Permissions权限申请实例

async function requestCameraPermission() {
 try {
 const granted = await PermissionsAndroid.request(
 PermissionsAndroid.PERMISSIONS.CAMERA,
 {
 'title': 'Cool Photo App Camera Permission',
 'message': 'Cool Photo App needs access to your camera ' +
 'so you can take awesome pictures.'
 }
 )
 if (granted === PermissionsAndroid.RESULTS.GRANTED) {
 console.log("You can use the camera")
 } else {
 console.log("Camera permission denied")
 }
 } catch (err) {
 console.warn(err)
 }
}