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How can I retrieve Notifications list of status bar programmatically?

How can I retrieve Notification list of status bar programmatically on android?
I found some ways like NotificationListenerService, but I would be happy to know any methods or apis that I can retrieve every StatusBarNotification s in one method call.
public List<StatusBarNotification> getNotifications()
{
//...
}
EDIT
Thanks to comment I found some way. I'll post it later when I am finished, for further users.

Mandatory Settings Update

I am making one android app where one setting is must every user need to update that which is pincode.
So after successful login, if the user has not updated pincode yet, it needs to be updated mandatory before navigating to any other screen.
What is the best way to implement this? Any Ideas?
Update:
After answer, I meant to say that setting I will be fetching from firebase database as boolean flag. So my actual query is how to show that as a mandatory to get the user update? (i.e) either navigating to different activity or showing popup and getting the setting etc. I need UI design ideas.
What is the best practice?

It is not clear what is the point of this, and if you have a server side that controls that stuff, but I'll try to give a help.
If you have a Server controlling authentication:
On login, call the API of your service to check if has happened or not. You could save the answer in a "shared preference" (Android Documentation), so you don't call your API every time.
If you only want to have the application on a client side:
Use 1 to store values that indicate if the desired action was performed or not, which is verified right after the login.
EDIT:
If the action is mandatory, you could send the user to an activity to update the pin, this will happen until the action is performed.

Client side approach:
You can use SharedPreferences to persist a value, like a simple boolean, that will inform you if that the user already updated the pincode or not.
I would recommend you to perform the check in the onResume() of your Launcher Activity.
Putting it simple and explicit:
public static final String PREF_FILE_NAME = "PrefFileName";
public static final String PREF_IS_PIN_CODE_UPDATED = "PREF_IS_PIN_CODE_UPDATED";
#Override
protected void onResume() {
super.onResume();
SharedPreferences prefs = getSharedPreferences(PREF_FILE_NAME, MODE_PRIVATE);
Boolean isPinCodeUpdated = prefs.getBoolean(PREF_IS_PIN_CODE_UPDATED, false);
if (isPinCodeUpdated) {
// You can proceed
} else {
// Force the user to update the pin code, by prompting for instance a dialog where he can change the pin with setCancelable(false)
}
}
After you know that your user already updated the pin code you just need to set the preference to true.
SharedPreferences.Editor editor = getSharedPreferences(PREF_FILE_NAME, MODE_PRIVATE).edit();
editor.putBoolean(PREF_IS_PIN_CODE_UPDATED, true);
editor.apply();
After this every time the user opens the app it will pass in the onResume() method and your isPinCodeUpdated var will be true and the app should proceed as usual.
From you question I am assuming that you didn't want a response in terms of UI but how could you have the information persisted.
Note: This implementation fails for multiple users in the same device. With few tweaks you can make it work for multiple users in the same device but in my opinion this verification should be done server side.

Android : Popup certain dialog at first startiup only

I am trying to develop an app that requires certain values to be set by the users at the app's first startup only, because i don't wanna bother them frequently inputting the values everytime they launch the app. My app has a single activity main and uses certain values that are inputted by the users at first startup. How can I make this possible.
Please explain me elaborately . :-)

You should use SharedPreferences to keep a track of the first use.
In the onCreate Method of your Activity (Startup activity), you could do something like this,
SharedPreferences userPrefs = getSharedPreferences("UserPrefs", 0);
Boolean firstUse = userPrefs.getBoolean("firstUse", true);
if(firstUse){
//this implies it is the first use of the app
//also once you are done implementing the logic for first use you need to put firstUse as true
SharedPreferences.Editor editor = userPrefs.edit();
editor.putBoolean("firstUse", false);
editor.commit();
}
else{
//take the user directly inside the app
}
Also, if you plan to save user information in the first use, look at different ways of storing data here.

show the alert initially and after getting the input values keep it in preference and next time check whether the required values existing or not. If it is already there avoid popup
For getting more information about shared preference check this link http://www.vogella.com/tutorials/AndroidFileBasedPersistence/article.html

preferences_statusFirst.getString("boot", "");
if (status.length() <= 0)
{
showDialog(DIALOG_birth);
editor_boot.putString("boot", "1");
editor_boot.commit();
}
else
{
}
}

Notifications in Android: change specific properties/fields?

On an Android 2.3.3 I want to update my Notification.
Today, I create a new Notification object, and fill it with stuff. That makes the ticker text show again, which I don't want. I just want to update the number in the Notification (and sometimes the contentText) without making a new Notification, and without replacing the current "contentText".
So:
How do I just update the number, without replacing any text (whatever text is in the notification now should be left untouched)
How do I get info on what text/data is in the current Notification?

Use custom notification and then update like this:
progressNotification.contentView.setProgressBar(R.id.PGB_UPLOAD, 100, percentage, false);
progressNotification.contentView.setTextViewText(R.id.TXV_UPLOAD_PROGRESS, String.valueOf(percentage)+"%");
objNotificationManager.notify(1, progressNotification);

You need to post the notification again, just as you said. To suppress the ticker, set the tickerText field to null.

Can I have an android activity run only on the first time an application is opened?

OK, so I'm playing around with an android app.
The 90% use case is that users want to go straight to the primary list screen to find what they're looking for. That's what I want as my default screen.
The first time a user loads the app however, some configuration is required before their list screen is of any value to them.
So my question, is how I can go about displaying the configuration activity the first time the app is opened up, and then the list screen for future openings.
I also want to put a demo button on the configuration screen, so I suppose more than just detecting that it's the first time, I specifically want to detect whether the user has performed certain configurations within the first screen.

After the first time the user has loaded the app you could store the details of whether user has performed the configurations in SharedPreferences.
protected void storeSharedPrefs(String value) {
/*
* Storing in Shared Preferences
*/
editor.putString("first", value);
editor.commit(); //Commiting changes
}
Check each on time application is loaded, whether its the first time and configuration details has been entered correctly by checking SharedPreferences
private boolean first_time_check() {
/*
* Checking Shared Preferences if the user had pressed
* the remember me button last time he logged in
* */
String first = uPreferences.getString("first", null);
if((first == null)){
return false;
}
else
return true;
}

i like dweebsonduty's method. a similar way to do this is to save their configuration information in files on the SD card. your app could start out by checking for those files and loading the information. if the load is successful, it moves on to the next activity, if not it starts the appropriate activity to prompt the user for input.
I have done this same thing, but instead of swiching activities i just switch views until i have all the info i need, and then move on.

Many applications actually store the current version in SharedPreferences, and check against it for if an update has been installed. Its a clever way of achieving a "what's changed" popup, or making sure that some settings get set (I would be wary of just having a boolean flag because if you ever want to add an additional setting, you will need a second flag and it gets messy after the third, etc.).

String VersionValue = "v.1.0";
final String PREFS_NAME = "MyPrefsFile";
SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
if (settings.getBoolean(VersionValue, true)) {
//the app is being launched for first time, do something
NewDialogFragment newFragment = new NewDialogFragment();
newFragment.show(getFragmentManager(), "New");
// record the fact that the app has been started at least once
settings.edit().putBoolean(VersionValue, false).commit();
}
You could do it this way and still get the same result I tried it its a small workaround if u do not fully understand how to check if the app is updated. Instead with this code you can just simply change the String VersoinValue to your current app version and android will think the app is a new first time app and will only display the code u wrote once until you change VersionValue on your next update. (:

How will you be storing the configuration?
If it is in SQLlite you could just create a table called firstuse and put a field in there called hasbeenused and make it null. Then when the app is used you can put a 1 in there. Then you can read it each time your app loads and if that field = 1 then go to your next activity.