From 779d42cdc3d0d99ee731c3f4fd02e98d44ef8980 Mon Sep 17 00:00:00 2001
From: maning <154292322@qq.com>
Date: Wed, 18 Aug 2021 12:30:21 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E6=94=B9README?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 README.md                                     | 21 ++++++++++++++-----
 .../zxingcodedemo/CustomScanActivity.java     |  3 ++-
 2 files changed, 18 insertions(+), 6 deletions(-)

diff --git a/README.md b/README.md
index c4a4070..a516b00 100644
--- a/README.md
+++ b/README.md
@@ -213,6 +213,17 @@
                     super.onDestroy();
                     mScanSurfaceView.onDestroy();
                 }
+
+                @Override
+                public void onBackPressed() {
+                    //多点扫描结果点显示，可以取消
+                    if (mScanSurfaceView != null && mScanSurfaceView.isResultPointViewShow()) {
+                        mScanSurfaceView.hideResultPointView();
+                        mScanSurfaceView.restartScan();
+                        return;
+                    }
+                    super.onBackPressed();
+                }
             }
 
         3：生成二维码：
@@ -263,6 +274,11 @@
 ```
 
 ## 版本记录：
+    v2.1.9:
+        1.扫描结果点显示位置偏移优化
+        2.扫描结果点View支持手动取消
+        3.扫描网格线显示优化
+        
     v2.1.8:
         1.扫描结果点显示位置偏移修复
         
@@ -270,11 +286,6 @@
         1.支持多二维码同时扫出
         2.优化扫描结果点
         3.zxing版本自定义
-        
-    v2.1.6:
-        1.优化代码，防止内存泄露
-        2.生成二维码支持修改颜色和边距
-        3.整体转为AndroidX
 
 
 ## 感谢：
diff --git a/app/src/main/java/com/maning/zxingcodedemo/CustomScanActivity.java b/app/src/main/java/com/maning/zxingcodedemo/CustomScanActivity.java
index c692e0d..5a067d4 100644
--- a/app/src/main/java/com/maning/zxingcodedemo/CustomScanActivity.java
+++ b/app/src/main/java/com/maning/zxingcodedemo/CustomScanActivity.java
@@ -101,7 +101,8 @@ public void stopScan(View view) {
 
     @Override
     public void onBackPressed() {
-        if (mScanSurfaceView.isResultPointViewShow()) {
+        //多点扫描结果点显示，可以取消
+        if (mScanSurfaceView != null && mScanSurfaceView.isResultPointViewShow()) {
             mScanSurfaceView.hideResultPointView();
             mScanSurfaceView.restartScan();
             return;