chore: added basic usage code to README.md

README.md

@@ -23,10 +23,60 @@ from [this example](https://snack.expo.dev/8mHmLfcZf).
 
 ## Usage
 
-You can find runnable examples in the `examples` subdirectory, which is a
-working [Expo](https://github.com/expo/expo) project demonstrating this library.
-Navigate into the `examples` subdirectory, run `npm install`, and then run
-`npx expo start` to see the examples working.
+### Basic usage
+
+The following code shows basic usage of the library:
+
+```
+import React, { useState } from 'react';
+import { View, Text } from 'react-native';
+import DropDownPicker from 'react-native-dropdown-picker';
+
+export default function App() {
+  const [open, setOpen] = useState(false);
+  const [value, setValue] = useState(null);
+  const [items, setItems] = useState([
+    { label: 'Apple', value: 'apple' },
+    { label: 'Banana', value: 'banana' },
+    { label: 'Pear', value: 'pear' },
+  ]);
+
+  return (
+    <View style={{ flex: 1 }}>
+      <View
+        style={{
+          flex: 1,
+          alignItems: 'center',
+          justifyContent: 'center',
+          paddingHorizontal: 15,
+        }}>
+        <DropDownPicker
+          open={open}
+          value={value}
+          items={items}
+          setOpen={setOpen}
+          setValue={setValue}
+          setItems={setItems}
+          placeholder={'Choose a fruit.'}
+        />
+      </View>
+
+      <View style={{ flex: 1, alignItems: 'center', justifyContent: 'center' }}>
+        <Text>Chosen fruit: {value === null ? 'none' : value}</Text>
+      </View>
+    </View>
+  );
+}
+```
+
+### Further information on usage
+
+You can find more examples in the `examples` subdirectory. This subdirectory is
+a working [Expo](https://github.com/expo/expo) project demonstrating this
+library. It shows how to use the library with class components as well as
+function components, and in TypeScript as well as in JavaScript. Navigate into
+the `examples` subdirectory, run `npm install`, and then run `npx expo start` to
+see the examples working.
 
 For further information on how to use this library,
 read [the relevant documentation](https://hossein-zare.github.io/react-native-dropdown-picker-website/docs/usage).