2021.3.23 个人作业第三阶段

一、今日学习内容

   体温上报个人作业的第三阶段——体温统计地图可视化：折线图

  

package com.example.tiwen;

import android.graphics.Color;
import android.os.Bundle;
import android.view.View;
import android.widget.ListView;

import androidx.appcompat.app.AppCompatActivity;

import org.litepal.LitePal;

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

import lecho.lib.hellocharts.formatter.SimpleLineChartValueFormatter;
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 ListActivity extends AppCompatActivity {

    private ListView listview;
    private List<TiWen> stepEntityList = new ArrayList<>();
    private TiWen t;
    private LineChartView lineChart;
    private List<TiWen> list;
    String ID1;
    String[] date ;
    Float[] tiwen;
    private List<PointValue> mPointValues = new ArrayList<PointValue>();
    private List<AxisValue> mAxisXValues = new ArrayList<AxisValue>();
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_list);

        List<Judge> judge= LitePal.findAll(Judge.class);
        for(Judge j:judge){
            ID1=j.getID1();
        }
        list= (List<TiWen>) LitePal.where("ID1 = ?",ID1).find(TiWen.class);
        initView();

        date=new String[list.size()];
        tiwen=new Float[list.size()];

        for (int i=0;i<list.size();i++){

            date[i]=list.get(i).getDate1();
            tiwen[i]=Float.parseFloat(list.get(i).getTiwen());
        }

        getAxisXLables();
        getAxisPoints();
        initLineChart();
    }

    private void initLineChart(){
        Line line = new Line(mPointValues).setColor(Color.parseColor("#FFCD41"));
        List<Line> lines = new ArrayList<Line>();
        line.setShape(ValueShape.CIRCLE);    //折线图上每个数据点的形状，这里是圆形
        line.setCubic(false);
        line.setFilled(false);
        line.setHasLabels(true);
        line.setHasLines(true);
        line.setHasPoints(true);
        line.setFormatter(new SimpleLineChartValueFormatter(1));//设置显示小数点
        line.setHasLabelsOnlyForSelected(true);//点击数据坐标提示数据（设置了这个line.setHasLabels(true);就无效）
        lines.add(line);
        LineChartData data = new LineChartData();
        data.setLines(lines);

        //坐标轴
        Axis axisX = new Axis();
        axisX.setHasTiltedLabels(true);
        axisX.setTextColor(Color.parseColor("#D6D6D9"));//设置字体颜色

        axisX.setTextSize(8);//设置字体大小
        axisX.setMaxLabelChars(8);//最多几个X轴坐标
        axisX.setValues(mAxisXValues);
        data.setAxisXBottom(axisX);
        axisX.setHasLines(true);


        Axis axisY = new Axis();
        axisY.setName("");
        axisY.setTextSize(15);
        data.setAxisYLeft(axisY);
        //设置行为属性，缩放、滑动、平移
        lineChart.setInteractive(true);
        lineChart.setZoomType(ZoomType.HORIZONTAL);
        lineChart.setMaxZoom((float) 3);
        lineChart.setLineChartData(data);
        lineChart.setVisibility(View.VISIBLE);
        //设置X轴数据的显示个数（x轴0-7个数据）
        Viewport v = new Viewport(lineChart.getMaximumViewport());
        v.left = 0;
        v.right= 14;
        lineChart.setCurrentViewport(v);
    }

    private void initView() {

        listview=(ListView) findViewById(R.id.listview);
        lineChart = (LineChartView)findViewById(R.id.line_chart);
    }


    private void getAxisXLables(){
        for (int i = 0; i < date.length; i++) {
            mAxisXValues.add(new AxisValue(i).setLabel(date[i]));
        }
    }

    private void getAxisPoints(){
        for (int i = 0; i < tiwen.length; i++) {
            mPointValues.add(new PointValue(i, tiwen[i]));
        }
    }
}

效果图:

二、遇到的问题

   开始对于折线图上的点，点击之后不能显示具体温度、

三、明日计划

   明天完成地图可视化