PieChart of AChartEngine application (pie chart)

PieChart of AChartEngine application (pie chart)

The steps for creating a pie chart are as follows: Introduce the AChartEngine dependent jar package in the project and add the following in Manifest: <activityandroid: name = "org. achartengine. graphicalActivity "/>

1. Set DefaultRenderer

DefaultRenderer mRenderer = new DefaultRenderer (); // The main descriptor of PieChart MRenderer. setZoomButtonsVisible (true); // The zoom in/out button is displayed. MRenderer. setStartAngle (180); // set it to start horizontally. MRenderer. setDisplayValues (true); // display data MRenderer. setFitLegend (true); // you can specify whether the legend is displayed. MRenderer. setLegendTextSize (10); // set the font size of the legend. MRenderer. setLegendHeight (10); // sets the legend height. MRenderer. setChartTitle ("pie chart example"); // you can specify the title of a pie chart. MRenderer. setChartTitleTextSize (14); // you can specify the title size of a pie chart.

 

2. Construct the data source CategorySeries

For (int I = 0; I <data. length; I ++) VALUE + = data [I]; For (int I = 0; I <data. length; I ++ ){ MSeries. add ("example" + (I + 1), data [I]/VALUE); // set the type name and corresponding value. The preceding VALUE is a key-value pair. SimpleSeriesRenderer renderer = new SimpleSeriesRenderer (); If (I <COLORS. length ){ Renderer. setColor (COLORS [I]); // you can specify the color of the descriptor. } Else { Renderer. setColor (getRandomColor (); // you can specify the color of the descriptor. } Renderer. setChartValuesFormat (NumberFormat. getPercentInstance (); // set the percentage MRenderer. setChartTitleTextSize (14); // you can specify the title size of a pie chart. MRenderer. addSeriesRenderer (renderer); // Add the latest descriptor to DefaultRenderer }

 

3. Use ChartFactory to obtain the pie chart

MChartView = ChartFactory. getPieChartView (getApplicationContext (), MSeries, mRenderer); // build mChartView MRenderer. setClickEnabled (true); // click an event MChartView. setOnClickListener (new View. OnClickListener () {// content }

Run:

Code

Package com. qiuzhping. achart; import java. text. numberFormat; import java. util. random; import org. achartengine. chartFactory; import org. achartengine. graphicalView; import org. achartengine. model. categorySeries; import org. achartengine. model. seriesSelection; import org. achartengine. renderer. defaultRenderer; import org. achartengine. renderer. simpleSeriesRenderer; import android. app. activity; import android. graphics. color; import android. OS. bundle; import android. view. view; import android. view. viewGroup. layoutParams; import android. widget. linearLayout; import android. widget. toast;/*** @ Project name: AChart * @ Class Name: PieChartBuilder * @ Author: Qiuzhping * @ time: 11:20:48 * @ role: Build a pie chart, and generate interaction with the user. Click the corresponding area to correctly display the information */public class PieChartBuilder extends Activity {private static int [] COLORS = new int [] {Color. RED, Color. GREEN, Color. BLUE, Color. MAGENTA, Color. CYAN, Color. YELLOW, Color. DKGRAY}; double data [] = new double [] {20, 30, 40, 50, 60, 70, 80, 90,100 }; private CategorySeries mSeries = new CategorySeries (""); // The DataSet of PieChart is actually some key-value pairs, which are similar to the use of Map private DefaultRenderer mRenderer = new DefaultRenderer (); // The main descriptor of PieChart is private GraphicalView mChartView; // you need to add // <activity // android: name = "org. achartengine. graphicalActivity "//> private LinearLayout mLinear; private static double VALUE = 0; // total @ Overrideprotected void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. xy_chart); mLinear = (LinearLayout) findViewById (R. id. chart); mLinear. setBackgroundColor (Color. BLACK); mRenderer. setZoomButtonsVisible (true); // display the zoom-in and zoom-out button mRenderer. setStartAngle (180); // set it to start horizontally. setDisplayValues (true); // displays the data mRenderer. setFitLegend (true); // sets whether to display the legend mRenderer. setLegendTextSize (10); // set the font size of the legend mRenderer. setLegendHeight (10); // set the legend height mRenderer. setChartTitle ("pie chart example"); // set the pie chart title for (int I = 0; I <data. length; I ++) VALUE + = data [I]; for (int I = 0; I <data. length; I ++) {mSeries. add ("example" + (I + 1), data [I]/VALUE); // set the type name and the corresponding value. The preceding VALUE is (key, value) key-Value Pair SimpleSeriesRenderer renderer = new SimpleSeriesRenderer (); if (I <COLORS. length) {renderer. setColor (COLORS [I]); // sets the color of the descriptor} else {renderer. setColor (getRandomColor (); // sets the color of the descriptor} renderer. setChartValuesFormat (NumberFormat. getPercentInstance (); // sets the percentage of mRenderer. setChartTitleTextSize (14); // set the title size of the pie chart mRenderer. addSeriesRenderer (renderer); // Add the latest descriptor to DefaultRenderer.} if (mChartView = null) {// null, You need to obtain PieChartViewmChartView = ChartFactory from ChartFactory. getPieChartView (getApplicationContext (), mSeries, mRenderer); // construct mChartViewmRenderer. setClickEnabled (true); // Click Event mChartView. setOnClickListener (new View. onClickListener () {// content @ Overridepublic void onClick (View v) {SeriesSelection seriesSelection = mChartView. getCurrentSeriesAndPoint (); // obtain the current category and pointer if (seriesSelection = null) {Toast. makeText (getApplicationContext (), "You have not selected data", Toast. LENGTH_SHORT ). show () ;}else {for (int I = 0; I <mSeries. getItemCount (); I ++) {mRenderer. getSeriesRendererAt (I ). setHighlighted (I = seriesSelection. getPointIndex ();} mChartView. repaint (); Toast. makeText (getApplicationContext (), "The number you selected" + (seriesSelection. getPointIndex () + 1) + "item" + "%" + NumberFormat. getPercentInstance (). format (seriesSelection. getValue (), Toast. LENGTH_SHORT ). show () ;}}); mLinear. addView (mChartView, new LayoutParams (LayoutParams. FILL_PARENT, LayoutParams. FILL_PARENT);} else {mChartView. repaint () ;}} private int getRandomColor () {// generate the RBG value Random random = new Random (); int R = random. nextInt (255); int G = random. nextInt (255); int B = random. nextInt (255); return Color. rgb (R, G, B );}}

Corresponding project source code: http://download.csdn.net/detail/qiu_11/6853469

To be continued .......

CombinedXYChart(Statistical Chart)