我做了这样的事情:: 对于静态数据
public class MainActivity extends Activity {
final Calendar c = Calendar.getInstance();
int mMinute = c.get(Calendar.MINUTE);
int mHour = c.get(Calendar.HOUR_OF_DAY);
int am =c.get(Calendar.AM_PM);
int[] x =new int[1920];
int[] sleep = {4,3,2,1,4,3,2,1,4,3,2,1,4,1,1,1,4,4,2,2,2,3,3,2,2,2,2,2,1,1,1,1,1,1,4,2,2,2,2,2,2,2,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,2};
public String getnext(int a)
{
String ap;
if(am==1){ap="PM";}
else{ap="AM";}
String s= mHour+" "+ap;
mMinute=mMinute+5;
if (mHour >=12){
mHour=mHour-12;
switch(am){case 0:am=1; break; case 1:am=0;break;}
}
if(mMinute >= 60)
{
mHour= mHour+1;
mMinute=mMinute-60;
}
//Log.d("Gr","mMinute: "+mMinute);
if(mMinute==1 | mMinute==2 | mMinute==3 |mMinute==4 | mMinute==0)
{s= mHour+" "+ap;}
else{s="";}
return (s);}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// setContentView(R.layout.activity_main);
openChart();
}
private void openChart(){
XYSeries sleepSeries = new XYSeries("Sleep");
for(int i=0;i<sleep.length;i++){
sleepSeries.add(i,sleep[i]);
}
// Creating a dataset to hold each series
XYMultipleSeriesDataset dataset = new XYMultipleSeriesDataset();
// Adding Income Series to the dataset
dataset.addSeries(sleepSeries);
// Creating XYSeriesRenderer to customize incomeSeries
XYSeriesRenderer sleepRenderer = new XYSeriesRenderer();
sleepRenderer.setColor(Color.GREEN);
sleepRenderer.setFillPoints(true);
sleepRenderer.setLineWidth((float) .2);
// Creating a XYMultipleSeriesRenderer to customize the whole chart
XYMultipleSeriesRenderer multiRenderer = new XYMultipleSeriesRenderer();
multiRenderer.setXLabels(0);
multiRenderer.setYAxisMin(0);
multiRenderer.setYLabels(0);
multiRenderer.setYAxisMax(4);
multiRenderer.setChartTitle("Sleep vs Time");
multiRenderer.setBarSpacing(.5);
//multiRenderer.setZoomButtonsVisible(true);
multiRenderer.setLegendHeight((int) 5);
multiRenderer.setPanEnabled(true, false);
multiRenderer.addSeriesRenderer(sleepRenderer);
// Creating an intent to plot bar chart using dataset and multipleRenderer
Intent intent = ChartFactory.getBarChartIntent(getBaseContext(), dataset, renderer, Type.DEFAULT);
// Start Activity
startActivity(intent);
}
我有像这样的图表
更新:::
对于实时数据,更新系列如
static ArrayList<Integer> sleep = new ArrayList<Integer>();
当 newval 可用时
sleep.add(newval);
然后打电话openChart();
在第一个清晰的数据集中(dataset.clear();
)
然后打电话repaint();