延時跳轉頁面（Handler的方式）

/**

• 延時跳轉頁面
  */
  public class MainActivity extends Activity {

  private TextView text_time;
  private int time = 5;// 記錄倒計時
  private Handler handler = new Handler() {
  public void handleMessage(android.os.Message msg) {
  if (msg.what == 0) {
  if (time > 0) {
  time–;
  text_time.setText(time + “s”);
  // 重新發送訊息
  handler.sendEmptyMessageDelayed(0, 1000);
  } else {
  // 跳轉
  Intent intent = new Intent(MainActivity.this,
  SecondActivity.class);
  startActivity(intent);
  finish();
  }
  }
  };
  };

  @Override
  protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  // 初始化控制元件
  text_time = (TextView) findViewById(R.id.text_time);
  // 進入頁面,執行倒計時—延遲1s傳送一條訊息
  handler.sendEmptyMessageDelayed(0, 1000);
  }

  public void tiao(View view) {
  // 跳轉
  Intent intent = new Intent(MainActivity.this, SecondActivity.class);
  startActivity(intent);
  handler.removeCallbacksAndMessages(null);
  finish();
  }
  }