Android Combat Simple Tutorial-16th gun (Linechart to achieve data trend display)

The line chart in Achartengine is a graph of lines, a kind of data display. First we will download the Achartengine jar package and import it into the project.

Look directly at the code (some comments):

Package Com.yayun.linechart;import Java.util.arraylist;import Java.util.list;import org.achartengine.ChartFactory; Import Org.achartengine.chart.pointstyle;import Org.achartengine.model.xymultipleseriesdataset;import Org.achartengine.model.xyseries;import Org.achartengine.renderer.xymultipleseriesrenderer;import Org.achartengine.renderer.xyseriesrenderer;import Android.app.activity;import Android.graphics.Color;import Android.graphics.paint.align;import Android.os.bundle;import Android.view.view;public class MainActivity extends Activity {@Overridepublic void onCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate); String[] titles = new string[] {"Crete", "CORFU", "Thassos", "Skiathos"};//four headings, i.e. four cities list<double[]> x = new Array  List<double[]> (); for (int i = 0; i < titles.length; i++) {X.add (new double[] {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, //x axis value}list<double[]> values = new arraylist<double[]> ();//The value to be displayed Values.add (new double[] {12.3, 12.5, 13.8, 16.8, 20.4, 24.4, 26.4,26.1, 23.6, 20.3, 17.2, 13.9}); Values.add (new double[] {10, 10, 12, 15, 20, 24, 26, 26, 14,11}); Values.add (new double[] {5, 5.3, 8, 9,, 24.2, 6}); Values.add (new double[] {9, 1 0, one, ten, (+), Max, (+), (+), (+), int[] colors = new int[] {color.blue, color.green, Color.cyan,color.yellow} ;///four display colors pointstyle[] styles = new pointstyle[] {pointstyle.circle,pointstyle.diamond, pointstyle.triangle, Pointstyle.square};//Four display styles Xymultipleseriesrenderer renderer = buildrenderer (colors, styles); int length = Renderer.getseriesrenderercount (); for (int i = 0; i < length; i++) {((Xyseriesrenderer) Renderer.getseriesrendererat ( i). Setfillpoints (true);} Setchartsettings (renderer, "Average temperature", "Month", "Temperature", 0.5, 12.5, -10, +, Color.ltgray, Color.ltgray ); Renderer.setxlabels (renderer.setylabels); Renderer.setshowgrid (true); Renderer.setxlabelsalign ( Align.right); renderer.setylabelsalign (align.right); rEnderer.setzoombuttonsvisible (TRUE);//Zoom button renderer.setpanlimits (new double[] {-10, 20,-10, 40}); Renderer.setzoomlimits (New double[] {-10, 20,-10, 40}); View view = Chartfactory.getlinechartview (This,builddataset (titles, x, values), renderer);// Get Viewview.setbackgroundcolor (Color.Black);//Background color setcontentview (view);} Private Xymultipleseriesrenderer Buildrenderer (int[] colors,pointstyle[] styles) {Xymultipleseriesrenderer renderer = New Xymultipleseriesrenderer (); Setrenderer (renderer, colors, styles); return renderer;} private void Setrenderer (Xymultipleseriesrenderer renderer, int[] colors,pointstyle[] styles) { Renderer.setaxistitletextsize (renderer.setcharttitletextsize); renderer.setlabelstextsize (15); Renderer.setlegendtextsize, Renderer.setpointsize (5f), Renderer.setmargins (new int[] {(+), (+), n}); int length = colors.length;for (int i = 0; i < length; i++) {Xyseriesrenderer r = new Xyseriesrenderer (); R.setcolor (Colors[i]); r.set Pointstyle (Styles[i]); Renderer.addserieSrenderer (R);}} private void Setchartsettings (xymultipleseriesrenderer renderer,//coordinates set string title, String Xtitle, String ytitle, Double xmin,double xmax, double ymin, double yMax, int axescolor,int labelscolor) {renderer.setcharttitle (title); Renderer.setxtitle (Xtitle); Renderer.setytitle (Ytitle); Renderer.setxaxismin (xMin); Renderer.setxaxismax (XMax); Renderer.setyaxismin (ymin); Renderer.setyaxismax (YMax); Renderer.setaxescolor (Axescolor); Renderer.setlabelscolor (Labelscolor);} Private Xymultipleseriesdataset Builddataset (string[] titles,//create DataSet list<double[]> xValues, list<double[] > Yvalues) {xymultipleseriesdataset DataSet = new Xymultipleseriesdataset (); Addxyseries (DataSet, titles, XValues, Yvalues, 0); return dataset;} private void Addxyseries (Xymultipleseriesdataset DataSet, string[] titles,list<double[]> xValues, list< double[]> yvalues, int scale) {int length = titles.length;for (int i = 0; i < length; i++) {Xyseries series = new XY Series (Titles[i], scale);d ouble[] XV = Xvalues.get (i);d ouble[] yv = Yvalues.get (i); int serieslength = xv.length;for (int k = 0; k < serieslength; k++) {Series.add (xv[k], yv[k]);} Dataset.addseries (series);}}}

The effect of running the instance is as follows:

Like a friend can pay attention to me, thank you!

Android Combat Simple Tutorial-16th gun (Linechart to achieve data trend display)