fix null currentActivity

app/src/main/java/com/geeksville/mesh/AppIntroduction.kt

@@ -1,10 +1,9 @@
 package com.geeksville.mesh
 
-import android.content.Context
-import android.content.Intent
-import android.content.SharedPreferences
 import android.os.Bundle
+import androidx.core.content.edit
 import androidx.fragment.app.Fragment
+import com.geeksville.mesh.model.UIViewModel
 import com.github.appintro.AppIntro
 import com.github.appintro.AppIntroFragment
 
@@ -42,27 +41,21 @@ class AppIntroduction : AppIntro() {
         //addSlide(SlideTwoFragment())
     }
 
+    private fun done() {
+        val prefs = UIViewModel.getPreferences(this)
+        prefs.edit { putBoolean("app_intro_completed", true) }
+        finish()
+    }
+
     override fun onSkipPressed(currentFragment: Fragment?) {
         super.onSkipPressed(currentFragment)
         // Decide what to do when the user clicks on "Skip"
-        finish()
-        val preferences = getSharedPreferences("PREFERENCES", Context.MODE_PRIVATE)
-        var editor = preferences.edit()
-        editor.putBoolean("app_intro_completed", true)
-        editor.apply()
-
-        startActivity(Intent(this, MainActivity::class.java))
+        done()
     }
 
     override fun onDonePressed(currentFragment: Fragment?) {
         super.onDonePressed(currentFragment)
         // Decide what to do when the user clicks on "Done"
-        finish()
-        val preferences = getSharedPreferences("PREFERENCES", Context.MODE_PRIVATE)
-        var editor = preferences.edit()
-        editor.putBoolean("app_intro_completed", true)
-        editor.apply()
-
-        startActivity(Intent(this, MainActivity::class.java))
+        done()
     }
 }

app/src/main/java/com/geeksville/mesh/MainActivity.kt

@@ -263,20 +263,16 @@ class MainActivity : BaseActivity(), Logging {
     }
 
     override fun onCreate(savedInstanceState: Bundle?) {
-        val preferences = getSharedPreferences("PREFERENCES", Context.MODE_PRIVATE)
-
         installSplashScreen()
         super.onCreate(savedInstanceState)
 
-        if (!preferences.getBoolean("app_intro_completed", false)) {
+        val prefs = UIViewModel.getPreferences(this)
+        if (!prefs.getBoolean("app_intro_completed", false)) {
             startActivity(Intent(this, AppIntroduction::class.java))
         }
 
         binding = ActivityMainBinding.inflate(layoutInflater)
 
-        val prefs = UIViewModel.getPreferences(this)
-        model.setOwner(prefs.getString("owner", ""))
-
         /// Set theme
         setUITheme(prefs)
         setContentView(binding.root)

app/src/main/java/com/geeksville/mesh/android/GeeksvilleApplication.kt

@@ -32,10 +32,9 @@ open class GeeksvilleApplication(
     companion object {
         lateinit var analytics: AnalyticsProvider
         var currentActivity: Activity? = null
+        private val backstack = mutableListOf<Activity>()
     }
 
-    var splunk: AnalyticsProvider? = null
-
     private val lifecycleCallbacks = object : ActivityLifecycleCallbacks {
         override fun onActivityPaused(activity: Activity) {
         }
@@ -44,7 +43,8 @@ open class GeeksvilleApplication(
         }
 
         override fun onActivityDestroyed(activity: Activity) {
-            currentActivity = null
+            if (backstack.contains(activity)) backstack.remove(activity)
+            currentActivity = backstack.lastOrNull()
         }
 
         override fun onActivitySaveInstanceState(activity: Activity, outState: Bundle) {
@@ -54,7 +54,8 @@ open class GeeksvilleApplication(
         }
 
         override fun onActivityCreated(activity: Activity, savedInstanceState: Bundle?) {
-            currentActivity = activity
+            backstack.add(activity)
+            currentActivity = backstack.lastOrNull()
         }
 
         override fun onActivityResumed(activity: Activity) {
@@ -72,16 +73,13 @@ open class GeeksvilleApplication(
         }
 
     private val analyticsPrefs: SharedPreferences by lazy {
-        getSharedPreferences(
-            "analytics-prefs",
-            Context.MODE_PRIVATE
-        )
+        getSharedPreferences("analytics-prefs", Context.MODE_PRIVATE)
     }
 
     var isAnalyticsAllowed: Boolean
         get() = analyticsPrefs.getBoolean("allowed", true)
         set(value) {
-            analyticsPrefs.edit(commit = true) {
+            analyticsPrefs.edit {
                 putBoolean("allowed", value)
             }
 
@@ -112,13 +110,3 @@ open class GeeksvilleApplication(
     }
 
 }
-
-
-fun geeksvilleApp(context: Context) = context.applicationContext as GeeksvilleApplication
-
-
-interface GeeksvilleApplicationClient {
-
-    fun getAnalytics() = GeeksvilleApplication.analytics
-
-}