hide soft keyboard on Android WebView 1

Javascript.js

function hide_soft_keyboard(input_box) {
   input_box.addEventListener("click", function() {
     input_box.blur(); // very important call
     input_box.focus();// very important call x2
   });
}

MainActivity.java

@Override
protected void onCreate(Bundle savedInstanceState) {
   /*
    Normal onCreate stuff
   */
   ExtendedWebView webView = findViewById(R.id.webview_id);
   WebSettings settings = webView.getSettings();
   settings.setJavaScriptEnabled(true);
   webView.addJavascriptInterface(new MyJavascript(), "_my_javascript");
}

WebView.java

@Override 
public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
   hideKeyboard();
   return super.onCreateInputConnection(outAttrs);
}

WebViewHelperFun.java

private void hideKeyboard() {
   post(new Runnable() {
    @Override
    public void run() {
      InputMethodManager imm = (InputMethodManager) getContext()
      .getSystemService(Context.INPUT_METHOD_SERVICE);
      if (imm != null) imm.hideSoftInputFromWindow(getRootView().getWindowToken(), 0);
    }
   });
}