From c1741ea2308e9ef6bf4d634905eb148b6fe51dff Mon Sep 17 00:00:00 2001
From: Leonardo Monteiro Fernandes <leonardo.monteiro.fernandes@gmail.com>
Date: Mon, 13 Dec 2021 12:26:09 +1000
Subject: [PATCH] Fix memory leak - initially reported in
 https://github.com/apache/cordova-plugin-inappbrowser/issues/290

Whenever closing an InAppBrowser instance, a webview was left in memory with about:blank page.
This change fixes the issue by destroying and freeing the inAppWebView object.
---
 src/android/InAppBrowser.java | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/android/InAppBrowser.java b/src/android/InAppBrowser.java
index d141c0664..e73a75fcf 100644
--- a/src/android/InAppBrowser.java
+++ b/src/android/InAppBrowser.java
@@ -545,6 +545,16 @@ public void onPageFinished(WebView view, String url) {
                             dialog.dismiss();
                             dialog = null;
                         }
+
+                        // Fix for webView window not being destroyed correctly causing memory leak
+                        // (https://github.com/apache/cordova-plugin-inappbrowser/issues/290)
+                        if (url.equals("about:blank")) {
+                            inAppWebView.onPause();
+                            inAppWebView.removeAllViews();
+                            inAppWebView.destroyDrawingCache();
+                            inAppWebView.destroy();
+                            inAppWebView = null;
+                        }
                     }
                 });
                 // NB: From SDK 19: "If you call methods on WebView from any thread