Android自定义View

一步一步教你写股票走势图——分时图一(概述)

2016-06-15  本文已影响370人  AJiangNo1

目录
一步一步教你写股票走势图——分时图一(概述)
一步一步教你写股票走势图——分时图二(自定义xy轴)
一步一步教你写股票走势图——分时图三(对齐图表、自定义柱状图高亮)
一步一步教你写股票走势图——分时图四(高亮联动)
一步一步教你写股票走势图——分时图五(自定义标记)


demo更新地址https://github.com/AndroidJiang/StockChart


因为公司的项目需求,最近不得不研究下股票走势图,经过自己的学习和筛选,考虑到自己自定义图表库水平有限,最后选择MpAndroidChart,项目源码将会在开发完毕后放到github上,欢迎star,图表库来实现股票走势图,本项目用的是v2.2.5。股票走势图大致有两种:分时图,K线图。下面先贴上最终要实现的效果图:

这里写图片描述 大致代码如下:
  private void initChart() {
    lineChart.setScaleEnabled(false);
    lineChart.setDrawBorders(true);
    lineChart.setBorderWidth(1);
    lineChart.setBorderColor(getResources().getColor(R.color.grayLine));
    lineChart.setDescription("");
    Legend lineChartLegend = lineChart.getLegend();
    lineChartLegend.setEnabled(false);

    barChart.setScaleEnabled(false);
    barChart.setDrawBorders(false);
  /*  barChart.setBorderWidth(1);
    barChart.setBorderColor(getResources().getColor(R.color.grayLine));*/
    barChart.setDescription("");
    Legend barChartLegend = barChart.getLegend();
    barChartLegend.setEnabled(false);
    //x轴
    xAxis = lineChart.getXAxis();
    xAxis.setPosition(XAxis.XAxisPosition.BOTTOM);
    xAxis.setLabelsToSkip(59);



    //左边y
    axisLeft = lineChart.getAxisLeft();
    axisLeft.setLabelCount(5, true);
    axisLeft.setDrawLabels(true);

    //bar x y轴
    xAxisBar = barChart.getXAxis();
    xAxisBar.setDrawLabels(false);
    xAxisBar.setDrawGridLines(false);

    axisLeftBar = barChart.getAxisLeft();
    axisLeftBar.setDrawGridLines(false);


    axisRightBar = barChart.getAxisRight();
   // axisRightBar.setDrawLabels(false);
    axisRightBar.setDrawGridLines(false);

    //y轴样式
    this.axisLeft.setValueFormatter(new YAxisValueFormatter() {
        @Override
        public String getFormattedValue(float value, YAxis yAxis) {
            DecimalFormat mFormat = new DecimalFormat("#0.00");
            return mFormat.format(value);
        }
    });
    //右边y
    this.axisRight = lineChart.getAxisRight();
    this.axisRight.setLabelCount(5, true);
    this.axisRight.setDrawLabels(true);
    this.axisRight.setValueFormatter(new YAxisValueFormatter() {
        @Override
        public String getFormattedValue(float value, YAxis yAxis) {
            DecimalFormat mFormat = new DecimalFormat("#0.00%");
            return mFormat.format(value);
        }
    });

    this.axisRight.setStartAtZero(false);
    this.axisRight.setDrawGridLines(false);
    this.axisRight.setDrawAxisLine(false);
    //背景线
    this.xAxis.setGridColor(getResources().getColor(R.color.grayLine));
    this.xAxis.setAxisLineColor(getResources().getColor(R.color.grayLine));
    this.axisLeft.setGridColor(getResources().getColor(R.color.grayLine));
    this.axisRight.setAxisLineColor(getResources().getColor(R.color.grayLine));

}

获取数据:

private void getMinutesData() {
    String code = "sz002081";
    subscriptionMinute = clientApi.getMinutes(code)
            .compose(SchedulersCompat.<ResponseBody>applyIoSchedulers())
            .subscribe(new Subscriber<ResponseBody>() {
                @Override
                public void onCompleted() {
                }

                @Override
                public void onError(Throwable e) {
                    showToast("更新失败" + e.toString());
                }

                @Override
                public void onNext(ResponseBody minutes) {
                    MData mData = new MData();
                    JSONObject object = null;
                    try {
                        object = new JSONObject(minutes.string());
                    } catch (JSONException e) {
                        e.printStackTrace();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                    mData.parseData(object);
                    setData(mData);

                }
            });
    mCompositeSubscription.add(subscriptionMinute);
}

塞入数据:

private void setData(MData mData) {
    if (mData.getDatas().size() == 0) {
        lineChart.setNoDataText("暂无数据");
        return;
    }
    //设置y左右两轴最大最小值
    axisLeft.setAxisMinValue(mData.getMin());
    axisLeft.setAxisMaxValue(mData.getMax());
    axisRight.setAxisMinValue(mData.getPercentMin());
    axisRight.setAxisMaxValue(mData.getPercentMax());


    axisLeftBar.setAxisMaxValue(mData.getVolmax());
    axisLeftBar.setAxisMinValue(0);//即使最小是不是0,也无碍
    axisLeftBar.setShowOnlyMinMax(true);
    axisRightBar.setAxisMaxValue(mData.getVolmax());
    axisRightBar.setAxisMinValue(0);//即使最小是不是0,也无碍
    axisRightBar.setShowOnlyMinMax(true);
    //基准线
    LimitLine ll = new LimitLine(mData.getBaseValue());
    ll.setLineWidth(1f);
    ll.setLineColor(Color.RED);
    ll.enableDashedLine(10f, 10f, 0f);
    ll.setLineWidth(1);
    axisLeft.addLimitLine(ll);


    ArrayList<Entry> lineCJEntries = new ArrayList<Entry>();
    ArrayList<Entry> lineJJEntries = new ArrayList<Entry>();
    ArrayList<String> dateList = new ArrayList<String>();
    ArrayList<BarEntry> barEntries = new ArrayList<BarEntry>();
    ArrayList<String> xVals = new ArrayList<String>();

    for (int i = 0; i < mData.getDatas().size(); i++) {
        //避免数据重复,skip也能正常显示
        if(mData.getDatas().get(i).time.equals("13:30")){
            continue;
        }
        lineCJEntries.add(new Entry(mData.getDatas().get(i).chengjiaojia, i));

        lineJJEntries.add(new Entry(mData.getDatas().get(i).junjia, i));
        barEntries.add(new BarEntry(mData.getDatas().get(i).chengjiaoliang, i));
        dateList.add(mData.getDatas().get(i).time);
    }
    d1 = new LineDataSet(lineCJEntries, "成交价");
    d2 = new LineDataSet(lineJJEntries, "均价");
    barDataSet = new BarDataSet(barEntries, "成交量");

    d1.setCircleRadius(0);
    d2.setCircleRadius(0);
    d1.setColor(Color.BLUE);
    d2.setColor(Color.RED);
    d1.setHighLightColor(Color.BLACK);
    d2.setHighlightEnabled(false);
    d1.setDrawFilled(true);

    barDataSet.setBarSpacePercent(0); //bar空隙
    barDataSet.setHighLightColor(Color.BLACK);
    barDataSet.setHighLightAlpha(255);
    barDataSet.setDrawValues(false);
    //谁为基准
    d1.setAxisDependency(YAxis.AxisDependency.LEFT);
   // d2.setAxisDependency(YAxis.AxisDependency.RIGHT);
    ArrayList<ILineDataSet> sets = new ArrayList<ILineDataSet>();
    sets.add(d1);
    sets.add(d2);
    LineData cd = new LineData(dateList, sets);
    lineChart.setData(cd);

    BarData barData=new BarData(dateList,barDataSet);
    barChart.setData(barData);
    lineChart.invalidate();//刷新图
    barChart.invalidate();
}

总结一下有几个问题:


目录
一步一步教你写股票走势图——分时图一(概述)
一步一步教你写股票走势图——分时图二(自定义xy轴)
一步一步教你写股票走势图——分时图三(对齐图表、自定义柱状图高亮)
一步一步教你写股票走势图——分时图四(高亮联动)
一步一步教你写股票走势图——分时图五(自定义标记)


demo更新地址https://github.com/AndroidJiang/StockChart


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