feat: android app list page with search and icons

app/src/main/java/top/yeij/hearth/MainActivity.kt

@@ -6,6 +6,8 @@ import android.os.Bundle
 import android.util.Log
 import android.view.WindowInsets
 import android.view.WindowInsetsController
+import top.yeij.hearth.app.AndroidAppSource
+import top.yeij.hearth.app.AppRepository
 import top.yeij.hearth.webview.JsBridge
 import top.yeij.hearth.webview.WebViewManager
 
@@ -36,6 +38,7 @@ class MainActivity : Activity() {
             deviceHeightPx = dm.heightPixels,
             density = dm.density,
             darkMode = darkMode,
+            appRepository = AppRepository(AndroidAppSource(this)),
         )
         WebViewManager(this).attach(bridge)
         Log.d(

app/src/main/java/top/yeij/hearth/app/AppRepository.kt

@@ -2,7 +2,12 @@ package top.yeij.hearth.app
 
 import android.content.Context
 import android.content.Intent
+import android.graphics.Bitmap
+import android.graphics.Canvas
+import android.graphics.drawable.Drawable
+import android.util.Base64
 import android.util.Log
+import java.io.ByteArrayOutputStream
 
 data class AppInfo(val packageName: String, val label: String, val iconBase64: String?)
 
@@ -17,7 +22,7 @@ class AndroidAppSource(private val context: Context) : AppSource {
         val intent = Intent(Intent.ACTION_MAIN).addCategory(Intent.CATEGORY_LAUNCHER)
         return pm.queryIntentActivities(intent, 0).map { ri ->
             val pkg = ri.activityInfo.packageName
-            AppInfo(pkg, ri.loadLabel(pm).toString(), null /* 图标 base64 在 Task 5 补 */)
+            AppInfo(pkg, ri.loadLabel(pm).toString(), drawableToBase64(ri.loadIcon(pm)))
         }
     }
 
@@ -27,6 +32,18 @@ class AndroidAppSource(private val context: Context) : AppSource {
         context.startActivity(i)
         return true
     }
+
+    // 图标 Drawable → 96px PNG base64 字符串（含 data:image/png;base64, 前缀）
+    // Convert app icon Drawable to a 96px PNG base64 string (with data:image/png;base64, prefix)
+    private fun drawableToBase64(d: Drawable, size: Int = 96): String {
+        val bmp = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888)
+        val canvas = Canvas(bmp)
+        d.setBounds(0, 0, size, size)
+        d.draw(canvas)
+        val out = ByteArrayOutputStream()
+        bmp.compress(Bitmap.CompressFormat.PNG, 100, out)
+        return "data:image/png;base64," + Base64.encodeToString(out.toByteArray(), Base64.NO_WRAP)
+    }
 }
 
 class AppRepository(private val source: AppSource) {

app/src/main/java/top/yeij/hearth/webview/JsBridge.kt

@@ -1,12 +1,14 @@
 package top.yeij.hearth.webview
 
 import android.util.Log
+import top.yeij.hearth.app.AppRepository
 
 class JsBridge(
     private val deviceWidthPx: Int,
     private val deviceHeightPx: Int,
     private val density: Float,
     private val darkMode: Boolean,
+    private val appRepository: AppRepository? = null,
 ) {
     private val gson = com.google.gson.Gson()
 
@@ -22,4 +24,14 @@ class JsBridge(
             )
         )
     }
+
+    // 返回已安装应用列表 JSON（无仓库时返回空数组）
+    // Return installed app list JSON (empty array when no repository wired)
+    @android.webkit.JavascriptInterface
+    fun listApps(): String = appRepository?.listApps() ?: "[]"
+
+    // 启动指定包名应用，成功返回 true（无仓库时返回 false）
+    // Launch an app by package name, true on success (false when no repository wired)
+    @android.webkit.JavascriptInterface
+    fun launchApp(packageName: String): Boolean = appRepository?.launchApp(packageName) ?: false
 }