Android 统计图表引擎AChartEngine(四) - 源码示例嵌入Acitivity中的折线图 - android

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。

Android 统计图表引擎AChartEngine(四) - 源码示例嵌入Acitivity中的折线图_第1张图片

XYChartBuilder.java(源码分析见注释)

[java] view plain copy

packageorg.achartengine.chartdemo.demo.chart;
importjava.io.File;
importjava.io.FileOutputStream;
importorg.achartengine.ChartFactory;
importorg.achartengine.GraphicalView;
importorg.achartengine.chart.PointStyle;
importorg.achartengine.chartdemo.demo.R;
importorg.achartengine.model.SeriesSelection;
importorg.achartengine.model.XYMultipleSeriesDataset;
importorg.achartengine.model.XYSeries;
importorg.achartengine.renderer.XYMultipleSeriesRenderer;
importorg.achartengine.renderer.XYSeriesRenderer;
importorg.achartengine.tools.PanListener;
importorg.achartengine.tools.ZoomEvent;
importorg.achartengine.tools.ZoomListener;
importandroid.app.Activity;
importandroid.graphics.Bitmap;
importandroid.graphics.Bitmap.CompressFormat;
importandroid.graphics.Color;
importandroid.os.Bundle;
importandroid.os.Environment;
importandroid.view.View;
importandroid.view.ViewGroup.LayoutParams;
importandroid.widget.Button;
importandroid.widget.EditText;
importandroid.widget.LinearLayout;
importandroid.widget.Toast;
publicclassXYChartBuilderextendsActivity{
publicstaticfinalStringTYPE="type";
privateXYMultipleSeriesDatasetmDataset=newXYMultipleSeriesDataset();
privateXYMultipleSeriesRenderermRenderer=newXYMultipleSeriesRenderer();
privateXYSeriesmCurrentSeries;
privateXYSeriesRenderermCurrentRenderer;
privateStringmDateFormat;
privateButtonmNewSeries;
privateButtonmAdd;
privateEditTextmX;
privateEditTextmY;
privateGraphicalViewmChartView;
privateintindex=0;
@Override
protectedvoidonRestoreInstanceState(BundlesavedState){
super.onRestoreInstanceState(savedState);
mDataset=(XYMultipleSeriesDataset)savedState.getSerializable("dataset");
mRenderer=(XYMultipleSeriesRenderer)savedState.getSerializable("renderer");
mCurrentSeries=(XYSeries)savedState.getSerializable("current_series");
mCurrentRenderer=(XYSeriesRenderer)savedState.getSerializable("current_renderer");
mDateFormat=savedState.getString("date_format");
}
@Override
protectedvoidonSaveInstanceState(BundleoutState){
super.onSaveInstanceState(outState);
outState.putSerializable("dataset",mDataset);
outState.putSerializable("renderer",mRenderer);
outState.putSerializable("current_series",mCurrentSeries);
outState.putSerializable("current_renderer",mCurrentRenderer);
outState.putString("date_format",mDateFormat);
}
@Override
protectedvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.xy_chart);
mX=(EditText)findViewById(R.id.xValue);
mY=(EditText)findViewById(R.id.yValue);
mRenderer.setApplyBackgroundColor(true);//设置是否显示背景色
mRenderer.setBackgroundColor(Color.argb(100,50,50,50));//设置背景色
mRenderer.setAxisTitleTextSize(16);//设置轴标题文字的大小
mRenderer.setChartTitleTextSize(20);//?设置整个图表标题文字大小
mRenderer.setLabelsTextSize(15);//设置刻度显示文字的大小(XY轴都会被设置)
mRenderer.setLegendTextSize(15);//图例文字大小
mRenderer.setMargins(newint[]{30,70,0,10});//设置图表的外边框(上/左/下/右)
mRenderer.setZoomButtonsVisible(true);//是否显示放大缩小按钮
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)
mAdd=(Button)findViewById(R.id.add);
mNewSeries=(Button)findViewById(R.id.new_series);
mNewSeries.setOnClickListener(newView.OnClickListener(){
publicvoidonClick(Viewv){
StringseriesTitle="Series"+(mDataset.getSeriesCount()+1);//图例
XYSeriesseries=newXYSeries(seriesTitle);//定义XYSeries
mDataset.addSeries(series);//在XYMultipleSeriesDataset中添加XYSeries
mCurrentSeries=series;//设置当前需要操作的XYSeries
XYSeriesRendererrenderer=newXYSeriesRenderer();//定义XYSeriesRenderer
mRenderer.addSeriesRenderer(renderer);//将单个XYSeriesRenderer增加到XYMultipleSeriesRenderer
renderer.setPointStyle(PointStyle.CIRCLE);//点的类型是圆形
renderer.setFillPoints(true);//设置点是否实心
mCurrentRenderer=renderer;
setSeriesEnabled(true);
}
});
//增加一个点后重画图
mAdd.setOnClickListener(newView.OnClickListener(){
publicvoidonClick(Viewv){
doublex=0;
doubley=0;
try{
x=Double.parseDouble(mX.getText().toString());
}catch(NumberFormatExceptione){
//TODO
mX.requestFocus();
return;
}
try{
y=Double.parseDouble(mY.getText().toString());
}catch(NumberFormatExceptione){
//TODO
mY.requestFocus();
return;
}
mCurrentSeries.add(x,y);
mX.setText("");
mY.setText("");
mX.requestFocus();
if(mChartView!=null){
mChartView.repaint();//重画图表
}
//生成图片保存,注释掉下面的代码不影响图表的生成.
//-->start
Bitmapbitmap=mChartView.toBitmap();
try{
Filefile=newFile(Environment.getExternalStorageDirectory(),"test"+index+++".png");
FileOutputStreamoutput=newFileOutputStream(file);
bitmap.compress(CompressFormat.PNG,100,output);
}catch(Exceptione){
e.printStackTrace();
}
//-->end
}
});
}
@Override
protectedvoidonResume(){
super.onResume();
if(mChartView==null){
LinearLayoutlayout=(LinearLayout)findViewById(R.id.chart);
mChartView=ChartFactory.getLineChartView(this,mDataset,mRenderer);
mRenderer.setClickEnabled(true);//设置图表是否允许点击
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)
mChartView.setOnClickListener(newView.OnClickListener(){
@Override
publicvoidonClick(Viewv){
//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.
//-->start
SeriesSelectionseriesSelection=mChartView.getCurrentSeriesAndPoint();
double[]xy=mChartView.toRealPoint(0);
if(seriesSelection==null){
Toast.makeText(XYChartBuilder.this,"Nochartelementwasclicked",Toast.LENGTH_SHORT)
.show();
}else{
Toast.makeText(
XYChartBuilder.this,
"Chartelementinseriesindex"+seriesSelection.getSeriesIndex()
+"datapointindex"+seriesSelection.getPointIndex()+"wasclicked"
+"closestpointvalueX="+seriesSelection.getXValue()+",Y="+seriesSelection.getValue()
+"clickedpointvalueX="+(float)xy[0]+",Y="+(float)xy[1],Toast.LENGTH_SHORT).show();
}
//-->end
}
});
mChartView.setOnLongClickListener(newView.OnLongClickListener(){
@Override
publicbooleanonLongClick(Viewv){
SeriesSelectionseriesSelection=mChartView.getCurrentSeriesAndPoint();
if(seriesSelection==null){
Toast.makeText(XYChartBuilder.this,"Nochartelementwaslongpressed",
Toast.LENGTH_SHORT);
returnfalse;//nochartelementwaslongpressed,soletsomething
//elsehandletheevent
}else{
Toast.makeText(XYChartBuilder.this,"Chartelementinseriesindex"
+seriesSelection.getSeriesIndex()+"datapointindex"
+seriesSelection.getPointIndex()+"waslongpressed",Toast.LENGTH_SHORT);
returntrue;//theelementwaslongpressed-theeventhasbeen
//handled
}
}
});
//这段代码处理放大缩小
//-->start
mChartView.addZoomListener(newZoomListener(){
publicvoidzoomApplied(ZoomEvente){
Stringtype="out";
if(e.isZoomIn()){
type="in";
}
System.out.println("Zoom"+type+"rate"+e.getZoomRate());
}
publicvoidzoomReset(){
System.out.println("Reset");
}
},true,true);
//-->end
//设置拖动图表时后台打印出图表坐标的最大最小值.
mChartView.addPanListener(newPanListener(){
publicvoidpanApplied(){
System.out.println("NewXrange=["+mRenderer.getXAxisMin()+","+mRenderer.getXAxisMax()
+"],Yrange=["+mRenderer.getYAxisMax()+","+mRenderer.getYAxisMax()+"]");
}
});
layout.addView(mChartView,newLayoutParams(LayoutParams.FILL_PARENT,
LayoutParams.FILL_PARENT));
booleanenabled=mDataset.getSeriesCount()>0;
setSeriesEnabled(enabled);
}else{
mChartView.repaint();
}
}
privatevoidsetSeriesEnabled(booleanenabled){
mX.setEnabled(enabled);
mY.setEnabled(enabled);
mAdd.setEnabled(enabled);
}
}

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