From 8590e9190dfb9eb1609e7a6f93de2909f6006331 Mon Sep 17 00:00:00 2001
From: Robson Araujo <robson@fingo.ai>
Date: Tue, 11 Jun 2019 14:22:46 -0700
Subject: [PATCH] Avoid null pointer exception after webview is disposed

---
 .../flutter_inappbrowser/JavaScriptBridgeInterface.java       | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/android/src/main/java/com/pichillilorenzo/flutter_inappbrowser/JavaScriptBridgeInterface.java b/android/src/main/java/com/pichillilorenzo/flutter_inappbrowser/JavaScriptBridgeInterface.java
index 9f404803c..415fb134e 100644
--- a/android/src/main/java/com/pichillilorenzo/flutter_inappbrowser/JavaScriptBridgeInterface.java
+++ b/android/src/main/java/com/pichillilorenzo/flutter_inappbrowser/JavaScriptBridgeInterface.java
@@ -51,6 +51,10 @@ public void run() {
         getChannel().invokeMethod("onCallJsHandler", obj, new MethodChannel.Result() {
           @Override
           public void success(Object json) {
+            if (flutterWebView.webView == null) {
+              // The webview has already been disposed, ignore.
+              return;
+            }
             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
               flutterWebView.webView.evaluateJavascript("window." + name + "[" + _callHandlerID + "](" + json + "); delete window." + name + "[" + _callHandlerID + "];", null);
             }