Use of the "Android" Achartengine Histogram and pie chart

The comments in the code explain how the various settings in the icon are used.

A. Download of the Achartengine library:

Http://code.google.com/p/achartengine/downloads/list

After the download is complete, paste the jar file into the Libs folder

Two. How to use the Android project

First define a Graphicalview

Graphicalview Graphicalview;

Then, get from Chartfactory

Graphicalview=chartfactory.getbarchartview (Getbasecontext (), DataSet, renderer, type);//Histogram
Graphicalview=chartfactory.getpiechartview (Getbasecontext (), DataSet, renderer);//Pie chart

Where a dataset represents a data source, renderer represents a render parameter, type represents a

How to set up a dataset--pie chart

Double[] values={412.0,542.0,486.0,900.1}; Categoryseries dataset=buildcategorydataset ("Test pie chart", values);

1 protected categoryseries Buildcategorydataset (String title, double[] values) {2         categoryseries series = new Categor Yseries (title), 3         series.add ("Poor", Values[0]), 4         series.add ("substandard", values[1]), 5         Series.add ("Compliance", values[ 2]); 6         Series.add ("excellent", values[3]); 7         return series;8       }

How to set a dataset--histogram----histogram can have multiple sets of data

1 string[] titles={"test"};2         list<double[]> values=new arraylist<double[]> (); 3         Values.add (new double[]{5120.0,21251.0,25610.0}); 4         Xymultipleseriesdataset Dataset=buildbardataset (titles, values);

1  protected Xymultipleseriesdataset buildbardataset (string[] titles, list<double[]> values) {2             Xymultipleseriesdataset DataSet = new Xymultipleseriesdataset (); 3             int length = titles.length; 4 for             (int i = 0; i < length; i++) {5                 categoryseries series = new Categoryse Ries (Titles[i]); 6                 double[] v = values.get (i), 7                 int serieslength = v.length, 8 for                 (int k = 0; k < serieslength; k++) {9
   series.add (V[k]);                 }11                 dataset.addseries (Series.toxyseries ());             }13             return dataset;14         }

How to set renderer--Pie chart

1 int[] colors={color.blue,color.green,color.magenta,color.red};2 defaultrenderer renderer=buildCategoryRenderer ( colors);

 1 protected Defaultrenderer buildcategoryrenderer (int[] colors) {2 Defaultrenderer renderer = new Defaultrendere R (); 3 4 renderer.setlegendtextsize (20);//Set the text size of the bottom-left note to 5//renderer.setzoombuttonsvisible (TRUE);//Set display magnification   Small button 6 renderer.setzoomenabled (FALSE);//setting does not allow zooming in and out. 7 renderer.setcharttitletextsize (30);//Set the text size of the chart title 8 Renderer.setcharttitle ("Statistical results");//Set the title of the chart to the top of the center by default Display 9 renderer.setlabelstextsize (20);//The font size of the marked text on the pie chart is//renderer.setlabelscolor (color.white);//The label text on the pie chart           Color one by one renderer.setpanenabled (false);//Set Whether you can pan//renderer.setdisplayvalues (true);//Whether the value 13 is displayed Renderer.setclickenabled (TRUE);//settings can be clicked on Renderer.setmargins (new int[] {15,0}); -an array containing the margin size values, in this order:top, left, bottom, right16 for (int color:colors) { Simpleseriesrenderer r = new Simpleseriesrenderer ();. SetColor (color); Renderer.addseriesrenderer (R);}21 return renderer;22} 

Method of setting renderer----bar chart

 1 int[] Colors={color.blue}; 2 xymultipleseriesrenderer renderer=buildbarrenderer (colors); 3 Type Type=type.default; 4 5//renderer.setzoomenabled (FALSE);//How did it fail----Use the following method 6 renderer.setzoomenabled (false, false); /successful Control--hehe 7 setchartsettings (renderer, "I am the title of the Histogram", "", "Statistical results", 0, 6, 0, 30000, Color.gray, Color.ltgray); 8 Renderer.getseriesrendererat (0). Setdisplaychartvalues (True);         9//renderer.getseriesrendererat (1). Setdisplaychartvalues (True), Renderer.setxlabels (0);//Setting the number of subscripts on the x-axis 11 Renderer.setylabels (10); Sets the number of subscripts on the y-axis, renderer.setxlabelsalign (align.right), Renderer.setylabelsalign (Align.left), and the//y axis numbers indicating the coordinates is the right renderer.setpanenabled (false, false);//sets whether to allow panning of the Renderer.addxtextlabel (2.0, "220kv power Line");//display at specified coordinates Text//Renderer.clearxtextlabels ();//Clear Labels17//renderer.setzoomrate (1.1f);//Set the ratio of renderer.         Setbarspacing (1f);//Set column spacing 19Renderer.setlabelstextsize (30);//Set the size of the number on the axis renderer.setxlabelsangle (300.0f);//Set the text rotation angle to the text clockwise rotation of RE Nderer.setxlabelspadding (10);//Set the distance between the text and the axis renderer.setfitlegend (true);//Adjust the appropriate position

1   protected Xymultipleseriesrenderer buildbarrenderer (int[] colors) {2             xymultipleseriesrenderer renderer = New Xymultipleseriesrenderer (); 3             renderer.setaxistitletextsize (4 renderer.setcharttitletextsize);             5             Renderer.setlabelstextsize (15); 6             renderer.setlegendtextsize; 7             int length = colors.length; 8 for             (int i = 0; i < length; i++) {9
   
    simpleseriesrenderer r = new Simpleseriesrenderer ();                 R.setcolor (Colors[i]);                 Renderer.addseriesrenderer (R);             }13             return renderer;14         }
   

Finally, put the Graphicalview into the specified layout.

1 layout= (LinearLayout) Findviewbyid (r.id.linearlayout), 2 layout.removeallviews (); 3 Layout.setbackgroundcolor ( Color.Black); 4 Layout.addview (Graphicalview, New Layoutparams (layoutparams.fill_parent,layoutparams.fill_parent)) ;

Effect

Use of the "Android" Achartengine Histogram and pie chart