Added 2 very useful methods

1. isFirstTimeInstall():
If you want to know whether this is the first time installation of this app in this device.
2. isAppUpgraded():
If you want to know whether the current version was installed over a previous version (update/upgrade) or if it is freshly installed (clean install).

Code:
/**
     * Return true if this is the first ever time that the application is installed on the device.
     *
     * @return true if this is the first ever time that the application is installed on the device.
     */
    public static boolean isFirstTimeInstall(){
        try {
            Long firstInstallTime = Utils.getApp().getPackageManager().getPackageInfo(this.getAppPackageName(), 0).firstInstallTime;
            Long lastUpdateTime = Utils.getApp().getPackageManager().getPackageInfo(this.getAppPackageName(), 0).lastUpdateTime;
            return firstInstallTime == lastUpdateTime;
        } catch (Exception e) {
            return false;
        }
    }

    /**
     * Return true if app was previously installed and this one is an update/upgrade to that one, returns false if this is a fresh installation and not an update/upgrade.
     *
     * @return true if app was previously installed and this one is an update/upgrade to that one, returns false if this is a fresh installation and not an update/upgrade.
     */
    public static boolean isAppUpgraded(){
        try {
            Long firstInstallTime = Utils.getApp().getPackageManager().getPackageInfo(this.getAppPackageName(), 0).firstInstallTime;
            Long lastUpdateTime = Utils.getApp().getPackageManager().getPackageInfo(this.getAppPackageName(), 0).lastUpdateTime;
            return firstInstallTime != lastUpdateTime;
        } catch (Exception e) {
            return false;
        }
    }

Author: XiXiongMaoXiong

lib/utilcode/src/main/java/com/blankj/utilcode/util/AppUtils.java

@@ -384,6 +384,38 @@ public static int getAppIconId(final String packageName) {
         }
     }
 
+    
+    /**
+     * Return true if this is the first ever time that the application is installed on the device.
+     *
+     * @return true if this is the first ever time that the application is installed on the device.
+     */
+    public static boolean isFirstTimeInstall(){
+        try {
+            Long firstInstallTime = Utils.getApp().getPackageManager().getPackageInfo(this.getAppPackageName(), 0).firstInstallTime;
+            Long lastUpdateTime = Utils.getApp().getPackageManager().getPackageInfo(this.getAppPackageName(), 0).lastUpdateTime;
+            return firstInstallTime == lastUpdateTime;
+        } catch (Exception e) {
+            return false;
+        }
+    }
+
+    /**
+     * Return true if app was previously installed and this one is an update/upgrade to that one, returns false if this is a fresh installation and not an update/upgrade.
+     *
+     * @return true if app was previously installed and this one is an update/upgrade to that one, returns false if this is a fresh installation and not an update/upgrade.
+     */
+    public static boolean isAppUpgraded(){
+        try {
+            Long firstInstallTime = Utils.getApp().getPackageManager().getPackageInfo(this.getAppPackageName(), 0).firstInstallTime;
+            Long lastUpdateTime = Utils.getApp().getPackageManager().getPackageInfo(this.getAppPackageName(), 0).lastUpdateTime;
+            return firstInstallTime != lastUpdateTime;
+        } catch (Exception e) {
+            return false;
+        }
+    }
+    
+   
     /**
      * Return the application's package name.
      *