Determine If Android App Is Being Used For the First Time

Determine if Android app is being used for the first time

Another idea is to use a setting in the Shared Preferences. Same general idea as checking for an empty file, but then you don't have an empty file floating around, not being used to store anything

Check if application is on its first run

The following is an example of using SharedPreferences to achieve a 'first run' check.

public class MyActivity extends Activity {

    SharedPreferences prefs = null;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // Perhaps set content view here

        prefs = getSharedPreferences("com.mycompany.myAppName", MODE_PRIVATE);
    }

    @Override
    protected void onResume() {
        super.onResume();

        if (prefs.getBoolean("firstrun", true)) {
            // Do first run stuff here then set 'firstrun' as false
            // using the following line to edit/commit prefs
            prefs.edit().putBoolean("firstrun", false).commit();
        }
    }
}

When the code runs prefs.getBoolean(...) if there isn't a boolean saved in SharedPreferences with the key "firstrun" then that indicates the app has never been run (because nothing has ever saved a boolean with that key or the user has cleared the app data in order to force a 'first run' scenario). If this isn't the first run then the line prefs.edit().putBoolean("firstrun", false).commit(); will have been executed and therefore prefs.getBoolean("firstrun", true) will actually return false as it overrides the default true provided as the second parameter.

Android-How can I know if it is the first time the application launched?

Use sharedPreferences for the persistent data storage.when the application first launched just save a boolean value in the shared Preferences.Then check each time.

SharedPreferences sharedPref = getSharedPreferences("FileName",MODE_PRIVATE);
SharedPreferences.Editor prefEditor = sharedPref.edit();
prefEditor.putString("isLauncedTime",true);
prefEditor.commit();

Check if app is opened for the first time in LIBGDX

From the wiki:

Your changes to a preferences instance will only get persisted if you explicitly call the flush() method.

Add the line in your code:

prefs.putBoolean("lock", false);
prefs.flush();

How to detect app launched first time in a day

Note that in:

var firstTime = new Date().getTime();
if(window.localStorage.getItem('firstTime') == null){
    window.localStorage.setItem('firstTime', firstTime);

you are storing a number that represents the current moment to the millisecond. If you want the start of the day, set the hours to zero first:

var firstTime = new Date().setHours(0,0,0,0);

Now do the logic, storing the time value is fine:

if (window.localStorage.getItem('firstTime') == null){
    window.localStorage.setItem('firstTime', firstTime);

In the else part, you need to compare to another time value for the start of the day, just like above:

} else {

  var storedTime = window.localStorage.getItem('firstTime');

  // Get a new date, zero it as above and see if its the same time
  // If not, it must be a different day
  var secondTime = new Date().setHours(0,0,0,0)

  if (secondTime != +firstTime) {
    alert("Second time is a different day");

  } else {
    alert("First time is the same day");
  }
}

How to detect when an Android app goes to the background and come back to the foreground

The onPause() and onResume() methods are called when the application is brought to the background and into the foreground again. However, they are also called when the application is started for the first time and before it is killed. You can read more in Activity.

There isn't any direct approach to get the application status while in the background or foreground, but even I have faced this issue and found the solution with onWindowFocusChanged and onStop.

For more details check here Android: Solution to detect when an Android app goes to the background and come back to the foreground without getRunningTasks or getRunningAppProcesses.

(Android) Get user to input information only once

if you are looking at storing large or complicated data you can save it with room database. if you need to store simple data you can use shared preferences.

you can save a variable in shared preferences such as isFirstTimeUser=true or false then you can check this variable when the app starts. If it is the users first time to use the app present them with ui to create the fields you require. If not then proceed to fetch the details

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