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