体温填报APP--使用echarts显示数据

package com.example.tiwen20;

import android.content.Intent;
import android.os.Bundle;

import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;

import com.github.mikephil.charting.charts.LineChart;
import com.github.mikephil.charting.components.AxisBase;
import com.github.mikephil.charting.components.XAxis;
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.formatter.IAxisValueFormatter;

import java.util.ArrayList;
import java.util.List;

public class MPandroidActivity extends AppCompatActivity {
    private LineChart line;
    private XAxis axis;
    private String name;
    private TiwenDB tiwenDB;
    private List<TiwenBean> listMPandroid;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_mpadnroid);
        line = (LineChart) findViewById(R.id.line);
        List<Entry> list=new ArrayList<>();
        Intent intent = getIntent();
        name = intent.getStringExtra("name");
        tiwenDB = new TiwenDB(this);
        listMPandroid = new ArrayList<>();
        listMPandroid = tiwenDB.queryDataFor(name);
        for(int i=0;i<listMPandroid.size();i++)
        {
            System.out.println(listMPandroid.get(i).getTime()+listMPandroid.get(i).getTiwen());
            list.add(new Entry(Stringtofloat(listMPandroid.get(i).getTime().trim()),Float.parseFloat(listMPandroid.get(i).getTiwen())));
        }
        LineDataSet lineDataSet=new LineDataSet(list,name);
        LineData lineData=new LineData(lineDataSet);
        axis = line.getXAxis();
        axis.setLabelCount(1, false);
        axis.setValueFormatter(new IAxisValueFormatter() {
            @Override
            public String getFormattedValue(float value, AxisBase axisBase) {
                int a = (int) value % 100;
                int c = (int) value / 1000;
                int b = (int) (value - a - c * 1000) / 100;
                String d = c + "年" + b + "月" + a + "日";
                return d;
            }
        });
        //有多条数据则使用adddataset()方法 参数是你的DataSet
        //lineData.addDataSet(lineDataSet);
        line.setData(lineData);
    }
    public float Stringtofloat(String str)
    {
        String year = str.substring(0, 4); //取年
        String yue = str.substring(str.indexOf("年") + 2, str.indexOf("月"));
        String ri = str.substring(str.indexOf("月") + 1, str.indexOf("日"));
        String d = year+yue+ri;
        float date = Float.parseFloat(d);
        return date;
    }
}

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
    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">
    <com.github.mikephil.charting.charts.LineChart
        android:id="@+id/line"
        android:layout_width="match_parent"
        android:layout_height="300dp"
        tools:ignore="MissingConstraints">
    </com.github.mikephil.charting.charts.LineChart>

</androidx.constraintlayout.widget.ConstraintLayout>