修改下拉刷新android专用和重复background。review by luliang。

+/**
+ * Description:
+ *
+ * Author:  Bruce.Lu
+ * Version: 1.0
+ * Created on 2017/2/23.
+ */
+import React from 'react';
+import ReactNative from 'react-native';
+
+let {
+    requireNativeComponent,
+    View
+} = ReactNative;
+
+let YH_PtrRefreshView = requireNativeComponent('YH_PtrRefresh', null);
+
+export default class YH_PtrRefresh extends React.Component {
+
+    static propTypes = {
+        ...View.propTypes // 包含默认的View的属性
+    };
+
+    constructor(props) {
+        super(props);
+    }
+
+    render() {
+        return <YH_PtrRefreshView {...this.props} data={this.props.data} />;
+    }
+}

@@ -8,13 +8,6 @@
 import React from 'react';
 import ReactNative from 'react-native';
 
-let {
-    requireNativeComponent,
-    View
-} = ReactNative;
-
-let YH_PtrRefreshView = requireNativeComponent('YH_PtrRefresh', null);
-
 export default class YH_PtrRefresh extends React.Component {
 
     static propTypes = {
@@ -26,6 +19,6 @@ export default class YH_PtrRefresh extends React.Component {
     }
 
     render() {
-        return <YH_PtrRefreshView {...this.props} data={this.props.data} />;
+        return null;
     }
 }

@@ -119,7 +119,6 @@ let styles = StyleSheet.create({
         marginLeft: 15,
         marginTop: 10,
         marginBottom: 10,
-        backgroundColor: 'transparent',
         width: 46,
         height: 60,
         backgroundColor: 'white'