diff --git a/README.md b/README.md
index 24a2b25..93d3230 100644
--- a/README.md
+++ b/README.md
@@ -117,7 +117,7 @@ implementation 'com.king.zxing:zxing-lite:1.1.9'
 
 #### v1.x 说明
 
-[【v1.1.9】](https://github.com/jenly1314/ZXingLite/tree/androidx) 如果您正在使用 **1.x** 版本请点击下面的链接查看分支版本，当前 **2.x** 版本已经基于 **Camerx** 进行重构，不支持升级，请在新项目中使用。
+[【v1.1.9】](https://github.com/jenly1314/ZXingLite/tree/androidx) 如果您正在使用 **1.x** 版本请点击下面的链接查看分支版本，当前 **2.x** 版本已经基于 **CameraX** 进行重构，不支持升级，请在新项目中使用。
 
 查看AndroidX版 **1.x** 分支 [请戳此处](https://github.com/jenly1314/ZXingLite/tree/androidx)
 
diff --git a/app/release/app-release.apk b/app/release/app-release.apk
index bcb5020..60a7223 100644
Binary files a/app/release/app-release.apk and b/app/release/app-release.apk differ
diff --git a/app/src/main/java/com/king/zxing/app/QRCodeActivity.java b/app/src/main/java/com/king/zxing/app/QRCodeActivity.java
index 7feff4b..18ce0be 100644
--- a/app/src/main/java/com/king/zxing/app/QRCodeActivity.java
+++ b/app/src/main/java/com/king/zxing/app/QRCodeActivity.java
@@ -1,6 +1,7 @@
 package com.king.zxing.app;
 
 import android.os.Bundle;
+import android.view.View;
 import android.widget.TextView;
 
 import com.google.zxing.Result;
@@ -79,4 +80,12 @@ public class QRCodeActivity extends CaptureActivity {
          */
         return super.onScanResultCallback(result);
     }
+
+    public void onClick(View v){
+        switch (v.getId()){
+            case R.id.ivLeft:
+                finish();
+                break;
+        }
+    }
 }
diff --git a/versions.gradle b/versions.gradle
index f041fc2..ada9076 100644
--- a/versions.gradle
+++ b/versions.gradle
@@ -7,9 +7,9 @@ ext.app_version = app_version
 //build version
 def build_versions = [:]
 build_versions.minSdk = 21
-build_versions.targetSdk = 28
-build_versions.compileSdk = 28
-build_versions.buildTools = "28.0.3"
+build_versions.targetSdk = 29
+build_versions.compileSdk = 29
+build_versions.buildTools = "29.0.3"
 ext.build_versions = build_versions
 
 ext.deps = [:]
diff --git a/zxing-lite/src/main/java/com/king/zxing/ViewfinderView.java b/zxing-lite/src/main/java/com/king/zxing/ViewfinderView.java
index 8dab4dc..00ce6dd 100644
--- a/zxing-lite/src/main/java/com/king/zxing/ViewfinderView.java
+++ b/zxing-lite/src/main/java/com/king/zxing/ViewfinderView.java
@@ -34,6 +34,8 @@ import android.util.DisplayMetrics;
 import android.util.TypedValue;
 import android.view.View;
 
+import com.king.zxing.util.LogUtils;
+
 import androidx.annotation.ColorInt;
 import androidx.annotation.ColorRes;
 import androidx.annotation.Nullable;
@@ -113,6 +115,15 @@ public class ViewfinderView extends View {
      */
     public int scannerEnd = 0;
 
+    /**
+     * 扫码初始框宽
+     */
+    private int initFrameWidth;
+    /**
+     * 扫码初始框高
+     */
+    private int initFrameHeight;
+
     /**
      * 扫码框宽
      */
@@ -278,8 +289,8 @@ public class ViewfinderView extends View {
         labelTextWidth = array.getDimensionPixelSize(R.styleable.ViewfinderView_labelTextWidth,0);
         labelTextLocation = TextLocation.getFromInt(array.getInt(R.styleable.ViewfinderView_labelTextLocation,0));
 
-        frameWidth = array.getDimensionPixelSize(R.styleable.ViewfinderView_frameWidth,0);
-        frameHeight = array.getDimensionPixelSize(R.styleable.ViewfinderView_frameHeight,0);
+        initFrameWidth = array.getDimensionPixelSize(R.styleable.ViewfinderView_frameWidth,0);
+        initFrameHeight = array.getDimensionPixelSize(R.styleable.ViewfinderView_frameHeight,0);
 
         laserStyle = LaserStyle.getFromInt(array.getInt(R.styleable.ViewfinderView_laserStyle,LaserStyle.LINE.mValue));
         gridColumn = array.getInt(R.styleable.ViewfinderView_gridColumn,20);
@@ -328,22 +339,30 @@ public class ViewfinderView extends View {
         this.labelTextSize = textSize;
     }
 
+    @Override
+    protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
+        super.onLayout(changed, left, top, right, bottom);
+        LogUtils.d("onLayout" + getWidth() + "," + getHeight());
+        initFrame(getWidth(),getHeight());
+    }
 
     @Override
     protected void onSizeChanged(int w, int h, int oldw, int oldh) {
         super.onSizeChanged(w, h, oldw, oldh);
-        initFrame(w,h);
+        LogUtils.d("onSizeChanged" + w + "," + h);
+
     }
 
+
     private void initFrame(int width,int height){
 
         int size = (int)(Math.min(width,height) * frameRatio);
 
-        if(frameWidth <= 0 || frameWidth > width){
+        if(initFrameWidth <= 0 || initFrameWidth > width){
             frameWidth = size;
         }
 
-        if(frameHeight <= 0 || frameHeight > height){
+        if(initFrameHeight <= 0 || initFrameHeight > height){
             frameHeight = size;
         }