优化代码结构

example/src/app.js

 import {StackNavigator} from 'react-navigation'
 import Examples from './examples'
-import MapTypes from './map-types'
-import Layers from './layers'
-import Indoor from './indoor'
-import Controls from './controls'
-import Gestures from './gestures'
-import Marker from './marker'
-import Polyline from './polyline'
-import Polygon from './polygon'
+import MapTypes from './examples/map-types'
+import Layers from './examples/layers'
+import Indoor from './examples/indoor'
+import Controls from './examples/controls'
+import Gestures from './examples/gestures'
+import Marker from './examples/marker'
+import Polyline from './examples/polyline'
+import Polygon from './examples/polygon'
 
 export default StackNavigator({
   Examples: {screen: Examples},

example/src/marker.js → example/src/examples/marker.js

@@ -52,7 +52,7 @@ export default class MarkerExample extends Component {
       <Marker
         icon={() =>
           <Overlay style={styles.customIcon}>
-            <Image style={styles.customIcon} source={require('../images/marker.png')}/>
+            <Image style={styles.customIcon} source={require('../../images/marker.png')}/>
           </Overlay>
         }
         title='自定义图片'