AChartEngine图标库之动态柱状图_axchart_engine

效果图

核心代码:

1 设置点集

<span style="font-size:18px;"> //设置点集
    private XYMultipleSeriesDataset getDataset() {
        mDataset = new XYMultipleSeriesDataset();
        series = new XYSeries("柱状图");
        mDataset.addSeries(series);
        return mDataset;
    }</span>

2 设置描绘器

<span style="font-size:18px;">private XYMultipleSeriesRenderer getRender() {
        mRender = new XYMultipleSeriesRenderer();
        setRenderer(mRender, color);
        setChartSettings(mRender, title, xMessage, yMessage, yMin, yMax);
        mRender.setXLabels(0);//取消X轴数据,自定义显示
        mRender.setYLabels(10);//Y轴10等分
        mRender.setClickEnabled(true);//不允许点击事件
        mRender.setPanEnabled(false, false);//不允许移动
        mRender.setShowGrid(true);//显示表格
        mRender.setBarSpacing(0.5f);//设置表格的宽度,柱子的宽度也会有所变化
        return mRender;
    }</span>

3 构建图表

mChartView = ChartFactory.getBarChartView(context, getDataset(),
                    getRender(), BarChart.Type.DEFAULT);

4 计时器定时刷新

private void sendMessage() {
        handler = new Handler() {
            @Override
            public void handleMessage(Message msg) {
                if (msg.what == 1) {
                    updateChart();
                }
                super.handleMessage(msg);
            }
        };
        task = new TimerTask() {
            @Override
            public void run() {
                Message message = new Message();
                message.what = 1;
                handler.sendMessage(message);
            }
        };
        timer.schedule(task, 0, 1000);
    }

5 刷新

 private void updateChart() {
        //随机数模拟数据
        int data = (int) (Math.random() * 100);
        //x轴显示当前时间(仅仅显示分,秒)
        String xDate = nowTime.format(new java.util.Date());
        //得到x轴上柱子的数量
        int lenght = series.getItemCount();
        //此处显示柱子显示的最大数量
        if (lenght > xLengh) {
            lenght = xLengh;
        }
        //移除点集
        mDataset.removeSeries(series);
        //x轴当前点数小于最大点数则直接添加,否则先移除旧点,再添加新点,并转换坐标实现移动效果
        if (lenght < xLengh) {
            series.add(lenght + 1, data);
            mRender.addXTextLabel(lenght + 1, xDate);
            xKedu[lenght] = xDate;
        } else {
            for (int i = 0; i < lenght - 1; i++) {
                catchs[i] = (float) (series.getY(i + 1));
                xKedu[i] = xKedu[i + 1];
            }
            series.clear();
            for (int i = 0; i < lenght - 1; i++) {
                series.add(i + 1, catchs[i]);
                mRender.addXTextLabel(i + 1, xKedu[i]);
            }
            xKedu[xLengh - 1] = xDate;
            series.add(xLengh, data);
            mRender.addXTextLabel(xLengh, xDate);
        }
        mDataset.addSeries(series);
        //这里实现图表的移动效果
        mChartView.invalidate();
    }

源码地址:

http://download.csdn.net/detail/huiling815/9653478