Android 绘制动态的曲线图

最近因项目的需求需要在某个界面上绘制动态增长的曲线图，网上找了些相关的资料，经过改编简单的实现了该效果，上传代码如下：

public class CornerPathTest extends Activity {
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);
  LinearLayout layout=(LinearLayout)findViewById(R.id.linear);
  layout.addView(new Myview(getApplicationContext()));
 }

 class Myview extends View {
  /* 线程控制 */
  private boolean display = true;
  /* 开始绘制的时候下一个点的x，y */
  private float Yheight = 0;
  private float Xwhite = 0;
  /* 接收要绘制的所有点 */
  private ArrayList<Point> list;
  private HashMap<String, List<Point>> map;
  /* 是否开启动画模式 */
  private boolean animMode = true;
  /* 传过来点 的数量 */
  private int listlength;
  /* 开始绘图点 */
  private int startpoint = 1;
  PathEffect effects = new CornerPathEffect(10);
  int colors = Color.BLUE;
  private Paint paint;
  Path path;
  /*标签文字集合*/
  private String[] series;
  

  public Myview(Context context) {
   super(context);
   init();
  }

  @Override
  protected void onDraw(Canvas canvas) {
   // 将背景填充成白色
   canvas.drawColor(Color.WHITE);
   // 将画布移到8，8处开始绘制
   canvas.translate(8, 8);
   paint.setPathEffect(effects);
   paint.setColor(colors);
   path.lineTo(Xwhite, Yheight);
   canvas.drawPath(path, paint);
   canvas.translate(0, 60);
   Paint p=new Paint();
   p.setStyle(Style.STROKE);
   p.setColor(Color.BLACK);
   p.setStrokeWidth(2);
   for (int i = 0; i < series.length; i++) {
    canvas.drawText(series[i], i*40, 70, p);
   }
   invalidate();
  }

  private Thread thread = new Thread() {

   @Override
   public void run() {
    while (!Thread.currentThread().isInterrupted() && display) {
     Message msg = new Message();
     msg.what = 1;
     handler.sendMessage(msg);
     try {
      // 每隔1秒触发，使得画线的过程看起来平滑
      Thread.sleep(1000);
     } catch (InterruptedException e) {
      System.out.println("InterruptedException ！线程关闭");
      this.interrupt();
     }
    }
   }
  };
  Handler handler = new Handler() {
   public void handleMessage(android.os.Message msg) {
    super.handleMessage(msg);
    if (msg.what == 1 && startpoint < listlength && display) {
     Yheight = list.get(startpoint).y;
     Xwhite = list.get(startpoint).x;
     startpoint++;
    } else {
     display = false;
    }
    /* 刷新UI */
    invalidate();
   };
  };

  private void init() {
   paint = new Paint();
   paint.setStyle(Style.STROKE);
   paint.setStrokeWidth(4);
   // 创建，并初始化Path
   path = new Path();
   path.moveTo(0, 0);
   list = new ArrayList<Point>();
   map = new HashMap<String, List<Point>>();
   for (int i = 1; i <= 10; i++) {
    // 生成15个点，随机生成他们的坐标，并将它们连成一条Path
    Point point = new Point();
    point.x = i * 20;
    point.y = (float) Math.random() * 60;
    list.add(point);
    if (i%2==0) {
     map.put(i * 20 + "m", list);
    }
   }
   listlength = list.size();
   series = map.keySet().toArray(new String[0]);
   if (animMode) {
    thread.start();
   }
  }

 }

}