async-await

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    getSupportActionBar().hide();
    setContentView(R.layout.activity_main);
    webView2 = (WebView) findViewById(R.id.webView);

    Log.v("htmlg","oncreate started");

    main_command();
    /*
    *
    *  main_command(), When this command run application must wait in here.
    *
    * */

    Log.v("htmlg", "oncreate finished");

}
public static int finished = 0;

public void main_command(){

    /*
    * 
    * There is some webview actions in here. it takes about 5 minutes.