Create an alternative of AsyncTask for handling thread-switching requ…

…irements

WordPress/src/main/java/org/wordpress/android/datasets/AsyncTaskHandler.kt

@@ -0,0 +1,32 @@
+package org.wordpress.android.datasets
+
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+
+/**
+ * Helper class to handle async tasks by using coroutines
+ */
+object AsyncTaskHandler {
+    /**
+     * Load data in the background and handle the result on the main thread
+     */
+    @JvmStatic
+    fun <T> load(backgroundTask: () -> T, callback: AsyncTaskCallback<T>) {
+        CoroutineScope(Dispatchers.IO).launch {
+            // handle the background task
+            val result = backgroundTask()
+
+            withContext(Dispatchers.Main) {
+                // handle the result on the main thread
+                callback.onTaskFinished(result)
+            }
+        }
+    }
+
+    interface AsyncTaskCallback<T> {
+        fun onTaskFinished(result: T)
+    }
+}
+