Adds app is foregrouded

Author: ospfranco

OpacityCore/src/main/cpp/OpacityCore.cpp

@@ -186,6 +186,13 @@ extern "C" const char *get_ip_address() {
   return result; // Caller must free this memory
 }
 
+extern "C" bool android_is_app_foregrounded() {
+  JNIEnv *env = GetJniEnv();
+  jclass jOpacityCore = env->GetObjectClass(java_object);
+  jmethodID method = env->GetMethodID(jOpacityCore, "isAppForegrounded", "()Z");
+  return env->CallBooleanMethod(java_object, method);
+}
+
 extern "C" void android_close_webview() {
   JNIEnv *env = GetJniEnv();
   // Get the Kotlin class

OpacityCore/src/main/kotlin/com/opacitylabs/opacitycore/OpacityCore.kt

@@ -59,6 +59,23 @@ object OpacityCore {
         return sRuntime
     }
 
+    fun isAppForegrounded(): Boolean {
+        return try {
+            val activityManager = appContext.getSystemService(Context.ACTIVITY_SERVICE) as android.app.ActivityManager
+            val runningProcesses = activityManager.runningAppProcesses
+            if (runningProcesses != null) {
+                for (processInfo in runningProcesses) {
+                    if (processInfo.processName == appContext.packageName) {
+                        return processInfo.importance == android.app.ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND
+                    }
+                }
+            }
+            false
+        } catch (e: Exception) {
+            false
+        }
+    }
+
     fun securelySet(key: String, value: String) {
         cryptoManager.set(key, value)
     }