Android LineChart绘制多条曲线的方法

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="wrap_content"
 android:layout_height="40dp"
 android:background="@drawable/marker2" >
 
 <TextView
 android:id="@+id/tvContent"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_centerHorizontal="true"
 android:layout_marginTop="7dp"
 android:layout_marginLeft="5dp"
 android:layout_marginRight="5dp"
 android:text=""
 android:textSize="12dp"
 android:textColor="@android:color/white"
 android:ellipsize="end"
 android:singleLine="true"
 android:textAppearance="?android:attr/textAppearanceSmall" />
 
</RelativeLayout>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tools="http://schemas.android.com/tools"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:paddingBottom="10dp"
 android:paddingLeft="10dp"
 android:paddingRight="10dp"
 android:paddingTop="10dp"
 tools:context=".MainActivity" >
 
 <com.github.mikephil.charting.charts.LineChart
 android:id="@+id/chartTall"
 android:layout_width="match_parent"
 android:layout_height="400dp"
 android:layout_marginTop="20dp" />
 
 
</RelativeLayout>

package com.example.weixu.drawline;
 
import android.content.Context;
import android.widget.TextView;
 
import com.github.mikephil.charting.data.CandleEntry;
import com.github.mikephil.charting.data.Entry;
import com.github.mikephil.charting.utils.MarkerView;
import com.github.mikephil.charting.utils.Utils;
 
public class MyMarkerView extends MarkerView {
 
 private TextView tvContent;
 
 public MyMarkerView(Context context, int layoutResource) {
 super(context, layoutResource);
 
 tvContent = (TextView) findViewById(R.id.tvContent);
 }
 
 @Override
 public void refreshContent(Entry e, int dataSetIndex) {
 
 if (e instanceof CandleEntry) {
 CandleEntry ce = (CandleEntry) e;
 tvContent.setText("" + Utils.formatNumber(ce.getHigh(), 0, true));
 } else {
 tvContent.setText("" +e.getVal());
 }
 }
}

package com.example.weixu.drawline;
 
import java.util.ArrayList;
 
import android.app.Activity;
import android.graphics.Color;
import android.graphics.Typeface;
import android.os.Bundle;
import android.view.WindowManager;
 
import com.github.mikephil.charting.charts.BarLineChartBase;
import com.github.mikephil.charting.charts.BarLineChartBase.BorderPosition;
import com.github.mikephil.charting.charts.LineChart;
import com.github.mikephil.charting.data.Entry;
import com.github.mikephil.charting.data.LineData;
import com.github.mikephil.charting.data.LineDataSet;
import com.github.mikephil.charting.utils.Legend;
import com.github.mikephil.charting.utils.Legend.LegendForm;
import com.github.mikephil.charting.utils.XLabels;
import com.github.mikephil.charting.utils.XLabels.XLabelPosition;
import com.github.mikephil.charting.utils.YLabels;
 
public class MainActivity extends Activity {
 
 private LineChart chartTall;
 
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
 WindowManager.LayoutParams.FLAG_FULLSCREEN);
 setContentView(R.layout.activity_main);
 
 chartTall = (LineChart) findViewById(R.id.chartTall);
 
 setType();
 
 // 刷新图表
 chartTall.invalidate();
 }
 
 private void setType() {
 // 设置在Y轴上是否是从0开始显示
 chartTall.setStartAtZero(true);
 //是否在Y轴显示数据，就是曲线上的数据
 chartTall.setDrawYValues(true);
 //设置网格
 chartTall.setDrawBorder(true);
 chartTall.setBorderPositions(new BarLineChartBase.BorderPosition[] {
 BorderPosition.BOTTOM});
 //在chart上的右下角加描述
 chartTall.setDescription("身高曲线图");
 //设置Y轴上的单位
 chartTall.setUnit("cm");
 //设置透明度
 chartTall.setAlpha(0.8f);
 //设置网格底下的那条线的颜色
 chartTall.setBorderColor(Color.rgb(213, 216, 214));
 //设置Y轴前后倒置
 chartTall.setInvertYAxisEnabled(false);
 //设置高亮显示
 chartTall.setHighlightEnabled(true);
 //设置是否可以触摸，如为false，则不能拖动，缩放等
 chartTall.setTouchEnabled(true);
 //设置是否可以拖拽，缩放
 chartTall.setDragEnabled(true);
 chartTall.setScaleEnabled(true);
 //设置是否能扩大扩小
 chartTall.setPinchZoom(true);
 //设置点击chart图对应的数据弹出标注
 MyMarkerView mv = new MyMarkerView(this, R.layout.custom_marker_view);
 mv.setOffsets(-mv.getMeasuredWidth() / 2, -mv.getMeasuredHeight());
 chartTall.setMarkerView(mv);
 chartTall.setHighlightIndicatorEnabled(false);
 //设置字体格式，如正楷
 Typeface tf = Typeface.createFromAsset(getAssets(),
 "OpenSans-Regular.ttf");
 chartTall.setValueTypeface(tf);
 
 XLabels xl = chartTall.getXLabels();
 xl.setPosition(XLabelPosition.BOTTOM); // 设置X轴的数据在底部显示
 xl.setTypeface(tf); // 设置字体
 xl.setTextSize(10f); // 设置字体大小
 xl.setSpaceBetweenLabels(3); // 设置数据之间的间距
 
 YLabels yl = chartTall.getYLabels();
 yl.setTypeface(tf); // 设置字体
 yl.setTextSize(10f); // s设置字体大小
 yl.setLabelCount(5); // 设置Y轴最多显示的数据个数
 // 加载数据
 setData();
 //从X轴进入的动画
 chartTall.animateX(4000);
 chartTall.animateY(3000); //从Y轴进入的动画
 chartTall.animateXY(3000, 3000); //从XY轴一起进入的动画
 
 //设置最小的缩放
 chartTall.setScaleMinima(0.5f, 1f);
 
 }
 
 private void setData() {
 String[] babAge = {"0","1","2","3","4","5","6"}; //连线的x轴数据
 String[] babyTall = {"50","60","90","110","130","135","140"};
 String[] usuaTall = {"55","65","95","115","125","135","145"};//连线的y轴数据
 
 LineData data=new LineData(babAge,setLine(babAge,babyTall,1,"宝宝身高")); //创建LineData实体类并添加第一条曲线
 data.addDataSet(setLine(babAge,usuaTall,2,"正常身高")); //添加第二条曲线
 chartTall.setData(data);
 }
 
 //画线
 private LineDataSet setLine(String[] babAge, String[] Tall,int flag,String name) {
 ArrayList<String> xValsAge = new ArrayList<String>();
 for (int i = 0; i < babAge.length; i++) {
 xValsAge.add(babAge[i]);
 }
 ArrayList<Entry> yValsBabyTall = new ArrayList<Entry>();
 for (int i = 0; i < Tall.length; i++) {
 yValsBabyTall.add(new Entry(Float.parseFloat(Tall[i]), i));
 }
 //设置baby的成长曲线
 LineDataSet setData = new LineDataSet(yValsBabyTall,name);
 setData.setDrawCubic(true); //设置曲线为圆滑的线
 setData.setCubicIntensity(0.2f);
 setData.setDrawFilled(false); //设置包括的范围区域填充颜色
 setData.setDrawCircles(true); //设置有圆点
 setData.setLineWidth(2f); //设置线的宽度
 setData.setCircleSize(5f); //设置小圆的大小
 setData.setHighLightColor(Color.rgb(244, 117, 117));
 //设置曲线颜色
 if(flag==1)
 setData.setColor(Color.rgb(104, 241, 175)); //宝宝身高曲线颜色
 else if(flag==2)
 setData.setColor(Color.rgb(255, 0, 0)); //普通身高曲线颜色
 return setData; //返回曲线
 }
}