最牛逼android上的图表库MpChart（二） 折线图

• 最牛逼android上的图表库MpChart二 折线图
  • MpChart折线图介绍
  • MpChart折线图实例
  • MpChart效果

最牛逼android上的图表库MpChart（二） 折线图

最近工作中，用到了mpchart图表库，现在分享受下mpchart图表库的各个图表在实际工作应用场景：

• 最牛逼android上的图表库MpChart（一） 介绍篇
• 最牛逼android上的图表库MpChart（二） 折线图
• 最牛逼android上的图表库MpChart（三） 条形图
• 最牛逼android上的图表库MpChart（四） 饼图
• 最牛逼android上的图表库MpChart（五） 泡泡图

使用mpchart jar包：mpandroidchartlibrary-2-1-6.jar 
如果是在studio下，进行如下引用： 
repositories { 
maven { url “https://jitpack.io” } 
}

dependencies { 
compile ‘com.github.PhilJay:MPAndroidChart:v2.1.6’ 
}

MpChart折线图介绍

• LineChart类

• 使用哪些API

  • setBackgroundColor(int color): Sets the background color that will cover the whole chart-view. In addition, a background-color can be set via .xml in the layout file.
  • setDescription(String desc): Set a description text that appears in the bottom right corner of the chart.
  • setDescriptionColor(int color): Sets the color of the description text.
  • setDescriptionPosition(float x, float y): Sets a custom position for the description text in pixels on the screen.
  • setDescriptionTypeface(Typeface t): Sets the Typeface used for drawing the description text.
  • setDescriptionTextSize(float size): Sets the size of the description text in pixels, min 6f, max 16f.
  • setNoDataTextDescription(String desc): Sets the text that should appear if the chart is empty.
  • setDrawGridBackground(boolean enabled): If enabled, the background rectangle behind the chart drawing-area will be drawn.
  • setGridBackgroundColor(int color): Sets the color the grid-background should be drawn with.
  • setDrawBorders(boolean enabled): Enables / disables drawing the chart borders (lines surrounding the chart).
  • setBorderColor(int color): Sets the color of the chart border lines.
  • setBorderWidth(float width): Sets the width of the chart border lines in dp.
  • setMaxVisibleValueCount(int count): Sets the number of maximum visible drawn value-labels - on the chart. This only takes affect when setDrawValues() is enabled.

MpChart折线图实例

• 布局文件
• Java代码

 <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);
     }
 }

MpChart效果