Paint paint = new Paint();paint.setColor(Color.BLACK);paint.setStyle(Paint.Style.STROKE);Rect chartRec = new Rect(OFFSET_LEFT, OFFSET_TOP, CHARTW + OFFSET_LEFT,CHARTH + OFFSET_TOP);canvas.drawRect(chartRec, paint);

canvas.drawText("100", OFFSET_LEFT - TEXT_OFFSET - 15, OFFSET_TOP + 5,paint);for (int i = 9; i > 0; i--) {canvas.drawText("" + 10 * (10 - i), OFFSET_LEFT - TEXT_OFFSET - 15,OFFSET_TOP + CHARTH / 10 * i, paint);}canvas.drawText("0", OFFSET_LEFT - TEXT_OFFSET - 10, OFFSET_TOP+ CHARTH, paint);

 PathEffect effects = new DashPathEffect(new float[] { 2, 2, 2, 2 }, 1);

Handler handler=new Handler();
Runnable runnable=new Runnable(){@Overridepublic void run() {// TODO Auto-generated method stub//要做的事情handler.postDelayed(this, 1000);}
};

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="vertical" ><LinearLayoutandroid:id="@+id/root"android:orientation = "vertical"android:layout_width="fill_parent"android:layout_height="fill_parent"></LinearLayout></LinearLayout>

public class MainActivity extends Activity {private Handler handler;private DrawTest dtest;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);init();}private void init() {LinearLayout layout = (LinearLayout) findViewById(R.id.root);dtest = new DrawTest(this);dtest.invalidate();layout.addView(dtest);handler = new Handler();handler.post(new Runnable() {@Overridepublic void run() {dtest.invalidate();handler.postDelayed(this, 2000);}});}

}

public class DrawTest extends View {private int CHARTH = 600;//表格的高private int CHARTW = 400;//表格的宽private int OFFSET_LEFT = 70;//距离左边界距离private int OFFSET_TOP = 80;//距离右边界距离private int TEXT_OFFSET = 20;//文本距离设置private int X_INTERVAL = 20;//X坐标间隔距离private List<Point> plist;//点集合public DrawTest(Context context) {super(context);plist = new ArrayList<Point>();}@Overrideprotected void onDraw(Canvas canvas) {super.onDraw(canvas);drawTable(canvas);preparePoint();drawPoint(canvas);}/*** 绘制表* @param canvas*/private void drawTable(Canvas canvas) {Paint paint = new Paint();paint.setColor(Color.BLACK);paint.setStyle(Paint.Style.STROKE);Rect chartRec = new Rect(OFFSET_LEFT, OFFSET_TOP, CHARTW + OFFSET_LEFT,CHARTH + OFFSET_TOP);canvas.drawRect(chartRec, paint);Path textPath = new Path();// 选择一块区域，准备写文字“曲线图测试”
        paint.setStyle(Paint.Style.FILL);textPath.moveTo(200, 30);// 区域开始textPath.lineTo(400, 30);// 区域结束paint.setTextSize(20);paint.setAntiAlias(true);// 指定是否使用抗锯齿功能，会消耗较大资源，绘制图形速度会变慢。canvas.drawTextOnPath("曲线图测试", textPath, 0, 0, paint);// 左侧数值标记canvas.drawText("100", OFFSET_LEFT - TEXT_OFFSET - 15, OFFSET_TOP + 5,paint);for (int i = 9; i > 0; i--) {canvas.drawText("" + 10 * (10 - i), OFFSET_LEFT - TEXT_OFFSET - 15,OFFSET_TOP + CHARTH / 10 * i, paint);}canvas.drawText("0", OFFSET_LEFT - TEXT_OFFSET - 10, OFFSET_TOP+ CHARTH, paint);// 绘制虚线Path path = new Path();/*** PathEffect是用来控制绘制轮廓(线条)的方式。* DashPathEffect是PathEffect类的一个子类,可以使paint画出类似虚线的样子,并且可以任意指定虚实的排列方式.* 代码中的float数组,必须是偶数长度,且>=2,指定了多少长度的实线之后再画多少长度的空白.* 如本代码中,绘制长度2的实线,再绘制长度2的空白,再绘制长度2的实线,再绘制长度2的空白,依次重复.1是偏移量,*/PathEffect effects = new DashPathEffect(new float[] { 2, 2, 2, 2 }, 1);paint.setStyle(Paint.Style.STROKE);paint.setAntiAlias(false);paint.setPathEffect(effects);// 用于设置绘制路径时的路径效果，如点划线。for (int i = 1; i < 10; i++) {path.moveTo(OFFSET_LEFT, OFFSET_TOP + CHARTH / 10 * i);path.lineTo(OFFSET_LEFT + CHARTW, OFFSET_TOP + CHARTH / 10 * i);canvas.drawPath(path, paint);}}/*** 准备绘制点*/private void preparePoint() {//设置点的Y坐标为30-40int py = (CHARTH/10)*6+OFFSET_TOP + (int) Math.rint((Math.random() * (CHARTH/10)));Point p = new Point(OFFSET_LEFT + CHARTW, py);if (plist.size() > 21) {plist.remove(0);//控制点的个数//改变每一个点的X坐标for (int i = 0; i < 20; i++) {if (i == 0)plist.get(i).x -= (X_INTERVAL - 2);elseplist.get(i).x -= X_INTERVAL;}plist.add(p);} else {for (int i = 0; i < plist.size() - 1; i++) {plist.get(i).x -= X_INTERVAL;}plist.add(p);}}/*** 绘制点* * @param canvas*/private void drawPoint(Canvas canvas) {Paint paint = new Paint();paint.setColor(Color.BLACK);paint.setStrokeWidth(3);// 设置笔触的宽度if (plist.size() >= 2) {for (int i = 0; i < plist.size() - 1; i++) {canvas.drawPoint(plist.get(i).x, plist.get(i).y, paint);}}}
}