I am new to React Native.
I am using Android Emulator from Android Studio, and I did not change anything at all from any .json file... Whenever the emulator is running it's always a blank screen... It does not display any single error by the way...
App.js:
import React from 'react';
import { StyleSheet, Text, View } from 'react-native';
class App extends React.Component {
render() {
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',
},
});
export default App;
Just press R two times... that simple, yes...
Related
I created a react native app with expo. However, when I run it using expo start I get a fully white screen with nothing else displayed.
Screenshot:
Code :
import { StatusBar } from 'expo-status-bar';
import { StyleSheet, Text, View } from 'react-native';
export default function App() {
return (
<View style={styles.container}>
<Text>Open up App.js to start working on your app!</Text>
<StatusBar style="auto" />
</View>
);
}
const styles = StyleSheet.create({
container: {
flex: 1,
backgroundColor: '#fff',
alignItems: 'center',
justifyContent: 'center',
},
});
This is usually a network error. Try using npx expo start --offline
If you are running it on device, it might be because of styling of Text. Try giving some style to it:
<Text style={{color: "black"}}>Open up App.js to start working on your app!</Text>
I simply created a react-native-project using expo and added react-native-tts and tried to use the speak function but it is giving Native module cannot be null.
import { StatusBar } from 'expo-status-bar';
import React from 'react';
import { Button, StyleSheet, Text, View } from 'react-native';
import Tts from 'react-native-tts';
export default function App() {
return (
<View style={styles.container}>
<Button
onPress = {() => {Tts.speak("Hello, world!")}}
title = "voice"
/>
<StatusBar style="auto" />
</View>
);
}
const styles = StyleSheet.create({
container: {
flex: 1,
backgroundColor: '#fff',
alignItems: 'center',
justifyContent: 'center',
},
});
This is an expo project and react-native-tts is not made for expo. So for text to speech I need to use expo-speech or eject the project from expo.
Im very new to react-native and expo.
I can't solve this problem myself.
My previous code was this.
import React, {Component} from 'react';
import { View, Text, StyleSheet, TouchableOpacity } from 'react-native';
import firebase from 'firebase';
export default class Home extends React.Component {
handleSignOut = () => {
firebase
.auth()
.signOut()
.then(result => alert('sign out success'))
.catch(error => console.error(error));
};
render() {
return (
<View style={styles.container}>
<Text>Main</Text>
<TouchableOpacity onPress={this.handleSignOut}>
<Text>Sign Out</Text>
</TouchableOpacity>
</View>
);
}
}
const styles = StyleSheet.create({
container: {
flex: 1,
backgroundColor: '#fff',
alignItems: 'center',
justifyContent: 'center'
}
});
Then I just changed the text 'Main' to 'Home' and saved.
After that expo client was reloaded but nothing changed :(
I would appreciate it if you could give me any advices!
Not sure which version of Expo you're using (expo --version), but I spun off a quick Expo project, copy pasted your code (minus the Firebase parts) and it works seamlessly.
Maybe try closing and reopening your emulator/simulator.
I am just importing my files from a custom created folder component to App.js file and import key in not working on manually created files while working on other imports on React and React native.
I am making an application of React-Native using Expo CliCode Image
import React from 'react';
import { StyleSheet, Text, View } from 'react-native';
import test from './component/test'; // This line is producing error
export default function App() {
return (
<View style={styles.container}>
<test/>
<Text>Open up App.js to start working on your app!</Text>
</View>
);
}
const styles = StyleSheet.create({`enter code here`
container: {
flex: 1,
backgroundColor: '#fff',
alignItems: 'center',
justifyContent: 'center',
},
});
TEST COMPONENT :----
import React from 'react';
import { StyleSheet, Text, View } from 'react-native';
export default class Test extends React.Component {
render(){
return (
<View style={styles.container}>
<Text>Login js file</Text>
</View>
);
}
}
const styles = StyleSheet.create({
container: {
flex: 1,
backgroundColor: '#fff',
alignItems: 'center',
justifyContent: 'center',
},
});
PLEASE VISIT CODE IMAGE line 3 is causing error
https://i.stack.imgur.com/WRYAt.png
I have an error with a blue screen when I execute expo start, it says:
something went wrong. could not load exp://169.254.12.63:19000.Networkresponse time out
There is also a link that says:
view error log" and there say: "uncaught Error: java.net.SocketTimeOutExeption:connect timed out
This is my App.js
import React from 'react';
import { StyleSheet, Text, View } from 'react-native';
export default class App extends React.Component {
render() {
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',
},
});
I want to emulate this app on genymotion.