fix navigation

app/src/main/java/com/vanced/manager/ui/events/Event.kt

@@ -0,0 +1,24 @@
+package com.vanced.manager.ui.events
+
+open class Event<out T>(private val content: T) {
+
+    var hasBeenHandled = false
+        private set // Allow external read but not write
+
+    /**
+     * Returns the content and prevents its use again.
+     */
+    fun getContentIfNotHandled(): T? {
+        return if (hasBeenHandled) {
+            null
+        } else {
+            hasBeenHandled = true
+            content
+        }
+    }
+
+    /**
+     * Returns the content, even if it's already been handled.
+     */
+    fun peekContent(): T = content
+}

app/src/main/java/com/vanced/manager/ui/fragments/HomeFragment.kt

@@ -8,7 +8,10 @@ import android.widget.Toast
 import androidx.databinding.DataBindingUtil
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.viewModels
+import androidx.lifecycle.Observer
 import androidx.localbroadcastmanager.content.LocalBroadcastManager
+import androidx.navigation.findNavController
+import androidx.navigation.fragment.NavHostFragment
 import com.google.android.material.tabs.TabLayout
 import com.google.android.material.tabs.TabLayoutMediator
 import com.vanced.manager.R
@@ -16,6 +19,7 @@ import com.vanced.manager.adapter.SectionPageAdapter
 import com.vanced.manager.adapter.SectionPageRootAdapter
 import com.vanced.manager.databinding.FragmentHomeBinding
 import com.vanced.manager.ui.dialogs.DialogContainer.installAlertBuilder
+import com.vanced.manager.ui.events.Event
 import com.vanced.manager.ui.viewmodels.HomeViewModel
 import com.vanced.manager.utils.AppUtils.installing
 
@@ -42,6 +46,13 @@ open class HomeFragment : Fragment(), View.OnClickListener {
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
+
+        viewModel.navigateDestination.observe(this, Observer<Event<Int>> {
+            val content = it.getContentIfNotHandled()
+            if(content != null){
+                view.findNavController().navigate(content)
+            }
+        })
         
         with(binding) {
             includeChangelogsLayout.changelogButton.setOnClickListener(this@HomeFragment)

app/src/main/java/com/vanced/manager/ui/viewmodels/HomeViewModel.kt

@@ -10,7 +10,8 @@ import androidx.core.content.ContextCompat.startActivity
 import androidx.databinding.ObservableBoolean
 import androidx.databinding.ObservableField
 import androidx.lifecycle.AndroidViewModel
-import androidx.navigation.fragment.NavHostFragment.findNavController
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.MutableLiveData
 import com.crowdin.platform.Crowdin
 import com.vanced.manager.R
 import com.vanced.manager.core.downloader.MicrogDownloader.downloadMicrog
@@ -18,7 +19,7 @@ import com.vanced.manager.core.downloader.MusicDownloader.downloadMusic
 import com.vanced.manager.core.downloader.VancedDownloader.downloadVanced
 import com.vanced.manager.model.DataModel
 import com.vanced.manager.model.ProgressModel
-import com.vanced.manager.ui.fragments.MainFragment
+import com.vanced.manager.ui.events.Event
 import com.vanced.manager.utils.AppUtils.installing
 import com.vanced.manager.utils.InternetTools
 import com.vanced.manager.utils.PackageHelper.uninstallApk
@@ -39,6 +40,11 @@ open class HomeViewModel(application: Application): AndroidViewModel(application
     val manager = ObservableField<DataModel>()
     val fetching = ObservableBoolean()
 
+    var _navigateDestination = MutableLiveData<Event<Int>>()
+
+    val navigateDestination : LiveData<Event<Int>>
+        get() = _navigateDestination
+
     fun fetchData() {
         CoroutineScope(Dispatchers.IO).launch {
             fetching.set(true)
@@ -88,7 +94,7 @@ open class HomeViewModel(application: Application): AndroidViewModel(application
             
         InternetTools.openUrl(url, color, getApplication())
     }
-    
+
     fun installVanced() {
         if (!installing) {
             if (!fetching.get()) {
@@ -98,7 +104,7 @@ open class HomeViewModel(application: Application): AndroidViewModel(application
                     if (app.getSharedPreferences("installPrefs", Context.MODE_PRIVATE).getBoolean("valuesModified", false)) {
                         downloadVanced(app)
                     } else {
-                        findNavController(MainFragment()).navigate(R.id.toInstallThemeFragment)
+                        _navigateDestination.value = Event(R.id.toInstallThemeFragment)
                     }
                 }
             }