diff --git a/app/src/main/java/com/qlh/crop/cropview/MainActivity.kt b/app/src/main/java/com/qlh/crop/cropview/MainActivity.kt
index 831d16d..77807f7 100644
--- a/app/src/main/java/com/qlh/crop/cropview/MainActivity.kt
+++ b/app/src/main/java/com/qlh/crop/cropview/MainActivity.kt
@@ -3,6 +3,9 @@ package com.qlh.crop.cropview
 import android.graphics.BitmapFactory
 import android.os.Bundle
 import android.support.v7.app.AppCompatActivity
+import android.view.ViewGroup
+import android.widget.RelativeLayout
+import android.widget.Toast
 import kotlinx.android.synthetic.main.activity_main.*
 
 
@@ -12,43 +15,14 @@ class MainActivity : AppCompatActivity() {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
 
-        //rect()
         cirCle()
     }
 
     private fun cirCle(){
-        circle_view.setSourceBitmap(BitmapFactory.decodeResource(resources,R.drawable.d))
-        circle_view.setCropBitmapCallBack {
+        crop_view.setSourceBitmap(BitmapFactory.decodeResource(resources,R.drawable.d))
+        crop_view.setCropBitmapCallBack {
             crop_img.setImageBitmap(it)
+            Toast.makeText(this,"裁剪完成",Toast.LENGTH_SHORT).show()
         }
     }
-
-    private fun rect(){
-        val b = BitmapFactory.decodeResource(resources,R.drawable.d)
-//        //图片尺寸
-//        val pw=b.width
-//        val ph=b.height
-//        val vto = bg.viewTreeObserver
-//        vto.addOnPreDrawListener(object :ViewTreeObserver.OnPreDrawListener{
-//            override fun onPreDraw(): Boolean {
-//                //TODO("not implemented")
-//                //imgView尺寸
-//                val imgW = bg.width
-//                val imgH = bg.height
-//                //比例
-//                val bx = imgW*1.0f/pw
-//                val bh = imgH*1.0f/ph
-//                //取最小值
-//                val lp = RelativeLayout.LayoutParams((min(bx,bh)*pw).toInt(), (min(bx,bh)*ph).toInt())
-//                lp.addRule(RelativeLayout.CENTER_IN_PARENT,RelativeLayout.TRUE)
-//                cut_rect.layoutParams = lp
-//                return true
-//            }
-//        })
-
-//        cut_rect.setCropBitmapCallBack {
-//            crop_img.setImageBitmap(it)
-//        }
-    }
-
 }
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index 4051930..fad720d 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -8,22 +8,24 @@
     <!--一般全屏，要和裁剪框尺寸匹配-->
     <ImageView
         android:id="@+id/bg"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:scaleType="fitCenter"
+        android:layout_width="500dp"
+        android:layout_height="500dp"
+        android:scaleType="fitXY"
+        android:layout_centerInParent="true"
         android:src="@drawable/d"/>
     <ImageView
         android:id="@+id/crop_img"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
+        android:layout_width="100dp"
+        android:layout_height="100dp"
         android:scaleType="centerInside"
         android:background="@color/white"/>
 
     <com.qlh.crop.cropviewlibrary.view.CropView
         android:visibility="visible"
-        android:id="@+id/circle_view"
-        android:layout_width="match_parent"
-        android:layout_height="match_parent"
+        android:id="@+id/crop_view"
+        android:layout_width="500dp"
+        android:layout_height="500dp"
+        android:layout_centerInParent="true"
         app:cv_border_line_color="@color/white"
         app:cv_corner_line_color="@color/white"
         app:cv_middle_line_color="@color/white"
diff --git a/cropviewlibrary/src/main/java/com/qlh/crop/cropviewlibrary/view/CropView.java b/cropviewlibrary/src/main/java/com/qlh/crop/cropviewlibrary/view/CropView.java
index afe24dc..60353aa 100644
--- a/cropviewlibrary/src/main/java/com/qlh/crop/cropviewlibrary/view/CropView.java
+++ b/cropviewlibrary/src/main/java/com/qlh/crop/cropviewlibrary/view/CropView.java
@@ -10,6 +10,7 @@
 import android.graphics.RectF;
 import android.graphics.Region;
 import android.util.AttributeSet;
+import android.util.Log;
 import android.view.MotionEvent;
 import android.view.View;
 
@@ -22,6 +23,9 @@
 /**
  * 作者：dell on 2018/9/7 18:26
  * 描述：绘制拍照推荐裁剪框
+ * <br>
+ *     本库目前只是简单的绘制和裁剪
+ *     </br>
  */
 public class CropView extends View {
 
@@ -239,6 +243,11 @@ else if (POINT_STATE == 1) {
         return true;
     }
 
+    @Override
+    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+    }
+
     /**
      * 初始化布局
      *
@@ -251,27 +260,9 @@ else if (POINT_STATE == 1) {
     @Override
     protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
         super.onLayout(changed, left, top, right, bottom);
-
-        //总高和总宽需要综合考虑view的宽和高和图片的宽和高
-        //但是由于异步机制，无法在onLayout之前获得偏移量，因此图片溢出改为消息提醒
-        /*
-        if(imageHeight==0){
-        	VIEW_HEIGHT = this.getHeight();
-        }else{
-        	if(imageHeight<this.getHeight())
-        		VIEW_HEIGHT=imageHeight;
-        	else
-        		VIEW_HEIGHT = this.getHeight()+getTranslationY();
-        }
-        if(imageWidth==0){
-        	VIEW_WIDTH = this.getWidth();
-        }else{
-        	if(imageWidth<this.getWidth())
-        		VIEW_WIDTH=imageWidth;
-        	else
-        		VIEW_WIDTH = this.getWidth()+getTranslationX();
-        }
-        */
+        //如果没有改变不用重新绘制，否则会导致移动裁剪框时重绘，不能保持当前状态
+        if (!changed){return;}
+        //获取视图尺寸
         VIEW_HEIGHT = this.getHeight();
         VIEW_WIDTH = this.getWidth();
         //初始化四个点的坐标