Refactor navigation with parcelable data

Author: emirhanemmez

common/presentation/build.gradle.kts

@@ -52,6 +52,8 @@ dependencies {
     implementation(commonPresentationLibs.ui.graphics)
     implementation(commonPresentationLibs.ui.tooling.preview)
     implementation(commonPresentationLibs.material3)
+    implementation(commonPresentationLibs.navigation.common.ktx)
+    implementation(commonPresentationLibs.gson)
     debugImplementation(commonPresentationLibs.ui.tooling)
     debugImplementation(commonPresentationLibs.ui.test.manifest)
     androidTestImplementation(commonPresentationLibs.ui.test.junit4)

common/presentation/src/main/java/com/emirhanemmez/common/presentation/util/GsonHelper.kt

@@ -0,0 +1,17 @@
+package com.emirhanemmez.common.presentation.util
+
+import com.google.gson.Gson
+
+object GsonHelper {
+    private var gson: Gson? = null
+
+    fun gson(): Gson {
+        if (gson == null)
+            gson = Gson()
+        return gson!!
+    }
+
+    fun clear() {
+        gson = null
+    }
+}

common/presentation/src/main/java/com/emirhanemmez/common/presentation/util/ParcelableType.kt

@@ -0,0 +1,22 @@
+package com.emirhanemmez.common.presentation.util
+
+import android.os.Bundle
+import android.os.Parcelable
+import androidx.navigation.NavType
+import com.emirhanemmez.common.presentation.util.extension.getSafeParcelable
+
+class ParcelableType<T : Parcelable>(
+    private val clazz: Class<T>
+) : NavType<T>(isNullableAllowed = true) {
+
+    override fun get(bundle: Bundle, key: String): T? =
+        bundle.getSafeParcelable(key, clazz)
+
+    override fun parseValue(value: String): T =
+        GsonHelper.gson().fromJson(value, clazz)
+
+    override fun put(bundle: Bundle, key: String, value: T) {
+        GsonHelper.clear()
+        bundle.putParcelable(key, value)
+    }
+}

common/presentation/src/main/java/com/emirhanemmez/common/presentation/util/extension/NavExtensions.kt

@@ -1,8 +1,10 @@
 package com.emirhanemmez.common.presentation.util.extension
 
+import android.net.Uri
 import android.os.Build
 import android.os.Bundle
 import android.os.Parcelable
+import com.emirhanemmez.common.presentation.util.GsonHelper
 
 @Suppress("DEPRECATION")
 fun <T : Parcelable> Bundle.getSafeParcelable(key: String, clazz: Class<T>): T? {
@@ -12,3 +14,9 @@ fun <T : Parcelable> Bundle.getSafeParcelable(key: String, clazz: Class<T>): T?
         getParcelable(key)
     }
 }
+
+fun Parcelable.parcelableString(): String {
+    val str = Uri.encode(GsonHelper.gson().toJson(this))
+    GsonHelper.clear()
+    return str
+}

feature/detail/presentation/src/main/java/com/emirhanemmez/feature/detail/presentation/DetailNavigation.kt

@@ -1,23 +1,24 @@
 package com.emirhanemmez.feature.detail.presentation
 
 import androidx.navigation.NavGraphBuilder
-import androidx.navigation.NavType
 import androidx.navigation.compose.composable
 import androidx.navigation.navArgument
+import com.emirhanemmez.common.presentation.util.ParcelableType
 import com.emirhanemmez.common.presentation.util.extension.getSafeParcelable
 import com.emirhanemmez.feature.detail.presentation.data.DetailItem
 
 object DetailNavigation {
-    const val route = "detail/{detailEntityArg}"
-    const val detailEntityArg = "detailEntityArg"
+    internal const val detailEntityArg = "detailEntityArg"
+    const val route = "detail"
+    internal const val routeWithArgs = "$route/{$detailEntityArg}"
 }
 
 fun NavGraphBuilder.detailRoute() =
     composable(
-        route = DetailNavigation.route,
+        route = DetailNavigation.routeWithArgs,
         arguments = listOf(
             navArgument(DetailNavigation.detailEntityArg) {
-                type = NavType.ParcelableType(DetailItem::class.java)
+                type = ParcelableType(DetailItem::class.java)
             }
         )
     ) {

feature/favourite/presentation/src/main/java/com/emirhanemmez/feature/favourite/presentation/FavouriteNavigation.kt

@@ -9,12 +9,12 @@ object FavouriteNavigation {
     const val route = "favourite"
 }
 
-fun NavGraphBuilder.favouriteRoute(onDetailNavigation: (FavouriteItem) -> Unit) =
+fun NavGraphBuilder.favouriteRoute(navigateToDetail: (FavouriteItem) -> Unit) =
     composable(FavouriteNavigation.route) {
         val favouriteViewModel = hiltViewModel<FavouriteViewModel>()
         FavouriteRoute(
             onItemClick = { favouriteItem ->
-                onDetailNavigation.invoke(favouriteItem)
+                navigateToDetail.invoke(favouriteItem)
             },
             viewModel = favouriteViewModel
         )

feature/home/presentation/src/main/java/com/emirhanemmez/feature/home/presentation/HomeNavigation.kt

@@ -8,11 +8,11 @@ object HomeNavigation {
     const val route = "home"
 }
 
-fun NavGraphBuilder.homeRoute(onDetailNavigation: (HomeListItem) -> Unit) {
+fun NavGraphBuilder.homeRoute(navigateToDetail: (HomeListItem) -> Unit) {
     composable(HomeNavigation.route) {
         HomeRoute(
             onItemClick = {
-                onDetailNavigation.invoke(it)
+                navigateToDetail.invoke(it)
             }
         )
     }

gradle/dependencies/common/presentation.toml

@@ -3,8 +3,8 @@ core-ktx = { group = "androidx.core", name = "core-ktx", version.ref = "core-ktx
 lifecycle-runtime-ktx = { group = "androidx.lifecycle", name = "lifecycle-runtime-ktx", version.ref = "lifecycle" }
 compose-bom = { group = "androidx.compose", name = "compose-bom", version.ref = "compose-bom" }
 material3 = { group = "androidx.compose.material3", name = "material3", version.ref = "material3" }
-hilt = { group = "com.google.dagger", name = "hilt-android", version.ref = "hilt" }
-hilt-compiler = { group = "com.google.dagger", name = "hilt-compiler", version.ref = "hilt" }
+gson = { group = "com.google.code.gson", name = "gson", version.ref = "gson" }
+navigation-common-ktx = { group = "androidx.navigation", name = "navigation-common-ktx", version.ref = "navigation" }
 ui = { group = "androidx.compose.ui", name = "ui", version.ref = "compose" }
 ui-graphics = { group = "androidx.compose.ui", name = "ui-graphics", version.ref = "compose" }
 ui-tooling = { group = "androidx.compose.ui", name = "ui-tooling", version.ref = "compose" }
@@ -17,9 +17,10 @@ espresso-core = { group = "androidx.test.espresso", name = "espresso-core", vers
 [versions]
 core-ktx = "1.10.1"
 lifecycle = "2.6.1"
-compose = "1.4.3"
-hilt = "2.47"
+compose = "1.5.0"
 compose-bom = "2023.06.01"
+gson = "2.10.1"
+navigation = "2.7.0"
 material3 = "1.1.1"
 androidx-test-ext-junit = "1.1.5"
 espresso-core = "3.5.1"

navigation/build.gradle.kts

@@ -2,8 +2,6 @@
 plugins {
     alias(appLibs.plugins.androidLibrary)
     alias(appLibs.plugins.kotlin.android)
-    alias(appLibs.plugins.kotlin.kapt)
-    alias(appLibs.plugins.hilt)
 }
 
 android {
@@ -47,17 +45,14 @@ android {
 }
 
 dependencies {
+    implementation(project(":common:presentation"))
     implementation(project(":feature:home:domain"))
     implementation(project(":feature:favourite:domain"))
     implementation(project(":feature:detail:domain"))
     implementation(project(":feature:home:presentation"))
     implementation(project(":feature:favourite:presentation"))
     implementation(project(":feature:detail:presentation"))
     implementation(navigationLibs.core.ktx)
-    implementation(navigationLibs.hilt)
-    kapt(navigationLibs.hilt.compiler)
-    implementation(navigationLibs.hilt.navigation)
-    implementation(navigationLibs.gson)
     implementation(navigationLibs.navigation.compose)
     implementation(navigationLibs.compose.bom)
     implementation(navigationLibs.material3)

navigation/src/main/java/com/emirhanemmez/navigation/Navigation.kt

@@ -1,9 +1,9 @@
 package com.emirhanemmez.navigation
 
 import androidx.compose.runtime.Composable
-import androidx.hilt.navigation.compose.hiltViewModel
 import androidx.navigation.NavHostController
 import androidx.navigation.compose.NavHost
+import com.emirhanemmez.common.presentation.util.extension.parcelableString
 import com.emirhanemmez.feature.detail.presentation.DetailNavigation
 import com.emirhanemmez.feature.detail.presentation.detailRoute
 import com.emirhanemmez.feature.favourite.presentation.favouriteRoute
@@ -13,27 +13,24 @@ import com.emirhanemmez.navigation.mapper.toDetailItem
 
 @Composable
 fun Navigation(
-    navController: NavHostController,
-    viewModel: NavigationViewModel = hiltViewModel()
+    navController: NavHostController
 ) {
     NavHost(
         navController = navController,
         startDestination = HomeNavigation.route
     ) {
         homeRoute(
-            onDetailNavigation = { homeListItem ->
-                val detailEntityArg = viewModel.getParcelableString(homeListItem.toDetailItem())
+            navigateToDetail = { homeListItem ->
+                val detailEntityArg = homeListItem.toDetailItem().parcelableString()
                 navController.navigate("${DetailNavigation.route}/$detailEntityArg")
             }
         )
         favouriteRoute(
-            onDetailNavigation = { favouriteItem ->
-                val detailEntityArg = viewModel.getParcelableString(favouriteItem.toDetailItem())
+            navigateToDetail = { favouriteItem ->
+                val detailEntityArg = favouriteItem.toDetailItem().parcelableString()
                 navController.navigate("${DetailNavigation.route}/$detailEntityArg")
             }
         )
-        detailRoute(
-
-        )
+        detailRoute()
     }
 }