add colors props for android

lib/PullToRefreshView.android.js

@@ -1,44 +1,41 @@
-'use strict'
+'use strict';
 
-import React from 'react'
-import PropTypes from 'prop-types'
-import { View, RefreshControl, ScrollView } from 'react-native'
+import React from 'react';
+import PropTypes from 'prop-types';
+import { View, RefreshControl, ScrollView } from 'react-native';
 
 export default class PTRViewAndroid extends React.Component {
-  constructor () {
-    super()
+  constructor() {
+    super();
     this.state = {
       isLoading: false
-    }
+    };
   }
-  _delay () {
-    return new Promise((resolve) => {
-      setTimeout(resolve, this.props.delay)
-    })
+  _delay() {
+    return new Promise(resolve => {
+      setTimeout(resolve, this.props.delay);
+    });
   }
-  _handleOnRefresh () {
-    this.setState({ isLoading: true })
-    return new Promise((resolve) => {
-      Promise.all([
-        this.props.onRefresh(resolve),
-        this._delay()
-      ])
-        .then(() => {
-          this._endLoading()
-        })
-    })
+  _handleOnRefresh() {
+    this.setState({ isLoading: true });
+    return new Promise(resolve => {
+      Promise.all([this.props.onRefresh(resolve), this._delay()]).then(() => {
+        this._endLoading();
+      });
+    });
   }
-  _endLoading () {
+  _endLoading() {
     this.setState({
       isLoading: false
-    })
+    });
   }
-  render () {
+  render() {
     return (
       <ScrollView
         {...this.props}
         refreshControl={
           <RefreshControl
+            colors={this.props.colors}
             refreshing={this.state.isLoading}
             onRefresh={this._handleOnRefresh.bind(this)}
             progressViewOffset={this.props.offset}
@@ -47,7 +44,7 @@ export default class PTRViewAndroid extends React.Component {
       >
         {this.props.children}
       </ScrollView>
-    )
+    );
   }
 }
 
@@ -56,12 +53,12 @@ PTRViewAndroid.defaultProps = {
   progressBackgroundColor: '#fff',
   offset: 0,
   delay: 0
-}
+};
 
 PTRViewAndroid.propTypes = {
   delay: PropTypes.number,
   onRefresh: PropTypes.func,
   style: PropTypes.object,
-  children (props, propName, componentName) {
-  }
-}
+  colors: PropTypes.array,
+  children(props, propName, componentName) {}
+};