An_handler+Timer倒计时
public class SplashActivity extends AppCompatActivity {
private MyHandler myHandler = new MyHandler();
private TextView tv_time;
private MyCountDownTimer mc;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//设置Activity为全屏
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
//去标题状态栏
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_splash);
tv_time = (TextView) findViewById(R.id.tv_time);
mc = new MyCountDownTimer(5000, 1000);
mc.start();
/**
* 使用handler的postDelayed延迟5秒执行页面跳转
* （与CountDownTimer的millisInFuture一致）
*/
myHandler.postDelayed(new Runnable() {
@Override
public void run() {
startMainActivity();
}
},5000);
}
//将Handler声明为静态内部类
private static class MyHandler extends Handler {
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
}
}
//页面跳转的方法
private void startMainActivity(){
Intent intent = new Intent(this,Main3Activity.class);
startActivity(intent);
finish();//完成跳转后销毁闪屏页（从栈内移除）
}
class MyCountDownTimer extends CountDownTimer {
/**
* @param millisInFuture
* 表示以毫秒为单位 倒计时的总数
* 例如 millisInFuture=1000 表示1秒
* @param countDownInterval
* 表示 间隔 多少微秒 调用一次 onTick 方法
* 例如: countDownInterval =1000 ; 表示每1000毫秒调用一次onTick()
*/
public MyCountDownTimer(long millisInFuture, long countDownInterval) {
super(millisInFuture, countDownInterval);
}
public void onFinish() {
tv_time.setText("正在跳转");
}
public void onTick(long millisUntilFinished) {
tv_time.setText("倒计时(" + millisUntilFinished / 1000 + ")");
Log.i("tag","倒计时"+millisUntilFinished / 1000);
}
}
@Override
protected void onDestroy() {
super.onDestroy();
//闪屏页销毁时将消息对象从消息队列移除并结束倒计时
myHandler.removeCallbacksAndMessages(null);
mc.cancel();
Log.i("tag","destory");
}
}
