I'm building an instagram clone using React Native with Homescreen consisting of custom Header and Imagepost components,but it isn't showing up properly on android although it displays perfectly on web view(images below).
I only added the Text and the Test Button for testing purposes
HomeScreen.js:
import React, { useEffect, useState } from "react";
import { View, Text, TouchableOpacity, Button } from "react-native";
import axios from "axios";
import ImagePost from "../../components/ImagePost";
import Header from "../../components/Header";
import Ionicons from "react-native-vector-icons/Ionicons";
import useStore from "../../store";
const HomeScreen = ({ navigation }) => {
const [posts, setposts] = useState([]);
const [current, setcurrent] = useState(null);
const user = useStore((state) => state.currentUser);
const setcurrentUser = useStore((state) => state.setcurrentUser);
useEffect(() => {
axios.get("http://localhost:5000/posts").then((response) => {
console.log(response.data.posts);
setposts(response.data.posts);
});
}, []);
return (
<View>
<Header navigation={navigation} />
<Text>huidhoasodhiohdp</Text>
<Button title="test" />
{console.log("now user", user)}
{console.log("posts", posts)}
{posts &&
posts.map((post) => {
return (
<View key={post._id}>
<ImagePost post={post} navigation={navigation} />
{console.log("This post is", post)}
</View>
);
})}
</View>
);
};
export default HomeScreen;
Header.js:
import React from "react";
import { View, TouchableOpacity, Text } from "react-native";
import Ionicons from "react-native-vector-icons/Ionicons";
import useStore from "../store";
const Header = ({ navigation }) => {
console.log("header navigation", navigation);
const user = useStore((state) => state.currentUser);
return (
<View
style={{
flex: 1,
flexDirection: "row",
justifyContent: "space-between",
backgroundColor: "white",
}}
>
<TouchableOpacity
onPress={() => navigation.navigate("AddScreen")}
style={{ margin: "5%" }}
>
<Ionicons name="add-outline" size={25} color="black" />
</TouchableOpacity>
{user && <Text>{user.username}</Text>}
{user && console.log(user.username)}
<TouchableOpacity style={{ margin: "5%" }}>
<Ionicons name="chatbubble-ellipses-outline" size={25} color="black" />
</TouchableOpacity>
</View>
);
};
export default Header;
ImagePost.js :
import React from "react";
import { View, Text, Image, TouchableOpacity, Button } from "react-native";
import Ionicons from "react-native-vector-icons/Ionicons";
const ImagePost = ({ post, navigation }) => {
return (
<View>
<View style={{ flex: 1, flexDirection: "row", alignItems: "center" }}>
<Image
style={{
width: 50,
height: 50,
borderRadius: 50,
marginRight: "3%",
}}
source={post.creator.pic}
/>
<Text style={{ fontWeight: "bold" }}>User</Text>
</View>
<View style={{ width: "100%", height: 450 }}>
<Image
style={{ resizeMode: "cover", height: "100%" }}
source={post.file}
/>
<View style={{ flex: 1, flexDirection: "row", marginBottom: "6%" }}>
<TouchableOpacity style={{ marginRight: "1%" }}>
<Ionicons name="heart-outline" size={25} color="black" />
</TouchableOpacity>
<TouchableOpacity
style={{ marginRight: "1%" }}
onPress={() =>
navigation.navigate("CommentsScreen", { postId: post._id })
}
>
<Ionicons name="chatbubble-outline" size={25} color="black" />
</TouchableOpacity>
</View>
<Text>
<Text style={{ fontWeight: "bold", marginRight: "5%" }}>
{post.creator.userName}
</Text>
{post.description}
</Text>
</View>
</View>
);
};
export default ImagePost;
Android view
Web view
Related
I am relatively new to React-Native and mobile app development. I am trying to create a clone of Instagram. And in the post screen what I do is I have a button Camera and once I click on it, that should take me to CameraView screen. And in the CameraView screen I will take a picture using expo-camera and save the picture in a variable. So here, I want to export the picture and then import it in my Post screen, so that the user can have a preview of what the picture looks like before uploading. And another thing to note is that, the Post screen will by default have a Placeholder image and once the image is taken the placeholder image has to be replaced with the image.
I tried this code but it didnt work.
My Post screen :-
import { View, Text, Image, TextInput } from 'react-native';
import React, { useState, useEffect } from 'react'
import * as Yup from 'yup';
import { Formik } from 'formik'
import { Button, Divider } from 'react-native-elements';
import { useNavigation } from '#react-navigation/native';
import CameraView, { takePicture } from '../../screens/CameraView';
const PLACEHOLDER_IMG = require('../../assets/defImg.png')
const uploadPostSchema = Yup.object().shape({
caption: Yup.string().max(2200, 'Caption cannot exceed character limit.')
})
const FormikPostUploader = ({route}) => {
const [thumbnailUrl, setThumbnailUrl] = useState(PLACEHOLDER_IMG)
const navigation = useNavigation()
const handleCameraPress = () => {
UserImage = takePicture()
setThumbnailUrl(UserImage)
navigation.navigate('CameraView')
}
return (
<Formik
initialValues={{ imageUrl: '', caption:'' }}
onSubmit={(values) => console.log(values)}
validationSchema={uploadPostSchema}
validateOnMount={true}>
{({
handleBlur,
handleChange,
handleSubmit,
values,
errors,
isvalid
}) => (
<>
<View style={{ margin: 20, justifyContent: 'space-between', flexDirection: 'row' }}>
<Image source={thumbnailUrl} />
<View style={{ flex: 1, margin: 15 }}>
<TextInput
placeholder='Write a caption...'
placeholderTextColor='gray'
multiline={true}
style={{ color: 'white', fontSize: 17 }}
onChangeText={handleChange('caption')}
onBlur={handleBlur('caption')}
value={values.caption}
/>
</View>
</View>
<Divider width={0.5} orientation='vertical'/>
<View style={{ alignItems: 'center', marginTop: 15 }}>
<Text style={{ fontSize: 18, fontWeight: 'bold', color: 'white' }}>Choose Image</Text>
</View>
<View style={{ justifyContent: 'space-between', flexDirection: 'column', margin: 20 }}>
<View style={{ justifyContent: 'space-between', flexDirection: 'row', margin: 30 }}>
<Button title='Camera' onPress={handleCameraPress}/>
<Button title='Gallery' onPress={() => navigation.navigate('GalleryView')} />
</View>
<Button onPress={handleSubmit} title='Post' disabled={isvalid} />
</View>
</>
)}
</Formik>
)
}
export default FormikPostUploader
And my CameraView screen :-
import { View, Text, Image, StyleSheet, Button } from 'react-native'
import React, {useState, useEffect} from 'react'
import { Camera } from 'expo-camera'
import { TouchableOpacity } from 'react-native'
import { useNavigation } from '#react-navigation/native'
import { PLACEHOLDER_IMG } from '../components/newPost/FormikPostUploader'
export const takePicture = async(camera) => {
const data = await camera.takePictureAsync(null)
return data.uri
}
const Header = () =>{
const navigation = useNavigation()
return (
<View style = {styles.headerContainer}>
<TouchableOpacity style = {{marginBottom:15}} onPress={() => navigation.goBack()}>
<Image source = {require('../assets/back.png')} style = {{width:35, height:35, margin:20}}/>
</TouchableOpacity>
<Text style={{color:'white', fontWeight: '700', fontSize:20, marginRight: 25, marginTop:35, marginBottom:15}}>New Post</Text>
<Text> </Text>
</View>
)
}
const CameraView = () => {
const UserImage = takePicture()
const navigation = useNavigation()
const [hasCameraPermission, setHasCameraPermission] = useState(null)
const [thumbnailUrl, setThumbnailUrl] = useState(PLACEHOLDER_IMG)
const [camera, setCamera] = useState(null)
const [type, setType] = useState(Camera.Constants.Type.back)
const captureImage = async () => {
if (camera) {
const UserImage = await takePicture(camera)
setThumbnailUrl(UserImage)
}
}
useEffect(() => {
(async() => {
const cameraStatus = await Camera.requestCameraPermissionsAsync()
setHasCameraPermission(cameraStatus.status === 'granted')})()},
[])
if (hasCameraPermission === null) {
return <View/>
}
if (hasCameraPermission === false){
return <Text>Enable access for Camera to proceed</Text>
}
return (
<View style={{ flex: 1, backgroundColor: 'black'}}>
<Header/>
<Camera
ref = {ref => setCamera(ref)}
style={styles.fixedRatio}
type={type}
ratio={'1:1'}/>
<View style = {styles.cameraContainer}>
<TouchableOpacity onPress={() => {setType(type === Camera.Constants.Type.back ? Camera.Constants.Type.front : Camera.Constants.Type.back)}}>
<Image source={require('../assets/turn-camera.png')} style = {{width:70, height:70, margin: 15}}/>
</TouchableOpacity>
<TouchableOpacity onPress={() => {captureImage(), navigation.goBack(), console.log(UserImage)}}>
<Image source={require('../assets/camera-shutter.png')} style = {{width:70, height:70, marginRight:60}}/>
</TouchableOpacity>
</View>
</View>
)
}
const styles = StyleSheet.create({
cameraContainer: {
flex:0.15,
backgroundColor: 'black',
flexDirection:'row',
justifyContent: 'space-between',
alignItems: 'center',
},
fixedRatio: {
flex:0.99,
aspectRatio:0.9
},
headerContainer: {
flexDirection: 'row',
justifyContent: 'space-between',
alignItems: 'center',
backgroundColor:'black'
},
icon: {
width:25,
height: 25,
marginHorizontal:15,
marginTop:30,
},
iconContainer: {
flexDirection:'row',
justifyContent: 'space-between',
height:50,
},
}
)
export default CameraView
Am I doing anything wrong. Can you help me fix this. Thanks in advance!
I am very new to React Navigation and am trying to implement the following functionality in react-native:
I have a stack navigator as a parent and a bottom navigation bar as its child. From the home screen, when the user clicks the logout option, they should return to the Sign In screen which is a part of the parent navigation.
There are already a lot of questions regarding this, but I am not able to implement the previous solutions in my code.
Someone please help me out, the code is given below (This is an Expo managed project):
Navigation Components
import { NavigationContainer } from "#react-navigation/native";
import { createNativeStackNavigator } from "#react-navigation/native-stack";
import WelcomeScreen from "../screens/WelcomeScreen";
import Features from "../screens/Features";
import SignIn from "../screens/SignIn";
import Register from "../screens/Register";
import { createBottomTabNavigator } from "#react-navigation/bottom-tabs";
import { Icon } from "react-native-elements";
import Home from "../screens/Home";
import Reminders from "../screens/Reminders";
import Settings from "../screens/Settings";
const BottomNavbar = () => {
const Tab = createBottomTabNavigator();
return (
<Tab.Navigator
initialRouteName="Home"
screenOptions={({ route }) => ({
tabBarIcon: ({ focused }) => {
let iconName;
let rn = route.name;
if (rn === "Home") {
iconName = focused ? "home" : "home-outline";
} else if (rn === "Reminders") {
iconName = focused ? "list" : "list-outline";
} else if (rn === "Settings") {
iconName = focused ? "settings" : "settings-outline";
}
return (
<Icon
name={iconName}
size={25}
color="black"
type="ionicon"
/>
);
},
})}
showLabel
>
<Tab.Screen
name="Home"
component={Home}
options={{ headerShown: false }}
/>
<Tab.Screen
name="Reminders"
component={Reminders}
options={{ headerShown: false }}
/>
<Tab.Screen
name="Settings"
component={Settings}
options={{ headerShown: false }}
/>
</Tab.Navigator>
);
};
const Navigator = () => {
const Stack = createNativeStackNavigator();
return (
<NavigationContainer>
<Stack.Navigator
screenOptions={{ headerShown: false }}
initialRouteName="Welcome"
>
<Stack.Screen name="Welcome" component={WelcomeScreen} />
<Stack.Screen name="Features" component={Features} />
<Stack.Screen name="SignIn" component={SignIn} />
<Stack.Screen name="Register" component={Register} />
<Stack.Screen name="BottomNavbar" component={BottomNavbar} />
</Stack.Navigator>
</NavigationContainer>
);
};
export default Navigator;
Home Screen Components
import {
View,
Text,
SafeAreaView,
StyleSheet,
TouchableOpacity,
ScrollView,
} from "react-native";
import React from "react";
import { Header, Image, Icon } from "react-native-elements";
import { useFonts } from "expo-font";
import ServiceCard from "../components/ServiceCard";
import PetCard from "../components/PetCard";
const SignOut = ({ navigation }) => {
return (
<TouchableOpacity
onPress={() => {
navigation.navigate("SignIn");
}}
>
<Icon name="logout" color="black" size={20} />
</TouchableOpacity>
);
};
const Home = () => {
const [loaded, error] = useFonts({
Montserrat: require("../assets/fonts/Montserrat-Regular.ttf"),
});
if (!loaded) {
return null;
}
const url1 =
"https://images.unsplash.com/photo-1530281700549-e82e7bf110d6?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=388&q=80";
const url2 =
"https://images.unsplash.com/photo-1560807707-8cc77767d783?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=435&q=80";
const url3 =
"https://images.unsplash.com/photo-1543466835-00a7907e9de1?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=774&q=80";
return (
<View style={styles.screen}>
<Header
leftComponent={{
icon: "menu",
color: "black",
}}
rightComponent={<SignOut />}
centerComponent={{
text: "PetPapa",
color: "black",
style: {
fontFamily: "Montserrat",
fontSize: 20,
},
}}
barStyle="dark-content"
backgroundColor="white"
containerStyle={styles.header}
/>
<View style={styles.community}>
<View style={styles.commOffer}>
<View>
<Text style={styles.commOfferTitle}>Join our</Text>
<Text style={styles.commOfferTitle}>
community today!
</Text>
</View>
<TouchableOpacity style={styles.btn}>
<Text style={styles.commOfferJoin}>Join Now</Text>
</TouchableOpacity>
</View>
<Image
source={{
uri: "https://imgur.com/nB4Xm1Z.png",
}}
style={styles.commDog}
/>
</View>
<View style={styles.listView}>
<View style={styles.topText}>
<Text style={styles.title}>Services</Text>
<TouchableOpacity>
<Text style={styles.option}>See more</Text>
</TouchableOpacity>
</View>
<ServiceCard />
</View>
<View style={styles.listView}>
<View style={styles.topText}>
<Text style={styles.title}>My Pets</Text>
<TouchableOpacity>
<Text style={styles.option}>See all</Text>
</TouchableOpacity>
</View>
<ScrollView
style={styles.petView}
horizontal={true}
showsHorizontalScrollIndicator={true}
persistentScrollbar={true}
>
<PetCard name="Miles" Img={url1} />
<PetCard name="Jack" Img={url2} />
<PetCard name="Ellie" Img={url3} />
</ScrollView>
</View>
</View>
);
};
const styles = StyleSheet.create({
screen: {
height: "100%",
backgroundColor: "white",
alignItems: "center",
},
header: {
backgroundColor: "white",
height: 80,
},
community: {
backgroundColor: "#1976D2",
height: "15%",
width: "80%",
borderRadius: 20,
marginTop: 50,
flexDirection: "row",
justifyContent: "space-around",
},
commDog: {
marginTop: 10,
marginRight: 15,
height: 105,
width: 75,
},
commOffer: {
marginTop: 10,
flexDirection: "column",
justifyContent: "space-around",
},
commOfferTitle: {
color: "white",
fontFamily: "Montserrat",
fontSize: 16,
},
btn: {
backgroundColor: "#FFC107",
width: "50%",
borderRadius: 10,
},
commOfferJoin: {
color: "white",
margin: 5,
},
listView: {
marginTop: 50,
width: "80%",
},
topText: {
flexDirection: "row",
justifyContent: "space-between",
alignItems: "center",
},
title: {
fontFamily: "Montserrat",
fontWeight: "600",
},
option: {
fontFamily: "Montserrat",
opacity: 0.4,
},
block: {
backgroundColor: "#FF5677",
width: 75,
height: 100,
justifyContent: "center",
alignItems: "center",
marginTop: 25,
borderRadius: 20,
},
petView: {
width: "100%",
backgroundColor: "white",
height: 250,
},
});
export default Home;
My Directory Structure:
First you need to add navigation prop to Home screen component
const Home = ({navigation}) => {
const [loaded, error] = useFonts({
Montserrat: require("../assets/fonts/Montserrat-Regular.ttf"),
});
...
then You need to pass navigation prop to the signout component
<Header
leftComponent={{
icon: "menu",
color: "black",
}}
rightComponent={<SignOut navigation={navigation} />}
...
You can also use useNavigation hook from react navigation
import { useNavigation } from '#react-navigation/native';
const SignOut = ({}) => {
const navigation = useNavigation()
return (
<TouchableOpacity
onPress={() => {
navigation.navigate("SignIn");
}}
>
<Icon name="logout" color="black" size={20} />
</TouchableOpacity>
);
};
If You want to create login flow then you should use Authentication flow which I think best prectice and recommended way
The problem in current flow if you logout and navigate to sign-in page once then if you navigate back from you app then as behaviour of stack navigation it just pop current screen and it will again navigate to home screen which is not what supposed to be correct.
You can learn it from react-navigation offical doc
https://reactnavigation.org/docs/auth-flow/
if you want a video tutorial how to implement Authentication flow using redux(state management lib) then I have video tutorial you can learn this video -> https://youtu.be/cm1oJ7JmW6c
I am not using classes or functions as a native component, I am using const with props as a parameter.
In my project I am using Firestore as database and I want to pass data from one screen to another and I don't know how, can someone give me some tips ?
My other problem is in the firestore query because I need to put .doc(firebase.auth().currentUser) and when I test my application an error occurs in the application.
BreadAndBounty.js
import React, { useState, useEffect } from "react";
import { View, Text, TextInput, StyleSheet, Image, ScrollView, TouchableOpacity, StatusBar, SafeAreaView, FlatList, Dimensions, ImageBackground } from 'react-native'
import { Ionicons } from '#expo/vector-icons'
import Constants from 'expo-constants'
import firebase, { firestore } from 'firebase'
require('firebase/firestore')
const { width, height } = Dimensions.get("window");
const BreadAndBounty = (props) => {
const [adverts, setAdverts] = useState([])
const getAdverts = async () => {
const querySnap = await firestore()
.collection('adverts')
.get()
const result = querySnap.docs.map(docSnap => docSnap.data())
setAdverts(result)
}
useEffect(() => {
getAdverts()
}, [])
const renderItem = (item) => {
return (
<View>
<View style={{
flexDirection: "row",
paddingTop: 50,
alignItems: "center"
}}>
<View style={{ width: "20%" }}>
</View>
<View style={{
width: "60%"
}}>
<Text style={{
fontWeight: "bold",
fontSize: 14,
color: "#044244"
}}>{item.title}</Text>
<Text style={{
fontWeight: "900",
fontSize: 12,
color: "#9ca1a2"
}}>
{item.name}
</Text>
</View>
<View style={{
width: "20%",
alignItems: "flex-end"
}}>
</View>
</View>
<TouchableOpacity
onPress={() => props.navigation.navigate(("AdvertsDetail"), { uid: firebase.auth().currentUser })}
style={{
flexDirection: "row",
width: "100%",
paddingTop: 20
}}>
<ImageBackground
source={item.image}
style={{
width: 300,
height: 220,
borderRadius: 30,
}}
imageStyle={{
borderRadius: 30,
}}
>
<View style={{
height: "100%",
flexDirection: "row",
alignItems: 'flex-end',
justifyContent: "flex-end"
}}>
</View>
</ImageBackground>
</TouchableOpacity>
</View>
)
}
return (
<ScrollView showsVerticalScrollIndicator={false}
style={{
height: "100%",
backgroundColor: "#62929E"
}}>
<View style={styles.view1}>
<View style={styles.view2}>
<View>
</View>
<View style={styles.view3}>
</View>
</View>
<Text style={styles.text1}>Bread And Bounty</Text>
<View style={styles.view_search}>
<TextInput
placeholder="Pesquisar anúncios de voluntariado..."
style={styles.textinput}>
</TextInput>
<Ionicons
name="search"
size={15}
color="#9CALA2"
></Ionicons>
</View>
</View>
<View style={styles.view4}>
<View style={{ width: "100%" }}>
<FlatList
numColumns={1}
horizontal={false}
showsVerticalScrollIndicator={false}
style={{
display: "flex",
height: Dimensions.get("screen").height,
width: Dimensions.get("screen").width
}}
data={adverts}
renderItem={({ item }) => renderItem(item)} />
</View>
</View>
</ScrollView>
)
}
export default BreadAndBounty
AdvertsDetail
import React, { useState } from 'react'
import { View, StyleSheet, Text,TouchableOpacity } from 'react-native'
import Constants from 'expo-constants';
import { Ionicons } from "#expo/vector-icons"
const AdvertsDetail = (props) => {
const [currentUser, Adverts] = useState([])
return (
<View style={styles.container}>
<View style={styles.header}>
<TouchableOpacity onPress={() => props.navigation.goBack()}>
<Ionicons name="md-arrow-back" size={24} color="#52575D"></Ionicons>
</TouchableOpacity>
</View>
<Text>{currentUser.title}</Text>
</View>
)
}
export default AdvertsDetail
We can simply access the params from the previous screen in the new screen by accessing the props of the current screen.
ex.
import React, { useState } from 'react'
import { View, StyleSheet, Text,TouchableOpacity } from 'react-native'
import Constants from 'expo-constants';
import { Ionicons } from "#expo/vector-icons"
const AdvertsDetail = (props) => {
const currentUser = props.route.params.uid
return (
<View style={styles.container}>
<View style={styles.header}>
<TouchableOpacity onPress={() => props.navigation.goBack()}>
<Ionicons name="md-arrow-back" size={24} color="#52575D"></Ionicons>
</TouchableOpacity>
</View>
<Text>{currentUser.title}</Text>
</View>
)
}
export default AdvertsDetail
Check out the official docs from react-navigation for passing the params to the screen and accessing it.
https://reactnavigation.org/docs/params/
I have Created Project with expo-camera which on click of button opens camera. However first time when i click that button only black screen is render, after reopening the screen, and clicking the same button, the Camera UI is render on Screen.
Problem
I don't know why it show black screen first. The Problem only exist in android devices.
Link to Expo Snack Try this example on android devices.
import React, { useState, useEffect, useContext } from 'react';
import {
SafeAreaView,
View,
Text,
Dimensions,
ImageBackground,
Image,
Alert,
} from 'react-native';
import { Camera } from 'expo-camera';
import { Entypo, Ionicons, FontAwesome } from '#expo/vector-icons';
import { Surface, Button, TextInput } from 'react-native-paper';
const { width, height } = Dimensions.get('window');
let cameraRef;
const PickImage = ({ navigation }) => {
const [hasPermission, setHasPermission] = useState(null);
const [type, setType] = useState(Camera.Constants.Type.back);
const [isCameraUiOn, setIsCameraUiOn] = useState(false);
const [isCapturing, setIsCapturing] = useState(false);
const [flashMode, setFlashMode] = useState(true);
const [capturePhoto, setCapturePhoto] = useState(null);
const snap = async () => {
if (cameraRef) {
let photo = await cameraRef.takePictureAsync({
quality: 0.5,
});
setCapturePhoto(photo.uri);
setIsCapturing(false);
setIsCameraUiOn(false);
}
};
const getCameraPermission = async () => {
const { status } = await Camera.requestPermissionsAsync();
setHasPermission(status === 'granted');
};
useEffect(() => {
getCameraPermission();
}, []);
if (hasPermission === null) {
return <View />;
}
if (hasPermission === false) {
return <Text>No access to camera</Text>;
}
if (isCameraUiOn) {
return (
<SafeAreaView style={{ flex: 1 }}>
<View style={{ flex: 1 }}>
<Camera
style={{ flex: 1 }}
type={type}
ref={(ref) => (cameraRef = ref)}
flashMode={
flashMode
? Camera.Constants.FlashMode.on
: Camera.Constants.FlashMode.off
}>
<Entypo
name="cross"
color="#FFF"
size={50}
onPress={() => setIsCameraUiOn(false)}
/>
<View
style={{
flex: 1,
backgroundColor: 'transparent',
display: 'flex',
justifyContent: 'space-evenly',
alignItems: 'flex-end',
flexDirection: 'row',
zIndex: 9999,
}}>
<Ionicons
name="md-reverse-camera"
color="#FFF"
size={35}
onPress={() => {
setType(
type === Camera.Constants.Type.back
? Camera.Constants.Type.front
: Camera.Constants.Type.back
);
}}
/>
{isCapturing ? (
<FontAwesome name="circle" color="#FFF" size={60} />
) : (
<FontAwesome
name="circle-o"
color="#FFF"
size={60}
onPress={() => {
setIsCapturing(true);
snap();
}}
/>
)}
<Ionicons
name="ios-flash"
color={flashMode ? 'gold' : '#FFF'}
size={35}
onPress={() => setFlashMode(!flashMode)}
/>
</View>
</Camera>
</View>
</SafeAreaView>
);
} else {
return (
<SafeAreaView style={{ flex: 1 }}>
<View style={{ margin: 20 }}>
<Text
style={{
fontSize: 25,
fontWeight: '600',
}}>
Report Cattles with Ease !!
</Text>
<Text
style={{
marginVertical: 10,
}}>
Our System uses, cloud based fancy image detection algorithm to
process your image.
</Text>
</View>
<View
style={{
display: 'flex',
justifyContent: 'center',
alignItems: 'center',
}}>
<Button
style={{
width: width * 0.5,
}}
icon="camera"
mode="contained"
onPress={() => setIsCameraUiOn(true)}>
Press me
</Button>
</View>
</SafeAreaView>
);
}
};
export default PickImage;
Link to snack Expo
im with the same problem rn, some people suggested asking for permission before rendering
I'm making a mobile app and then suddenly when I enter this Screen the whole app crashes. It was working before but, after I changed some style, it gave me some errors about too much Call Stack but stopped saying that and just crashes. I really don't know what's causing this. I tried to see if there was on the UseEffect() I think there is nothing there causing this.
import React, { useEffect, useState, useContext} from "react";
import {
View,
Text,
StatusBar,
TouchableOpacity,
ScrollView,
AsyncStorage,
Dimensions,
Image,
Alert,
} from "react-native";
import PlusImage from "../../../../assets/add_circle-24px.png";
import mainContext from "../../../services/contexts/mainContext";
import listContext from "../../../services/contexts/listContext";
import taskContext from "../../../services/contexts/taskContext";
import { MaterialIcons } from "#expo/vector-icons";
import styles from "./styles";
import TaskItem from "../../utils/TaskItem";
import Animated from "react-native-reanimated";
import { FlatList } from "react-native-gesture-handler";
export default function List({ route, navigation }) {
const {
clean,
getTasksList,
edited,
toogleEdited,
deleteList,
doneTasks,
todoTasks,
} = useContext(listContext);
const { taskEdited, idtask, deleteTask } = useContext(taskContext);
const [listName, setListName] = useState("");
const [screenTasks, setScreenTasks] = useState([{}]);
const [done, setDone] = useState(false);
const screenHeight = Math.round(Dimensions.get("window").height);
async function getListName() {
setListName(await AsyncStorage.getItem("listName"));
}
async function asyncGetTasks() {
await getTasksList();
}
useEffect(() => {
if (listName) getListName();
asyncGetTasks();
setScreenTasks(done ? doneTasks : todoTasks);
if (idtask) {
navigation.navigate("Task");
}
}, [edited, taskEdited, idtask, done]);
return (
<View style={styles.container}>
<StatusBar hidden />
<View style={styles.buttonsContainer}>
<TouchableOpacity
onPress={() => {
navigation.goBack();
clean();
}}
>
<MaterialIcons name="arrow-back" size={32} />
</TouchableOpacity>
<TouchableOpacity
onPress={() => {
Alert.alert(
"Are you sure you want to delete this list?",
"",
[
{
text: "Cancel",
style: "cancel",
},
{
text: "OK",
onPress: () => {
deleteList();
clean();
navigation.goBack();
},
},
],
{ cancelable: true }
);
}}
>
<MaterialIcons name="delete" size={32} color="#bc0000" />
</TouchableOpacity>
</View>
<View style={styles.titleContent}>
<Text style={styles.titleText}>{listName}</Text>
</View>
<View style={styles.midButtonsContainer}>
<View
style={{
opacity: 1,
backgroundColor: done ? null : "#dddddd",
borderRadius: 7,
padding: 8,
opacity: 1,
}}
>
<TouchableOpacity
onPress={() => {
setDone(false);
toogleEdited();
}}
>
<Text>To do</Text>
</TouchableOpacity>
</View>
<View
style={{
opacity: 1,
backgroundColor: done ? "#dddddd" : null,
borderRadius: 7,
padding: 8,
opacity: 1,
}}
>
<TouchableOpacity
onPress={() => {
setDone(true);
toogleEdited();
}}
>
<Text style={styles.doneButton}>Done</Text>
</TouchableOpacity>
</View>
</View>
{screenTasks.length > 0 ? (
<FlatList
data={screenTasks}
renderItem={(item, index) => {
return (
<TaskItem
OnSwipeRight={() => deleteTask(item.item._id)}
{...{ item }}
/>
);
}}
/>
) : (
<View style={styles.emptyContent}>
<Text style={styles.emptyText}>This list don't have tasks yet</Text>
</View>
)}
<TouchableOpacity
style={{
position: "absolute",
top: screenHeight - 120,
right: 28,
flexDirection: "row",
width: 50,
alignSelf: "flex-end",
}}
onPress={() => {
navigation.navigate("NewTask");
}}
>
<Image source={PlusImage} />
</TouchableOpacity>
</View>
);
}
Have you tried to import it from the react lib?
import React, { useEffect } from 'react';
I don't see it in your import above.