完成体温折线图的绘制，用hallochert制作，
package com.example.myapplication;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import android.Manifest;
import android.app.Activity;
import android.content.pm.PackageManager;
import android.graphics.Color;
import android.os.Bundle;
import android.os.Environment;
import android.view.View;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Toast;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
//import org.apache.poi.xssf.usermodel.XSSFCell;
//import org.apache.poi.xssf.usermodel.XSSFRow;
//import org.apache.poi.xssf.usermodel.XSSFSheet;
//import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URI;
import java.util.ArrayList;
import java.util.List;
import lecho.lib.hellocharts.gesture.ZoomType;
import lecho.lib.hellocharts.listener.LineChartOnValueSelectListener;
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.util.ChartUtils;
import lecho.lib.hellocharts.view.LineChartView;
public class MainActivity extends AppCompatActivity {
private static final int REQUEST_EXTERNAL_STORAGE = 1;
private static String[] PERMISSIONS_STORAGE = {
Manifest.permission.READ_EXTERNAL_STORAGE,
Manifest.permission.WRITE_EXTERNAL_STORAGE };
private LineChartView chart; //显示线条的自定义View
private LineChartData data; // 折线图封装的数据类
private int numberOfLines = 1; //线条的数量
private int maxNumberOfLines = 1; //最大的线条数据
private int numberOfPoints = 12; //点的数量
float[][] randomNumbersTab = new float[maxNumberOfLines][numberOfPoints]; //二维数组，线的数量和点的数量
private boolean hasAxes = true; //是否有轴，x和y轴
private boolean hasAxesNames = true; //是否有轴的名字
private boolean hasLines = true; //是否有线（点和点连接的线）
private boolean hasPoints = true; //是否有点（每个值的点）
private ValueShape shape = ValueShape.CIRCLE; //点显示的形式，圆形，正方向，菱形
private boolean isFilled = false; //是否是填充
private boolean hasLabels = false; //每个点是否有名字
private boolean isCubic = false; //是否是立方的，线条是直线还是弧线
private boolean hasLabelForSelected = false; //每个点是否可以选择（点击效果）
private boolean pointsHaveDifferentColor; //线条的颜色变换
private boolean hasGradientToTransparent = false; //是否有梯度的透明
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
initData();
initEvent();
}
private void initView() {
//实例化
chart = (LineChartView) findViewById(R.id.chart);
}
private void initData()
{// Generate some random values.
generateValues(); //设置四条线的值数据
generateData(); //设置数据
// Disable viewport recalculations, see toggleCubic() method for more info.
chart.setViewportCalculationEnabled(false);
chart.setZoomType(ZoomType.HORIZONTAL);//设置线条可以水平方向收缩，默认是全方位缩放
resetViewport(); //设置折线图的显示大小
}
private void initEvent() {
chart.setOnValueTouchListener(new ValueTouchListener());
}
/**
* 图像显示大小
*/
private void resetViewport() {
// Reset viewport height range to (0,100)
final Viewport v = new Viewport(chart.getMaximumViewport());
v.bottom =0;
v.top =50;
v.left = 0;
v.right = numberOfPoints - 1;
chart.setMaximumViewport(v);
chart.setCurrentViewport(v);
}
/**
* 设置四条线条的数据
*/
private void generateValues() {
for (int i = 0; i < maxNumberOfLines; ++i) {
for (int j = 0; j < numberOfPoints; ++j) {
randomNumbersTab[i][j] = 100;
}
}
}
/**
* 配置数据
*/
private void generateData()
{
//存放线条对象的集合
List<Line> lines = new ArrayList<Line>();
//把数据设置到线条上面去
for (int i = 0; i < numberOfLines; ++i) {
List<PointValue> values = new ArrayList<PointValue>();
for (int j = 0; j < numberOfPoints; ++j) {
values.add(new PointValue(j, randomNumbersTab[i][j]));
}
Line line = new Line(values);
line.setColor(ChartUtils.COLORS[i]);
line.setShape(shape);
line.setCubic(isCubic);
line.setFilled(isFilled);
line.setHasLabels(hasLabels);
line.setHasLabelsOnlyForSelected(hasLabelForSelected);
line.setHasLines(hasLines);
line.setHasPoints(hasPoints);
// line.setHasGradientToTransparent(hasGradientToTransparent);
if (pointsHaveDifferentColor) {
line.setPointColor(ChartUtils.COLORS[(i + 1) % ChartUtils.COLORS.length]);
}
lines.add(line);
}
data = new LineChartData(lines);
if (hasAxes) {
Axis axisX = new Axis();
Axis axisY = new Axis().setHasLines(true);
if (hasAxesNames)
{
axisX.setTextColor(Color.BLACK);//设置x轴字体的颜色
axisY.setTextColor(Color.BLACK);//设置y轴字体的颜色
axisX.setName("Axis X");
axisY.setName("Axis Y");
}
data.setAxisXBottom(axisX);
data.setAxisYLeft(axisY);
} else {
data.setAxisXBottom(null);
data.setAxisYLeft(null);
}
data.setBaseValue(Float.NEGATIVE_INFINITY);
chart.setLineChartData(data);
}
/**
* 触摸监听类
*/
private class ValueTouchListener implements LineChartOnValueSelectListener {
@Override
public void onValueSelected(int lineIndex, int pointIndex, PointValue value) {
Toast.makeText(MainActivity.this, "Selected: " + value, Toast.LENGTH_SHORT).show();
}
@Override
public void onValueDeselected() {
}
}
// public void makeexcel()
// {
//// File file1 = new File("/data/data/com.example.seanfu/excel.xls");
//// if(file1.exists())
//// {
//// Toast.makeText(MainActivity.this,"存在",Toast.LENGTH_SHORT).show();
//// }else{
//// Toast.makeText(MainActivity.this,"不存在",Toast.LENGTH_SHORT).show();
//// }
// try {
// verifyStoragePermissions(MainActivity.this);
//
// InputStream inputStream = new FileInputStream("data/data/com.example.myapplication/14天健康登记样表.xls");
// if(inputStream==null)
// {
// Toast.makeText(MainActivity.this,"aaa",Toast.LENGTH_SHORT).show();
// }else{
// HSSFWorkbook hssfWorkbook= new HSSFWorkbook(inputStream);
// HSSFSheet hssfSheet = hssfWorkbook.getSheetAt(0);
// HSSFRow hssfRow = hssfSheet.getRow(1);
// HSSFCell no = hssfRow.getCell(1);
// no.setCellValue("石家庄铁道大学");
// Toast.makeText(MainActivity.this,String.valueOf(no.getStringCellValue()),Toast.LENGTH_SHORT).show();
// OutputStream fos = new FileOutputStream("data/data/com.example.myapplication/14天健康登记样表.xls");
// hssfWorkbook.write(fos);
// fos.flush();
// fos.close();
// }
// } catch (FileNotFoundException e) {
// e.printStackTrace();
// } catch (IOException e) {
// e.printStackTrace();
// }
// }
// public static void verifyStoragePermissions(Activity activity) {
// // Check if we have write permission
// int permission = ActivityCompat.checkSelfPermission(activity,
// Manifest.permission.WRITE_EXTERNAL_STORAGE);
// if (permission != PackageManager.PERMISSION_GRANTED) {
// // We don't have permission so prompt the user
// ActivityCompat.requestPermissions(activity, PERMISSIONS_STORAGE,
// REQUEST_EXTERNAL_STORAGE);
// }
// }
}