How to use private url in webView? - android

I am using webView in my Android app for playing private videos that mean users must not be able to get the URL from the webView even if some error occurs. But when an error occurs as server error etc then webView shows the url- 'can't load URLs www.example.com' Now how to prevent this. Below is my code.
String uri = "https://example.com";
webView.setWebViewClient(new WebViewClient() {
#RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
#Override
public boolean shouldOverrideUrlLoading(WebView webView, WebResourceRequest request) {
webView.loadUrl(request.getUrl().toString());
return true;
}
});
WebSettings webSettings = webView.getSettings();
webSettings.setJavaScriptEnabled(true);
webView.loadData(vimeoVideo, "text/html", "utf-8");

You can try something like this:
boolean isPageError = false;
webView.setWebViewClient(new WebViewClient() {
#Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
isPageError = false;
}
#Override
public void onPageFinished(WebView view, String url) {
if (isPageError){
webview.setVisibility(View.GONE);
txt_error.setVisibility(View.VISIBLE);
txt_error.setText("error message");
}
}
#Override
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
isPageError = true;
}
});
Basically make your own custom error page and display it. Hope this helps.

use this :
webView.setWebViewClient(new WebViewClient() {
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
// show custom message error here
}
});

Related

android - Sometimes get '502 Bad Gateway' in WebView

I got '502 Bad Gateway' from WebViewClient' onReceivedHttpError, and then there is just one message: "the specified cgi application encountered an error and the server terminated the process." showing in WebView without any content.
I got this issue after re-opened the WebView many times, but the link work fine on PC browser. When I re-install the application, it shown normal content in the first few times.
I tried to change WebSettings below, but still not work.
#SuppressLint("SetJavaScriptEnabled")
private void settingWebView() {
final WebSettings settings = webView.getSettings();
// js
settings.setJavaScriptEnabled(true);
// ui control
settings.setSupportZoom(true);
settings.setBuiltInZoomControls(true);
settings.setDisplayZoomControls(false);
// cache
settings.setCacheMode(WebSettings.LOAD_NO_CACHE);
settings.setDomStorageEnabled(true);
settings.setDatabaseEnabled(true);
// others
settings.setMixedContentMode(WebSettings.MIXED_CONTENT_COMPATIBILITY_MODE);
// web view
webView.setHorizontalScrollBarEnabled(false);
webView.setInitialScale(100);
// client
webView.setWebViewClient(new WebViewClient() {
#Override
public void onReceivedHttpError(WebView view, WebResourceRequest request, WebResourceResponse errorResponse) {
super.onReceivedHttpError(view, request, errorResponse);
Log.e(TAG, "onReceivedHttpError: " + errorResponse.getStatusCode());
Log.e(TAG, "onReceivedHttpError: " + errorResponse.getReasonPhrase());
}
#Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
progressBar.setVisibility(View.VISIBLE);
}
#Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
progressBar.setVisibility(View.GONE);
}
});
webView.setWebChromeClient(new WebChromeClient() {
#Override
public boolean onConsoleMessage(ConsoleMessage consoleMessage) {
return true;
}
});
webView.loadUrl(DevelopUtil.TACTICS_WEB_VIEW);
}
Do anybody knows what is the problem ?
Is it server error or my WebView setting error ?
try this it worked for me
WebViewClient webClient = new WebViewClient() {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
return super.shouldOverrideUrlLoading(view, url);
}
#Override
public void onFormResubmission(WebView view, Message dontResend,
Message resend) {
// TODO Auto-generated method stub
super.onFormResubmission(view, dontResend, resend);
}
#Override
public void onLoadResource(WebView view, String url) {
super.onLoadResource(view, url);
if (url.contains("purchasehistory.html")) {
// mURLNavigation.onURLNavigation(3);
}
}
#Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
}
};

WebView: How to load .php file in the 8.0 WebView

i am trying load a .php file in WebView. it was working properly before API level 28 after i updated to API level 28 its not working its showing white screen. nothing is showing i tried all the options.
Here is the code
I am added the safe browsing false in the manifest file also.
I tried searching in the google nothing is helped me if any one done please help in this case to resolve.
String url="https://xxx/xxx/abc.php";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
handleSSLHandshake();
WebView mWebView = (WebView) findViewById(R.id.webView);
// PackageInfo webViewPackageInfo = null;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
// webViewPackageInfo = WebView.getCurrentWebViewPackage();
mWebView.getSettings().setSafeBrowsingEnabled(false);
// Log.d("MY_APP_TAG", "WebView version: " + webViewPackageInfo.versionName);
}
WebViewClientImpl webViewClient = new WebViewClientImpl(this);
mWebView.setWebViewClient(webViewClient);
mWebView.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
mWebView.getSettings().setBuiltInZoomControls(false);
mWebView.getSettings().setJavaScriptEnabled(true);
mWebView.loadUrl(url);
if (18 < Build.VERSION.SDK_INT ){
//18 = JellyBean MR2, KITKAT=19
mWebView.getSettings().setCacheMode(WebSettings.LOAD_NO_CACHE);
}
}
public class WebViewClientImpl extends WebViewClient {
private Activity activity = null;
public WebViewClientImpl(Activity activity) {
this.activity = activity;
}
#Override
public boolean shouldOverrideUrlLoading(WebView webView, String url) {
webView.loadUrl(url);
// Log.i(TAG,url);
return true;
}
#Override
public void onLoadResource(WebView view, String url) {
super.onLoadResource(view, url);
}
#Override
public void onReceivedError(WebView view, WebResourceRequest request, WebResourceError error) {
super.onReceivedError(view, request, error);
}
#Override
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
super.onReceivedError(view, errorCode, description, failingUrl);
}
#Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
}
#Override
public void onPageFinished(WebView view, String url) {
}
}
I solved my problem. it was the certificates issues, i just added the following code, its working fine now
#TargetApi(Build.VERSION_CODES.N)
#Override
public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
view.loadUrl(request.getUrl().toString());
return true;
}
#Override
public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) {
handler.proceed();
}

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());

How to know if webView started rendering in android

I am loading a pdf in WebView.
WebView webView = new WebView(this);
webView.getSettings().setJavaScriptEnabled(true);
webView.getSettings().setPluginState(WebSettings.PluginState.ON);
webView.setWebViewClient(new WebViewClient());
String url = "http://drive.google.com/viewerng/viewer?embedded=true&url=http://" + getIntent().getStringExtra("url");
webView.loadUrl(url);
setContentView(webView);
Whenever the activity is started, WebView is shown blank. But I want to show a progress dialog till the WebView starts rendering pdf file. How can I add a listener to the WebView indicating that the files has been started visible to the user.
public class FGWebViewClient extends WebViewClient {
private WebViewClient wvc;
private static final String TAG=FGWebViewClient.class.getCanonicalName();
ProgressDialog mProgressDialog;
// when you add the webviewclient then show the progressDialog.
public FGWebViewClient(Context context) {
Log.i(TAG, "FGWebViewClient Called...");
this.wvc=wvc;
mProgressDialog=new ProgressDialog(context);
mProgressDialog.setMessage("URL Loading...");
mProgressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
mProgressDialog.setCanceledOnTouchOutside(false);
if(mProgressDialog!=null){
mProgressDialog.show();
}
}
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
Log.i(TAG,"shouldOverrideUrlLoading");
return wvc.shouldOverrideUrlLoading(view, url);
}
#Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
Log.i(TAG,"onPageStarted");
wvc.onPageStarted(view, url, favicon);
}
// OnpageFinished just dismiss the progressDialog.
#Override
public void onPageFinished(WebView view, String url) {
if(mProgressDialog!=null&&mProgressDialog.isShowing()){
mProgressDialog.dismiss();
mProgressDialog=null;
}
Log.i(TAG,"onPageFinished");
//To clear cache of webview
//view.clearCache(true);
//clearEveryThing(view);
wvc.onPageFinished(view,url);
}
and call like this
WebView webView=(WebView)v.findViewById(R.id.webView1);
FGWebViewClient webViewClient= new FGWebViewClient(context);
webView.setWebViewClient(webViewClient);
webView.setWebChromeClient(new WebChromeClient());
webView.clearCache(true);
webView.clearHistory();
webView.getSettings().setJavaScriptEnabled(true);
webView.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
webView.loadUrl((webUrl).toString());
You can use setWebViewClient and display showProgress as below code
WebSettings settings = webView.getSettings();
settings.setJavaScriptEnabled(true);
settings.setPluginState(WebSettings.PluginState.ON);
webView.setScrollBarStyle(WebView.SCROLLBARS_OUTSIDE_OVERLAY);
showProgress();
webView.setWebViewClient(new WebViewClient() {
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
public void onPageFinished(WebView view, String url) {
hideProgress();
}
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
hideProgress();
}
});
String url = "http://drive.google.com/viewerng/viewer?embedded=true&url=http://" + getIntent().getStringExtra("url");
webView.loadUrl(url);
You could create custom class and extend it with WebViewClient. Then override method onPageStarted where you could consider that it started rendering. For e.g :
private class CustomWebClient extends WebViewClient {
#Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
showProgress();
}
#Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
dismissDialog();
}
}

Restricting WebView to one page only

Is it possible to restrict WebViews so that when you have let's say one webview for website but you just want the view to stick to that page and only that page?
Great example is I have a twitter WebView that is following a tag. I just want the user to be able to follow that tag not be able to go deeper into twitter stuff.
It's already a pre-set link,
Button--> opens web view with set link to twitter.
So has to be some kind of check for on press or something like I think.
something like this should do it.
myWebView = (WebView) findViewById(R.id.webview);
myWebView.setWebViewClient(new WebViewClient() {
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if(url.contains("somedomain.com")) {
view.loadUrl(url);
}
return true;
}
});
In-fact the above is a good solution but if you want an elaborate one. Try this one. I don't know whether this is proper solution for your query. play around with this.
webview.setWebViewClient(new MyWebViewClient());
private class MyWebViewClient extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
return true;
}
#Override
public void onReceivedError(WebView view, int errorCode,
String description, String failingUrl) {
super.onReceivedError(view, errorCode, description, failingUrl);
}
#Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
if(!url.equals("your_domain_name.com/")){
setResult(RESULT_OK);
finish();
}
}
#Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
if(!url.equals("your_domain_name.com/")){
finish();
}
}
#Override
public void onTooManyRedirects(WebView view, Message cancelMsg,
Message continueMsg) {
super.onTooManyRedirects(view, cancelMsg, continueMsg);
cancelMsg.sendToTarget();
}
}

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