Android图表控件MPAndroidChart——曲线图LineChart（多条曲线）动态添加数据
public class DynamicLineChartManager {
private LineChart lineChart;
private YAxis leftAxis;
private YAxis rightAxis;
private XAxis xAxis;
private LineData lineData;
private LineDataSet lineDataSet;
private List<ILineDataSet> lineDataSets = new ArrayList<>();
private SimpleDateFormat df = new SimpleDateFormat("HH:mm:ss");//设置日期格式
private List<String> timeList = new ArrayList<>(); //存储x轴的时间
//一条曲线
public DynamicLineChartManager(LineChart mLineChart, String name, int color) {
this.lineChart = mLineChart;
leftAxis = lineChart.getAxisLeft();
rightAxis = lineChart.getAxisRight();
xAxis = lineChart.getXAxis();
initLineChart();
initLineDataSet(name, color);
}
//多条曲线
public DynamicLineChartManager(LineChart mLineChart, List<String> names, List<Integer> colors) {
this.lineChart = mLineChart;
leftAxis = lineChart.getAxisLeft();
rightAxis = lineChart.getAxisRight();
xAxis = lineChart.getXAxis();
initLineChart();
initLineDataSet(names, colors);
}
/**
* 初始化LineChar
*/
private void initLineChart() {
lineChart.setDrawGridBackground(false);
//显示边界
lineChart.setDrawBorders(true);
//折线图例 标签 设置
Legend legend = lineChart.getLegend();
(.LINE);
(11f);
//显示位置
(.BOTTOM);
(.LEFT);
(.HORIZONTAL);
(false);
//X轴设置显示位置在底部
xAxis.setPosition(.BOTTOM);
xAxis.setGranularity(1f);
xAxis.setLabelCount(10);
xAxis.setValueFormatter(new IAxisValueFormatter() {
@Override
public String getFormattedValue(float value, AxisBase axis) {
return timeList.get((int) value % timeList.size());
}
});
//保证Y轴从0开始，不然会上移一点
leftAxis.setAxisMinimum(0f);
rightAxis.setAxisMinimum(0f);
}
/**
* 初始化折线(一条线)
*
* @param name
* @param color
*/
private void initLineDataSet(String name, int color) {
lineDataSet = new LineDataSet(null, name);
lineDataSet.setLineWidth(1.5f);
lineDataSet.setCircleRadius(1.5f);
lineDataSet.setColor(color);
lineDataSet.setCircleColor(color);
lineDataSet.setHighLightColor(color);
//设置曲线填充
lineDataSet.setDrawFilled(true);
lineDataSet.setAxisDependency(.LEFT);
lineDataSet.setValueTextSize(10f);
lineDataSet.setMode(.CUBIC_BEZIER);
//添加一个空的 LineData
lineData = new LineData();
lineChart.setData(lineData);
lineChart.invalidate();
}
/**
* 初始化折线（多条线）
*
* @param names
* @param colors
*/
private void initLineDataSet(List<String> names, List<Integer> colors) {
for (int i = 0; i < (); i++) {
lineDataSet = new LineDataSet(null, (i));
lineDataSet.setColor((i));
lineDataSet.setLineWidth(1.5f);
lineDataSet.setCircleRadius(1.5f);
lineDataSet.setColor((i));
lineDataSet.setDrawFilled(true);
lineDataSet.setCircleColor((i));
lineDataSet.setHighLightColor((i));
lineDataSet.setMode(.CUBIC_BEZIER);
lineDataSet.setAxisDependency(.LEFT);
lineDataSet.setValueTextSize(10f);
lineDataSets.add(lineDataSet);
}
//添加一个空的 LineData
lineData = new LineData();
lineChart.setData(lineData);
lineChart.invalidate();
}
/**
* 动态添加数据（一条折线图）
*
* @param number
*/
public void addEntry(int number) {
//最开始的时候才添加 lineDataSet（一个lineDataSet 代表一条线）
if (lineDataSet.getEntryCount() == 0) {
lineData.addDataSet(lineDataSet);
}
lineChart.setData(lineData);
//避免集合数据过多，及时清空（做这样的处理，并不知道有没有用，但还是这样做了）
if (timeList.size() > 11) {
timeList.clear();
}
timeList.add(df.format(System.currentTimeMillis()));
Entry entry = new Entry(lineDataSet.getEntryCount(), number);
lineData.addEntry(entry, 0);
//通知数据已经改变
lineData.notifyDataChanged();
lineChart.notifyDataSetChanged();
//设置在曲线图中显示的最大数量
lineChart.setVisibleXRangeMaximum(10);
//移到某个位置
lineChart.moveViewToX(lineData.getEntryCount() - 5);
}
/**
* 动态添加数据（多条折线图）
*
* @param numbers
*/
public void addEntry(List<Integer> numbers) {
if (lineDataSets.get(0).getEntryCount() == 0) {
lineData = new LineData(lineDataSets);
lineChart.setData(lineData);
}
if (timeList.size() > 11) {
timeList.clear();
}
timeList.add(df.format(System.currentTimeMillis()));
for (int i = 0; i < (); i++) {
Entry entry = new Entry(lineDataSet.getEntryCount(), (i));
lineData.addEntry(entry, i);
lineData.notifyDataChanged();
lineChart.notifyDataSetChanged();
lineChart.setVisibleXRangeMaximum(6);
lineChart.moveViewToX(lineData.getEntryCount() - 5);
}
}
/**
* 设置Y轴值
*
* @param max
* @param min
* @param labelCount
*/
public void setYAxis(float max, float min, int labelCount) {
if (max < min) {
return;
}
leftAxis.setAxisMaximum(max);
leftAxis.setAxisMinimum(min);
leftAxis.setLabelCount(labelCount, false);
rightAxis.setAxisMaximum(max);
rightAxis.setAxisMinimum(min);
rightAxis.setLabelCount(labelCount, false);
lineChart.invalidate();
}
/**
* 设置高限制线
*
* @param high
* @param name
*/
public void setHightLimitLine(float high, String name, int color) {
if (name == null) {
name = "高限制线";
}
LimitLine hightLimit = new LimitLine(high, name);
(4f);
(10f);
(color);
(color);
leftAxis.addLimitLine(hightLimit);
lineChart.invalidate();
}
/**
* 设置低限制线
*
* @param low
* @param name
*/
public void setLowLimitLine(int low, String name) {
if (name == null) {
name = "低限制线";
}
LimitLine hightLimit = new LimitLine(low, name);
(4f);
(10f);
leftAxis.addLimitLine(hightLimit);
lineChart.invalidate();
}
/**
* 设置描述信息
*
* @param str
*/
public void setDescription(String str) {
Description description = new Description();
(str);
lineChart.setDescription(description);
lineChart.invalidate();
}
}