按下按钮SplashScreen退出并打开身份验证活动

Question

当我启动应用程序时,我创建了两个Activity"SplashActivity和AuthenticationActivity",它将SplashScreen加载5秒并转移到AuthenticationActivity.现在我的问题是,当我运行应用程序时,它加载splashScreen,但在5秒内,当我点击后退按钮SplashActivity退出并立即AuthenticationActivity出现在前台.如何编码当我点击后退按钮我的应用程序应退出.我试过的代码如下

public class SplashActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_splash);

    Thread splashTimer = new Thread(){


        public void run(){
            try{
                sleep(5000);
                startActivity(new Intent(SplashActivity.this,AuthenticationActivity.class));
                finish();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }finally {
                finish();
            }
        }

    };
    splashTimer.start();
}

@Override
public void onBackPressed() {
    super.onBackPressed();

}

@Override
protected void onPause() {
    super.onPause();
}

@Override
protected void onResume() {
    super.onResume();

}}

Answer 1

Timer timer;
TimerTask timerTask;
@Override
protected void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_splash);
    initialize();
}

private void initialize()
{
    timer = new Timer();
    timerTask = new TimerTask()
    {
        @Override
        public void run()
        {
            //Start your activity here
        }
    };

    timer.schedule(timerTask,2500);
}

@Override
public void onBackPressed() {
    super.onBackPressed();
    timer.cancel();
}

或者您也可以使用Handler

  Handler handler;
  Runnable runnable;

 @Override
 protected void onCreate(Bundle savedInstanceState)
 {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_splash);
    initialize();
 }

private void initialize()
{
   handler = new Handler();
  runnable = new Runnable()
            {
                @Override
                public void run()
                {
                    //start your activity here
                }
            };
   handler.postDelayed(runnable, 5000);
   }

 @Override
public void onBackPressed() {
    super.onBackPressed();
     handler.removeCallbacks(runnable);
 }