从其他Activity重启Activity

Question

我有两个活动A和B.我想从A活动转到B活动时重启B活动，我该怎么做？

Intent send_show = new Intent(A.this, B.class);
startActivty(send_show);

Answer 1

要“重新启动”，您只需执行此操作：

Intent send_show = new Intent(B.this, A.class);
finish(); //here restart the B because you are on B class
startActivty(send_show);

否则您可以拨打recreate()

修改

由于您想要“重新启动”计时器，您可以执行以下操作：

public void onDestroy(){
  super.onDestroy();
  //you should restart timer or just cancel and re active it in onCreate() 
}

Answer 2

你的意思是你只需要处理Timer？

public Timer rebuildTimer(Timer timer){
   try{
      if(timer!=null){
         timer.cancel();
         timer = new Timer();
      }
   }catch(Throwable e){

   }
   return timer;
}

private Timer mTimer;

private void onNewIntent(){
    mTimer = rebuildTimer(mTimer);
}

private void onCreate(Some params){
    mTimer = rebuildTimer(mTimer);
}