(1) xml控件：

? ? android:id="@+id/mTextView"

? ? android:layout_width="match_parent"

? ? android:layout_height="match_parent" />

（2）Activity:

private CountDownTimerstart;

start =new CountDownTimer(6000, 1000) {

@Override

? ? ? ? public void onTick(long millisUntilFinished) {

mTextView.setText("跳轉(zhuǎn)" +"(" + millisUntilFinished /1000 +"秒" +")");

? ? ? ? }

@Override

? ? ? ? public void onFinish() {

startActivity(new Intent(WelcomeActivity2.this, WelcomeActivity3.class));

? ? ? ? }

}.start();

}

防止二次跳轉(zhuǎn)

start.cancel();