Develop Reference

I want to open URL with webview, but when I tried to login in that site, I can't login

When I tried to login it shows a popup window and asking for email and password
when I entered my correct email and password and click on login it doesn't redirect to my account it only shows the same page
this is my MainActivity
you can also download my application for better understanding my problems https://play.google.com/store/apps/details?id=in.bidforx.bidforx
use email: anup.gorai.9835#gmail.com
password:78907890
private ProgressBar progressBar;
private WebView webView;
#SuppressLint("SetJavaScriptEnabled")
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
AppRate.with(this)
.setInstallDays(0)
.setLaunchTimes(3)
.setRemindInterval(0)
.monitor();
AppRate.showRateDialogIfMeetsConditions(this);
progressBar = (ProgressBar) findViewById(R.id.progressBar);
progressBar.setMax(100);
webView = (WebView) findViewById(R.id.webView);
webView.setWebViewClient(new WebViewClientDemo());
webView.setWebChromeClient(new WebChromeClientDemo(
));
webView.getSettings().setJavaScriptEnabled(true);
webView.getSettings().setAppCacheEnabled(true);
webView.loadUrl("https://bidforx.com");
if (Build.VERSION.SDK_INT>=21){
CookieManager.getInstance().setAcceptThirdPartyCookies(webView,true);
}else{ CookieManager.getInstance().setAcceptCookie(true);}
webView.getSettings().setSupportMultipleWindows(true);
webView.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
webView.setWebViewClient(new WebViewClient() {
public void onReceivedError(WebView webView, int errorCode, String description, String failingUrl) {
try {
webView.stopLoading();
} catch (Exception e) {
}
if (webView.canGoBack()) {
webView.goBack();
}
webView.loadUrl("about:blank");
AlertDialog alertDialog = new AlertDialog.Builder(MainActivity.this).create();
alertDialog.setTitle("Error");
alertDialog.setMessage("Check your internet connection and try again.");
alertDialog.setButton(DialogInterface.BUTTON_POSITIVE, "Try Again", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
finish();
startActivity(getIntent());
}
});
alertDialog.show();
super.onReceivedError(webView, errorCode, description, failingUrl);
}
});
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent myIntent=new Intent(Intent.ACTION_SEND);
myIntent.setType("text/plain");
String shareBody="Add World ";
String shareSub="Download the BidForx App and Buy everthing in 1% Download the App now https://play.google.com/store/apps/details?id=in.bidforx.bidforx";
myIntent.putExtra(Intent.EXTRA_TEXT,shareBody);
myIntent.putExtra(Intent.EXTRA_TEXT,shareSub);
startActivity(Intent.createChooser(myIntent,"Share using"));
}
});
}
private class WebViewClientDemo extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
#Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
progressBar.setVisibility(View.GONE);
progressBar.setProgress(100);
}
#Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
progressBar.setVisibility(View.VISIBLE);
progressBar.setProgress(0);
}
}
private class WebChromeClientDemo extends WebChromeClient {
public void onProgressChanged(WebView view, int progress) {
progressBar.setProgress(progress);
}
}
// on back pressed
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_BACK) && webView.canGoBack()) {
webView.goBack();
return true;
}
else {
finish();
}
return super.onKeyDown(keyCode, event);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
return true;
}
}

When I try to login, I am getting an error
"Uncaught TypeError: Cannot read property 'username' of null", source: https://bidforx.com/js/login.js (2)
There must be some problem in login.js line 2. In line 2 you try to call localStorage, and somehow you can login with browser but not with app.
I haven't tried it yet but you should allow WebView to use HTML5 local storage feature first and see if you can login with app.
webView.getSettings().setDomStorageEnabled(true);
and I think you should do the item checking like this:
if (localStorage.hasOwnProperty("username")) {
//
}
in order to prevent TypeError

How to generate error on Webview?

I developed a website for my entreprisee and I work almost exclusively with PHP
So the Java language (and android studio) is a really new for me
Despite this I have to create an APK to use the website (in order to block the android home on this site)
I would like to know how to generate errors in order to test this function
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl)
MainActivity.java
public class MainActivity extends AppCompatActivity {
WebView webView;
SwipeRefreshLayout swipe;
ProgressBar progressBar;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
progressBar = (ProgressBar) findViewById(R.id.awv_progressBar);
swipe = (SwipeRefreshLayout) findViewById(R.id.swipe);
LoadWeb();
progressBar.setMax(100);
progressBar.setProgress(1);
swipe = (SwipeRefreshLayout) findViewById(R.id.swipe);
swipe.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
#Override
public void onRefresh() {
webView.reload();
}
});
webView.setWebChromeClient(new WebChromeClient() {
public void onProgressChanged(WebView view, int progress) {
progressBar.setProgress(progress);
}
});
webView.setWebViewClient(new WebViewClient() {
#Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
progressBar.setVisibility(View.VISIBLE);
}
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
webView.loadUrl("file:///android_asset/error.html");
}
public void onPageFinished(WebView view, String url) {
//Don't show ProgressBar
progressBar.setVisibility(View.INVISIBLE);
//Hide the SwipeRefreshLayout
swipe.setRefreshing(false);
}
});
}
public void LoadWeb() {
webView = (WebView) findViewById(R.id.webView);
webView.getSettings().setJavaScriptEnabled(true);
webView.getSettings().setAppCacheEnabled(true);
webView.loadUrl("mysite.com");
swipe.setRefreshing(true);
}
#Override
public void onBackPressed() {
if (webView.canGoBack()) {
webView.goBack();
} else {
finish();
}
}
}

One way of doing this could be by adding a proxy(using app like fiddler) which returns custom error code as per your wish for all requests from your device.
In case you do not need specific error codes, just use a random system wide wifi proxy which actually does not exist. In this case, device will try sending data to this proxy but won't find it and you will get a callback in onReceivedError.

WebView is not loading webpage

I am using WebView for loading a website. But it is very slow and is leaking when specific websites are loaded.
I am loading WebView with the following code.
#Override
protected void onNewIntent(Intent intent) {
if (intent.getStringExtra("url") != null) {
webView.loadurl(intent.getStringExtra("url"));
}
}
But I am calling webView.loadUrl(Config.URL); (Config.URL may contain same url as specified above) in onCreate() method after initializing WebView with the following.
this.webView = (WebView) findViewById(R.id.wv);
this.webView.getSettings().setJavaScriptEnabled(true);
this.webView.getSettings().setLoadsImagesAutomatically(true);
this.webView.getSettings().setDomStorageEnabled(true);
this.webView.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
MyClient client = new MyClient(WebActivity.this, (ProgressBar)findViewById(R.id.progressBar));
webView.setWebViewClient(client);
Loading a from onCreate() is working fine (not fine, it's too slow). But
the same URL that is loading from onNewIntent() is not working!!!.
After I did this inonNewIntent() no URLs got loaded using
webView.loadurl() and the current page is getting immovable. ie. the
scrollbars are moving in WebView but page is not scrolling. I tested
the same URL in onCreate() and it is working.
For doing that I am passing url with
intent.putExtra("url", Config.URL+targetUrl);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_SINGLE_TOP);
with the pending intent from the notifications. Although it is working in some devices i.e Google Nexus. But it is not working on most of the phones.
I have
android:hardwareAccelerated="true"
Myclient
public class MyClient extends WebViewClient{
private Context context;
private Activity activity;
private Handler handler;
private Runnable runnable;
private ProgressBar viewBar;
private String ret,ret2;
public void setFirstLoad(boolean firstLoad) {
this.firstLoad = firstLoad;
}
private boolean firstLoad=false;
public MyClient(Activity activity, ProgressBar bar) {
this.context = activity.getApplicationContext();
this.activity = activity;
viewBar=bar;
handler=new Handler();
}
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
/*if (url.startsWith("tel:")) {
Intent intent = new Intent(Intent.ACTION_DIAL,
Uri.parse(url));
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(intent);
}else if(url.startsWith("http:") || url.startsWith("https:")) {
*//*view.setVisibility(View.GONE);
viewBar.setVisibility(View.VISIBLE);*//*
view.loadUrl(url);
}
return true;*/
if (Uri.parse(url).getHost().equals("www.somepage.com")) {
return false;
}
// Otherwise, the link is not for a page on my site, so launch another Activity that handles URLs
try {
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(intent);
Answers.getInstance().logShare(new ShareEvent()
.putContentId(Build.USER)
.putMethod(shareName(url))
.putContentName(contentDecode(url))
.putContentType("news_share"));
}catch (android.content.ActivityNotFoundException e){
Log.e("Activity not found",e.toString());
Toast.makeText(context,"Application not found",Toast.LENGTH_LONG).show();
}
return true;
}
#Override
public void onReceivedError(final WebView view, int errorCode, String description, final String failingUrl) {
//Clearing the WebView
try {
view.stopLoading();
} catch (Exception e) {
}
try {
view.clearView();
} catch (Exception e) {
}
if (view.canGoBack()) {
view.goBack();
}
view.loadUrl("about:blank");
//Showing and creating an alet dialog
AlertDialog.Builder alertDialog = new AlertDialog.Builder(activity);
alertDialog.setTitle("Error");
alertDialog.setMessage("No internet connection was found!");
alertDialog.setPositiveButton("Retry", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
view.loadUrl(failingUrl);
}
});
AlertDialog alert = alertDialog.create();
alert.show();
//Don't forget to call supper!
super.onReceivedError(view, errorCode, description, failingUrl);
}
#Override
public void onLoadResource(final WebView view, String url) {
super.onLoadResource(view, url);
//injectScriptFile(view, "js/script.js");
injectCSS(view,"css/style.css");
if (firstLoad){
firstLoad=false;
view.setVisibility(View.INVISIBLE);
viewBar.setVisibility(View.VISIBLE);
runnable=new Runnable() {
#Override
public void run() {
viewBar.setVisibility(View.GONE);
view.setVisibility(View.VISIBLE);
}
};
handler.postDelayed(runnable,2000);
}
// test if the script was loaded
// view.loadUrl("javascript:setTimeout(hideMe(), 200)");
}
/*#Override
public void onPageFinished(final WebView view, String url) {
//System.gc();
}*/
#Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
System.gc();
}
The question is: What is the problem when using loadurl() method in onNewIntent()?

Try this from where you loads webview
web.setWebViewClient(new WebViewClient() {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
return super.shouldOverrideUrlLoading(view, url);
}
});

You can use the webclient to handle the webview. Here I include the javascript with loading.
String aboutURL="YOUR URL";
final ProgressDialog pd = ProgressDialog.show(, "", "Please wait", true);
WebSettings settings=Webview.getSettings();
settings.setJavaScriptEnabled(true);
settings.setAppCacheEnabled(true);
settings.setDomStorageEnabled(true);
settings.setLoadsImagesAutomatically(true);
settings.setDatabaseEnabled(true);
settings.setRenderPriority(WebSettings.RenderPriority.HIGH);
settings.setCacheMode(WebSettings.LOAD_NO_CACHE);
settings.setSupportZoom(true);
settings.setBuiltInZoomControls(true);
Webview.setWebViewClient(new WebViewClient() {
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
Toast.makeText(activity, description, Toast.LENGTH_SHORT).show();
}
#Override
public void onPageStarted(WebView view, String url, Bitmap favicon)
{
pd.show();
}
#Override
public void onPageFinished(WebView view, String url) {
pd.dismiss();
}
});
Webview.loadUrl(aboutURL);
Here Loading is processed based on network

Use Handler to post a delay action as below will fix this, but I don't known why.
new Handler().post(webView.loadurl(url));

Why can't I get onPageStarted, onReceivedError, or onPageFinished to ever call with Android WebView?

I want to be able to recognize when an error occurs and tell show a toast message with the error but I can never get them to call.
I also want to be able to tell when the webview starts navigating to a url and detect which url it's going to.
Unfortunately it just seems to ignore everything and I have no idea how to start a function or method or anything once this occurs.I don't really care how I go about determining when a page starts loading or an error occurs I just need a way that works.
public class MainActivity extends AppCompatActivity {
private WebView myWebView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
myWebView = (WebView) findViewById(R.id.webview);
myWebView.setWebViewClient(new WebViewClient());
myWebView.setWebChromeClient(new WebChromeClient()
{
private boolean error;
public void onPageStarted(WebView view, String url, Bitmap favicon) {
onPageStarted(view, url, favicon);
Toast.makeText(getApplicationContext(), "page started:" + url, Toast.LENGTH_SHORT).show();
error = false;
}
public void onReceivedError( WebView view, int errorCode, String description, String failingUrl) {
error = true;
System.out.println("description error" + description);
view.setVisibility( View.GONE );
Toast.makeText(getApplicationContext(), "error:" + description, Toast.LENGTH_SHORT).show();
}
public void onPageFinished(WebView view, String url) {
if (!error) {
view.setVisibility( View.VISIBLE );
}
error = false;
Toast.makeText(getApplicationContext(), "page finished" + url, Toast.LENGTH_SHORT).show();
}
}
);
myWebView.setBackgroundColor(0);
WebSettings webSettings = myWebView.getSettings();
webSettings.setDefaultTextEncodingName("utf-8");
webSettings.setJavaScriptEnabled(true);
webSettings.setLoadWithOverviewMode(true);
webSettings.setAllowFileAccess(true);
// Other webview settings
myWebView.addJavascriptInterface(new MyJavascriptInterface(this), "Android");
myWebView.loadUrl("https://example.com/");
}
}

The onPageStarted(), onPageFinished(), and onReceivedError() methods are not defined in the WebChromeClient class. They're members of WebViewClient. You subclassed the wrong one.
If you add the #Override annotation above each method, your IDE should yell at you that those methods don't override anything in the super class, which is why that annotation is useful.
Simply move those overrides to the WebViewClient instance.
myWebView.setWebViewClient(new WebViewClient() {
private boolean error;
#Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
...
}
#Override
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
...
}
#Override
public void onPageFinished(WebView view, String url) {
...
}
}
);
myWebView.setWebChromeClient(new WebChromeClient());

Android webview custom error page

I am creating application that use WebView to access a online website. I am stuck where I have to add code to check availability of page.
public class SpartanWeb extends Activity {
WebView mWebView;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Adds Progrss bar Support
this.getWindow().requestFeature(Window.FEATURE_PROGRESS);
setContentView(R.layout.main);
// Makes Progress bar Visible
getWindow().setFeatureInt(Window.FEATURE_PROGRESS,
Window.PROGRESS_VISIBILITY_ON);
// Get Web view
mWebView = (WebView) findViewById(R.id.webView1);
WebSettings websettings = mWebView.getSettings();
websettings.setJavaScriptEnabled(true);
mWebView.stopLoading();
mWebView.clearCache(true);
mWebView.loadUrl("http://google.com");
mWebView.setHorizontalScrollBarEnabled(false);
mWebView.setScrollBarStyle(View.SCROLLBARS_OUTSIDE_OVERLAY);
mWebView.setWebViewClient(new WebViewClient());
mWebView.setDownloadListener(new DownloadListener() {
public void onDownloadStart(String url, String userAgent,
String contentDisposition, String mimetype,
long contentLength) {
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setData(Uri.parse(url));
startActivity(intent);
}
});
// onProgressChanged
final Activity MyActivity = this;
mWebView.setWebChromeClient(new WebChromeClient() {
public void onProgressChanged(WebView view, int progress) {
// bar disappear after URL is loaded, and changes string to
// Loading...
MyActivity.setTitle("Loading...");
MyActivity.setProgress(progress * 100); // Make the bar
// disappear after URL
// is loaded
// Return the app name after finish loading
if (progress == 100)
MyActivity.setTitle(R.string.app_name);
}
});
}// EOM oc
public boolean onKeyDown(int keyCode, KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_BACK) && mWebView.canGoBack()) {
mWebView.goBack();
return true;
}
return super.onKeyDown(keyCode, event);
}
}
I am trying to add onReceivedError but for some reason custom page is not loading.
/** Called when the activity is first created. */
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl)
{
mWebView.loadUrl("file:///android_asset/error.html");
}
Please advise what to do.

You can call loadErrorPage(view) function in the onReceivedError function.
The following code will load the error content you need to show.Here i am load the html file with loadDataWithBaseURL.
public void loadErrorPage(WebView webview){
if(webview!=null){
String htmlData ="<html><body><div align=\"center\" >"This is the description for the load fail : "+description+"\nThe failed url is : "+failingUrl+"\n"</div></body>";
webview.loadUrl("about:blank");
webview.loadDataWithBaseURL(null,htmlData, "text/html", "UTF-8",null);
webview.invalidate();
}
}

I added onReceivedError to mWebView.setWebViewClient(new WebViewClient so now it's working. Thanks for tips.
mWebView.setWebViewClient(new WebViewClient() {
#Override public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
mWebView.loadUrl("file:///android_asset/error.html");
} });

You can use the following code ..
public class TestResultWebclient extends WebViewClient {
ProgressDialog progressDialog;
#Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
if (progressDialog == null) {
progressDialog = new ProgressDialog(TermsAndCondsMrupeeActivity.this);
progressDialog.setMessage("Loading...");
progressDialog.show();
}
super.onPageStarted(view, url, favicon);
}
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
#Override
public void onPageFinished(WebView view, String url) {
if (progressDialog != null)
try {
if (progressDialog.isShowing()) {
progressDialog.dismiss();
progressDialog = null;
}
} catch (Exception exception) {
exception.printStackTrace();
}
super.onPageFinished(view, url);
}
}