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Google Play Install Referrer Library - Referrer Generation

I'm developing an android application in Java where I need to pass the referer information to an URL. I'm getting the referrer information using Play Install Referrer Library.
Here is my code:
InstallReferrerClient referrerClient = InstallReferrerClient.newBuilder(this).build();
referrerClient.startConnection(new InstallReferrerStateListener() {
#Override
public void onInstallReferrerSetupFinished(int responseCode) {
switch (responseCode) {
case InstallReferrerClient.InstallReferrerResponse.OK:
try {
Log.v("TAG", "InstallReferrer conneceted");
ReferrerDetails response = referrerClient.getInstallReferrer();
System.out.println("referrerUrl ID: " + response);
referrerClient.endConnection();
} catch (RemoteException e) {
e.printStackTrace();
}
break;
case InstallReferrerClient.InstallReferrerResponse.FEATURE_NOT_SUPPORTED:
Log.w("TAG", "InstallReferrer not supported");
break;
case InstallReferrerClient.InstallReferrerResponse.SERVICE_UNAVAILABLE:
Log.w("TAG", "Unable to connect to the service");
break;
default:
Log.w("TAG", "responseCode not found.");
}
}
#Override
public void onInstallReferrerServiceDisconnected() {
// Try to restart the connection on the next request to
// Google Play by calling the startConnection() method.
}
});
Code is working fine and currently, the above snippet is inside my activity's onCreate method. which means it will start the new connection every time the user opens the activity.
In the library documentation, they have written that
Caution: The install referrer information will be available for 90
days and won't change unless the application is reinstalled. To avoid
unnecessary API calls in your app, you should invoke the API only once
during the first execution after install.
This is where I'm stuck, should I just call this thing when the application starts the first time?
If yes, I can store this referrer in the shared preference, but then how will I able to know that 90 days have been passed and I need to trigger that action again? Or it there something else that should I need to implement? Kindly help me with this issue.

Web Browser in Java FX

I am just a beginner and i wanted to create a web browser in java using swing. now here are the three things that i m not able to do:
Dont know how to load a web page in a frame. here is my code for that:
AddressField.getText();
try {
URI uri=new URI(AddressField.getText());
URL url=uri.toURL();
InputStream in=url.openStream();
} catch (URISyntaxException ex) {
Logger.getLogger(MyBrowser.class.getName()).log(Level.SEVERE, null, ex);
} catch (MalformedURLException ex) {
Logger.getLogger(MyBrowser.class.getName()).log(Level.SEVERE, null, ex);
} catch (IOException ex) {
Logger.getLogger(MyBrowser.class.getName()).log(Level.SEVERE, null, ex);
}
I want to put a backward button to get back to previous page. I tried to do that but i doesnt worked well. i need a good code to get back button in function. here is the code for its action listener:
ActionListener ab = new ActionListener() {
#Override public void actionPerformed(ActionEvent e) {
int i= store.size();
loadURL(store.get(i-2).toString());//store is object of ArrayList
}
};
I also want to put an option to open a new tab and also show record of history of pages visited.
hoping for positive responses. every help will be appreciated. thank you

a) From this example it looks like you can just get the webEngine from the WebView instance and load the URL.
final WebView browser = new WebView();
final WebEngine webEngine = browser.getEngine();
// that should do it...
webEngine.load(url.toExternalForm());
b) There seems to be history support built-in.
You'll just need to navigate between items...
c) As stated previously, Web History support seems to be built-in. For tabs, you'll likely need to have a TabPane (each tab with its one WebView component).

Java Eclipse "process" not ending after closing application

I am writing an application that displays webcam connected to my computer.
I will just write code here since the code is very simple.
public static void main(String[] args) {
JFrameImageDisplayer _window = new JFrameImageDisplayer();
//webcamGrabber _wg = new webcamGrabber();
//commented out because I am having trouble with this class.
}
JFrameImageDisplayer opens a frame, pretty much that's all it does.
When I run this code, I open a simple application with a JLabel in the frame. If I close the application, then the whole process terminates( and the process at the Windows Task Manager Process tab processes as well).
However once I create _wg, the process at the Task Manager does not terminate even after I close the application ending up just burning processing power until I manually go to process bar to end it.
Below is the construction code for the webcamGrabber.
{
OpenCVFrameGrabber _grab = new OpenCVFrameGrabber(0);
try{
_grab.start();
} catch (Exception e){
e.printStackTrace();
}
}

Well I was not so sure what do. So I manually released the resources.
protected void processWindowEvent(WindowEvent e){
if(e.getID() == WindowEvent.WINDOW_CLOSING) {
try{_wg._grab.release();}
catch(Exception ee){}
}
super.processWindowEvent(e);
}
Not the prettiest way to do it, but it works.

How to enable the default highlight menus in android webview?

How to enable the default text highlights menu like: Copy/Paste/Search/Share in android webview ?

Working on Android 1.5 - 2.3 you can use emulateShiftHeld() made public since 2.2 but now is deprecated. this method put your WebView into text selection mode.
https://developer.android.com/reference/android/webkit/WebView.html#emulateShiftHeld%28%29
Unfortunately there's no copy/paste/search/share function integrated in Android, since Android 2.0 the text selection
can be driven by touch but other than that, there's no other thing you can do.

I found a workaround for this
Check out method selectText() on WebView (it's not in API, but can be invoked using reflection)
here is my full method source code:
public void startTextSelection() {
try {
WebView.class.getMethod("selectText").invoke(this);
} catch (Exception e) {
try {
WebView.class.getMethod("emulateShiftHeld").invoke(this);
} catch (Exception e1) {
KeyEvent shiftPressEvent = new KeyEvent(0, 0,
KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_SHIFT_LEFT, 0, 0);
shiftPressEvent.dispatch(this);
Toast.makeText(getContext(), R.string.select_text, Toast.LENGTH_LONG).show();
}
}
}
Works on ICS too.

Try this:
mWebView.setHapticFeedbackEnabled(true);
mWebView.setLongClickable(true);

Using the content handler API (JSR 211) to open applications

I want to be able to launch native and J2ME applications through my application using the content handler API (JSR 211) on a Nokia 6212.
At the moment, I am unable to do so, as it always states that there is "No Content Handler Found" and throws a javax.microedition.content.ContentHandlerException.
At the moment, I am trying to get the phone to launch its browser and go to a certain website, just to test that I can use the framework. I have tried many different Invocation objects:
//throw exceptions
new Invocation("http://www.somesite.com/index.html",
"application/internet-shortcut");
new Invocation("http://www.google.co.uk","text/html");
// a long shot, I know
new Invocation("http://www.somesite.com/text.txt","text/plain");
// massive long shot
new Invocation("http://www.google.co.uk","application/browser");
//appears to download the link and content (and definitely does in the Nokia
// emulator) and then throws an exception
new Invocation("http://www.google.co.uk");
new Invocation("http://www.somesite.com/index.html");
Below is the code that I have been using, please bear in mind the parameters often changed to generate the different Invocation objects.
/*
* Invokes an application using the Content Handler API
*/
public void doInvoke(String url, String mime, String payload){
Registry register = Registry.getRegistry(this.getClass().getName());
Invocation invoke = new Invocation(url, mime, null, false,
ContentHandler.ACTION_OPEN);
boolean mustQuit = false;
try {
mustQuit = register.invoke(invoke);
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (ContentHandlerException e) {
e.printStackTrace();
} catch (SecurityException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
if(mustQuit){
this.quit();
}
}

Try this:
Registry register = Registry.getRegistry(this.getClass().getName());
You must call Registry.getRegistry for the MIDlet inheritor. Just use your MIDlet for getting the class name.