Android开发工具之AChartEngine

最近在做一个关于股票的软件(for Android),在软件中需要实现一个 股票走势图的功能,本来想到用 最基础的画板和画笔去实现来着,在设计的过程中发现好复杂,需要抽象出很多东西,而且代码量也不小(相对之后提到的来说),我是一个真真正正的懒人,实在不乐意动手写那么多东西,而且还会有很多不可预见性的风险,于是 上网查了一些资料,跟朋友咨询了一下,发现了它(AChartEngine):

AChartEngine is a charting library for Android applications. It currently supports the following chart types:
    line chart
    area chart
    scatter chart
    time chart
    bar chart
    pie chart
    bubble chart
    doughnut chart
    range (high-low) bar chart
    dial chart / gauge

怎么样?是不是一个很强大呢?当然是针对Android来说的,如果对PC和Web来说这都是皮毛…^_^

我先吃饭…一会接着写!

呵呵!这么晚了?忘了还有文章没写完…先上图吧,这是我参考官方文档写的一个Demo,等有有时间在把代码和我找到的相关函数贴上来吧……



虽然很丑,但这是我的辛辛苦苦的劳动成果呢…呵呵,没想到我现在看英文文档都能写代码了,哈!有进步哦


第二天……


开始贴代码:


首先引入jar包,就不j细说了……


---------------------------StockChartBuilder.java ------------------------------------

/**
* ClassName : </br>
* <p>
* 功能描述:股票走势图
* </p>
* History</br>
* Create User: LuPing</br>
* Create Date: 2011-5-15 下午07:10:54</br>
* Update User:</br>
* Update Date:</br>
*/
public class StockChartBuilder extends Activity {
public static final String TYPE = "type";

private XYMultipleSeriesDataset mDataset = new XYMultipleSeriesDataset();

private XYMultipleSeriesRenderer mRenderer = new XYMultipleSeriesRenderer();

private XYSeries mCurrentSeries;

private XYSeriesRenderer mCurrentRenderer;

private String mDateFormat;

private GraphicalView mChartView;

/**
* 提取保存数据 恢复Activity状态
*/
@Override
protected void onRestoreInstanceState(Bundle savedState) {
super.onRestoreInstanceState(savedState);
mDataset = (XYMultipleSeriesDataset) savedState
.getSerializable("dataset");
mRenderer = (XYMultipleSeriesRenderer) savedState
.getSerializable("renderer");
mCurrentSeries = (XYSeries) savedState
.getSerializable("current_series");
mCurrentRenderer = (XYSeriesRenderer) savedState
.getSerializable("current_renderer");
mDateFormat = savedState.getString("date_format");
}

/**
* 在Activity销毁前 保存数据状态
*/
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putSerializable("dataset", mDataset);
outState.putSerializable("renderer", mRenderer);
outState.putSerializable("current_series", mCurrentSeries);
outState.putSerializable("current_renderer", mCurrentRenderer);
outState.putString("date_format", mDateFormat);
}

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.xy_chart);

// 创建 系列(画笔、渲染)
String seriesTitle = "上证指数";
XYSeries series = new XYSeries(seriesTitle);
mDataset.addSeries(series);
mCurrentSeries = series;
XYSeriesRenderer seriesRenderer = new XYSeriesRenderer();

// 设置seriesRenderer风格
seriesRenderer.setColor(Color.BLUE); // 画笔颜色
seriesRenderer.setFillBelowLine(true); // 确定填充
seriesRenderer.setFillBelowLineColor(Color.RED); //填充颜色
// seriesRenderer.setFillPoints(true); // 不知道干什么用的
seriesRenderer.setPointStyle(PointStyle.POINT); //设置画笔风格
seriesRenderer.setLineWidth(3.0f); // 设置画笔宽度

mRenderer.addSeriesRenderer(seriesRenderer);
mRenderer.setYAxisMin(0d); // 设置Y维度最小值
mRenderer.setYAxisMax(120d); // 设置Y维度最大值
mRenderer.setXAxisMax(24d);// 设置X维度最大值
mRenderer.setShowGrid(true); // 设置背景格子
mRenderer.setXLabels(24); // 设置X坐标分成24份
mRenderer.setChartTitle("上证指数-24小时走势图");
mCurrentRenderer = seriesRenderer;

// 数据绘制 To Do
double x = 0;
double y = 0;
// 获取 (x,y) 数据集
int[][] xyValues = getValues();

for (int i = 0; i < xyValues.length; i++) {
x = xyValues[i][0];
y = xyValues[i][1];
mCurrentSeries.add(x, y);
}

}

/**
* 在 onResume 里进行绘制 在横屏切换时自动调用
*/
@Override
protected void onResume() {
super.onResume();
if (mChartView == null) {
LinearLayout layout = (LinearLayout) findViewById(R.id.chart);
mChartView = ChartFactory.getLineChartView(this, mDataset,
mRenderer);
layout.addView(mChartView, new LayoutParams(
LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));

} else {
mChartView.setBackgroundResource(R.id.chart);
mChartView.repaint();
}
}

/**
* 数据入口
*
* @return x、y 坐标集
*/
private int[][] getValues() {
int[][] xyValues = { { 0, 88 }, { 1, 79 }, { 2, 75 }, { 3, 71 },
{ 4, 90 }, { 5, 88 }, { 6, 66 }, { 7, 65 }, { 8, 50 },
{ 9, 78 }, { 10, 67 }, { 11, 77 }, { 12, 79 }, { 13, 85 },
{ 14, 89 }, { 15, 93 }, { 16, 95 }, { 17, 99 }, { 18, 66 },
{ 19, 55 }, { 20, 44 } };
return xyValues;
}

/*
* (non-Javadoc)
*
* @see android.app.Activity#onTouchEvent(android.view.MotionEvent)
*/
@Override
public boolean onTouchEvent(MotionEvent event) {

return super.onTouchEvent(event);
}
}
------------------------------  xy_chart.xml (Layout) -----------------------------------


<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">

<TextView android:layout_width="wrap_content" android:layout_height="wrap_content"
android:text="@string/add_values" />

<TableLayout android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="wrap_content">

</TableLayout>

<LinearLayout android:id="@+id/chart" android:orientation="horizontal"
android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_weight="1" />

<LinearLayout android:orientation="horizontal"
android:layout_width="fill_parent" android:layout_height="wrap_content" >
</LinearLayout>

</LinearLayout>

--------------------------------  AndroidManifest.xml -------------------------------------

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.cn.eagle"
android:versionCode="1"
android:versionName="1.0">

<application android:icon="@drawable/icon" android:label="@string/app_name">
  <activity android:name=". StockChartBuilder "
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>

  <activity android:name="org.achartengine.GraphicalActivity" />

</application>
</manifest>
----------------------------------  strings.xml (values)----------------------------------------

<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="hello">Hello World, ChartTest!</string>
<string name="app_name">走势图(示例)</string>
<string name="add_values">输入值生成走势图</string>
<string name="x">X</string>
<string name="y">Y</string>
<string name="add">Add</string>
<string name="new_series">New series</string>
</resources>



打完收工^_^ ……

你可能感兴趣的:(achartengine)