.add(v1e6);          arraylist<barentry> valueset2 = new arraylist<>();         barentry v2e1 = new barentry(150.000f, 0); // jan         valueset2.add(v2e1);         barentry v2e2 = new barentry(90.000f, 1); // feb         valueset2.add(v2e2);         barentry v2e3 = new barentry(120.000f, 2); // mar         valueset2.add(v2e3);         barentry v2e4 = new barentry(60.000f, 3); // apr         valueset2.add(v2e4);         barentry v2e5 = new barentry(20.000f, 4); // may         valueset2.add(v2e5);         barentry v2e6 = new barentry(80.000f, 5); // jun         valueset2.add(v2e6);          bardataset bardataset1 = new bardataset(valueset1, "brand 1");         bardataset1.setcolor(color.rgb(0, 155, 0));         bardataset bardataset2 = new bardataset(valueset2, "brand 2");         bardataset2.setcolors(colortemplate.colorful_colors);          datasets = new arraylist<>();         datasets.add(bardataset1);         datasets.add(bardataset2);         return datasets;     }      private arraylist<string> getxaxisvalues() {         arraylist<string> xaxis = new arraylist<>();         xaxis.add("jan");         xaxis.add("feb");         xaxis.add("mar");         xaxis.add("apr");         xaxis.add("may");         xaxis.add("jun");         return xaxis;     } }

since version 22.1.0, class actionbaractivity deprecated. should use appcompatactivity.

maybe issue why not showing? sure issue related library? have added e.g. textview .xml file , verified if showing?


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