Android自定义控件实现时钟效果

public class ClockView extends View{
 private Paint circlePaint,dialPaint,numberPaint;
 //view 的宽高
 private float mWidth,mHeight;
 //圆的半径
 private float circleRadius;
 //圆心X,Y坐标
 private float circleX,circleY;
 private int second,minute;
 private double hour;

 private Handler handler = new Handler(Looper.getMainLooper()){
  @Override
  public void handleMessage(Message msg) {
   super.handleMessage(msg);
   if(msg.what==0){
    invalidate();
   }
  }
 };

 public ClockView(Context context, AttributeSet attrs) {
  super(context, attrs);
  initPaint();
 }

 private void initPaint(){
  //刻盘圆，小时刻度，时针和分针的画笔
  circlePaint = new Paint(Paint.ANTI_ALIAS_FLAG);
  circlePaint.setColor(Color.BLACK);
  circlePaint.setStyle(Paint.Style.STROKE);
  circlePaint.setStrokeWidth(10);

  //分钟刻度的画笔
  dialPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
  dialPaint.setColor(Color.BLACK);
  dialPaint.setStrokeWidth(5);

  //数字的画笔
  numberPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
  numberPaint.setColor(Color.BLACK);
  numberPaint.setStrokeWidth(5);
  numberPaint.setTextSize(30);
 }

 @Override
 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
  super.onMeasure(widthMeasureSpec, heightMeasureSpec);
  mWidth = getMeasuredWidth();
  mHeight = getMeasuredHeight();
  if(mWidth

public Point(float x, float y) {
 this.x = x;
 this.y = y;
}

public float getX() {
 return x;
}

public void setX(float x) {
 this.x = x;
}

public float getY() {
 return y;
}

public void setY(float y) {
 this.y = y;
}

public class ClockActivity extends Activity{

  private ClockView clockView;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   setContentView(R.layout.clock_layout);
   clockView = (ClockView) findViewById(R.id.clock);
  }

  @Override
  protected void onResume() {
   super.onResume();
   clockView.startClock();
  }

  @Override
  protected void onStop() {
   super.onStop();
   clockView.stopClock();
  }
 }