increase accuracy of activity events

Author: codehasan

app/src/main/java/io/github/ratul/topactivity/extensions/GenericExtensions.kt

@@ -16,7 +16,9 @@
  */
 package io.github.ratul.topactivity.extensions
 
+import android.content.ComponentName
 import android.content.Context
+import android.content.pm.PackageManager
 import android.os.Build
 import android.util.DisplayMetrics
 import android.util.TypedValue
@@ -60,4 +62,18 @@ fun WindowManager.getScreenSize(): Pair<Int, Int> {
         defaultDisplay.getMetrics(displayMetrics)
         Pair(displayMetrics.widthPixels, displayMetrics.heightPixels)
     }
+}
+
+fun PackageManager.isActivity(pkg: String, cls: String): Boolean {
+    return try {
+        val component = ComponentName(pkg, cls)
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.TIRAMISU) {
+            getActivityInfo(component, 0)
+        } else {
+            getActivityInfo(component, PackageManager.ComponentInfoFlags.of(0))
+        }
+        true
+    } catch (_: PackageManager.NameNotFoundException) {
+        false
+    }
 }

app/src/main/java/io/github/ratul/topactivity/services/AccessibilityMonitoringService.kt

@@ -19,19 +19,33 @@ package io.github.ratul.topactivity.services
 import android.accessibilityservice.AccessibilityService
 import android.annotation.SuppressLint
 import android.content.Intent
+import android.util.LruCache
 import android.view.accessibility.AccessibilityEvent
+import io.github.ratul.topactivity.extensions.isActivity
 import io.github.ratul.topactivity.repository.DataRepository
 
 @SuppressLint("AccessibilityPolicy")
 class AccessibilityMonitoringService : AccessibilityService() {
 
+    private val activityCache = LruCache<String, Boolean>(500)
+
     override fun onAccessibilityEvent(event: AccessibilityEvent) {
         if (!DataRepository.appState.value.running) return
 
-        val pkgName = event.packageName?.toString() ?: return
-        val className = event.className?.toString() ?: return
+        val pkg = event.packageName?.toString() ?: return
+        val cls = event.className?.toString() ?: return
+        val cacheKey = "$pkg/$cls"
+
+        val isCachedActivity = activityCache[cacheKey]
+        if (isCachedActivity != null) {
+            if (isCachedActivity) DataRepository.updateData(pkg, cls)
+            return
+        }
+
+        val isActivity = packageManager.isActivity(pkg, cls)
+        activityCache.put(cacheKey, isActivity)
 
-        DataRepository.updateData(pkgName, className)
+        if (isActivity) DataRepository.updateData(pkg, cls)
     }
 
     override fun onInterrupt() {}
@@ -51,6 +65,11 @@ class AccessibilityMonitoringService : AccessibilityService() {
         return true
     }
 
+    override fun onDestroy() {
+        instance = null
+        super.onDestroy()
+    }
+
     companion object {
         var instance: AccessibilityMonitoringService? = null
             private set