第一个页面倒计时5秒后自动跳转到第二个页面：

public class MainActivity extends AppCompatActivity {

private TextView textView;

private int count=6;

private Timer timer;

private Handler handler=new Handler(){

@Override

public void handleMessage(Message msg) {

super.handleMessage(msg);

switch (msg.what) {

case 1:

//接受到传过来的值为1时，进行跳转：

Intent it = new Intent(MainActivity.this,Second.class);

startActivity(it);

break;

//为2是则更新倒计时文字信息：

case 2:

textView.setText("倒计时还有"+count+"秒");

break;

}

}

};

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

textView= (TextView) findViewById(R.id.textView);

//获取textview文本控件：

timer=new Timer();

timer.scheduleAtFixedRate(new MyTask(),0,1000);

//设置timer倒计时功能计时时间间隔为1秒：

}

class MyTask extends TimerTask{

@Override

public void run() {

count--;

if(count>0){

handler.sendEmptyMessage(2);

}else {

handler.sendEmptyMessage(1);

timer.cancel();

finish();

}

}

}

}