Share search query in shared view model

app/src/main/java/de/christinecoenen/code/zapp/app/main/MainActivity.kt

@@ -14,6 +14,7 @@ import androidx.core.content.ContextCompat
 import androidx.core.view.MenuProvider
 import androidx.core.view.isVisible
 import androidx.core.view.updateLayoutParams
+import androidx.core.widget.addTextChangedListener
 import androidx.navigation.NavController
 import androidx.navigation.NavDestination
 import androidx.navigation.fragment.NavHostFragment
@@ -25,10 +26,13 @@ import com.google.android.material.appbar.AppBarLayout.LayoutParams.SCROLL_FLAG_
 import com.google.android.material.appbar.AppBarLayout.LayoutParams.SCROLL_FLAG_SCROLL
 import com.google.android.material.search.SearchView
 import de.christinecoenen.code.zapp.R
+import de.christinecoenen.code.zapp.app.search.SearchViewModel
 import de.christinecoenen.code.zapp.app.settings.repository.SettingsRepository
 import de.christinecoenen.code.zapp.databinding.ActivityMainBinding
 import de.christinecoenen.code.zapp.utils.system.SystemUiHelper
 import org.koin.android.ext.android.inject
+import org.koin.androidx.viewmodel.ext.android.viewModel
+
 
 class MainActivity : AppCompatActivity(), MenuProvider {
 
@@ -37,6 +41,8 @@ class MainActivity : AppCompatActivity(), MenuProvider {
 
 	private val settingsRepository: SettingsRepository by inject()
 
+	private val searchViewModel: SearchViewModel by viewModel()
+
 	private lateinit var navController: NavController
 	private lateinit var appBarConfiguration: AppBarConfiguration
 
@@ -86,6 +92,9 @@ class MainActivity : AppCompatActivity(), MenuProvider {
 		onBackPressedDispatcher.addCallback(this, onSearchViewPressedCallback)
 
 		binding.searchView.addTransitionListener(searchViewTransistionListener)
+		binding.searchView.editText.addTextChangedListener {
+			searchViewModel.setSearchQuery(it.toString())
+		}
 
 		addMenuProvider(this)
 

app/src/main/java/de/christinecoenen/code/zapp/app/search/SearchFragment.kt

@@ -5,15 +5,18 @@ import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import androidx.fragment.app.Fragment
+import androidx.lifecycle.lifecycleScope
 import de.christinecoenen.code.zapp.databinding.SearchFragmentBinding
-import org.koin.androidx.viewmodel.ext.android.viewModel
+import kotlinx.coroutines.flow.collectLatest
+import kotlinx.coroutines.launch
+import org.koin.androidx.viewmodel.ext.android.activityViewModel
 
 class SearchFragment : Fragment() {
 
 	private var _binding: SearchFragmentBinding? = null
 	private val binding: SearchFragmentBinding get() = _binding!!
 
-	private val viewModel: SearchViewModel by viewModel()
+	private val viewModel: SearchViewModel by activityViewModel()
 
 	override fun onCreateView(
 		inflater: LayoutInflater, container: ViewGroup?,
@@ -21,6 +24,12 @@ class SearchFragment : Fragment() {
 	): View {
 		_binding = SearchFragmentBinding.inflate(inflater, container, false)
 
+		viewLifecycleOwner.lifecycleScope.launch {
+			viewModel.searchQuery.collectLatest { query ->
+				binding.test.text = query
+			}
+		}
+
 		return binding.root
 	}
 

app/src/main/java/de/christinecoenen/code/zapp/app/search/SearchViewModel.kt

@@ -1,7 +1,15 @@
 package de.christinecoenen.code.zapp.app.search
 
 import androidx.lifecycle.ViewModel
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.asStateFlow
 
 class SearchViewModel : ViewModel() {
-    // TODO: Implement the ViewModel
-}
+
+	private val _searchQuery = MutableStateFlow("")
+	val searchQuery = _searchQuery.asStateFlow()
+
+	fun setSearchQuery(query: String?) {
+		_searchQuery.tryEmit(query ?: "")
+	}
+}

app/src/main/res/layout/search_fragment.xml

@@ -6,6 +6,7 @@
 	tools:context=".app.search.SearchFragment">
 
 	<com.google.android.material.textview.MaterialTextView
+		android:id="@+id/test"
 		style="@style/TextAppearance.AppCompat.Display4"
 		android:layout_width="match_parent"
 		android:layout_height="match_parent"