Develop Reference

Open a link in the android browser (WebView)

I recently implemented the shouldInterceptRequest method to detect when the link "http://sitemercado.com.br/valida" clicked to open it in the android browser instead of opening internally in the webview until it worked the link is opened in the browser but when I come back for the webview application, it is also loaded, I would like it to load only in the browser.
My code is the following:
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
pb = (findViewById(R.id.pb));
mWebView = findViewById(R.id.webview);
mWebView.setListener(this, this);
mWebView.loadUrl("https://www.sitemercado.com.br/frade");
mWebView.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
mWebView.setWebViewClient(new WebViewClient(){
#Override
public void onReceivedError(WebView view, WebResourceRequest request, WebResourceError error) {
super.onReceivedError(view, request, error);
Intent i = new Intent(MainActivity.this, off.class);
startActivity(i);
overridePendingTransition(android.R.anim.fade_in, android.R.anim.fade_out);
finish();
}
});
mWebView.setWebViewClient(new WebViewClient(){
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (Uri.parse(url).getHost().equals("www.sitemercado.com.br/valida")) {
return true;
}
String valida = "https://www.sitemercado.com.br/valida";
Intent i = new Intent(Intent.ACTION_VIEW);
i.setData(Uri.parse(valida));
startActivity(i);
Toast.makeText(getApplicationContext(), "1Detectou", Toast.LENGTH_SHORT).show();
return false;
}
});
Where am I going wrong?

Unless I'm mistaken, the following is just wrong:
mWebView.setWebViewClient(new WebViewClient(){
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (Uri.parse(url).getHost().equals("www.sitemercado.com.br/valida")) {
return true;
}
String valida = "https://www.sitemercado.com.br/valida";
Intent i = new Intent(Intent.ACTION_VIEW);
i.setData(Uri.parse(valida));
startActivity(i);
Toast.makeText(getApplicationContext(), "1Detectou", Toast.LENGTH_SHORT).show();
return false;
}
});
You're getting the host of the URL, then comparing it to a full URL. That's never going to be equal.
Then you launch the link only if that statement is false? That's inverted, since you say in your question that you want it to launch in the browser only if the URL is /valida. The way you have it, no matter what URL you attempt to load, Android will launch a browser pointing to /valida.
Try this instead:
mWebView.setWebViewClient(new WebViewClient(){
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (Uri.parse(url).getPath().contains("valida")) {
Intent i = new Intent(Intent.ACTION_VIEW);
i.setData(Uri.parse(url));
startActivity(i);
Toast.makeText(getApplicationContext(), "1Detectou", Toast.LENGTH_SHORT).show();
return true;
}
return false;
}
});

Ajax not working in android webview

I am loading a website in webview,we have used Ajax in website and its working fine on web browser and mobile browser also but in android webview ajax is not working no error is there in the console.Here is my code:-
public class Activity_WebView extends AppCompatActivity implements
ConnectivityReceiver.ConnectivityReceiverListener {
WebView webview;
ProgressDialog pro_dialog;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_web_view);
webview = (WebView) findViewById(R.id.webview);
webview.getSettings().setPluginState(WebSettings.PluginState.ON);
webview.setWebViewClient(new loadinsame());
pro_dialog = new ProgressDialog(Activity_WebView.this);
webview.getSettings().setJavaScriptEnabled(true);
webview.getSettings().setDomStorageEnabled(true);
webview.getSettings().setAllowUniversalAccessFromFileURLs(true);
boolean connection = checkConnection();
if (connection) {
webview.loadUrl("website url");
} else {
Toast.makeText(Activity_WebView.this, "Sorry! Not connected to
internet", Toast.LENGTH_SHORT).show();
dialog_Show(webview, "Please check you Inernet connect and Reload.",
false);
}
}
#Override
public void onNetworkConnectionChanged(boolean isConnected) {
if (!isConnected) {
Toast.makeText(Activity_WebView.this, "Sorry! Not connected to
internet", Toast.LENGTH_SHORT).show();
}
}
private class loadinsame extends WebViewClient {
#Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
pro_dialog.setCancelable(false);
pro_dialog.setMessage("Loading...");
pro_dialog.show();
}
#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);
pro_dialog.dismiss();
}
#Override
public void onReceivedError(final WebView webview, WebResourceRequest
request, WebResourceError error) {
super.onReceivedError(webview, request, error);
pro_dialog.dismiss();
// dialog_Show(webview, "Error Occur, Do you want to Reload?", true);
}
}
#Override
public void onBackPressed() {
if (webview.canGoBack()) {
webview.goBack();
} else {
super.onBackPressed();
}
}
private boolean checkConnection() {
boolean isConnected = ConnectivityReceiver.isConnected();
return isConnected;
}
#Override
protected void onResume() {
super.onResume();
MyApplication.getInstance().setConnectivityListener(this);
}
}
when i inspect the website in chrome using emulator, find that my ajax remain pending and then cancel after sometime.
Thanks in advance.

Just promoting #Jeff Thomas comment, by setting
mWebView.getSettings().setDomStorageEnabled(true);
worked!!

When i enabled the java script, its working.
WebView myWebView = (WebView) findViewById(R.id.webview);
myWebView.loadUrl("");
myWebView.getSettings().setDomStorageEnabled(true);
myWebView.getSettings().setJavaScriptEnabled(true);
myWebView.setWebViewClient(new WebClient());

Solutions
If you want to load web url in WebView so you need follow my code It's code working fine and In web any type of script language used in web page.
public void webviewCallBack(String coverUrl) {
WebView WebView webView = (WebView) findViewById(R.id.web_view);
webView.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
webView.getSettings().setPluginState(WebSettings.PluginState.ON);
webView.getSettings().setAppCacheEnabled(true);
webView.getSettings().setDatabaseEnabled(true);
webView.getSettings().setDomStorageEnabled(true);
webView.getSettings().setBuiltInZoomControls(true);
webView.getSettings().setJavaScriptEnabled(true);
webView.clearView();
webView.measure(100, 100);
webView.getSettings().setUseWideViewPort(true);
webView.getSettings().setLoadWithOverviewMode(true);
webView.setWebViewClient(new WebViewClient() {
// For api level bellow 24
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
Log.d("weburl__", url);
if (url.startsWith("http") || url.startsWith("https")) {
// Return false means, web view will handle the link
return false;
} else if (url.startsWith("tel:")) {
// Handle the tel: link
handleTelLink(url);
// Return true means, leave the current web view and handle the url itself
return true;
}
return false;
}
// From api level 24
#RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
#Override
public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
// Get the tel: url
String url = request.getUrl().toString();
Log.d("weburl_____", url);
if (url.startsWith("http") || url.startsWith("https")) {
// Return false means, web view will handle the link
return false;
} else if (url.startsWith("tel:")) {
// Handle the tel: link
handleTelLink(url);
// Return true means, leave the current web view and handle the url itself
return true;
}
return false;
}
});
// Load the url into web view
webView.loadUrl(coverUrl);
hoadler();
}
public void hoadler() {
Runnable task = new Runnable() {
public void run() {
material_design_progressbar.setVisibility(View.VISIBLE);
}
};
worker.schedule(task, 5, TimeUnit.SECONDS);
}
I hope this code is helpful for you!

Here is how to edit the AndroidManifes.xml:
Find AndroidManifest.xml file in application folder at:
android/app/src/main/AndroidManifest.xml
Locate the application subelement.
Add the following tag:
android:usesCleartextTraffic=”true”
The application subelement should now look like:
<application
android:name=”io.flutter.app.Test”
android:label=”bell_ui”
android:icon=”#`enter code
here`mapmap/ic_launcher”
android:usesCleartextTraffic=”true”>
Save the AndroidManifest.xml file.

Don't navigate to other pages in WebView,disable links and references

I have a webView in Android, and I open a html webpage in it. But it's full of links and images, and when I click one of them, it loads in my webview. I want to disable this behaviour, so if I click on a link, don't load it. I've tried this solution and edited a bit for myselft, but not worked.
My webviewclient code:
private boolean loaded = false;
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if(loaded == false){
view.loadUrl(url);
loaded = true;
return true;
}else{
return false;
}
}
My webview implementation and settings.
WebView wv = (WebView) findViewById(R.id.recipeWv);
ourWebViewClient webViewClient = new ourWebViewClient();
webViewClient.shouldOverrideUrlLoading(wv, URLsave);
wv.setWebViewClient(webViewClient);
wv.setFocusableInTouchMode(false);
wv.setFocusable(false);
wv.setClickable(false);
WebSettings settings = wv.getSettings();
settings.setDefaultTextEncodingName("utf-8");
settings.setLoadWithOverviewMode(true);
settings.setBuiltInZoomControls(true);
Example: If the user open in my webview the StackOverflow homepage and clicks on one of the links(like "Questions") then the webview should stay on the StackOverflow homepage.

You should save in a class variable your current url and check if it's the same with the loaded one. When the user clicks on a link the shouldOverrideUrlLoading is called and check the website.
Something like this:
private String currentUrl;
public ourWebViewClient(String currentUrl) {
this.currentUrl = currentUrl;
}
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (url.equals(currentUrl)) {
view.loadUrl(url);
}
return true;
}
Important: don't forget set the WebViewClient to your WebView.
ourWebViewClient webViewClient = new ourWebViewClient(urlToLoad);
wv.setWebViewClient(webViewClient);

Implement a WebViewClient and Just return true from this method of WebView Client
webView.setWebViewClient(new WebViewClient(){
public boolean shouldOverrideUrlLoading(WebView view, String url) {
return true;
}
});

If you want to open inner link of a web page in different window then
Don't use
WebView webView;//Your WebView Object
webView.setWebViewClient(new HelpClient());// Comment this line
B'coz setWebViewClient() method is taking care of opening a new page in the same webview. So simple comment this line.
private class HelpClient extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (Uri.parse(url).getHost().equals("www.example.com")) {
// This is my web site, so do not override; let my WebView load the page
return false;
}
// Otherwise, the link is not for a page on my site, so launch another Activity that handles URLs
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
startActivity(intent);
return true;
}
}
Hope this will work.

Even I had been facing the same issue. I solved this issue like below
webView.setOnTouchListener(new View.OnTouchListener() {
#Override
public boolean onTouch(View v, MotionEvent event) {
return true;
}
});
With lambda expressions
webView.setOnTouchListener((v, event) -> true);

Note that the method signature changed in API 24.
For APIs earlier than 24 the second parameter is String and that signature is now deprecated.
For APIs 24 and later, the second parameter is WebResourceRequest.
If your app supports both pre and post API 24 and you want to disable all links you can use this:
webView.setWebViewClient(new WebViewClient(){
#Override //for APIs 24 and later
public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request){
return true;
}
#Override //for APIs earlier than 24
public boolean shouldOverrideUrlLoading(WebView view, String url){
return true;
}
});

You need to add an extra line of code, like so-
webview.loadUrl(url);
webview.setWebViewClient(new MyWebViewClient());
And add an additional class MyWebViewClient like this-
/* Class for webview client */
class MyWebViewClient extends WebViewClient {
// show the web page in webview but not in web browser
#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);
}
#Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
}
#Override
public void onLoadResource(WebView view, String url) {
super.onLoadResource(view, url);
}
}

Using inject javascript On #Override onPageFinished
view.loadUrl("javascript: (function () {document.addEventListener('click', function (e) {e.stopPropagation();}, true);})()");

Very similar to Amit Gupta's answer, but I found a shorter way to do it.
private String currentUrl;
public CustomWebViewClient(String currentUrl) {
this.currentUrl = currentUrl;
}
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
return ! url.equals(currentUrl);
}
After this CustomWebViewClient is defined, set the client to the webview.
CustomWebViewClient webViewClient = new CustomWebViewClient(urlToLoad);
wv.setWebViewClient(webViewClient);

Android WebView setting download folder location

I've added a webview activity and would like to control which folder any downloaded that my end users will download via my app. The files will be pdf files and I would like them to go into a specific folder that my app uses rather than the default download folder.
public class myweb extends Activity {
private WebView myWebView;
private String LOG_TAG = "AndroidWebViewActivity";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.knitweb);
myWebView = (WebView) findViewById(R.id.webView1);
//enable Javascript
myWebView.getSettings().setJavaScriptEnabled(true);
//loads the WebView completely zoomed out
myWebView.getSettings().setLoadWithOverviewMode(true);
//true makes the Webview have a normal viewport such as a normal desktop browser
//when false the webview will have a viewport constrained to it's own dimensions
myWebView.getSettings().setUseWideViewPort(true);
//override the web client to open all links in the same webview
myWebView.setWebViewClient(new MyWebViewClient());
myWebView.setWebChromeClient(new MyWebChromeClient());
//Injects the supplied Java object into this WebView. The object is injected into the
//JavaScript context of the main frame, using the supplied name. This allows the
//Java object's public methods to be accessed from JavaScript.
myWebView.addJavascriptInterface(new JavaScriptInterface(this), "Android");
//load the home page URL
//myWebView.loadUrl("http://demo.mysamplecode.com/Servlets_JSP/pages/androidWebView.jsp");
myWebView.loadUrl("http://www.patonsyarns.com/pattern.php?PID=4521&cps=21191");
myWebView.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);
}
});
}
private class MyWebViewClient extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (Uri.parse(url).getHost().equals("demo.mysamplecode.com")) {
return false;
}
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
startActivity(intent);
return true;
}
}
private class MyWebChromeClient extends WebChromeClient {
//display alert message in Web View
#Override
public boolean onJsAlert(WebView view, String url, String message, JsResult result) {
Log.d(LOG_TAG, message);
new AlertDialog.Builder(view.getContext())
.setMessage(message).setCancelable(true).show();
result.confirm();
return true;
}
}
public class JavaScriptInterface {
Context mContext;
// Instantiate the interface and set the context
JavaScriptInterface(Context c) {
mContext = c;
}
//using Javascript to call the finish activity
public void closeMyActivity() {
finish();
}
}
//Web view has record of all pages visited so you can go back and forth
//just override the back button to go back in history if there is page
//available for display
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_BACK) && myWebView.canGoBack()) {
myWebView.goBack();
return true;
}
return super.onKeyDown(keyCode, event);
}
I do not know in advance which files the users will be downloading other than that they will be pdf files.
Any help would be great
Thanks

I’m affraid the only solution is to use DownloadListener to catch the event and download the file manually.
Download a file example: http://www.androidhive.info/2012/04/android-downloading-file-by-showing-progress-bar/
DownloadListener example: How do I use DownloadListener?

Facebook login button on Android Webview redirects to a blank page

I'm trying to use a facebook login button that uses JS Facebook SDK on Android Webview. When I click it open a new page and redirects to https://www.facebook.com/dialog/oauth... which is a blank page with a javascript code. And the webview stays here.
I'm using:
webview.getSettings().setJavaScriptEnabled(true);
webview.getSettings().setAppCacheEnabled(true);
webview.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
Thank you!

You need to add logic to redirect back to the original url of your website.
In order to do this, you need to first create a new java class that extends the WebViewClient class and overrides the onPageFinished method like this:
public class CustomWebViewClient extends WebViewClient
{
#Override
public void onPageFinished(WebView view, String url) {
//https://www.facebook.com/dialog/permissions.request
//actually works for me, but I put the URL you say is coming up
//blank in there instead, whatever works for you:
if(url.startsWith("https://www.facebook.com/dialog/oauth")){
String redirectUrl = "http://www.mydomain.com/MyApp/";
view.loadUrl(redirectUrl);
return;
}
super.onPageFinished(view, url);
}
}
Second, just add it to your WebView:
webview.setWebViewClient(new CustomWebViewClient());
Once that page is finished loading, it will redirect back to your original page

I dont know what exactly i did at that time, but the problem was solved. I'll give you the code. Try finding out :)
WebView browser,mWebviewPop;
private void open(){
browser = (WebView)findViewById(R.id.webView1);
browser.getSettings().setLoadsImagesAutomatically(true);
browser.getSettings().setJavaScriptEnabled(true);
browser.getSettings().setAppCacheEnabled(true);
browser.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
browser.getSettings().setSupportMultipleWindows(true);
browser.setWebViewClient(new MyBrowser());
browser.setWebChromeClient(new MyCustomChromeClient());
mContext=this.getApplicationContext();
browser.loadUrl(target_url);
MainActivity.this.progressBar.setProgress(0);
browser.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);
}
});
}
private class MyBrowser extends WebViewClient {
String redirectUrl = "MY URL";
private void noInternet() {
WebView webview = (WebView) findViewById(R.id.webView1);
RelativeLayout tryAgainLayout = (RelativeLayout)findViewById(R.id.tryAgainLayout);
RelativeLayout progressLayout = (RelativeLayout)findViewById(R.id.progressLayout);
tryAgainLayout.setVisibility(View.VISIBLE);
webview.setVisibility(View.GONE);
webview.destroy();
progressLayout.setVisibility(View.INVISIBLE);
}
public void visible(){
WebView webview = (WebView) findViewById(R.id.webView1);
RelativeLayout tryAgainLayout = (RelativeLayout)findViewById(R.id.tryAgainLayout);
RelativeLayout progressLayout = (RelativeLayout)findViewById(R.id.progressLayout);
tryAgainLayout.setVisibility(View.INVISIBLE);
webview.setVisibility(View.INVISIBLE);
progressLayout.setVisibility(View.VISIBLE);
}
public void unvisible(){
WebView webview = (WebView) findViewById(R.id.webView1);
RelativeLayout tryAgainLayout = (RelativeLayout)findViewById(R.id.tryAgainLayout);
RelativeLayout progressLayout = (RelativeLayout)findViewById(R.id.progressLayout);
tryAgainLayout.setVisibility(View.INVISIBLE);
webview.setVisibility(View.VISIBLE);
progressLayout.setVisibility(View.INVISIBLE);
}
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
String host = Uri.parse(url).getHost();
if (host.equals(target_url_prefix))
{
if(mWebviewPop!=null)
{
mWebviewPop.setVisibility(View.GONE);
baseLayout.removeView(mWebviewPop);
mWebviewPop=null;
}
return false;
}
if(host.equals("m.facebook.com"))
{
return false;
}
view.loadUrl(url);
return true;
}
#Override
public void onReceivedError(WebView view, int errorCode,
String description, String failingUrl) {
noInternet();
}
#Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
visible();
}
#Override
public void onPageFinished(WebView view, String url) {
unvisible();
System.out.println("\n" +view.getUrl());
if(url.startsWith("https://m.facebook.com/v2.1/dialog/oauth")){
if(mWebviewPop!=null)
{
mWebviewPop.setVisibility(View.GONE);
baseLayout.removeView(mWebviewPop);
mWebviewPop=null;
}
view.loadUrl(redirectUrl);
return;
}
super.onPageFinished(view, url);
}
}
private class MyCustomChromeClient extends WebChromeClient
{
#Override
public boolean onCreateWindow(WebView view, boolean isDialog,
boolean isUserGesture, Message resultMsg) {
mWebviewPop = new WebView(mContext);
mWebviewPop.setVerticalScrollBarEnabled(false);
mWebviewPop.setHorizontalScrollBarEnabled(false);
mWebviewPop.setWebViewClient(new MyBrowser());
mWebviewPop.getSettings().setJavaScriptEnabled(true);
mWebviewPop.getSettings().setSavePassword(false);
mWebviewPop.setLayoutParams(new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
ViewGroup.LayoutParams.MATCH_PARENT));
baseLayout.addView(mWebviewPop);
WebView.WebViewTransport transport = (WebView.WebViewTransport) resultMsg.obj;
transport.setWebView(mWebviewPop);
resultMsg.sendToTarget();
return true;
}
#Override
public void onCloseWindow(WebView window) {
}
#Override
public void onProgressChanged(WebView view, int newProgress) {
MainActivity.this.setValue(newProgress);
super.onProgressChanged(view, newProgress);
}
}

OK so from what I can tell, what's happening here is that there are two "ways" for oauth to work, either it will call back "to aparent page" (like popup "log me in" that disappears), or it can redirect you to a login page, then to some other url (non popup style), after success or failure (kind of a chain forward). Unfortunately it appears WebView is not well suited for the "callback to the parent page" style, so you have to do some shenanigans like have a second WebView (jincy's answer here, or see also this).