Get Application Installed Date on Android

Is there are way to find out the "Date when an application was installed" on an Android Device.

Have searched extensively, but unable to find relevant answer.

Was unable to find anything regarding Date when Application was Installed through PackageManager documentation/Code.

or this one (API Level 9 upwards!):

long installed = context
    .getPackageManager()
    .getPackageInfo(context.getPackag‌​eName(), 0)
    .firstInstallTime
;

Use this code:

PackageManager pm = context.getPackageManager();
ApplicationInfo appInfo = pm.getApplicationInfo("app.package.name", 0);
String appFile = appInfo.sourceDir;
long installed = new File(appFile).lastModified();

First Time It Was Installed

activity.getPackageManager().getPackageInfo( activity.getPackageName(), 0 ).firstInstallTime;

Last Time It Was Updated

activity.getPackageManager().getPackageInfo( activity.getPackageName(), 0 ).lastUpdateTime;

Try one of these

/**
 * The time at which the app was first installed. Units are as per currentTimeMillis().
 * @param context
 * @return
 */
public static long getAppFirstInstallTime(Context context){
    PackageInfo packageInfo;
    try {
	if(Build.VERSION.SDK_INT>8/*Build.VERSION_CODES.FROYO*/ ){
	    packageInfo = context.getPackageManager().getPackageInfo(context.getPackageName(), 0);
	    return packageInfo.firstInstallTime;
	}else{
	    //firstinstalltime unsupported return last update time not first install time
	    ApplicationInfo appInfo = context.getPackageManager().getApplicationInfo(context.getPackageName(), 0);
	    String sAppFile = appInfo.sourceDir;
	    return new File(sAppFile).lastModified();
	}
    } catch (NameNotFoundException e) {
	//should never happen
	return 0;
    }
}

This method returns the date of the install in String format like 12/25/2016 10:38:02:

  private String getInstallDate() {
        // get app installation date

        PackageManager packageManager =  getActivity().getPackageManager();
        long installTimeInMilliseconds; // install time is conveniently provided in milliseconds

        Date installDate = null;
        String installDateString = null;

        try {
            PackageInfo packageInfo = packageManager.getPackageInfo(getActivity().getPackageName(), 0);
            installTimeInMilliseconds = packageInfo.firstInstallTime;
            installDateString  = MiscUtilities.getDate(installTimeInMilliseconds, "MM/dd/yyyy hh:mm:ss");
        }
        catch (PackageManager.NameNotFoundException e) {
            // an error occurred, so display the Unix epoch
            installDate = new Date(0);
            installDateString = installDate.toString();
        }

        return installDateString;
    }

MiscUtilities

/**
 * Return date in specified format.
 *
 * @param milliSeconds Date in milliseconds
 * @param dateFormat   Date format
 * @return String representing date in specified format
 * <p>
 * Date myDate = MiscUtilities.getDate(82233213123L, "dd/MM/yyyy hh:mm:ss.SSS");
 */
public static String getDate(long milliSeconds, String dateFormat) {
    // Create a DateFormatter object for displaying date in specified format.
    SimpleDateFormat formatter = new SimpleDateFormat(dateFormat);

    // Create a calendar object that will convert the date and time value in milliseconds to date.
    Calendar calendar = Calendar.getInstance();
    calendar.setTimeInMillis(milliSeconds);
    return formatter.format(calendar.getTime());
}

public long getInstallDateInMilliseconds() {
    long installDate;
    try
    {
        installDate = context.getPackageManager()
                      .getPackageInfo(context.getPackageName(), 0)
                      .firstInstallTime;
    } catch (PackageManager.NameNotFoundException e) {
        installDate = Calendar.getInstance().getTimeInMillis();
    }
    return installDate;
}