LineChartActivity.java

package com.fibrlink.adminassistant.index.activity;

import android.app.Activity;
import android.graphics.Color;
import android.graphics.DashPathEffect;
import android.os.Bundle;
import android.view.MotionEvent;

import com.fibrlink.adminassistant.R;
import com.fibrlink.adminassistant.index.view.BrokenlineMarkerView;
import com.github.mikephil.charting.charts.LineChart;
import com.github.mikephil.charting.components.Legend;
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.highlight.Highlight;
import com.github.mikephil.charting.interfaces.datasets.ILineDataSet;
import com.github.mikephil.charting.listener.ChartTouchListener;
import com.github.mikephil.charting.listener.OnChartGestureListener;
import com.github.mikephil.charting.listener.OnChartValueSelectedListener;

import java.util.ArrayList;

public class LineChartActivity extends Activity implements OnChartGestureListener,OnChartValueSelectedListener {

    //线性折线图实例
    private LineChart lineChart;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_line_chart);

        lineChart = (LineChart) findViewById(R.id.chart1);

        initLineChart();
    }

    private void initLineChart() {
        lineChart.setOnChartGestureListener(this);
        lineChart.setOnChartValueSelectedListener(this);
        lineChart.setDrawGridBackground(false);
        lineChart.animateX(2000);
        // no description text
        lineChart.getDescription().setEnabled(true);
        lineChart.setViewPortOffsets(3,100,10,0);

        // enable touch gestures
        lineChart.setTouchEnabled(true);

        // enable scaling and dragging
        lineChart.setDragEnabled(true);
        lineChart.setScaleEnabled(true);

        // if disabled, scaling can be done on x- and y-axis separately
        lineChart.setPinchZoom(false);

        BrokenlineMarkerView brokenlineMarkerView = new BrokenlineMarkerView(getApplicationContext(),R.layout.custom_marker_view);
        brokenlineMarkerView.setChartView(lineChart);
        lineChart.setMarker(brokenlineMarkerView);

        //坐标轴
        XAxis axisX = lineChart.getXAxis();
        axisX.setTextColor(Color.GRAY);  //设置字体颜色
        //axisX.setName("date");  //表格名称
        axisX.setTextSize(10);//设置字体大小
        axisX.setAxisMaximum(12); //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.length
        axisX.setDrawGridLines(false);
        axisX.setLabelCount(10);
        axisX.setPosition(XAxis.XAxisPosition.BOTTOM);
        setData(18, 30);

//        lineChart.animateX(2500);
//        lineChart.setDrawBorders(false);
        //mChart.invalidate();

        // get the legend (only possible after setting data)
        Legend l = lineChart.getLegend();


        // modify the legend ...
        l.setForm(Legend.LegendForm.LINE);
    }

    private void setData(int count, float range) {

        ArrayList<Entry> values = new ArrayList<Entry>();

        for (int i = 0; i < count; i++) {

            float val = (float) (Math.random() * range) + 3;
            values.add(new Entry(i, val));
        }

        LineDataSet set1;

        if (lineChart.getData() != null &&
                lineChart.getData().getDataSetCount() > 0) {
            set1 = (LineDataSet)lineChart.getData().getDataSetByIndex(0);
            set1.setValues(values);
            lineChart.getData().notifyDataChanged();
            lineChart.notifyDataSetChanged();
        } else {
            // create a dataset and give it a type
            set1 = new LineDataSet(values, "DataSet 1");

            // set the line to be drawn like this "- - - - - -"
//            set1.enableDashedLine(10f, 5f, 0f);
//            set1.enableDashedHighlightLine(10f, 5f, 0f);
            set1.setDrawCircles(false);
            set1.setColor(Color.BLUE);
            set1.setCircleColor(Color.BLUE);
            set1.setLineWidth(1f);
            set1.setCircleRadius(1f);
            set1.setDrawCircleHole(false);
            set1.setValueTextSize(9f);
            //是否显示阴影
            set1.setDrawFilled(false);
            set1.setFormLineWidth(1f);
            set1.setFormLineDashEffect(new DashPathEffect(new float[]{10f, 5f}, 0f));
            set1.setFormSize(15.f);
            set1.setFillColor(0);

            ArrayList<ILineDataSet> dataSets = new ArrayList<ILineDataSet>();
            dataSets.add(set1); // add the datasets

            // create a data object with the datasets
            LineData data = new LineData(dataSets);

            lineChart.setKeepPositionOnRotation(true);

            // set data
            lineChart.setData(data);
        }
    }

    @Override
    public void onChartGestureStart(MotionEvent me, ChartTouchListener.ChartGesture lastPerformedGesture) {

    }

    @Override
    public void onChartGestureEnd(MotionEvent me, ChartTouchListener.ChartGesture lastPerformedGesture) {

    }

    @Override
    public void onChartLongPressed(MotionEvent me) {

    }

    @Override
    public void onChartDoubleTapped(MotionEvent me) {

    }

    @Override
    public void onChartSingleTapped(MotionEvent me) {

    }

    @Override
    public void onChartFling(MotionEvent me1, MotionEvent me2, float velocityX, float velocityY) {

    }

    @Override
    public void onChartScale(MotionEvent me, float scaleX, float scaleY) {

    }

    @Override
    public void onChartTranslate(MotionEvent me, float dX, float dY) {

    }

    @Override
    public void onValueSelected(Entry e, Highlight h) {

    }

    @Override
    public void onNothingSelected() {

    }
}