请问Thread绘图

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Handler handler = new Handler() {
  public void handleMessage(Message msg) {
   switch (msg.what) {
   case(1): invalidate();
      break;
   case(2): Log.i("更新","物件数据"); updateShapePosition(currentShape,0,1); //invalidate(); break;
   }
   super.handleMessage(msg); }
};

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public void run() { try { int i=1; while(true) { if (i%100 == 0) { i = 1; handler.sendEmptyMessage(2); } else { Log.i(TAG,"else " + Integer.toString(i)); handler.sendEmptyMessage(1); i++; Thread.sleep(20); } } }catch(Exception e) { Log.e("Error",e.toString()); }
}

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long startTime = System.currentTimeMillis();
 
while(true) { ....... .... if((System.currentTimeMillis-startTime()) > 2000) { 状态更新; startTime = System.currentTimeMillis(); }
}