How can I wait for 10 second without locking application UI in android

Question

I am stuck with a problem, I want to wait 10 second because I want my application to start the code below after that 10 sec but without stopping that person from clicking anything else in the application (without calling Thread.sleep();).

try {
    Log.v("msg", "WAIT CheckFrequencyRun");
    Thread.sleep(10000); // giving time to connect to wifi
    
   } catch (InterruptedException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   }
   //if no network
   if(wifiManager.getConnectionInfo().getNetworkId()==-1){
    //stop wifi
    wifiManager.setWifiEnabled(false);
    Log.v("msg", "no connection");
    handler.postDelayed(this, checkInterval);
   }
   //else connection
   else{
    Log.v("msg", "connection");
    onDestroy();
   }

Solution 1

You never want to call thread.sleep() on the UI thread as it sounds like you have figured out. This freezes the UI and is always a bad thing to do. You can use a separate Thread and postDelayed

This SO answer shows how to do that as well as several other options

Handler

TimerTask

You can look at these and see which will work best for your particular situation

Solution 2

You can use this:

Handler handler = new Handler();
handler.postDelayed(new Runnable() {
    public void run() {
     // Actions to do after 10 seconds
    }
}, 10000);

For Stop the Handler, You can try this: handler.removeCallbacksAndMessages(null);

Solution 3

1with handler:

handler.sendEmptyMessageDelayed(1, 10000);
}

private Handler handler = new Handler() {
    @Override
    public void handleMessage(Message msg) {
        if (msg.what == 1) {
           //your code
        }
    }
};

Solution 4

do this on a new thread (seperate it from main thread)

 new Thread(new Runnable() {
     @Override
     public void run() {
        // TODO Auto-generated method stub
     }
}).run();

View more solutions

Comments

[DarkVision]

what is the "TRIGGER" because android documentation ask for a int could not put string

[Anton Bevza]

I was wrong... this is id of your message. Try with 1

[user3833732]

Easy, and worked without any extra effort. I needed something concize and it worked like a charm

[Joshua Pinter]

Beauty!!! Worked like a charm. Thanks!