refactor: Android Demo app uses Jetpack Compose

Author: dcalhoun

android/app/build.gradle.kts

@@ -1,6 +1,7 @@
 plugins {
     alias(libs.plugins.android.application)
     alias(libs.plugins.jetbrains.kotlin.android)
+    alias(libs.plugins.jetbrains.kotlin.compose)
 }
 
 android {
@@ -33,6 +34,9 @@ android {
     kotlinOptions {
         jvmTarget = "1.8"
     }
+    buildFeatures {
+        compose = true
+    }
 }
 
 dependencies {
@@ -46,6 +50,14 @@ dependencies {
     implementation(libs.androidx.recyclerview)
     implementation(libs.wordpress.rs.android)
     implementation(project(":Gutenberg"))
+
+    // Compose
+    implementation(platform(libs.androidx.compose.bom))
+    implementation(libs.androidx.compose.ui)
+    implementation(libs.androidx.compose.material3)
+    implementation(libs.androidx.compose.ui.tooling.preview)
+    implementation(libs.androidx.activity.compose)
+
     testImplementation(libs.junit)
     androidTestImplementation(libs.androidx.junit)
     androidTestImplementation(libs.androidx.espresso.core)

android/app/src/main/java/com/example/gutenbergkit/EditorActivity.kt

@@ -3,26 +3,24 @@ package com.example.gutenbergkit
 import android.os.Bundle
 import android.webkit.WebView
 import android.content.pm.ApplicationInfo
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
 import androidx.activity.enableEdgeToEdge
-import androidx.appcompat.app.AppCompatActivity
-import androidx.core.view.ViewCompat
-import androidx.core.view.WindowInsetsCompat
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material3.Scaffold
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.viewinterop.AndroidView
 import org.wordpress.gutenberg.EditorConfiguration
 import org.wordpress.gutenberg.GutenbergView
 
-class EditorActivity : AppCompatActivity() {
+class EditorActivity : ComponentActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         enableEdgeToEdge()
-        setContentView(R.layout.activity_editor)
 
-        ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.editor)) { v, insets ->
-            val systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars())
-            v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom)
-            insets
-        }
-
-        if (0 != (applicationInfo.flags and android.content.pm.ApplicationInfo.FLAG_DEBUGGABLE)) {
+        if (0 != (applicationInfo.flags and ApplicationInfo.FLAG_DEBUGGABLE)) {
             WebView.setWebContentsDebuggingEnabled(true)
         }
 
@@ -38,7 +36,32 @@ class EditorActivity : AppCompatActivity() {
                 intent.getParcelableExtra<EditorConfiguration>(MainActivity.EXTRA_CONFIGURATION)
             } ?: EditorConfiguration.builder().build()
 
-        val gbView = findViewById<GutenbergView>(R.id.gutenbergView)
-        gbView.start(configuration)
+        setContent {
+            EditorScreen(
+                configuration = configuration,
+                onClose = { finish() }
+            )
+        }
+    }
+}
+
+@Composable
+fun EditorScreen(
+    configuration: EditorConfiguration,
+    onClose: () -> Unit
+) {
+    Scaffold(
+        modifier = Modifier.fillMaxSize()
+    ) { innerPadding ->
+        AndroidView(
+            factory = { context ->
+                GutenbergView(context).apply {
+                    start(configuration)
+                }
+            },
+            modifier = Modifier
+                .fillMaxSize()
+                .padding(innerPadding)
+        )
     }
 }

android/gradle/libs.versions.toml

@@ -16,6 +16,8 @@ robolectric = "4.14.1"
 kotlinx-coroutines = '1.10.2'
 androidx-recyclerview = '1.3.2'
 wordpress-rs = 'trunk-503f1da9e067677d1517d09f926b1d038dfa58a1'
+composeBom = "2024.12.01"
+activityCompose = "1.9.3"
 
 [libraries]
 androidx-core-ktx = { group = "androidx.core", name = "core-ktx", version.ref = "coreKtx" }
@@ -34,8 +36,14 @@ robolectric = { group = "org.robolectric", name = "robolectric", version.ref = "
 kotlinx-coroutines-android = { group = "org.jetbrains.kotlinx", name = "kotlinx-coroutines-android", version.ref = "kotlinx-coroutines" }
 androidx-recyclerview = { group = "androidx.recyclerview", name = "recyclerview", version.ref = "androidx-recyclerview" }
 wordpress-rs-android = { group = "rs.wordpress.api", name = "android", version.ref = "wordpress-rs" }
+androidx-compose-bom = { group = "androidx.compose", name = "compose-bom", version.ref = "composeBom" }
+androidx-compose-ui = { group = "androidx.compose.ui", name = "ui" }
+androidx-compose-material3 = { group = "androidx.compose.material3", name = "material3" }
+androidx-compose-ui-tooling-preview = { group = "androidx.compose.ui", name = "ui-tooling-preview" }
+androidx-activity-compose = { group = "androidx.activity", name = "activity-compose", version.ref = "activityCompose" }
 
 [plugins]
 android-application = { id = "com.android.application", version.ref = "agp" }
 jetbrains-kotlin-android = { id = "org.jetbrains.kotlin.android", version.ref = "kotlin" }
+jetbrains-kotlin-compose = { id = "org.jetbrains.kotlin.plugin.compose", version.ref = "kotlin" }
 android-library = { id = "com.android.library", version.ref = "agp" }