android画折线图之一AChartengine

        由于在项目中要是用到折线图，在网上搜索了一番，发现android有很多的开源项目可以画折线图，有AChartengine，MPAndroid,HelloChart,这三个比较好的开源项目，或许还有别的好项目，但是我认为这三个已经够用了。

       1 AChartengine

      下载地址：https://github.com/jondwillis/AChartEngine

      既然是开源项目，当然是先加包文件

     在程序中加为lib或直接下载包文件放到libs里

      当然，在google上也有，但是谁让google上不去呢。

      使用：

      我想在android开发使用到的最多的还是把图表嵌入到界面activity或fragment中使用，首先就要一个layout去包容chart，

      

<LinearLayout        android:id="@+id/oxy_line"        android:layout_width="match_parent"        android:layout_height="match_parent"        android:padding="20dip"        android:orientation="vertical">    </LinearLayout>

   在java代码中实现

  

public class RongYangFragment extends Fragment {private View mView;private Context mContext;private LinearLayout tuLayout;private View tubiao;private XYMultipleSeriesRenderer renderer;private String[] titles;private List<double[]> x;private List<double[]> values;public RongYangFragment(Context context) {mContext = context;}@Overridepublic View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {mView = inflater.inflate(R.layout.fragment_rongyang, null);tuLayout = (LinearLayout) mView.findViewById(R.id.oxy_line);initView();View view = ChartFactory.getLineChartView(mContext,buildDataset(titles, x, values), renderer);// 图表部分的背景颜色view.setBackgroundColor(Color.WHITE);tuLayout.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.MATCH_PARENT));tuLayout.addView(view);return mView;}public void initView() {titles = new String[] { "Crete", "Corfu", "Thassos", "Skiathos" };x = new ArrayList<double[]>();for (int i = 0; i < titles.length; i++) {x.add(new double[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 });}values = new ArrayList<double[]>();values.add(new double[] { 12.3, 12.5, 13.8, 16.8, 20.4, 24.4, 26.4,26.1, 23.6, 20.3, 17.2, 13.9 });values.add(new double[] { 10, 10, 12, 15, 20, 24, 26, 26, 23, 18, 14,11 });values.add(new double[] { 5, 5.3, 8, 12, 17, 22, 24.2, 24, 19, 15, 9, 6 });values.add(new double[] { 9, 10, 11, 15, 19, 23, 26, 25, 22, 18, 13, 10 });// 点的样式int[] colors = new int[] { Color.BLUE, Color.GREEN, Color.CYAN,Color.YELLOW };PointStyle[] styles = new PointStyle[] { PointStyle.CIRCLE,PointStyle.DIAMOND, PointStyle.TRIANGLE, PointStyle.SQUARE };renderer = buildRenderer(colors, styles);int length = renderer.getSeriesRendererCount();// 点是空心还是实心for (int i = 0; i < length; i++) {((XYSeriesRenderer) renderer.getSeriesRendererAt(i)).setFillPoints(true);}setChartSettings(renderer, "Average temperature", "Month","Temperature", 0.5, 12.5, -10, 40, Color.LTGRAY, Color.LTGRAY);// 轴上数字的数量renderer.setXLabels(12);renderer.setYLabels(10);// 是否显示网格renderer.setShowGrid(true);// x或y轴上数字的方向，相反的。renderer.setXLabelsAlign(Align.RIGHT);renderer.setYLabelsAlign(Align.RIGHT);// 缩放效果renderer.setZoomButtonsVisible(true);renderer.setPanLimits(new double[] { -10, 20, -10, 40 });renderer.setZoomLimits(new double[] { -10, 20, -10, 40 });// 图表部分的背景颜色// renderer.setApplyBackgroundColor(true);// 设置是否显示背景色// renderer.setBackgroundColor(Color.WHITE);// renderer.setBackgroundColor(Color.parseColor("#ffffff"));// renderer.setApplyBackgroundColor(true);// 图表与屏幕四边的间距颜色renderer.setMarginsColor(Color.WHITE);}private XYMultipleSeriesRenderer buildRenderer(int[] colors,PointStyle[] styles) {XYMultipleSeriesRenderer renderer = new XYMultipleSeriesRenderer();setRenderer(renderer, colors, styles);return renderer;}private void setRenderer(XYMultipleSeriesRenderer renderer, int[] colors,PointStyle[] styles) {renderer.setAxisTitleTextSize(16);renderer.setChartTitleTextSize(20);renderer.setLabelsTextSize(15);renderer.setLegendTextSize(15);renderer.setPointSize(5f);renderer.setMargins(new int[] { 20, 30, 15, 20 });int length = colors.length;for (int i = 0; i < length; i++) {XYSeriesRenderer r = new XYSeriesRenderer();r.setColor(colors[i]);r.setPointStyle(styles[i]);renderer.addSeriesRenderer(r);}}private void setChartSettings(XYMultipleSeriesRenderer renderer,String title, String xTitle, String yTitle, double xMin,double xMax, double yMin, double yMax, int axesColor,int labelsColor) {renderer.setChartTitle(title);renderer.setXTitle(xTitle);renderer.setYTitle(yTitle);renderer.setXAxisMin(xMin);renderer.setXAxisMax(xMax);renderer.setYAxisMin(yMin);renderer.setYAxisMax(yMax);renderer.setAxesColor(axesColor);renderer.setLabelsColor(labelsColor);}private XYMultipleSeriesDataset buildDataset(String[] titles,List<double[]> xValues, List<double[]> yValues) {XYMultipleSeriesDataset dataset = new XYMultipleSeriesDataset();addXYSeries(dataset, titles, xValues, yValues, 0);return dataset;}private void addXYSeries(XYMultipleSeriesDataset dataset, String[] titles,List<double[]> xValues, List<double[]> yValues, int scale) {int length = titles.length;for (int i = 0; i < length; i++) {XYSeries series = new XYSeries(titles[i], scale);double[] xV = xValues.get(i);double[] yV = yValues.get(i);int seriesLength = xV.length;for (int k = 0; k < seriesLength; k++) {series.add(xV[k], yV[k]);}dataset.addSeries(series);}}}但是我在项目中使用的时候出现里点错误：

不知到是什么原因，可能是网络请求的原因，但是我把网络请求代码去掉还是出现错误，所以不得不改用别的项目；不过在demo里同样的代码却没有问题。