[update]:[update README,更新CustomWebview的教程]

README.md

@@ -129,6 +129,22 @@ for example:
 
 will print 'JS got a message hello' and 'JS responding with' in webview console.
 
+### Switch to CustomWebview
+* activity_main.xml
+```xml
+    <com.github.lzyzsd.jsbridge.example.CustomWebView
+        android:id="@+id/webView"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent" >
+     </com.github.lzyzsd.jsbridge.example.CustomWebView>
+```
+* MainActivity.java
+Class BridgeWebview change to CustomWebview;
+```java
+    CustomWebView webView = (CustomWebView) findViewById(R.id.webView);
+
+```
+
 ## Notice
 
 This lib will inject a WebViewJavascriptBridge Object to window object.