Android uses open source table framework Mpandroidchart

Address: Https://github.com/PhilJay/MPAndroidChart

1. Gradle Dependency (recommended)

• Add the following to your project level build.gradle :

allprojects {    repositories {        maven {URL "Https://jitpack.io"}}}    

• Add this to your app build.gradle :

dependencies {    implementation ' com.github.philjay:mpandroidchart:v3.0.3 '}

2. Create a Chartevent.java file

 Public classCharteventImplementsOnchartgesturelistener, Onchartvalueselectedlistener {Private  intSpecmount;//number of lanes to display    PrivateLinechart Mchart; Privatearraylist<entry> values =NewArraylist<entry>(); Private int[] specarray;  PublicChartevent (Linechart Wchart,intspecnum) {Specmount=Specnum; Specarray=New int[Specmount]; Mchart=Wchart; Mchart.setonchartgesturelistener ( This); Mchart.setonchartvalueselectedlistener ( This); Mchart.setdrawgridbackground (false); Mchart.getdescription (). SetText (""); Mchart.settouchenabled (true); Mchart.setdragenabled (true); Mchart.setscaleenabled (true); Mchart.setpinchzoom (true); Mchart.setdoubletaptozoomenabled (false); Mymarkerview MV=NewMymarkerview (Myapplication.getcontext (), R.layout.custom_marker_view); Mv.setchartview (Mchart); //For bounds controlMchart.setmarker (MV);//Set The marker to the chartXaxis Xaxis=Mchart.getxaxis ();        Xaxis.setposition (XAxis.XAxisPosition.BOTTOM); Xaxis.setvalueformatter (NewIaxisvalueformatter () {@Override PublicString GetFormattedValue (floatvalue, Axisbase axis) {                return((int) value) *3000/specmount+ "KeV";        }        }); YAxis Leftaxis=Mchart.getaxisleft (); Leftaxis.setaxisminimum (0); YAxis Rightaxis=mchart.getaxisright (); Rightaxis.setenabled (false);//Mchart.setbackgroundcolor (color.gray);SetData (); Mchart.animatex (100); Legend L=Mchart.getlegend ();    L.setform (Legend.LegendForm.LINE); }     Public voidUpdatechart (int[] specdata) {Specarray=Specdata;  for(inti=0;i<specmount;i++) {Values.set (I,NewEntry (i, specarray[i]));        } setData ();    Mchart.invalidate (); }    Private voidSetData () {Linedataset set1; if(Mchart.getdata ()! =NULL&&mchart.getdata (). Getdatasetcount ()> 0) {Set1= (Linedataset) mchart.getdata (). Getdatasetbyindex (0);            Set1.setvalues (values);            Mchart.getdata (). notifydatachanged ();        Mchart.notifydatasetchanged (); } Else {             for(inti = 0; i < Specmount; i++) {Values.add (NewEntry (i, 0)); }            //Create a dataset and give it a typeSet1 =NewLinedataset (values, "real-time spectral lines")); Set1.setdrawicons (false); //Set the line to being drawn like this "- -----"//set1.enabledashedline (10f, 0f, 0f);//set1.enabledashedhighlightline (10f, 0f, 0f);Set1.sethighlightcolor (color.red);            Set1.disabledashedline ();            Set1.setcolor (Color.Black);            Set1.setcirclecolor (Color.Black); Set1.setlinewidth (0.5f);            Set1.setcircleradius (1f); Set1.setdrawcirclehole (false);            Set1.setvaluetextsize (9f); Set1.setdrawfilled (true);            Set1.setformlinewidth (1f); Set1.setformlinedasheffect (NewDashpatheffect (New float[]{10f, 5f}, 0f]); Set1.setformsize (15. f); if(Utils.getsdkint () >= 18) {                //fill drawable only supported in API level and aboveDrawable drawable =contextcompat.getdrawable (Myapplication.getcontext (), r.drawable.fade_red);            Set1.setfilldrawable (drawable); }            Else{set1.setfillcolor (color.black); } ArrayList<ILineDataSet> dataSets =NewArraylist<ilinedataset>(); Datasets.add (SET1); //Add the Datasets//Create a data object with the datasetsLinedata data =NewLinedata (dataSets); //Set Datamchart.setdata (data); }} @Override Public voidOnchartgesturestart (motionevent me, Charttouchlistener.chartgesture lastperformedgesture) {} @Override  Public voidOnchartgestureend (motionevent me, Charttouchlistener.chartgesture lastperformedgesture) {} @Override Public voidonchartlongpressed (motionevent me) {} @Override Public voidonchartdoubletapped (motionevent me) {} @Override Public voidonchartsingletapped (motionevent me) {} @Override Public voidOnchartfling (motionevent me1, Motionevent me2,floatVelocityx,floatvelocityy) {} @Override Public voidOnchartscale (motionevent me,floatScaleX,floatScaleY) {} @Override Public voidOncharttranslate (motionevent me,floatDxfloatDY) {} @Override Public voidonvalueselected (Entry E, Highlight h) {} @Override Public voidonnothingselected () {}}

3. Create a Mymarkerview.java file

/*** Custom implementation of the Markerview. * *@authorPhilipp Jahoda*/ Public classMymarkerviewextendsMarkerview {PrivateTextView tvcontent;  PublicMymarkerview (Context context,intLayoutresource) {        Super(context, layoutresource); Tvcontent=(TextView) Findviewbyid (r.id.tvcontent); }    //callbacks Everytime the Markerview is redrawn, can be used to update the//content (User-interface)@Override Public voidrefreshcontent (Entry E, Highlight Highlight) {if(Einstanceofcandleentry) {candleentry CE=(Candleentry) e; Tvcontent.settext ("" + Utils.formatnumber (Ce.gethigh (), 0,true)); } Else{Tvcontent.settext ("" + Utils.formatnumber (e.gety (), 0,true)); }        Super. Refreshcontent (E, highlight); } @Override Publicmppointf GetOffset () {return Newmppointf (-(GetWidth ()/2),-getheight ()); }}

4. Create a Layout.custom_marker_view.xml file in the Layout folder

<?XML version= "1.0" encoding= "Utf-8"?><Relativelayoutxmlns:android= "Http://schemas.android.com/apk/res/android"Android:layout_width= "Wrap_content"Android:layout_height= "40DP"Android:background= "@drawable/marker2" >    <TextViewAndroid:id= "@+id/tvcontent"Android:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"Android:layout_centerhorizontal= "true"Android:layout_margintop= "7DP"Android:layout_marginleft= "5DP"Android:layout_marginright= "5DP"Android:text=""android:textsize= "12DP"Android:textcolor= "@android: Color/white"android:ellipsize= "End"Android:singleline= "true"android:textappearance= "? Android:attr/textappearancesmall" /></Relativelayout>

5. In the drawable folder configuration, marker2.png pictures, fade_red.xml files, these two files can also be used, one is to click the Display icon prompt, one is the icon line color fill.

Android uses open source table framework Mpandroidchart