Finish permissions util

App.tsx

@@ -5,9 +5,11 @@
  * @format
  */
 
-import React, {useState} from 'react';
+import React, {useEffect, useState} from 'react';
 import {
   Button,
+  PermissionsAndroid,
+  Platform,
   SafeAreaView,
   ScrollView,
   StatusBar,
@@ -19,6 +21,7 @@ import {
 
 import {Colors} from 'react-native/Libraries/NewAppScreen';
 import {BleManager, Device} from 'react-native-ble-plx';
+import requestBluetoothPermission from './utils/permissions';
 
 function App(): JSX.Element {
   const isDarkMode = useColorScheme() === 'dark';
@@ -29,7 +32,12 @@ function App(): JSX.Element {
   const backgroundStyle = {
     backgroundColor: isDarkMode ? Colors.darker : Colors.lighter,
   };
-
+  const handlePermissions = async () => {
+    await requestBluetoothPermission();
+  };
+  useEffect(() => {
+    handlePermissions();
+  }, []);
   const manager = new BleManager();
 
   const UUID = '4fafc201-1fb5-459e-8fcc-c5c9c331914b';

utils/permissions.ts

@@ -0,0 +1,46 @@
+import {PermissionsAndroid, Platform} from 'react-native';
+
+const requestBluetoothPermission = async () => {
+  if (Platform.OS === 'ios') {
+    return true;
+  }
+  if (
+    Platform.OS === 'android' &&
+    PermissionsAndroid.PERMISSIONS.ACCESS_FINE_LOCATION
+  ) {
+    const apiLevel = parseInt(Platform.Version.toString(), 10);
+
+    if (apiLevel < 31) {
+      const granted = await PermissionsAndroid.request(
+        PermissionsAndroid.PERMISSIONS.ACCESS_FINE_LOCATION,
+      );
+      console.log('Permission granted?', granted);
+      return granted === PermissionsAndroid.RESULTS.GRANTED;
+    }
+    if (
+      PermissionsAndroid.PERMISSIONS.BLUETOOTH_SCAN &&
+      PermissionsAndroid.PERMISSIONS.BLUETOOTH_CONNECT
+    ) {
+      const result = await PermissionsAndroid.requestMultiple([
+        PermissionsAndroid.PERMISSIONS.BLUETOOTH_SCAN,
+        PermissionsAndroid.PERMISSIONS.BLUETOOTH_CONNECT,
+        PermissionsAndroid.PERMISSIONS.ACCESS_FINE_LOCATION,
+      ]);
+      console.log('Permission granted!');
+      return (
+        result['android.permission.BLUETOOTH_CONNECT'] ===
+          PermissionsAndroid.RESULTS.GRANTED &&
+        result['android.permission.BLUETOOTH_SCAN'] ===
+          PermissionsAndroid.RESULTS.GRANTED &&
+        result['android.permission.ACCESS_FINE_LOCATION'] ===
+          PermissionsAndroid.RESULTS.GRANTED
+      );
+    }
+  }
+
+  console.log('Permission have not been granted');
+
+  return false;
+};
+
+export default requestBluetoothPermission;