Add Welcome message

app/src/main/java/net/pokeranalytics/android/ui/activity/HomeActivity.kt

@@ -3,12 +3,13 @@ package net.pokeranalytics.android.ui.activity
 import android.content.Context
 import android.content.Intent
 import android.os.Bundle
+import androidx.appcompat.app.AlertDialog
 import com.google.android.material.bottomnavigation.BottomNavigationView
 import kotlinx.android.synthetic.main.activity_home.*
 import net.pokeranalytics.android.R
 import net.pokeranalytics.android.ui.activity.components.PokerAnalyticsActivity
 import net.pokeranalytics.android.ui.adapter.HomePagerAdapter
-
+import net.pokeranalytics.android.util.Preferences
 
 
 class HomeActivity : PokerAnalyticsActivity() {
@@ -44,6 +45,7 @@ class HomeActivity : PokerAnalyticsActivity() {
 		setContentView(R.layout.activity_home)
 
 		initUI()
+		checkFirstLaunch()
 	}
 
 	/**
@@ -60,6 +62,20 @@ class HomeActivity : PokerAnalyticsActivity() {
 
 	}
 
+	/**
+	 * Check first launch
+	 */
+	private fun checkFirstLaunch() {
+		if (Preferences.getBoolean(Preferences.Keys.FIRST_LAUNCH, this, true)) {
+			Preferences.setBoolean(Preferences.Keys.FIRST_LAUNCH, false, this)
+			val builder = AlertDialog.Builder(this)
+				.setTitle(String.format(getString(R.string.welcome_in_), getString(R.string.app_name)))
+				.setMessage(R.string.popup_message_welcome)
+				.setNegativeButton(R.string.ok, null)
+			builder.show()
+		}
+	}
+
 	/**
 	 * Display a new fragment
 	 */

app/src/main/java/net/pokeranalytics/android/util/Preferences.kt

@@ -7,7 +7,8 @@ import java.util.*
 class Preferences {
 
     enum class Keys(var identifier: String) {
-        CURRENCY_CODE("CurrencyCode")
+        CURRENCY_CODE("CurrencyCode"),
+        FIRST_LAUNCH("firstLaunch")
     }
 
     companion object {
@@ -18,7 +19,7 @@ class Preferences {
 	        val preferences = PreferenceManager.getDefaultSharedPreferences(context)
 	        val editor = preferences.edit()
 	        editor.putString(key.identifier, value)
-            editor.commit()
+	        editor.apply()
         }
 
         fun getString(key: Keys, context: Context) : String? {
@@ -26,6 +27,18 @@ class Preferences {
             return preferences.getString(key.identifier, null)
         }
 
+	    fun setBoolean(key: Keys, value: Boolean, context: Context) {
+		    val preferences = PreferenceManager.getDefaultSharedPreferences(context)
+		    val editor = preferences.edit()
+		    editor.putBoolean(key.identifier, value)
+		    editor.apply()
+	    }
+
+	    fun getBoolean(key: Keys, context: Context, defaultValue: Boolean? = false) : Boolean {
+		    val preferences = PreferenceManager.getDefaultSharedPreferences(context)
+		    return preferences.getBoolean(key.identifier, defaultValue ?: false)
+	    }
+
         fun setCurrencyCode(currencyCode: String, context: Context) {
             Preferences.setString(Keys.CURRENCY_CODE, currencyCode, context)
             currencyLocale = null