Android利用HelloChart绘制曲线 Android利用HelloChart绘制曲线

本文实例为大家分享了Android利用HelloChart绘制曲线的具体代码，供大家参考，具体内容如下
1、将jar包放到app下的libs文件夹中
2、build.gradle(app)：

implementation files('libs\\hellocharts-library-1.5.8.jar')

3、MainActivity.java

package com.dj.drawlinestest; import android.graphics.Color; import android.os.Bundle; import android.os.Handler; import android.view.View; import androidx.appcompat.app.AppCompatActivity; import java.util.ArrayList; import java.util.LinkedList; import java.util.List; import java.util.Random; import lecho.lib.hellocharts.gesture.ContainerScrollType; import lecho.lib.hellocharts.gesture.ZoomType; import lecho.lib.hellocharts.model.Axis; import lecho.lib.hellocharts.model.AxisValue; import lecho.lib.hellocharts.model.Line; import lecho.lib.hellocharts.model.LineChartData; import lecho.lib.hellocharts.model.PointValue; import lecho.lib.hellocharts.model.ValueShape; import lecho.lib.hellocharts.model.Viewport; import lecho.lib.hellocharts.view.LineChartView; public class MainActivity extends AppCompatActivity {LineChartView lineChart; Random mRandom; Handler mHandler; MyRunnable mRunnable; DrawLinesUtil mDrawLinesUtil; @Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mRandom = new Random(); lineChart = findViewById(R.id.LineChart); mDrawLinesUtil = new DrawLinesUtil(lineChart); mRunnable = new MyRunnable(); mHandler = new Handler(); mHandler.postDelayed(mRunnable, 0); }private class MyRunnable implements Runnable {@Overridepublic void run() {Integer number = Math.abs(mRandom.nextInt()) % 50 + 50; mDrawLinesUtil.updateLocNumList(number); mDrawLinesUtil.display_chart(); mHandler.postDelayed(this, 1000); }}}

4、activity_main.xml

5、工具类：
DrawLinesUtil.java

package com.dj.drawlinestest; import android.graphics.Color; import android.view.View; import java.util.ArrayList; import java.util.LinkedList; import java.util.List; import lecho.lib.hellocharts.gesture.ContainerScrollType; import lecho.lib.hellocharts.gesture.ZoomType; import lecho.lib.hellocharts.model.Axis; import lecho.lib.hellocharts.model.AxisValue; import lecho.lib.hellocharts.model.Line; import lecho.lib.hellocharts.model.LineChartData; import lecho.lib.hellocharts.model.PointValue; import lecho.lib.hellocharts.model.ValueShape; import lecho.lib.hellocharts.model.Viewport; import lecho.lib.hellocharts.view.LineChartView; public class DrawLinesUtil {LineChartView lineChart; private boolean inited; private int pointNumber; private List mPointValues ; private ListmAxisXValues ; private ListmLocNumList; /*** 构造函数* @param lineChart*/public DrawLinesUtil(LineChartView lineChart) {this.lineChart = lineChart; this.inited = false; this.pointNumber = 60; // +默认显示60个点this.mPointValues= new ArrayList<>(); // 数据点this.mAxisXValues= new ArrayList<>(); // X轴标注this.mLocNumList= new LinkedList<>(); // 数据源}/*** setget* @return*/public int getPointNumber() {return pointNumber; }public void setPointNumber(int pointNumber) {this.pointNumber = pointNumber; }public LineChartView getLineChart() {return lineChart; }public void setLineChart(LineChartView lineChart) {this.lineChart = lineChart; }public List getLocNumList() {return mLocNumList; }/*** 供外部调用添加数据* @param number*/public void updateLocNumList(Integer number){if (mLocNumList.size() >= pointNumber) {mLocNumList.remove(0); }mLocNumList.add(number); }/*** 供外部调用画曲线*/public void display_chart(){if( ! inited ){setAttribute(); }getXLables(); getPoints(); draw_linechart(); }/*** 设置行为属性，支持缩放、滑动以及平移*/private void setAttribute(){lineChart.setInteractive(true); lineChart.setZoomType(ZoomType.HORIZONTAL); lineChart.setMaxZoom((float) 2); //最大方法比例lineChart.setContainerScrollEnabled(true, ContainerScrollType.HORIZONTAL); lineChart.setVisibility(View.GONE); inited = true; }/*** 设置X轴的显示*/private void getXLables(){mAxisXValues.clear(); for (int i = 0; i < mLocNumList.size(); i++) {mAxisXValues.add(new AxisValue(i).setLabel("")); //这里设置x轴的内容}}/*** 图表的每个点的显示*/private void getPoints() {mPointValues.clear(); //Log.v(TAG,"getPoints"+mLocNumList.size()); for (int i = 0; i < mLocNumList.size(); i++) {mPointValues.add(new PointValue(i, mLocNumList.get(i))); }}/*** 内部方法画曲线*/private void draw_linechart(){Line line = new Line(mPointValues).setColor(Color.parseColor("#FFCD41")); //("#FFCD41")); //折线的颜色（橙色）List lines = new ArrayList<>(); line.setShape(ValueShape.CIRCLE); //折线图上每个数据点的形状这里是圆形（有三种：ValueShape.SQUAREValueShape.CIRCLEValueShape.DIAMOND）line.setCubic(true); //曲线是否平滑，即是曲线还是折线line.setFilled(true); //是否填充曲线的面积line.setHasLabels(false); //曲线的数据坐标是否加上备注line.setHasLabelsOnlyForSelected(true); //点击数据坐标提示数据（设置了这个line.setHasLabels(true); 就无效）line.setHasLines(true); //是否用线显示。如果为false 则没有曲线只有点显示line.setHasPoints(true); //是否显示圆点如果为false 则没有原点只有点显示（每个数据点都是个大的圆点）line.setPointRadius(3); lines.add(line); LineChartData data = https://www.it610.com/article/new LineChartData(); data.setLines(lines); //坐标轴Axis axisX = new Axis(); //X轴axisX.setTextSize(0); //设置字体大小//axisX.setMaxLabelChars(20); //最多几个X轴坐标，意思就是你的缩放让X轴上数据的个数7<=x<=mAxisXValues.lengthaxisX.setValues(mAxisXValues); //填充X轴的坐标名称data.setAxisXBottom(axisX); //x 轴在底部//data.setAxisXTop(axisX); //x 轴在顶部// axisX.setHasLines(true); //x 轴分割线// Y轴是根据数据的大小自动设置Y轴上限(在下面我会给出固定Y轴数据个数的解决方案)Axis axisY = new Axis(); //Y轴axisY.setName(""); //y轴标注axisY.setTextSize(8); //设置字体大小data.setAxisYLeft(axisY); //Y轴设置在左边//axisY.setHasLines(true); //Y轴分割线//设置行为属性，支持缩放、滑动以及平移lineChart.setInteractive(true); lineChart.setZoomType(ZoomType.HORIZONTAL); lineChart.setMaxZoom((float) 2); //最大方法比例lineChart.setContainerScrollEnabled(true, ContainerScrollType.HORIZONTAL); lineChart.setLineChartData(data); lineChart.setVisibility(View.VISIBLE); Viewport v2 = new Viewport(lineChart.getMaximumViewport()); v2.top= 100; v2.bottom = 0; if (mLocNumList.size()>24) {lineChart.setMaximumViewport(v2); Viewport v = new Viewport(lineChart.getMaximumViewport()); v.left = mLocNumList.size() - 24-1; lineChart.setCurrentViewport(v); }else{v2.right= 24; lineChart.setMaximumViewport(v2); lineChart.setCurrentViewport(v2); }}}

【Android利用HelloChart绘制曲线】以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。