How to refresh the webview content (react-native app)? - android

I have a react-native app (expo managed) and in this app I need to open a couple of webviews ( that are hosted on my website url). The issue is that when I update the content on the website, react-native webview still has the old website's content.
For example, react-native opens a webview page with a title Library, I've updated the title to Libraries and deployed the changes to my website, when I open the website (though phone/desktop) I see the title Libraries, but when I open the same page as the webview from the react-native app the title is still Library. If I delete and reinstall the react-native app then I see Libraries, I can't seem to figure out what may cause this issue.
This is my code:
import React, {useRef, useEffect} from 'react';
import { WebView } from 'react-native-webview';
const webViewRef = useRef();
useEffect(() => {
webViewRef.current.reload();
}, []);
WebView
bounces={false}
ref={(ref) => (webViewRef.current = ref)}
source={{uri: "mywebsite"}}
/>
Any advise or help is greatly appreciated

I was able to fix this issue by passing a vavlue to the url,
import React, {useRef, useEffect, **useState**} from 'react';
import { WebView } from 'react-native-webview';
const webViewRef = useRef();
**const [value, setValue] = useState()**
useEffect(() => {
webViewRef.current.reload();
*setValue(Math.random)*
}, []);
WebView
bounces={false}
ref={(ref) => (webViewRef.current = ref)}
source={{uri: **`mywebsite?var=${value}`**}}
This allows webview url to refresh on page load

Related

React-Navigation added to existing apps

Some background for context...I'm creating a react-native app that will live in it's own repository. This app will be integrated into other web, iOS, and Android apps. I'm currently working with the Android app. This is an existing native app written in Java.
I've "wrapped" it with a super basic React Native app, following the React Native Docs. For testing purposes, to mimic what will end up being the production app, I have a native activity, MainActivity in the Android app, with a button that opens the second activity, ReactNativeActivity which is loads my React Native app. This is working - the React Native app loads. The React Native App has a button that should navigate to a second screen within the React Native app (using react-navigation). When I press that button, instead of navigating to the next screen in my stack, it instead reloads MainActivity from the native Android app. Running the same thing on web there is no issue with navigation, so I know the screens are hooked up right. I'm not new to React Native, but I am new to integrating with existing Native applications.
Edited to add some code as requested
The Navigator and the button are as follows:
// navigator.tsx
import React from "react";
import { NavigationContainer } from "#react-navigation/native";
import { createNativeStackNavigator } from "#react-navigation/native-stack";
import { HomeScreen } from "../screens/Home";
import Demo from "../screens/Demo";
export type NavigationStackParamList = {
HomeScreen: undefined;
Demo: undefined;
};
const Stack = createNativeStackNavigator<NavigationStackParamList>();
export const Navigation = () => {
return (
<NavigationContainer>
<Stack.Navigator>
<Stack.Screen component={Demo} name="Demo" />
<Stack.Screen
component={HomeScreen}
name="HomeScreen"
options={{ title: "Home" }}
/>
</Stack.Navigator>
</NavigationContainer>
);
};
// Demo Screen
const Demo: React.FC<DemoScreenProps> = ({ navigation }) => {
return (
<View style={styles.app}>
<View style={styles.info}>
<Text style={styles.title}>Demo</Text>
<Text>Running on: </Text>
<Text style={styles.platform}>{Platform.OS}</Text>
</View>
<Map />
<Button
onPress={() => navigation.navigate("HomeScreen")}
title="Go to Test Screen"
/>
</View>
);
};
Pressing "Go to Test Screen" above, is what is causing the MainActivity to reload, rather than the correct screen.

React-native WebView doesn't keep user logged in iOS devices

I've built a simple application that loads a page using Webview and, even though I've allowed cookies and cache, once the app is closed, the user is logged out from the website. PS.: This only happens in iOS devices, not in Android.
import React from 'react';
import WebView from 'react-native-webview';
import { useNavigation } from '#react-navigation/native';
const WebViewPage = () => {
const { navigate } = useNavigation();
return (
<WebView
source={{ uri: 'my-url' }}
onError={() => navigate('Error')}
thirdPartyCookiesEnabled
allowFileAccess
cacheEnabled
sharedCookiesEnabled
/>
);
};
export default WebViewPage;
I've found solutions for Flutter applications, but not for React-native.

WebView v-11.2.3 component from React Native v-0.63 not loading its content (using expo cli)

As the question says my Webview component wont load its content. I have no errors poping up or any problem in the conosle related to WebView. I am using expo.
On the other hand when using Iframe I have no problem loading the content running test on web browser but wont work when running test on mobile device. I have tried every solution proposed by others in here but nothing seems to work. I even tried using the iframe inside the WebView using html instead of uri, also nesting the WebView component into a View and giving it flex:1 but still nothing comes up on the screen but a small red dot up in the right corner.
As you can see all the test I've done with the commented code. The first (commented) function is using the Iframe component and the second (not commented) is only WebView.
My code looks like this:
import React from 'react';
import { StyleSheet, Text, Button, View, Dimensions } from 'react-native';
import Iframe from 'react-iframe';
import Header from './Header';
import ButtonMenu from './ButtonMenu';
import { WebView } from 'react-native-webview';
const deviceHeight = Dimensions.get('window').height;
const deviceWidth = Dimensions.get('window').width;
// export default function NatureQuestGps({navigation}) {
// return (
// <View style={styles.pageNatureQuest}>
// <View style={styles.headerContainer}>
// <Header/>
// <ButtonMenu color='#49AC72' onPress={()=> navigation.toggleDrawer()} />
// </View>
// <Iframe url="https://www.google.com/maps/d/embed?mid=11fEhEZiv72kKKy7XbbQ3GIufEcTpWUa2"
// width="400px"
// height="400px"
// display="initial"
// position="relative"/>
// </View>
// );
// }
export default function NatureQuestGps() {
return (
<View style={{ flex: 1, alignItems: 'flex-end' }}>
<WebView
source= {{ uri: 'https://www.google.com/maps/d/embed?mid=11fEhEZiv72kKKy7XbbQ3GIufEcTpWUa2'}}
style={styles.webview}
javaScriptEnabled={true}
domStorageEnabled={true}
startInLoadingState={false}
scalesPageToFit={true}
/>
</View>
);
}
const styles = StyleSheet.create({
pageNatureQuest:{
flex:1,
flexDirection:'column',
alignItems:'center',
},
headerContainer: {
width:'100%',
backgroundColor:'#ededed',
},
webview: {
flex: 1,
backgroundColor: 'yellow',
width: deviceWidth,
height: deviceHeight
}
});
Thanks in advance for anyone taking the time to help
I found the solution and it turns out that WebView component works when testing in mobile with EXPO but naver loaded in my browser, and the Iframe that worked in my browser but was not working in my mobile. Anyways the answer is that if you want a google maps trail or parcour to work for mobile and also web you will need a library to create your own maps routes and trails. But if you are only making a mobile app go for the WebView component although it possibly wont work in your computer browser for tests.

make browsers with react native

I have a mobile site and I want to make an android browser app where I want to open my site.
I have tried and react-native-browser. Something like..
import {
processColor, // make sure to add processColor to your imports if you want to use hex colors as shown below
} from 'react-native';
// at the top of your file near the other imports
var Browser = require('react-native-browser');
class SampleApp extends Component {
render() {
return (
<View style={{paddingTop:20, flex:1}}>
{Browser.open('https://google.com/')}
</View>
);
}
}
But got no success...
I just want to make a browser that opens my mobile site..
Is there any better way of doing this or if someone has any idea how to use react-native-browser ?
Thanks in advance
Looking at the source code, it seems this browser is only available on iOS.
you must search in this web https://js.coach/react-native?search=browser for example https://github.com/d-a-n/react-native-webbrowser
Why are you trying to look for an external library while there is a WebView Component already integrated with react-native itself?
WebView renders web content in a native view. You can use this
component to navigate back and forth in the web view's history and
configure various properties for the web content.
You can just add a WebView and open up the desired web url.
Example
import React, { Component } from 'react';
import { WebView } from 'react-native';
class MyWeb extends Component {
render() {
return (
<WebView
source={{uri: 'https://github.com/facebook/react-native'}}
style={{marginTop: 20}}
/>
);
}
}
You can use https://www.npmjs.com/package/react-native-webbrowser
Install:
npm i react-native-webbrowser --save
Use:
class SampleApp extends Component {
render() {
return (
<View style={{paddingTop:20, flex:1}}>
<Webbrowser
url="https://your-url.com"
hideHomeButton={true}
hideToolbar={true}
hideAddressBar={true}
hideStatusBar={true}
foregroundColor={'#efefef'}
backgroundColor={'#333'}
/>
</View>
);
}
Set all the hide's props to true to make your app display only the site

React Native WebView, how to store username and password

i am creating a very simple app for android and iphone/ipad that uses only webview.
How can i store username and password so the user would not have to type them in every single time. Thanks in advance.
import React, { Component } from 'react';
import {
AppRegistry,
WebView
} from 'react-native';
export default class myapp extends Component {
render() {
return (
<WebView
source={{uri: 'https://mysecretappurl.com'}}
/>
);
}
}
AppRegistry.registerComponent('myapp', () => myapp);
Thank you Fabian for a quick response.
I got it solved with injectedJavascript and the data persist even if i close and relaunch the app both on android and ios. I got stuck as at first as tried to go with asyncstorage and reactnativ-webview-bridge but i failed to implement them due to my lack of knowledge.
import React, { Component } from 'react';
import {
AppRegistry,
WebView
} from 'react-native';
export default class myapp extends Component {
render() {
let jsCode = `
var cookie={};
document.cookie.split('; ').forEach(function(i){cookie[i.split('=')[0]]=i.split('=')[1]});
document.querySelector('#email').value=cookie['email'] || '';
document.querySelector('#password').value=cookie['password'] || '';
document.querySelector('#login button').onclick = function(){
document.cookie = 'email='+document.querySelector('#email').value;
document.cookie = 'password='+document.querySelector('#password').value;
};
`;
return (
<WebView
source={{uri: 'https://mysecretappurl.com'}}
injectedJavaScript={jsCode}
/>
);
}
}
AppRegistry.registerComponent('myapp', () => myapp);
I don't know if I understand you correctly:
You are writing a "minified browser" with react native only to show your webpage and you want to prefill the login form on that page?
If it's true you are searching for a possibility to exchange data from your React Native app with your page in the WebView component. Take a look at this tutorial of react-native-webview-bridge .
I would try the following:
Communicate with your Webpage and establish a listener for your login form to pass the credentials to your RN app
Use a module like react-native-simple-store to store the credentials in your RN app
If you start the app the next time check your storage and if the credentials are not empty send them to your webpage via bridge/injected javascript

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