最牛逼android上的图表库MpChart（二） 折线图

<RelativeLayout 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/chart1"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

</RelativeLayout>

package com.example.mpchart;
 
import java.util.ArrayList;
 
import android.app.Activity;
import android.graphics.Color;
import android.graphics.Typeface;
import android.os.Bundle;
import android.os.Handler;
import android.os.Looper;
import android.os.Message;
import android.view.WindowManager;
 
import com.example.mpchart.data.IDataSource;
import com.example.mpchart.data.IDataSource.onDataChangedListener;
import com.example.mpchart.data.SucRateDataSource;
import com.example.mpchart.utils.DBHelper;
import com.example.mpchart.utils.DateUtils;
import com.example.mpchart.utils.LogUtils;
import com.github.mikephil.charting.charts.LineChart;
import com.github.mikephil.charting.components.Legend;
import com.github.mikephil.charting.components.Legend.LegendDirection;
import com.github.mikephil.charting.components.Legend.LegendForm;
import com.github.mikephil.charting.components.LimitLine;
import com.github.mikephil.charting.components.LimitLine.LimitLabelPosition;
import com.github.mikephil.charting.components.XAxis;
import com.github.mikephil.charting.components.XAxis.XAxisPosition;
import com.github.mikephil.charting.components.YAxis;
import com.github.mikephil.charting.components.YAxis.YAxisLabelPosition;
import com.github.mikephil.charting.data.Entry;
import com.github.mikephil.charting.data.LineData;
import com.github.mikephil.charting.data.LineDataSet;

    public class MainActivity extends Activity {

        private static final String TAG = "MainActivity";

        private LineChart mChart;
        private IDataSource mDataSource = new SucRateDataSource();

        private Handler mHandler = new Handler(Looper.getMainLooper()) {
            @Override
            public void handleMessage(Message msg) {
                super.handleMessage(msg);
                getData();
            }
        };

        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                    WindowManager.LayoutParams.FLAG_FULLSCREEN);
            setContentView(R.layout.activity_main);

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

// //在chart上的右下角加描述
            mChart.setDescription(mDataSource.getDescription());
            mChart.setDescriptionTextSize(30);
// //设置Y轴上的单位
// mChart.setUnit("%");
//设置透明度
// mChart.setAlpha(0.8f);
//设置网格底下的那条线的颜色
// mChart.setBorderColor(Color.rgb(213, 216, 214));
// mChart.setBorderColor(Color.rgb(0, 0, 0));
// mChart.setBackgroundColor(Color.rgb(255, 255, 255));
            mChart.setGridBackgroundColor(Color.rgb(255, 255, 255));

//设置Y轴前后倒置
// mChart.setInvertYAxisEnabled(false);
// //设置高亮显示
// mChart.setHighlightEnabled(true);
//设置是否可以触摸，如为false，则不能拖动，缩放等
            mChart.setTouchEnabled(true);
//设置是否可以拖拽，缩放
            mChart.setDragEnabled(true);
            mChart.setScaleEnabled(true);
//设置是否能扩大扩小
            mChart.setPinchZoom(true);
// 设置背景颜色
// mChart.setBackgroundColor(Color.GRAY);
//设置点击chart图对应的数据弹出标注
            MyMarkerView mv = new MyMarkerView(this, R.layout.custom_marker_view);
// define an offset to change the original position of the marker
// (optional)
// mv.setOffsets(-mv.getMeasuredWidth() / 2, -mv.getMeasuredHeight());
// mv.setMinimumHeight(80);
// // set the marker to the chart
// mChart.setMarkerView(mv);
// // enable/disable highlight indicators (the lines that indicate the
// // highlighted Entry)
// mChart.setHighlightIndicatorEnabled(false);
//设置字体格式，如正楷
            Typeface tf = Typeface.createFromAsset(getAssets(), "OpenSans-Regular.ttf");
            mChart.setDescriptionTypeface(tf);

            LimitLine ll1 = new LimitLine(95f, "警戒值 95%");
            ll1.setLineWidth(2f);
// ll1.setLineColor(Color.rgb(0,0,0));
// ll1.enableDashedLine(10f, 10f, 0f);
            ll1.setLabelPosition(LimitLabelPosition.LEFT_TOP);
            ll1.setTextSize(15f);
            ll1.setTypeface(tf);

            XAxis xl = mChart.getXAxis();
// xl.setAvoidFirstLastClipping(true);
// xl.setAdjustXLabels(true);
            xl.setPosition(XAxisPosition.BOTTOM); // 设置X轴的数据在底部显示
            xl.setTypeface(tf); // 设置字体
            xl.setTextSize(10f); // 设置字体大小
            xl.setSpaceBetweenLabels(0); // 设置数据之间的间距'

            YAxis yl = mChart.getAxisLeft();
            yl.setPosition(YAxisLabelPosition.OUTSIDE_CHART);
// yl.setAxisMaxValue(220f);
            yl.addLimitLine(ll1);
            yl.setTypeface(tf); // 设置字体
            yl.setTextSize(10f); // s设置字体大小
            yl.setTypeface(tf);
            yl.setAxisMinValue(90f);
            yl.setStartAtZero(false);
// yl.setLabelCount(5); // 设置Y轴最多显示的数据个数

            YAxis y2 = mChart.getAxisRight();
            y2.setPosition(YAxisLabelPosition.OUTSIDE_CHART);
            y2.setTypeface(tf); // 设置字体
            y2.setTextSize(10f); // s设置字体大小
            y2.setTypeface(tf);
            y2.setAxisMinValue(90f);
            y2.setStartAtZero(false);
            getData();
            new Thread(mRunnable).start();
        }

        private Runnable mRunnable = new Runnable() {
            @Override
            public void run() {
                while(true) {
                    try {
                        Thread.sleep(15*1000);//每隔15s刷新一次，可以看到动态图
                        mHandler.sendMessage(mHandler.obtainMessage());
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
            }
        };

        private onDataChangedListener listener = new onDataChangedListener() {
            @Override
            public void onChanged(String[] xx, String[] yy) {
                notifyDataChanged(xx, yy);
            }

        };

        private void getData() {
            LogUtils.d(TAG, "getData() " + DateUtils.getCurrentDate());
            new Thread(new Runnable() {
                @Override
                public void run() {
                    DBHelper.getInstance().init();
                    String sql = "select *from suc_rate_chart_0614";
                    final String[] xx = DBHelper.getInstance().query(sql,2);
                    final String[] yy = DBHelper.getInstance().query(sql,3);
                    mHandler.post(new Runnable() {
                        @Override
                        public void run() {
                            listener.onChanged(xx, yy);
                        }
                    });
                }
            }).start();
        }

        private void notifyDataChanged(String[] xx, String[] yy) {
            Typeface tf = Typeface.createFromAsset(getAssets(),"OpenSans-Regular.ttf");
// 加载数据
            setData(xx,yy );
//从X轴进入的动画
            mChart.animateX(2000);
// mChart.animateY(2000); //从Y轴进入的动画
// mChart.animateXY(2000, 2000); //从XY轴一起进入的动画

//设置最小的缩放
            mChart.setScaleMinima(0.5f, 1f);
//设置视口
// mChart.centerViewPort(10, 50);

// get the legend (only possible after setting data)
            Legend l = mChart.getLegend();
            l.setForm(LegendForm.CIRCLE); //设置图最下面显示的类型
            l.setTypeface(tf);
            l.setTextSize(30);
            l.setTextColor(Color.rgb(244, 117, 117));
            l.setDirection(LegendDirection.LEFT_TO_RIGHT);
            l.setYOffset(100);
            l.setFormSize(20f); // set the size of the legend forms/shapes

// 刷新图表
            mChart.invalidate();
        }

        private void setData(String[] xx, String[] yy) {

            ArrayList<String> xVals = new ArrayList<String>();
            for (int i = 0; i < xx.length; i++) {
                xVals.add(xx[i]);
            }

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

            for (int i = 0; i < yy.length; i++) {
                yVals.add(new Entry(Float.parseFloat(yy[i]), i));
                LogUtils.d(TAG, "yVals() " + Float.parseFloat(yy[i]));
            }

// create a dataset and give it a type
            LineDataSet set1 = new LineDataSet(yVals, "成功率监控");

            set1.setDrawCubic(false); //设置曲线为圆滑的线
            set1.setCubicIntensity(0.2f);
            set1.setDrawFilled(false); //设置包括的范围区域填充颜色
            set1.setDrawCircles(true); //设置有圆点
            set1.setLineWidth(2f); //设置线的宽度
            set1.setCircleSize(5f); //设置小圆的大小
            set1.setHighLightColor(Color.rgb(244, 117, 117));
            set1.setColor(Color.rgb(244, 117, 117)); //设置曲线的颜色

// create a data object with the datasets
            LineData data = new LineData(xVals, set1);

// set data
            mChart.setData(data);