Fix phonebook refresh flicker and duplicate Android recent tasks

android/app/build.gradle.kts

@@ -179,6 +179,7 @@ android.applicationVariants.all {
 }
 
 dependencies {
+    testImplementation("junit:junit:4.13.2")
     coreLibraryDesugaring("com.android.tools:desugar_jdk_libs:2.1.4")
     implementation("androidx.media3:media3-transformer:1.9.3")
     implementation("androidx.media3:media3-effect:1.9.3")

android/app/src/main/AndroidManifest.xml

@@ -51,7 +51,8 @@
             android:icon="@mipmap/ic_launcher"
             android:label="ИКАР"
             android:launchMode="singleTask"
-            android:taskAffinity=""
+            android:taskAffinity="ru.ikar.app"
+            android:documentLaunchMode="never"
             android:theme="@style/LaunchTheme"
             android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
             android:hardwareAccelerated="true"

android/app/src/main/kotlin/ru/qlyra/app/MainActivity.kt

@@ -145,6 +145,10 @@ class MainActivity : AudioServiceFragmentActivity() {
                         result.success(apkSignerMatchesInstalled(path))
                     }
                 }
+                "launchApkInstaller" -> {
+                    val path = call.argument<String>("path")
+                    result.success(path != null && launchApkInstaller(path))
+                }
                 else -> result.notImplemented()
             }
         }
@@ -582,7 +586,36 @@ class MainActivity : AudioServiceFragmentActivity() {
         }.toSet()
     }
 
+    private fun launchApkInstaller(path: String): Boolean {
+        return try {
+            val apk = File(path).canonicalFile
+            if (!apk.isFile ||
+                !apk.path.startsWith(cacheDir.canonicalPath + File.separator) ||
+                !apkSignerMatchesInstalled(apk.path)
+            ) return false
+            val uri = androidx.core.content.FileProvider.getUriForFile(
+                this,
+                "$packageName.fileProvider.com.crazecoder.openfile",
+                apk,
+            )
+            val installer = Intent(Intent.ACTION_VIEW).apply {
+                addCategory(Intent.CATEGORY_DEFAULT)
+                setDataAndType(uri, "application/vnd.android.package-archive")
+                addFlags(
+                    Intent.FLAG_ACTIVITY_NEW_TASK or
+                        Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS or
+                        Intent.FLAG_GRANT_READ_URI_PERMISSION,
+                )
+            }
+            startActivity(installer)
+            true
+        } catch (_: Exception) {
+            false
+        }
+    }
+
     override fun onCreate(savedInstanceState: Bundle?) {
+        RecentAppTasks.removeDuplicates(this)
         if (intent?.hasExtra(CallConst.EXTRA_CALL) == true) applyCallWindowFlags()
         super.onCreate(savedInstanceState)
         applyKeepAwake()
@@ -594,6 +627,7 @@ class MainActivity : AudioServiceFragmentActivity() {
     override fun onNewIntent(intent: Intent) {
         super.onNewIntent(intent)
         setIntent(intent)
+        RecentAppTasks.removeDuplicates(this)
         if (intent.hasExtra(CallConst.EXTRA_CALL)) {
             applyCallWindowFlags()
             stashCall(intent, emit = true)

android/app/src/main/kotlin/ru/qlyra/app/RecentAppTasks.kt

@@ -0,0 +1,36 @@
+package ru.ikar.app
+
+import android.app.Activity
+import android.app.ActivityManager
+import android.os.Build
+import android.util.Log
+
+/** Removes old launcher cards retained across an APK replacement. */
+internal object RecentAppTasks {
+    fun removeDuplicates(activity: Activity) {
+        val manager = activity.getSystemService(ActivityManager::class.java) ?: return
+        val tasks = runCatching { manager.appTasks }.getOrElse { return }
+        for (task in tasks) {
+            try {
+                val info = task.taskInfo ?: continue
+                @Suppress("DEPRECATION")
+                val id = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
+                    info.taskId
+                } else {
+                    info.persistentId
+                }
+                val root = info.baseIntent.component ?: info.baseActivity
+                if (RecentTaskPolicy.isDuplicateHome(
+                        activity.taskId, id, activity.packageName,
+                        root?.packageName, root?.className,
+                    )
+                ) {
+                    task.finishAndRemoveTask()
+                }
+            } catch (_: Exception) {
+                // OEM task snapshots can disappear between enumeration and removal.
+                Log.w("IkarRecentTasks", "A stale task could not be removed")
+            }
+        }
+    }
+}

android/app/src/main/kotlin/ru/qlyra/app/RecentTaskPolicy.kt

@@ -0,0 +1,19 @@
+package ru.ikar.app
+
+internal object RecentTaskPolicy {
+    fun isDuplicateHome(
+        currentId: Int,
+        candidateId: Int,
+        applicationPackage: String,
+        rootPackage: String?,
+        rootClass: String?,
+    ): Boolean {
+        if (candidateId < 0 || candidateId == currentId) return false
+        if (rootPackage != applicationPackage) return false
+        return rootClass in setOf(
+            "$applicationPackage.MainActivity",
+            "$applicationPackage.MinimalIcon",
+            "$applicationPackage.IntentEntry",
+        )
+    }
+}

android/app/src/test/kotlin/ru/ikar/app/RecentTaskPolicyTest.kt

@@ -0,0 +1,41 @@
+package ru.ikar.app
+
+import org.junit.Assert.assertFalse
+import org.junit.Assert.assertTrue
+import org.junit.Test
+
+class RecentTaskPolicyTest {
+    private val app = "ru.ikar.app"
+
+    @Test
+    fun currentWindowIsNeverRemoved() {
+        assertFalse(RecentTaskPolicy.isDuplicateHome(12, 12, app, app, "$app.MainActivity"))
+    }
+
+    @Test
+    fun allOldHomeEntryPointsAreRecognized() {
+        for (entry in listOf("MainActivity", "MinimalIcon", "IntentEntry")) {
+            assertTrue(RecentTaskPolicy.isDuplicateHome(12, 9, app, app, "$app.$entry"))
+        }
+    }
+
+    @Test
+    fun anotherApplicationsTaskIsPreserved() {
+        assertFalse(RecentTaskPolicy.isDuplicateHome(12, 9, app, "com.android.packageinstaller", "$app.MainActivity"))
+    }
+
+    @Test
+    fun otherAppActivitiesArePreserved() {
+        assertFalse(RecentTaskPolicy.isDuplicateHome(12, 9, app, app, "$app.MediaPicker"))
+    }
+
+    @Test
+    fun disappearedTaskIsIgnored() {
+        assertFalse(RecentTaskPolicy.isDuplicateHome(12, -1, app, app, "$app.MainActivity"))
+    }
+
+    @Test
+    fun unidentifiedRootIsPreserved() {
+        assertFalse(RecentTaskPolicy.isDuplicateHome(12, 9, app, null, null))
+    }
+}