android - How to wait for webview.post to complete? -

in below code, outside printed before inside. want order inside first , outside. how ensure runnable finished before second log reached?

webview.post(new runnable() {     @override     public void run() {         log.d("check", "inside");     } });  // code needed here  log.d("check", "outside"); 

some code must inserted comment achieve this.

edit: doing work in background service.

[p.s.: curious why doing this, because unless add webview.post, keep getting following error: "all webview methods must called on same thread.". anyway, shouldn't affect answering question.]

you might try using countdownlatch:

final countdownlatch latch = new countdownlatch(1);  webview.post(new runnable() {     @override     public void run() {         log.d("check", "inside");         latch.countdown();     } });  // code needed here latch.await();  log.d("check", "outside"); 

however, wouldn't want use latch.await() on ui thread, that's blocking method. if wanted run on ui thread best replace latch.countdown() call callback method, in turn run log.d("check", "outside").