安卓图表引擎AChartEngine - 源码示例嵌入Acitivity中的折线图.doc

安卓图表引擎AChartEngine安卓图表引擎AChartEngine(四) - 源码示例 嵌入Acitivity中的折线图 前面几篇博客中都是调用ChartFactory.get*Intent()方法，本节讲的内容调用ChartFactory.get*View()方法，这个方法调用的结果可以嵌入到任何一个Activity中，作为Activity的一部分。XYChartBuilder.java(源码分析见注释)java view plaincopy1. packageorg.achartengine.chartdemo.demo.chart;2. 3. importjava.io.File;4. importjava.io.FileOutputStream;5. 6. importorg.achartengine.ChartFactory;7. importorg.achartengine.GraphicalView;8. importorg.achartengine.chart.PointStyle;9. importorg.achartengine.chartdemo.demo.R;10. importorg.achartengine.model.SeriesSelection;11. importorg.achartengine.model.XYMultipleSeriesDataset;12. importorg.achartengine.model.XYSeries;13. importorg.achartengine.renderer.XYMultipleSeriesRenderer;14. importorg.achartengine.renderer.XYSeriesRenderer;15. importorg.achartengine.tools.PanListener;16. importorg.achartengine.tools.ZoomEvent;17. importorg.achartengine.tools.ZoomListener;18. 19. importandroid.app.Activity;20. importandroid.graphics.Bitmap;21. importandroid.graphics.Bitmap.CompressFormat;22. importandroid.graphics.Color;23. importandroid.os.Bundle;24. importandroid.os.Environment;25. importandroid.view.View;26. importandroid.view.ViewGroup.LayoutParams;27. importandroid.widget.Button;28. importandroid.widget.EditText;29. importandroid.widget.LinearLayout;30. importandroid.widget.Toast;31. 32. publicclassXYChartBuilderextendsActivity33. publicstaticfinalStringTYPE=type;34. 35. privateXYMultipleSeriesDatasetmDataset=newXYMultipleSeriesDataset();36. 37. privateXYMultipleSeriesRenderermRenderer=newXYMultipleSeriesRenderer();38. 39. privateXYSeriesmCurrentSeries;40. 41. privateXYSeriesRenderermCurrentRenderer;42. 43. privateStringmDateFormat;44. 45. privateButtonmNewSeries;46. 47. privateButtonmAdd;48. 49. privateEditTextmX;50. 51. privateEditTextmY;52. 53. privateGraphicalViewmChartView;54. 55. privateintindex=0;56. 57. Override58. protectedvoidonRestoreInstanceState(BundlesavedState)59. super.onRestoreInstanceState(savedState);60. mDataset=(XYMultipleSeriesDataset)savedState.getSerializable(dataset);61. mRenderer=(XYMultipleSeriesRenderer)savedState.getSerializable(renderer);62. mCurrentSeries=(XYSeries)savedState.getSerializable(current_series);63. mCurrentRenderer=(XYSeriesRenderer)savedState.getSerializable(current_renderer);64. mDateFormat=savedState.getString(date_format);65. 66. 67. Override68. protectedvoidonSaveInstanceState(BundleoutState)69. super.onSaveInstanceState(outState);70. outState.putSerializable(dataset,mDataset);71. outState.putSerializable(renderer,mRenderer);72. outState.putSerializable(current_series,mCurrentSeries);73. outState.putSerializable(current_renderer,mCurrentRenderer);74. outState.putString(date_format,mDateFormat);75. 76. 77. Override78. protectedvoidonCreate(BundlesavedInstanceState)79. super.onCreate(savedInstanceState);80. setContentView(R.layout.xy_chart);81. mX=(EditText)findViewById(R.id.xValue);82. mY=(EditText)findViewById(R.id.yValue);83. mRenderer.setApplyBackgroundColor(true);/设置是否显示背景色84. mRenderer.setBackgroundColor(Color.argb(100,50,50,50);/设置背景色85. mRenderer.setAxisTitleTextSize(16);/设置轴标题文字的大小86. mRenderer.setChartTitleTextSize(20);/?设置整个图表标题文字大小87. mRenderer.setLabelsTextSize(15);/设置刻度显示文字的大小(XY轴都会被设置)88. mRenderer.setLegendTextSize(15);/图例文字大小89. mRenderer.setMargins(newint30,70,0,10);/设置图表的外边框(上/左/下/右)90. mRenderer.setZoomButtonsVisible(true);/是否显示放大缩小按钮91. mRenderer.setPointSize(10);/设置点的大小(图上显示的点的大小和图例中点的大小都会被设置)92. mAdd=(Button)findViewById(R.id.add);93. mNewSeries=(Button)findViewById(R.id.new_series);94. mNewSeries.setOnClickListener(newView.OnClickListener()95. publicvoidonClick(Viewv)96. StringseriesTitle=Series+(mDataset.getSeriesCount()+1);/图例97. XYSeriesseries=newXYSeries(seriesTitle);/定义XYSeries98. mDataset.addSeries(series);/在XYMultipleSeriesDataset中添加XYSeries99. mCurrentSeries=series;/设置当前需要操作的XYSeries100. XYSeriesRendererrenderer=newXYSeriesRenderer();/定义XYSeriesRenderer101. mRenderer.addSeriesRenderer(renderer);/将单个XYSeriesRenderer增加到XYMultipleSeriesRenderer102. renderer.setPointStyle(PointStyle.CIRCLE);/点的类型是圆形103. renderer.setFillPoints(true);/设置点是否实心104. mCurrentRenderer=renderer;105. setSeriesEnabled(true);106. 107. );108. 109. /增加一个点后重画图110. mAdd.setOnClickListener(newView.OnClickListener()111. publicvoidonClick(Viewv)112. doublex=0;113. doubley=0;114. try115. x=Double.parseDouble(mX.getText().toString();116. catch(NumberFormatExceptione)117. /TODO118. mX.requestFocus();119. return;120. 121. try122. y=Double.parseDouble(mY.getText().toString();123. catch(NumberFormatExceptione)124. /TODO125. mY.requestFocus();126. return;127. 128. mCurrentSeries.add(x,y);129. mX.setText();130. mY.setText();131. mX.requestFocus();132. if(mChartView!=null)133. mChartView.repaint();/重画图表134. 135. /生成图片保存,注释掉下面的代码不影响图表的生成.136. /-start137. Bitmapbitmap=mChartView.toBitmap();138. try139. Filefile=newFile(Environment.getExternalStorageDirectory(),test+index+.png);140. FileOutputStreamoutput=newFileOutputStream(file);141. press(CompressFormat.PNG,100,output);142. catch(Exceptione)143. e.printStackTrace();144. 145. /-end146. 147. );148. 149. 150. Override151. protectedvoidonResume()152. super.onResume();153. if(mChartView=null)154. LinearLayoutlayout=(LinearLayout)findViewById(R.id.chart);155. mChartView=ChartFactory.getLineChartView(this,mDataset,mRenderer);156. mRenderer.setClickEnabled(true);/设置图表是否允许点击157. mRenderer.setSelectableBuffer(100);/设置点的缓冲半径值(在某点附件点击时,多大范围内都算点击这个点)158. mChartView.setOnClickListener(newView.OnClickListener()159. Override160. publicvoidonClick(Viewv)161. /这段代码处理点击一个点后,获得所点击的点在哪个序列中以及点的坐标.162. /-start163. SeriesSelectionseriesSelection=mChartView.getCurrentSeriesAndPoint();164. doublexy=mChartView.toRealPoint(0);165. if(seriesSelection=null)166. Toast.makeText(XYChartBuilder.this,Nochartelementwasclicked,Toast.LENGTH_SHORT)167. .show();168. else169. Toast.makeText(170. XYChartBuilder.this,171. Chartelementinseriesindex+seriesSelection.getSeriesIndex()172. +datapointindex+seriesSelection.getPointIndex()+wasclicked173. +closestpointvalueX=+seriesSelection.getXValue()+,Y=+seriesSelection.getValue()174. +clickedpointvalueX=+(float)xy0+,Y=+(float)xy1,Toast.LENGTH_SHORT).show();175. 176. /-end177. 178. );179. mChartView.setOnLongClickListener(newView.OnLongClickListener()180. Override181. publicbooleanonLongClick(Viewv)182. SeriesSelectionseriesSelection=mChartView.getCurrentSeriesAndPoint();183. if(seriesSelection=null)184. Toast.makeText(XYChartBuilder.this,Nochartelementwaslongpressed,185. Toast.LENGTH_SHORT);186. returnfalse;/nochartelementwaslongpressed,soletsomething187. /elsehandletheevent188. else189. Toast.makeText(XYChartBuilder.this,Chartelementinseriesindex190. +seriesSelection.getSeriesIndex()+datapointindex191. +seriesSelection.getPointIndex()+waslongpressed,Toast.LENGTH_SHORT);192. returntrue;/theelementwaslongpressed-theeventhasbeen193. /handled194. 195. 196. );197. /这段代码处理放大缩小198. /-start199. mChartView.addZoomListener(newZoomListener()200. publicvoidzoomApplied(ZoomEvente)201. Stringtype=out;202. if(e.isZoomIn()203. type=in;204. 205. Syste