Please note that this question is not a duplicate of How to display some part of webpage in android webview? or Android WebView: display only some part of website as they exclude some element whereas i want to include only one.
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
boolean validate=checkIfNet();
if(!validate){
finish();
}
setContentView(R.layout.activity_main);
WebView wb = (WebView) findViewById(R.id.webview);
wb.getSettings().setJavaScriptEnabled(true);
wb.getSettings().setLoadWithOverviewMode(true);
wb.getSettings().setUseWideViewPort(true);
wb.getSettings().setJavaScriptEnabled(true);
wb.getSettings().setBuiltInZoomControls(false);
wb.getSettings().setPluginState(WebSettings.PluginState.ON);
//wb.getSettings().setPluginsEnabled(true);
//wb.setWebViewClient(new HelloWebViewClient());
wb.loadUrl("http://www.dota2.com/leaderboards#europe");
}
private boolean checkIfNet() {
boolean connected = false;
ConnectivityManager connectivityManager = (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
if(connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).getState() == NetworkInfo.State.CONNECTED ||
connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI).getState() == NetworkInfo.State.CONNECTED) {
//we are connected to a network
connected = true;
}
else
connected = false;
return connected;
}
}
Now while getting http://www.dota2.com/leaderboards#europe it gets the full page. I only want the table in there. The one with tbody id="leaderboard_body". I am kind of new so pls chill on me. Thanks in advance.
Actually what you want to achieve technically is to remove some parts of the html.
What happens is that your webview will get all of the content of the URL you provided to it, this is inherent on how http works. The webview class doesn't let you choose to show only a specific part of the html, so what you must do is to remove what you don't want before rendering using javascript.
If you want to show it using a webview then the solutions in your post are what you want, if you want to parse the html and render it using Android UI classes then the jsoup solutions are what you want(however this is a bit overkill).
If you're really new to this my tip is: use an API. Probably something like https://docs.opendota.com/. The way virtually all apps(and websites) that are not static works is by using APIs. Here is an introduction on why you would want to do so instead of parsing with jsoup.
Related
I am working on a task in which we need to put one of our HTML & JS based project inside a JavaFX project or any other suitable containers which are out there. The purpose is to create an app, which can directly be deployed and would prevent any users from checking out the source code of HTML & JS.
Some time back when I was checking out JavaFX, I read that it supports JS, and JS can be used with it. Is there any way to create a container inside which I can put my HTML&JS files by giving path, etc?
How can I go about this? Whatever I am trying to do, what is it called. Any help, pointers, suggestions, would be nice.
Initial test
public class Main extends Application {
private Scene scene;
MyBrowser myBrowser;
#Override
public void start(Stage primaryStage) throws Exception{
primaryStage.setTitle("Test web");
myBrowser = new MyBrowser();
scene = new Scene(myBrowser, 1920, 1200);
primaryStage.setScene(scene);
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}
class MyBrowser extends Region {
final String hellohtml = "hello.html";
WebView webView = new WebView();
WebEngine webEngine = webView.getEngine();
public MyBrowser(){
URL urlHello = getClass().getResource("hello.html");
webEngine.load(urlHello.toExternalForm());
getChildren().add(webView);
}
}
As #sillyfly suggested use a WebView:
File f = new File(..);
// ..
final WebView webview = new WebView();
webview.getEngine().load(f.toURI().toURL().toString());
The hard part for me is always to figure out the right location to be used to reference the file.
Another option is when you have the HTML in the form of a string to load that as content:
String html = ...
webview.getEngine().loadcontent(html)
Be sure to check out at least the JavaDoc on WebView and WebEngine`
I have two activity, one main activity(A) is an CordovaActivity, then I use intent to start another activity(B), in B i have an WebView(not CordovaActivity), and after I use this webview to load a simple webpage (alert something), I found the js code is not executed at all, even if I enable javascript by calling setttings.setJsenabel(true);
I start activity B from A
Load Url from webview in Activity B
simple web page
in the device, it does not alert anything
However, if I change the webview to CordovaWebView instead of the original Android native one, it works.....
That's because plain WebView doesn't support showing alerts by itself. You need to provide a WebChromeClient to it that implements WebChromeClient.onJsAlert method. For example:
mywebView.setWebChromeClient(new WebChromeClient() {
#Override
public boolean onJsAlert(
WebView view, String url, String message, final JsResult result) {
new AlertDialog.Builder(view.getContext())
.setTitle("Alert")
.setMessage(message)
.setPositiveButton("Ok",
new AlertDialog.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
result.confirm();
}
}).setCancelable(false).create().show();
return true;
}
});
So, reading around i read that i could "inject" javascript into a loaded webpage to programatically fill a website's form, so i tried the following:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
WebView WebView;
WebView = (WebView) findViewById(R.id.webview);
WebView.setWebViewClient(new HelloWebViewClient());
WebView.getSettings().setJavaScriptEnabled(true);
WebView.getSettings().setBlockNetworkImage(false);
WebView.loadUrl("http://www.kingsage.es");
String username = "XXX";
String Password = "YYY";
WebView.loadUrl("javascript:document.getElementById('login_player').value='"+username+"';javascript:document.getElementById('login_passwd').value = '"+Password+"';");
}
However, when i run this on the emulator i get an error as if the website could not be found. if i turn off the second loadUrl method i load the website, but i need to fill the login form programatically!, i figure i am doing something wrong but i haven't found and answer reading around. Any help would be appreciated!!
you need to wait until the webpage is loaded (use WebViewClient) then execute your javascript
webView.setWebViewClient(new WebViewClient(){
#Override
public void onPageFinished (WebView webView, String url)
{
webView.loadUrl("javascript:document.getElementById('login_player').value='"+username+"';javascript:document.getElementById('login_passwd').value = '"+Password+"';");
}
});
make also sure that you execute only once, not on every onPageFinished Event
I like JeanLuc's suggestion and it worked for me 98% of the way. I still needed to automatically log the user into the web page once their username and password had been entered so I did the following and its worked well, except for trying to remove the "do you want to remember the password' message.
#Override
public void onPageFinished (WebView webView, String url)
{
webView.loadUrl("javascript:document.getElementById('Login1_UserName').value='"+userName+"';javascript:document.getElementById('Login1_Password').value = '"+password+"';");
webView.loadUrl("javascript:document.getElementById('Login1_LoginButton').click();");
}
The second line selected the 'login' button and logged them in automatically. Hope it helps someone else.
Here is how I acheived it in my scenario where I had to browse a page, fill text boxes and submit.
WebView webView = FindViewById<WebView>(Resource.Id.webEspView);
webView.SetWebViewClient(new Client());
webView.Settings.JavaScriptEnabled = true;
webView.LoadUrl("http://192.168.4.1")
Then added the Client class and overloaded onPageFinished() method.
public class Client : WebViewClient
{
public override void OnPageFinished(WebView view, string url)
{
base.OnPageFinished(view, url);
string ssid = Variables.GetInitialUsername();
ssid = ssid.Trim(new char[] {'\"'});
string pass = Variables.GetInitialPassword();
var script = $"document.getElementById(\"clientId\").value = \"{ssid}\";" +
$"document.getElementById(\"branchId\").value = \"{pass}\";" +
"document.querySelector('button[type=\"submit\"]').click()";
view.LoadUrl($"javascript: {script}");
}
}
Hope it helps.
I have a website/web app built with jquery mobile that I am trying to package into a webview for android; I am able to load up the pages locally by putting the whole site into the assets folder and loading the url like so:
mWebView.loadUrl("file:///android_asset/www/btec/index.html");
One of the pages is a gallery/slideshow of images that flips through automatically using javascript. However, if I navigate to my gallery from index.html, the images dont load. If I load it directly (i.e. load it directly into the webview with:
mWebView.loadUrl("file:///android_asset/www/btec/gallery.html");
the images appear and scroll no problem! I'm not sure why this is happening. Is there a setting I need to enable/disable? I have the following settings enabled already:
mWebView.getSettings().setJavaScriptEnabled(true);
mWebView.getSettings().setAllowFileAccess(true);
mWebView.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
mWebView.getSettings().setLoadsImagesAutomatically(true);
mWebView.getSettings().setPluginsEnabled(true);
This a trick that probably solves your problem.
1) Create a WebViewClient class, overriding shouldOverrideUrlLoading method:
private class MyClient extends WebViewClient {
private WebView mwv;
public MyClient(WebView v) {
mwv = v;
}
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if(url.equals("file:///android_asset/www/btec/gallery.html")) {
mwv.loadUrl(url);
return true;
}
return false;
}
}
2) Associate this client to your webview:
mWebView.setWebViewClient(new MyClient(mWebView));
Probably not the best way; but I think it works... ;)
EDIT: for other details, you can see this: http://developer.android.com/reference/android/webkit/WebViewClient.html
I have a webservice that I am trying to authenticate with in the background using a webview. When I initially send the request it will work appropriately (failure/success based on credentials), but after it seems like I am getting a cached response.
Here is my webview setup code:
WebView browser = new WebView(this);
WebSettings settings = browser.getSettings();
settings.setJavaScriptEnabled(true);
settings.setSavePassword(false);
settings.setCacheMode(WebSettings.LOAD_NO_CACHE);
settings.setAppCacheEnabled(false);
browser.setWebChromeClient(new WebChromeClient() {
public void onProgressChanged(WebView view, int progress) {
Log.d("BROWSERPROGRESS", Integer.toString(progress));
}
});
jsInterface = new AddAccountJSInterface();
browser.addJavascriptInterface(jsInterface, "ADDACCOUNTJSINTERFACE");
browser.setWebViewClient(new AddAccountClient(this));
So as you may see I have two additional classes controlling my webView:
An object that provides an interface for javascript (AddAccountJSInterface)
A WebViewClient
Additionally I do have a WebChromeClient, but it's only there for debugging and I'm pretty sure that it won't interfere with anything.
The JS interface simply provides an easy way of getting the body HTML for performing analysis, so I'm confident that isn't the issue either.
The WebViewClient has the following code in it which does most of the "custom" work for routing based on various responses from the webservice.
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if(url.contains(INSTALL_PREFIX)) {
HashMap<String, String> params = extractParameters(url);
verificationComplete(params);
return true;
}
return false;
}
#Override
public void onPageFinished(WebView view, String url){
if(invalidShop(view)) {
Toast.makeText(context, context.getString(R.string.no_find_shop), Toast.LENGTH_SHORT).show();
shopAddressField.requestFocus();
replaceUiElements(loadingBar, addAccountButton);
} else if(url.contains(ADMIN_AUTH_LOGIN)) {
if(invalidLogin(view)) {
Toast.makeText(context, context.getString(R.string.invalid_login),Toast.LENGTH_SHORT).show();
emailField.requestFocus();
replaceUiElements(loadingBar, addAccountButton);
} else {
String email = emailField.getText().toString();
String password = passwordField.getText().toString();
String submitJS = String.format(FORM_SUBMISSION_JS, email, password);
jsInterface.setInnerHTML("");
browser.loadUrl(submitJS);
}
}
}
In my activity I have 3 text fields that I need to fill followed by clicking a button to submit it. The activity then takes in the data from 3 text fields (shopAddressField, usernameField, passwordField) and then executes some javascript that populates some form data (which was loaded in the invisible webView) then clicks the submit button.
It is the last part that is messing up, which appears to be caching the response from the server (perhaps using cookies?) and return that instead of asking the server if the data is correct or not.
A bit of clarification:
JSInterface is simply a Java object that allows me to execute javascript on my webview which is tied to a function within that object. In my case my JSInterface has one function which is setInnerHtml(String html).
This is the javascript that is executed on the webview:
javascript:window.ADDACOUNTJSINTERFACE.setInnerHTML(document.body.innerHTML)
And this is the setInnerHtml function:
public void setInnerHtml(String innerHtml) {
this.innerHtml = innerHtml;
}
So when I actually execute jsInterface.setInnerHtml("") I'm just over-writing the HTML that was pulled in (to be sure I'm not getting my old data from there for some reason).
As for my submitJS it is once again some Javascript that is executed on my webView as follows:
// submitJS will be something like this once all the credentials have been set
// Note: I know that the server will make jQuery available
// Note: Much of the Java string formatting has been removed to help clarify
// the code.
String submitJS =
"javascript:(function() {
$('login-input').value='username';
$('password').value='password';
$('sign-in-form').up().submit();
})()"
// I then simply get the webview to execute the javascript above
webView.loadData(submitJS);
So it turns out the problem wasn't based around the Caching, and possibly not cookies.
When executing javascript on your webView it does this in a separate thread and can be quite slow. This lead to a race condition which caused code to be executed in the wrong order.
I've solved this problem by using a Semaphore as a Mutex. This allows me to prevent my getter from returning before the Javascript on the webView is able to execute.
The interface I created now looks like this:
private class AddAccountJSInterface {
private final String TAG = getClass().getName().toUpperCase();
private Semaphore mutex = new Semaphore(1, false);
private String innerHTML;
public void aquireSemaphore() {
Log.d(TAG, "Attempting to lock semaphore");
try {
mutex.acquire();
} catch(InterruptedException e) {
Log.d(TAG, "Oh snap, we got interrupted. Just going to abort.");
return;
}
Log.d(TAG, "Semaphore has been aquired");
}
#SuppressWarnings("unused")
public void setInnerHTML(String html) {
this.innerHTML = html;
Log.d(TAG, "setInnerHTML is now releasing semaphore.");
mutex.release();
Log.d(TAG, "setInnerHTML has successfully released the semaphore.");
}
public synchronized String getInnerHTML() {
Log.d(TAG, "getInnerHTML attempting to aquire semaphore, may block...");
String innerHTML = "";
try {
mutex.acquire();
Log.d(TAG, "getInnerHTML has aquired the semaphore, grabbing data.");
innerHTML = this.innerHTML;
Log.d(TAG, "getInnerHTML no longer needs semaphore, releasing");
mutex.release();
} catch (InterruptedException e) {
Log.d(TAG, "Something has gone wrong while attempting to aquire semaphore, aborting");
}
return innerHTML;
}
}
Now the way I use this in my code is as follows:
// I have access to the jsInterface object which is an instance of the class above as well as a webView which I will be executing the javascript on.
String getInnerHtmlJS = "javascript:window.MYJSINTERFACE.setInnerHTML(document.body.innerHTML);"
jsInterface.aquireSemaphore()
// Execute my JS on the webview
jsInterface.loadUrl(getInnerHtmlJS)
// Now we get our inner HTML
// Note: getInnerHTML will block since it must wait for the setInnerHTML (executed via the JS) function to release the semaphore
String theInnerHTML = jsInterface.getInnerHTML();