I made expo initial app
My code:
import React from 'react';
import { StyleSheet, Text, View } from 'react-native';
import NfcManager, {NfcEvents} from 'react-native-nfc-manager';
export default function App() {
return (
<View style={styles.container}>
<Text>Open up App.js to start working on your app!</Text>
</View>
);
}
const styles = StyleSheet.create({
container: {
flex: 1,
backgroundColor: '#fff',
alignItems: 'center',
justifyContent: 'center',
},
});
When I trying to import NFC manager Im getting error: Native module cannot be null
screenshot
Google said that its error with IOS notifications, Im coding from windows VScode and cannot link push notifications, how I can solve this error? I cannot code without expo because this is only one way to simulate my app from windows on iphone as I understand
I solve it: expo not allowing additional libraries
Related
I have a React Native - Expo Android mobile app that we are using to send text messages out to customers to let them know when we arrive, currently using Twilio and it is expensive, I have tried many code examples to send a text message directly from the phone and they all seem to go outside the app and want to send the text message through the phone's default message app eg Messages, we want to stay in our app and send them.
My question is:
Is there a way to do this? If so how?
If not what is a cheaper solution than Twilio to send texts that will work in a React Native - Expo app?
I have been trying to find a solution now for quite awhile.
Thanks in advance for your help!
I have tried many code examples with no luck, here is an example of the code I have tried:
Here is an example of the code I am trying:
/** #format */
import { StatusBar } from "expo-status-bar";
import { StyleSheet, Text, View } from "react-native";
import { Entypo } from "#expo/vector-icons";
import Communications from "react-native-communications";
export default function App() {
return (
<View style={styles.container}>
<Text style={styles.textStyle}>SmS App</Text>
<Entypo
name="message"
size={70}
color="#202668"
onPress={() => Communications.text(
'3435447131',
'Hello'
)}
/>
<StatusBar style="auto" />
</View>
);
}
const styles = StyleSheet.create({
container: {
flex: 1,
backgroundColor: "#fff",
alignItems: "center",
justifyContent: "center",
},
textStyle: {
fontWeight: "bold",
fontSize: 30,
color: "#2AB4F3",
bottom: 10,
},
});
I'm newly developing in react native.
To start I used npx react-native init hello_world --template react-native-template-typescript to create the basic code and then I replaced app.tsx with this code:
import React from 'react';
import {StyleSheet, Text, View} from 'react-native';
const App = () => {
return (
<View style={styles.helloWorldContainer}>
<Text style={{fontSize: 18}}>Hello, world!</Text>
</View>
);
};
const styles = StyleSheet.create({
helloWorldContainer: {
flex: 1,
justifyContent: 'center',
alignItems: 'center',
},
});
export default App;
And these are the errors that I get when I am in debug mode:
If I remove the style of the component Text the error disappears.
My question is how can I fix the error while keeping the style in the component Text.
I saw that chrome has a lot of errors, exist another better debugger?
As what Lucas Azambuja Santos referred to, it's a bug in react-native 0.65.* check out the new issue https://github.com/facebook/react-native/issues/32197
it should be fixed with 0.66, to workaround downgrade to 0.64.x and rebuild:
cd android && ./gradlew clean cleanBuildCache
using the snack below:
https://snack.expo.io/ry_5rCk84
I am trying to display the icon 'wifi_off' using Material Icons in my react native app (just shared this as a snack on expo for easier sharing) but this is not a recognised value for prop 'name'.
and ends up displaying a '?' for unknown icon.
I am able to use wifi-off icon using 'material-community' icon set
import * as React from 'react';
import { Text, View, StyleSheet } from 'react-native';
import { Constants } from 'expo';
import {Icon} from 'react-native-elements';
// You can import from local files
import AssetExample from './components/AssetExample';
// or any pure javascript modules available in npm
import { Card } from 'react-native-paper';
export default class App extends React.Component {
render() {
return (
<View style={styles.container}>
<Text style={styles.paragraph}>
Change code in the editor and watch it change on your phone! Save to get a shareable url.
</Text>
<Card>
<AssetExample />
</Card>
<Icon name='wifi' size={50} type='material'/>
<Icon name='wifi-off' size={50} type='material-community' />
<Icon name='wifi_off' size={50} type='material' />
</View>
);
}
}
const styles = StyleSheet.create({
container: {
flex: 1,
justifyContent: 'center',
paddingTop: Constants.statusBarHeight,
backgroundColor: '#ecf0f1',
padding: 8,
},
paragraph: {
margin: 24,
fontSize: 18,
fontWeight: 'bold',
textAlign: 'center',
},
});
react-native-elements uses react-native-vector-icons to display the icons.
react-native-vector-icons has a directory where you can check which icons are available, you can look them up by name. https://oblador.github.io/react-native-vector-icons/
If you search for all the icons that have wifi in their name you find the following result for MaterialIcons and MaterialCommunityIcons
If you search for wifi_off you will find that there are no results.
Therefore wifi_off is not available to use.
It is also worth noting that react-native-elements currently doesn't support the latest version of react-native-vector-icons, you can see that in this currently open issue.
When you are using react native elements Icon, behind the scenes it is searching in a list https://github.com/oblador/react-native-vector-icons/blob/master/glyphmaps/MaterialIcons.json, here you can find the names of the Icons that are supported and as you can see "wifi_off" is not here, maybe you can try "signal-wifi-off".
Advance, sorry if my english is not the best.
I've not been working on React Native for a very long time and now I have to implement an app with it. I currently use:
Android Studio 3.3
Android 9.0 Api 28
React Native 0.57.8
React Router 4.3.1
React Router Native 4.3.0
React Router Navigation 2.0.0-alpha.10
By the time I added the router, the styles worked like backgroundColor. Since then, the background of the app is only white and no matter which component I can't e.g. do represent a border when I use a view.
Have I might have missed something?
I have already tested the View element at every point. Same result. As I said, before I used React Router, it worked. With the integration of React Native Paper and Redux, there were no problems. I also tried customizing the styles.xml. Although this does work for permanently changing the background color, that's why I still can not put Border in any component. I also tried "component" instead of "render" in the Card component. And also with its own layout component.
App.js
import React from 'react'
import { StyleSheet, View } from 'react-native'
import { Provider as StoreProvider } from 'react-redux'
import { createStore } from 'redux'
import reducers from './reducers'
import { NativeRouter } from 'react-router-native'
import { Navigation, Card } from 'react-router-navigation'
import { Provider as PaperProvider } from 'react-native-paper'
import theme from './assets/js/theme'
import { Login } from './components/Views'
const appStyles = StyleSheet.create({
root: {
backgroundColor: theme.colors.background
}
})
export default App = () => {
return (
<View styles={ appStyles.root }>
<StoreProvider store={createStore(reducers)}>
<PaperProvider theme={theme}>
<NativeRouter>
<Navigation hideNavBar>
<Card
exact
path="/"
render={() => <Login/>}
/>
</Navigation>
</NativeRouter>
</PaperProvider>
</StoreProvider>
</View>
)
}
part of Login.js
const loginStyles = StyleSheet.create({
login: {
width: 400,
height: 400,
borderWidth: 4,
borderColor: theme.colors.error,
borderRadius: 3,
padding: 20,
justifyContent: 'center'
}
})
class Login extends Component {
render() {
console.log('LOGIN')
return (
<View styles={loginStyles.login}>
<Text style={{ color: theme.colors.error, alignSelf: 'center' }}>Test</Text>
</View>
)
}
}
None of it worked. Thanks for help.
I solved it myself. I am now using React Native Router Flux. I am still learning and trying out.
react-native-fontawesome was working just fine for me at version 5. I upgraded to 6.0.1 but downloading the new font-awesome files, adding the new tff files into the assets/fonts folder, running react-native link react-native-fontawesome.
I closed my simulators and ran react-native run-ios and see that the icons that worked before are now question marks. They don't show up on Android either
Firstly you need to install the dependency and link the library by the following ways...
Run the following command to install the dependency.
npm install react-native-vector-icons --save
Linking of Dependency...
After the updation of React Native 0.60, they have introduced the auto-linking feature means we do not require to link the library but they have also mentioned that some libraries need linking and react-native-vector-icons is one of those cases. So for that, we need to link the library using.
react-native link react-native-vector-icons
And copy the given App.js file that shows below.
/*Example of React Native Vector Icon*/
import React, {Component} from 'react';
//import React
import {Platform, StyleSheet, Text, View} from 'react-native';
//import all the basic components
import Icon from 'react-native-vector-icons/FontAwesome';
//import vector icons
type Props = {};
export default class App extends Component<Props> {
render() {
Icon.getImageSource('user', 20, 'red').then((source) => this.setState({ userIcon: source }));
return (
<View style={styles.container}>
<Text>Example of Vector Icon</Text>
<View style={{marginTop:16, marginBottom:16, justifyContent:'center', alignItems:'center', textAlign:'center'}}>
<Text><Icon name="rocket" size={'{30}'} color="#900" /></Text>
{/*Icon Component*/}
<Icon name="rocket" size={30} color="#900" />
</View>
<View style={{marginTop:16, marginBottom:16}}>
{/*Icon.Button Component*/}
<Icon.Button name="facebook" backgroundColor="#3b5998" onPress={()=>alert("Login with Facebook")}>
Login with Facebook
</Icon.Button>
</View>
</View>
);
}
}
const styles = StyleSheet.create({
container: {
flex: 1,
justifyContent: 'center',
alignItems: 'center',
backgroundColor: '#F5FCFF',
}
});
or you can follow the following link...
https://aboutreact.com/react-native-vector-icons/