问题
I have developed a application using a chart engine. and am using achartengine for drawing graphs. I have drawn a graph using time chart. here dates are coming on x-axis and values on y axis. When the input dates are too long ie, if one date is jan-10 and 2nd date is apr 12 then the line between two points doesn't showing. ![enter image description here][there is another point on date jan 10 is there when we scroll we can see that but the line between point is not showing]1
this is code
public View getChartView(long startDate,long currentDate,int visibility)
{
String titles = "New tickets";
Date[]dateList = new Date[dates.length];
for(int i=0;i<dates.length;i++)
{
dateList[i]=convertDateFromString(dates[i]);
}
int[] colors = new int[] { Color.GREEN};
PointStyle[] styles = new PointStyle[] { PointStyle.CIRCLE};
XYMultipleSeriesRenderer renderer = buildRenderer(colors, styles);
setChartSettings(renderer, "Project work status", "Date", "Tickets",startDate,
currentDate,yMin,yMax, Color.GRAY, Color.LTGRAY);
float textSize=context.getResources().getDimension(R.dimen.text_title_medium);
CustomTimeChart chart2 = new CustomTimeChart(
buildDateDataset(titles, dateList, values), renderer,context,visibility,textSize);
// TimeChart chart = new TimeChart(buildDateDataset(titles, dateList, values), renderer);
chart2.setDateFormat("dd,MMM");
final GraphicalView graphView = new GraphicalView(context, chart2);
graphView.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
SeriesSelection ss = graphView.getCurrentSeriesAndPoint();
if(ss!=null)
{
long clickedDateSeconds = (long) ss.getXValue();
Date clickedDate = new Date(clickedDateSeconds);
WeightTrackingActivity.dateCal.setTime(clickedDate);
WeightTrackingActivity.weight = ss.getValue();
try {
clickedDate=formatter.parse(clickedDate.toString());
} catch (ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if(clickedDate.before(Funcs.getCurrentDateInDate()))
WeightTrackingActivity.btnRecordWeight.setText("Update weight");
else
WeightTrackingActivity.btnRecordWeight.setText(WeightTrackingActivity.weightBtnText);
}
else
{
WeightTrackingActivity.btnRecordWeight.setText(WeightTrackingActivity.weightBtnText);
WeightTrackingActivity.dateCal.setTime(new Date());
}
}
});
return graphView;
}
protected void setChartSettings(XYMultipleSeriesRenderer renderer, String title, String xTitle,
String yTitle, double startDate, double currentDate, double yMin, double yMax, int axesColor,
int labelsColor) {
// renderer.setAxesColor(axesColor);
renderer.setApplyBackgroundColor(true);
renderer.setBackgroundColor(Color.WHITE);
renderer.setShowGrid(true);
renderer.setGridColor(Color.LTGRAY);
renderer.setShowLegend(false);
renderer.setMarginsColor(Color.WHITE);
// renderer.setPanEnabled(true, true);
renderer.setClickEnabled(true);
// renderer.setPanLimits(new double[]{yMin,yMax});
renderer.setZoomEnabled(true, false);
renderer.setLabelsTextSize(context.getResources().getDimension(R.dimen.text_title_medium));
renderer.setPointSize(5f);
renderer.setXAxisMin(startDate);
renderer.setXAxisMax(currentDate);
renderer.setXLabelsColor(Color.BLACK);
renderer.setXLabels(5);
renderer.setXLabelsPadding(2);
renderer.setYAxisMin(yMin);
renderer.setYAxisMax(yMax);
renderer.setYLabels(6);
renderer.setYLabelsColor(0, Color.WHITE);
renderer.setYLabelsAlign(Align.RIGHT);
renderer.setYLabelsPadding(2);
}
protected XYMultipleSeriesDataset buildDateDataset(String titles,Date[] xValues,
double[] yValues) {
XYMultipleSeriesDataset dataset = new XYMultipleSeriesDataset();
TimeSeries series = new TimeSeries(titles);
sortingValues(xValues,yValues);
for (int k = 0; k < xValues.length; k++) {
series.add(xValues[k], yValues[k]);
}
dataset.addSeries(series);
return dataset;
}
private void sortingValues(Date[] xValues, double[] yValues) {
for(int i=0;i<xValues.length;i++)
{
for(int j=0;j<xValues.length-1;j++)
{
if(xValues[i].before(xValues[j]))
{
Date d = xValues[i];
xValues[i]=xValues[j];
xValues[j]=d;
Double x=yValues[i];
yValues[i]=yValues[j];
yValues[j]=x;
}
}
}
}
protected XYMultipleSeriesRenderer buildRenderer(int[] colors, PointStyle[] styles) {
XYMultipleSeriesRenderer renderer = new XYMultipleSeriesRenderer();
setRenderer(renderer, colors, styles);
return renderer;
}
protected void setRenderer(XYMultipleSeriesRenderer renderer, int[] colors, PointStyle[] styles) {
renderer.setMargins(new int[] { 20, 40, 15, 20 });
int length = colors.length;
for (int i = 0; i < length; i++) {
XYSeriesRenderer r = new XYSeriesRenderer();
r.setColor(colors[i]);
r.setPointStyle(styles[i]);
r.setFillPoints(true);
r.setLineWidth(3);
r.setDisplayChartValues(true);
r.setChartValuesTextSize(context.getResources().getDimension(R.dimen.text_title_small));
r.setDisplayChartValuesDistance(2);
FillOutsideLine fillOutsideLine=new FillOutsideLine(FillOutsideLine.Type.BELOW);
fillOutsideLine.setColor(Color.parseColor("#A3E0FF"));
r.addFillOutsideLine(fillOutsideLine);
renderer.addSeriesRenderer(r);
}
}
private Date convertDateFromString(String date) {
Date dateConverted = new Date();
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");
try {
dateConverted = df.parse(date);
} catch ( ParseException e ) {
}
return dateConverted;
}
回答1:
you can turn hardware acceleration off
android:hardwareAccelerated="false"
to disable it for a particular view (This worked for me)
try:
View.setLayerType(View.LAYER_TYPE_SOFTWARE, null);
I've added this after rendering the graph but it should work everywhere.
来源：https://stackoverflow.com/questions/23244346/sometimes-line-doesnt-shows-on-the-graph-a-chartengine