public class ActivityMain extends Activity { public void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentView(R.layout.main);  spark(); } private int clo = 0; public void spark() {  final TextView touchScreen = (TextView) findViewById(R.id.TextView01);// 獲取頁面textview對象  Timer timer = new Timer();  TimerTask taskcc = new TimerTask(){   public void run() {    runOnUiThread(new Runnable() {     public void run() {      if (clo == 0) {       clo = 1;       touchScreen.setTextColor(Color.TRANSPARENT); // 透明      } else {       if (clo == 1) {        clo = 2;        touchScreen.setTextColor(Color.RED);       } else {        clo = 0;        touchScreen.setTextColor(Color.GREEN);       }      }     }    });   }  };  timer.schedule(taskcc, 1, 300);  // 參數分別是delay（多長時間后執行），duration（執行間隔） }}