Android_tools

implementation 'com.github.PhilJay:MPAndroidChart:v3.1.0'

allprojects {
    repositories {
        google()
        jcenter()
        maven { url "https://jitpack.io" }
    }
}

xml布局， lineChart 部件
<com.github.mikephil.charting.charts.LineChart
            android:id="@+id/chart1"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            tools:ignore="MissingClass" />

/**
* @function: 初始化chart相关设置和监听函数
* */
public void initializeChart(){
    lineChart.setOnChartValueSelectedListener(this);
    lineChart.getDescription().setEnabled(true);
    lineChart.setTouchEnabled(true);
    // enable scaling and dragging
    lineChart.setDragEnabled(true);
    lineChart.setScaleEnabled(true);
    lineChart.setDrawGridBackground(false);
    // if disabled, scaling can be done on x- and y-axis separately
    lineChart.setPinchZoom(true);
    // set an alternative background color
    lineChart.setBackgroundColor(Color.TRANSPARENT);
    LineData data = new LineData();
    // 添加五条数据
    for(int i=0;i<5;i++){
        data.addDataSet(createSet("Flex"+i,ColorTemplate.LIBERTY_COLORS[i]));
    }
    data.setValueTextColor(Color.WHITE);
    lineChart.setData(data);
    // get the legend (only possible after setting data)
    Legend l = lineChart.getLegend();
    // modify the legend ...
    l.setForm(Legend.LegendForm.LINE);
    //l.setTypeface(tfLight);
    l.setTextColor(Color.WHITE);

    XAxis xl = lineChart.getXAxis();
    //xl.setTypeface(tfLight);
    xl.setTextColor(Color.WHITE);
    xl.setDrawGridLines(false);
    xl.setAvoidFirstLastClipping(true);
    xl.setEnabled(true);

    YAxis leftAxis = lineChart.getAxisLeft();
    //leftAxis.setTypeface(tfLight);
    leftAxis.setTextColor(Color.WHITE);
    leftAxis.setAxisMaximum(180f);
    leftAxis.setAxisMinimum(0f);
    leftAxis.setDrawGridLines(true);

    YAxis rightAxis = lineChart.getAxisRight();
    rightAxis.setEnabled(false);
}

/**
* @function: 添加模拟数据集,测试函数绘制功能
* */
private void addEntry() {

    LineData data = lineChart.getData();
    if (data != null&&data.getDataSetCount()==5) {

        for(int i=0;i<5;i++){
            ILineDataSet set = data.getDataSetByIndex(i);
            data.addEntry(new Entry(set.getEntryCount(), (float) (Math.random() * 30) + 30f*i), i);
        }
        data.notifyDataChanged();
        // let the lineChart know it's data has changed
        lineChart.notifyDataSetChanged();
        // limit the number of visible entries
        lineChart.setVisibleXRangeMaximum(120);
        // lineChart.setVisibleYRange(30, AxisDependency.LEFT)
        // move to the latest entry
        lineChart.moveViewToX(data.getEntryCount());
        // this automatically refreshes the lineChart (calls invalidate())
        // lineChart.moveViewTo(data.getXValCount()-7, 55f,
        // AxisDependency.LEFT);
    }
}
/**
* @function: 添加传感器数据,用于绘制
* @param arrayList :五个传感器数值，分别 1，2，3，4，5
* */
private void addEntry(ArrayList<Double>arrayList){
    LineData data = lineChart.getData();
    if (data != null&&data.getDataSetCount()==5) {
        for(int i=0;i<5;i++){
            ILineDataSet set = data.getDataSetByIndex(i);
            data.addEntry(new Entry(set.getEntryCount(), arrayList.get(i).floatValue()), i);
        }
        data.notifyDataChanged();
        lineChart.notifyDataSetChanged();
        lineChart.setVisibleXRangeMaximum(120);
        lineChart.moveViewToX(data.getEntryCount());
    }
}
/**
     * @function: 创建linechart中一条折线
     * @param label: 折现legend
     * @Param color:  折线颜色设置
     * */
private LineDataSet createSet(String label,int color) {

    LineDataSet set = new LineDataSet(null, label);
    set.setAxisDependency(YAxis.AxisDependency.LEFT);
    set.setColor(color);
    set.setCircleColor(color);
    set.setLineWidth(2f);
    //set.setCircleRadius(2f);
    set.setFillAlpha(65);
    set.setFillColor(color);
    set.setHighLightColor(Color.rgb(244, 117, 117));
    set.setValueTextColor(color);
    set.setValueTextSize(9f);
    set.setDrawValues(false);
    return set;
}