Add the ability to get the parent Activity of a View

Author: gahfy

src/main/java/androidx/core/view/View.kt

@@ -18,6 +18,8 @@
 
 package androidx.core.view
 
+import android.app.Activity
+import android.content.ContextWrapper
 import android.graphics.Bitmap
 import android.view.View
 import android.view.ViewGroup
@@ -201,6 +203,22 @@ fun View.toBitmap(config: Bitmap.Config = Bitmap.Config.ARGB_8888): Bitmap {
     }
 }
 
+/**
+ * Returns the parent [Activity] of this [View].
+ *
+ * If this View is not attached to any [Activity], this method will return null.
+ */
+inline fun <reified T:Activity> View.getParentActivity() : T? {
+    var context = this.context
+    while (context is ContextWrapper) {
+        if (context is T) {
+            return context
+        }
+        context = context.baseContext
+    }
+    return null
+}
+
 /**
  * Returns true when this view's visibility is [View.VISIBLE], false otherwise.
  *