readme and example update (#65)

* added getIcon method

if default icon is selected returns "default" else returns selected icon name

* brought try...catch back, removed unused in android part, stored coponentClass... in var

* added example and updated readme for getIcon

* Update README.md

README.md

@@ -108,12 +108,15 @@ protected List<ReactPackage> getPackages() {
 Now you can use the following code to change application icon:
 
 ```javascript
-import { changeIcon } from 'react-native-change-icon';
+import { changeIcon, getIcon } from 'react-native-change-icon';
 
 // Pass the name of icon to be enabled
 changeIcon('iconname');
-```
 
-`changeIcon` function returns a promise. The promise is resolved only when the icon is changed.
+//or get currently selected icon
+getIcon();
+```
 
+`changeIcon` function returns a promise. The promise is resolved only when the icon is changed.\
+`getIcon` function returns `Promise<string>` with the name of the selected icon or "default" if default icon is selected
 **Please refer to the example app for demo on implementation**

example/src/App.tsx

@@ -1,16 +1,25 @@
 import * as React from 'react';
 import { StyleSheet, View, Text, TouchableOpacity } from 'react-native';
-import { changeIcon } from 'react-native-change-icon';
+import { changeIcon, getIcon } from 'react-native-change-icon';
 
 export default function App() {
+  const [currentIconName, setCurrentIconName] = React.useState('')
+
   return (
     <View style={styles.container}>
-      <TouchableOpacity onPress={() => changeIcon('checked')}>
+      <TouchableOpacity onPress={() => {
+        changeIcon('checked')
+        getIcon().then(name=>setCurrentIconName(name))
+      }}>
         <Text style={styles.button}>SWITCH TO CHECKED ICON</Text>
       </TouchableOpacity>
-      <TouchableOpacity onPress={() => changeIcon('cancel')}>
+      <TouchableOpacity onPress={() => {
+        changeIcon('cancel')
+        getIcon().then(name=>setCurrentIconName(name))
+      }}>
         <Text style={styles.button}>SWITCH TO CANCEL ICON</Text>
       </TouchableOpacity>
+        <Text>{'Icon name: ' + currentIconName}</Text>
     </View>
   );
 }
@@ -26,5 +35,5 @@ const styles = StyleSheet.create({
     fontSize: 20,
     textAlign: 'center',
     margin: 10,
-  },
+  }
 });