我有一个使用AChartEngine库的条形图，如下所示：
public class MainActivity extends Activity {
private String[] mMonth = new String[] {
"Jan", "Feb" , "Mar", "Apr", "May", "Jun",
"Jul", "Aug" , "Sep", "Oct", "Nov", "Dec"
};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Getting reference to the button btn_chart
Button btnChart = (Button) findViewById(R.id.btn_chart);
// Defining click event listener for the button btn_chart
OnClickListener clickListener = new OnClickListener() {
@Override
public void onClick(View v) {
// Draw the Income vs Expense Chart
openChart();
}
};
// Setting event click listener for the button btn_chart of the MainActivity layout
btnChart.setOnClickListener(clickListener);
}
private void openChart(){
int[] x = { 0,1,2,3,4,5,6,7 };
int[] income = { 2000,2500,2700,3000,2800,3500,3700,3800};
int[] expense = {2200, 2700, 2900, 2800, 2600, 3000, 3300, 3400 };
// Creating an XYSeries for Income
//CategorySeries incomeSeries = new CategorySeries("Income");
XYSeries incomeSeries = new XYSeries("Income");
// Creating an XYSeries for Income
XYSeries expenseSeries = new XYSeries("Expense");
// Adding data to Income and Expense Series
for(int i=0;i<x.length;i++){
incomeSeries.add(i,income[i]);
expenseSeries.add(i,expense[i]);
}
// Creating a dataset to hold each series
XYMultipleSeriesDataset dataset = new XYMultipleSeriesDataset();
// Adding Income Series to the dataset
dataset.addSeries(incomeSeries);
// Adding Expense Series to dataset
dataset.addSeries(expenseSeries);
// Creating XYSeriesRenderer to customize incomeSeries
XYSeriesRenderer incomeRenderer = new XYSeriesRenderer();
incomeRenderer.setColor(Color.rgb(130, 130, 230));
incomeRenderer.setFillPoints(true);
incomeRenderer.setLineWidth(2);
incomeRenderer.setDisplayChartValues(true);
// Creating XYSeriesRenderer to customize expenseSeries
XYSeriesRenderer expenseRenderer = new XYSeriesRenderer();
expenseRenderer.setColor(Color.rgb(220, 80, 80));
expenseRenderer.setFillPoints(true);
expenseRenderer.setLineWidth(2);
expenseRenderer.setDisplayChartValues(true);
Calendar cal = Calendar.getInstance();
cal.clear(Calendar.HOUR);
// Creating a XYMultipleSeriesRenderer to customize the whole chart
XYMultipleSeriesRenderer multiRenderer = new XYMultipleSeriesRenderer();
multiRenderer.setXLabels(0);
multiRenderer.setChartTitle("Income vs Expense Chart");
multiRenderer.setXTitle("Year 2012");
multiRenderer.setYTitle("Amount in Dollars");
multiRenderer.setZoomButtonsVisible(true);
for(int i=0; i< x.length;i++){
multiRenderer.addXTextLabel(i, mMonth[i]);
}
// Adding incomeRenderer and expenseRenderer to multipleRenderer
// Note: The order of adding dataseries to dataset and renderers to multipleRenderer
// should be same
multiRenderer.addSeriesRenderer(incomeRenderer);
multiRenderer.addSeriesRenderer(expenseRenderer);
// Creating an intent to plot bar chart using dataset and multipleRenderer
Intent intent = ChartFactory.getBarChartIntent(getBaseContext(), dataset, multiRenderer, Type.DEFAULT);
// Start Activity
startActivity(intent);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
}
上面的代码图看起来像：
但我需要画一个具有以下属性的图：
X轴必须显示当前时间。如下图所示
有凌晨2点以上的吗
X轴上的每根棒为5分钟棒
每5分钟我发送一个数据，它应该根据
价值。
现在忽略y轴参数只需要如何绘制所需
X-AIXS
这张图是这样的：
最佳答案
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);
}
我得到的图形像
更新：：：
对于实时数据，更新序列如下
static ArrayList<Integer> sleep = new ArrayList<Integer>();
当newval可用时
sleep.add(newval);
然后在第一个清除数据集中调用
openChart();（dataset.clear();）然后致电
repaint();