Add START_WITH_CROP_SCREEN, read from local_debug.properties, to BuildConfig in debug mode and set startDestination based on it

Author: w2sv

.gitignore

@@ -77,4 +77,5 @@ lint/reports/
 # Android Profiling
 *.hprof
 
-.kotlin/
+.kotlin/
+local_debug.properties

app/build.gradle.kts

@@ -1,3 +1,4 @@
+import com.android.build.api.dsl.VariantDimension
 import java.io.FileInputStream
 import java.util.Properties
 
@@ -20,15 +21,6 @@ android {
 
         versionCode = project.findProperty("versionCode")!!.toString().toInt()
         versionName = version.toString()
-
-        @Suppress("UnstableApiUsage")
-        externalNativeBuild {
-            cmake {
-                cppFlags("-frtti -fexceptions")
-                abiFilters("x86", "x86_64", "armeabi-v7a", "arm64-v8a")
-                arguments("-DOpenCV_DIR=${rootProject.projectDir}/opencv/native")
-            }
-        }
     }
     signingConfigs {
         create("release") {
@@ -47,9 +39,11 @@ android {
     }
     buildTypes {
         getByName("debug") {
+            buildStartWithCropScreenConfigField(retrieveStartWithCropScreenValue(default = false))
             applicationIdSuffix = ".debug"
         }
         getByName("release") {
+            buildStartWithCropScreenConfigField(false)
             isMinifyEnabled = true
             isShrinkResources = true
             proguardFiles(
@@ -86,6 +80,26 @@ android {
     }
 }
 
+private fun retrieveStartWithCropScreenValue(default: Boolean = false): Boolean {
+    val localDebugPropertiesFile = rootProject.file("local_debug.properties")
+
+    if (localDebugPropertiesFile.exists()) {
+        val props = Properties()
+        props.load(FileInputStream(localDebugPropertiesFile))
+        return (props.getProperty("startWithCropScreen")
+            ?: error("Couldn't find property 'startWithCropScreen'")).toBoolean()
+    }
+    return default
+}
+
+private fun VariantDimension.buildStartWithCropScreenConfigField(value: Boolean) {
+    buildConfigField(
+        "boolean",
+        "START_WITH_CROP_SCREEN",
+        value.toString()
+    )
+}
+
 // https://github.com/Triple-T/gradle-play-publisher
 play {
     serviceAccountCredentials.set(file("service-account-key.json"))

app/src/main/kotlin/com/w2sv/autocrop/MainActivity.kt

@@ -1,5 +1,6 @@
 package com.w2sv.autocrop
 
+import android.annotation.SuppressLint
 import android.os.Bundle
 import androidx.annotation.IdRes
 import androidx.appcompat.app.AppCompatActivity
@@ -10,6 +11,7 @@ import androidx.navigation.NavController
 import androidx.navigation.fragment.NavHostFragment
 import com.w2sv.kotlinutils.coroutines.flow.collectOn
 import dagger.hilt.android.AndroidEntryPoint
+import kotlinx.coroutines.CoroutineScope
 import slimber.log.i
 
 @AndroidEntryPoint
@@ -20,13 +22,30 @@ class MainActivity : AppCompatActivity(R.layout.activity_main) {
         super.onCreate(savedInstanceState)
 
         if (BuildConfig.DEBUG) {
-            val navController = findNavController(R.id.nav_host_fragment)
-            navController.currentBackStack.collectOn(lifecycleScope) { backStackEntries ->
-                i { "BackStack: ${backStackEntries.map { it.destination.displayName.substringAfterLast("/") }}" }
+            findNavController(R.id.nav_host_fragment).apply {
+                setStartDestinationBasedOnStartWithCropScreen()
+                setupBackStackLogging(lifecycleScope)
             }
         }
     }
 }
 
 private fun FragmentActivity.findNavController(@IdRes id: Int): NavController =
     (supportFragmentManager.findFragmentById(id) as NavHostFragment).navController
+
+@SuppressLint("RestrictedApi")
+private fun NavController.setupBackStackLogging(scope: CoroutineScope) {
+    currentBackStack.collectOn(scope) { backStackEntries ->
+        i { "BackStack: ${backStackEntries.map { it.destination.displayName.substringAfterLast("/") }}" }
+    }
+}
+
+private fun NavController.setStartDestinationBasedOnStartWithCropScreen() {
+    @Suppress("KotlinConstantConditions")
+    if (BuildConfig.START_WITH_CROP_SCREEN) {
+        val graph = navInflater.inflate(R.navigation.nav_graph).apply {
+            setStartDestination(R.id.crop_nav_graph)
+        }
+        this.graph = graph
+    }
+}

app/src/main/res/navigation/nav_graph.xml

@@ -66,6 +66,10 @@
             <argument
                 android:name="cropBundleIndex"
                 app:argType="integer" />
+
+            <argument
+                android:name="transitionName"
+                app:argType="string" />
         </fragment>
 
         <fragment