Related
Below you can find the code created so far. You might see that this code works for a simple web program. But when you attempt to see how it is displayed on MOBILE this error code occurs -> (undefined is not an object (evaluating 'p.Picker.Item')
(Device))
Would anyone possibly have an idea of the reason for this error?
I'm new to REACT NATIVE.
import React, { useState } from 'react';
import {
View,
StyleSheet,
Text,
Animated,
Easing,
Pressable,
TextInput,
} from 'react-native';
import { LinearGradient } from 'expo-linear-gradient';
import Constants from 'expo-constants';
import {Card} from 'react-native-paper';
import NumberPlease from 'react-native-number-please';
import { useHeaderHeight } from '#react-navigation/elements';
const OrderPizza = () => {
const initialValues = [{ id: "pizza", value: 3 }];
const [pizzas, setPizzas] = useState(initialValues);
const pizzaNumbers = [{ id: "pizza", label: "🍕", min: 0, max: 99 }];
return (
<View>
<Text>I would like</Text>
<NumberPlease
digits={pizzaNumbers}
values={pizzas}
onChange={(values) => setPizzas(values)}
/>
</View>
);
};
export default function DosingCalculator({ navigation }) {
const headerHeight = useHeaderHeight();
const topMargin = headerHeight + 'px 0 0 0';
const animatedValue = React.useRef(new Animated.Value(0)).current;
const startAnimation = (toValue) => {
Animated.timing(animatedValue, {
toValue,
duration: 400,
easing: Easing.linear,
useNativeDriver: false,
}).start();
};
const left = animatedValue.interpolate({
inputRange: [0, 1],
outputRange: ['2%', '50%'],
extrapolate: 'clamp',
});
const scale = animatedValue.interpolate({
inputRange: [0, 0.5, 1],
outputRange: [1, 0.9, 1],
extrapolate: 'clamp',
});
return (
<LinearGradient colors={['#20c1c1', '#8dc642']} style={styles.gradient}>
<View style={styles.mainContainer}>
<View style={styles.container}>
<Text>
Secondary Readings
<View style={styles.sliderContainer}>
<Animated.View style={[styles.slider, { left }]} />
<Pressable
style={styles.clickableArea}
onPress={startAnimation.bind(null, 0)}>
<Animated.Text
style={[styles.sliderText, { transform: [{ scale }] }]}>
Show
</Animated.Text>
</Pressable>
<Pressable
style={styles.clickableArea}
onPress={startAnimation.bind(null, 1)}>
<Animated.Text
style={[styles.sliderText, { transform: [{ scale }] }]}>
Hide
</Animated.Text>
</Pressable>
</View>
</Text>
<View
style={{
flex: 1,
alignContent: 'center',
justifyContent: 'center',
padding: 12,
}}>
<Text>Pool Volume</Text>
<TextInput
style={{
borderRadius: 10,
padding: 8,
backgroundColor: '#f5f5f5',
}}
onChangeText={(text) => setGallons(text)}
/>
</View>
</View>
<View style={styles.container}>
<Text>Current</Text>
<OrderPizza/>
</View>
<View style={styles.container}>
<Text>Desired</Text>
</View>
</View>
</LinearGradient>
);
}
const styles = StyleSheet.create({
container: {
width: '100%',
alignItems: 'center',
justifyContent: 'center',
textAlign: 'center',
margin: 30,
flexDirection: 'row',
},
gradient: {
flex: 1,
paddingLeft: 15,
paddingRight: 15,
},
sliderContainer: {
width: '75%',
height: 50,
borderRadius: 10,
flexDirection: 'row',
justifyContent: 'space-between',
alignItems: 'center',
backgroundColor: '#e0e0e0',
},
mainContainer: {
width: '100%',
margin: 8,
borderRadius: 10,
alignItems: 'center',
backgroundColor: 'white',
},
clickableArea: {
width: '50%',
height: '100%',
justifyContent: 'center',
alignItems: 'center',
},
sliderText: {
fontSize: 17,
fontWeight: '500',
},
slider: {
position: 'absolute',
width: '48%',
height: '90%',
borderRadius: 10,
backgroundColor: '#20c1c1',
},
});
I cannot click the 1st and 2nd item because there is text input behind it and 3rd and 4th item because of the button behind it. 5th item is clickable. I tried using zindex but it does not work. I am using react-native-autocomplete-input library.
It works fine in iOS but not in Android
This is my code
import Autocomplete from 'react-native-autocomplete-input';
import {
GestureHandlerRootView,
TouchableOpacity as Touchable,
} from 'react-native-gesture-handler';
<View style={[styles.inputContainer, globalStyles.zIndex1]}>
<Text style={styles.inputLabel}>{getSupplierLabel()}</Text>
<Autocomplete
editable={true}
autoCorrect={false}
data={filteredParties}
onChangeText={(text: string) => {
//some code
}}
value={party}
flatListProps={{
keyboardShouldPersistTaps: 'always',
keyExtractor: (party: any) => party.id,
renderItem: ({item: {name}}: any) => (
<Touchable
style={[globalStyles.margin10, globalStyles.zIndex1]}
onPress={() => {
setFilteredParties([]);
setParty(name);
}}>
<Text textColor={color.gray}>{name}</Text>
</Touchable>
),
}}
inputContainerStyle={globalStyles.borderWidth0}
listContainerStyle={styles.autocompleteListContainerStyle}
containerStyle={styles.textInput}
/>
const styles = StyleSheet.create({
inputContainer: {
flexDirection: 'row',
alignItems: 'center',
marginTop: 10,
},
textInput: {
flex: 2,
borderWidth: 1,
borderColor: color.gray,
borderRadius: 2,
marginLeft: 5,
},
autocompleteListContainerStyle: {
left: 0,
position: 'absolute',
right: 0,
top: 41,
zIndex: 1,
},
});
Wrap your AutoComplete component with a view and give it a suitable zIndex :
import Autocomplete from 'react-native-autocomplete-input';
import {
GestureHandlerRootView,
TouchableOpacity as Touchable,
} from 'react-native-gesture-handler';
<View style={[styles.inputContainer, globalStyles.zIndex1]}>
<Text style={styles.inputLabel}>{getSupplierLabel()}</Text>
<View style={ zIndex: 2 }>
<Autocomplete
editable={true}
autoCorrect={false}
data={filteredParties}
onChangeText={(text: string) => {
//some code
}}
value={party}
flatListProps={{
keyboardShouldPersistTaps: 'always',
keyExtractor: (party: any) => party.id,
renderItem: ({item: {name}}: any) => (
<Touchable
style={[globalStyles.margin10, globalStyles.zIndex1]}
onPress={() => {
setFilteredParties([]);
setParty(name);
}}>
<Text textColor={color.gray}>{name}</Text>
</Touchable>
),
}}
inputContainerStyle={globalStyles.borderWidth0}
listContainerStyle={styles.autocompleteListContainerStyle}
containerStyle={styles.textInput}
/>
</View>
const styles = StyleSheet.create({
inputContainer: {
flexDirection: 'row',
alignItems: 'center',
marginTop: 10,
},
textInput: {
flex: 2,
borderWidth: 1,
borderColor: color.gray,
borderRadius: 2,
marginLeft: 5,
},
autocompleteListContainerStyle: {
left: 0,
position: 'absolute',
right: 0,
top: 41,
zIndex: 1,
},
});
this is my profile page I want scroll animation but I didn't get output
** there is two-part one is header and body part is fully based on card view **
import React, { useRef } from 'react';
import {
StyleSheet,
Text,
View,
Image,
Animated,ScrollView
} from 'react-native';
import { TouchableOpacity } from 'react-native-gesture-handler';
import {Card, Title, Paragraph } from 'react-native-paper';
import { MaterialCommunityIcons } from '#expo/vector-icons';
import { SafeAreaProvider } from 'react-native-safe-area-context';
import SafeAreaView from 'react-native-safe-area-view';
import AnimatedHeader from 'C:\Users\keerthana\Desktop\mobile-client-1\src\components\AnimatedHeader.js';
const SettingsScreen=()=>{
const offset = useRef(new Animated.Value(0)).current;
return ( <SafeAreaProvider>
<SafeAreaView style={{ flex: 1 }} forceInset={{ top: 'always' }}>
<AnimatedHeader animatedValue={offset} />
<ScrollView
style={{ flex: 1, backgroundColor: 'white' }}
contentContainerStyle={{
alignItems: 'center',
paddingTop: 220,
paddingHorizontal: 20
}}
showsVerticalScrollIndicator={false}
scrollEventThrottle={16}
onScroll={Animated.event(
[{ nativeEvent: { contentOffset: { y: offset } } }],
{ useNativeDriver: false }
)}
>
<View style={styles.header}>
<View style={styles.headerContent}>
<Image style={styles.avatar} source={{uri: 'https://bootdey.com/img/Content/avatar/avatar2.png'}}/>
<Text style={styles.name}>
Name
</Text>
</View>
<View style={{ backgroundColor: "#FFF"}}>
<Card style={{padding:5,borderWidth: 1,borderRadius: 1,borderColor: '#adacac',marginTop:20}}>
<Card.Title title="INFO" subtitle="username" />
<Card.Content>
<Title style={{fontSize:16}}>Phone Number</Title>
<Paragraph>0000000000000</Paragraph>
</Card.Content>
<Card.Content style={{borderWidth: 0, borderColor: 'transparent', elevation: 0}}>
<Title style={{fontSize:16}}>Slogan</Title>
<Paragraph >Testing leads to failure, and failure leads to understanding</Paragraph>
</Card.Content>
</Card>
<Card style={{padding:5,borderWidth: 1,borderRadius: 1,borderColor: '#adacac',marginTop:10}}>
<Card.Title title="Groups" />
</Card>
<View style={{padding:5,borderWidth: 1,borderRadius: 1,borderColor: '#adacac',marginTop:10}}>
//group
<TouchableOpacity>
<View style={{flex: 1,justifyContent: 'center',marginLeft:20}}>
<Image
width={450}
containerStyle={{flex: 0.37}}
imageProps={{resizeMode:'cover'}}
source={{uri: 'https://bootdey.com/img/Content/avatar/avatar2.png'}}
activeOpacity={0.7}
/>
</View>
<View style={{flex: 11,flexDirection: 'column',justifyContent: 'center'}}>
<View style={{ flexDirection: 'row',justifyContent: 'flex-start', marginLeft: 9 }}>
<Text >music game</Text>
</View></View>
</TouchableOpacity>
<TouchableOpacity>
<Text>ludo game</Text>
</TouchableOpacity>
<TouchableOpacity>
<Text> game</Text>
</TouchableOpacity>
</View>
</View>
</View>
</ScrollView>
</SafeAreaView>
</SafeAreaProvider>
);
};
export default SettingsScreen;
const styles=StyleSheet.create({
header:{
backgroundColor: "#e6e3e3",
},
headerContent:{
padding:30,
alignItems: 'center',
},
avatar: {
width: 130,
height: 130,
borderRadius: 63,
borderWidth: 4,
borderColor: "white",
marginBottom:10,
},
name:{
fontSize:22,
color:"#FFFFFF",
fontWeight:'600',
},
profileDetail:{
alignSelf: 'center',
marginTop:200,
alignItems: 'center',
flexDirection: 'row',
position:'absolute',
backgroundColor: "#ffffff"
},
detailContent:{
margin:10,
alignItems: 'center'
},
title:{
fontSize:20,
color: "#00CED1"
},
count:{
fontSize:18,
},
bodyContent: {
flex: 1,
alignItems: 'center',
padding:30,
marginTop:40
},
textInfo:{
fontSize:18,
marginTop:20,
color: "#696969",
},
buttonContainer: {
marginTop:10,
height:45,
flexDirection: 'row',
justifyContent: 'center',
alignItems: 'center',
marginBottom:20,
width:250,
borderRadius:30,
backgroundColor: "#00CED1",
},
description:{
fontSize:20,
color: "#00CED1",
marginTop:10,
textAlign: 'center'
},
});
animation page
** this animation is used for profile page scroll **
import React from 'react';
import {
Animated,
TouchableOpacity,
View,
Text,
StyleSheet
} from 'react-native';
import { useSafeAreaInsets } from 'react-native-safe-area-context';
const HEADER_HEIGHT = 200;
const AnimatedHeader = ({ animatedValue }) => {
const insets = useSafeAreaInsets();
const headerHeight = animatedValue.interpolate({
inputRange: [0, HEADER_HEIGHT + insets.top],
outputRange: [HEADER_HEIGHT + insets.top, insets.top + 44],
extrapolate: 'clamp'
});
return (
<Animated.View
style={{
position: 'absolute',
top: 0,
left: 0,
right: 0,
zIndex: 10,
height: headerHeight,
backgroundColor: 'lightblue'
}}
/>
);
};
export default AnimatedHeader;
without using the animation part its works properly but after adding animation I don't know why it's not working.
I am trying to detect face with react-native-camera, I want to know how can we detect an individual's face, there is no proper documentation about the mlkit.
await FaceDetector.detectFacesAsync(data.uri) this statement is just returning face object like this face[0] = { bounds: { origin: { x: 739, y: 987 }, size: { x: 806, y: 789 } }, faceID: 0, rollAngle: 10.533509254455566, yawAngle: 0.7682874798774719 }.
This is just object's position, I cannot figure out how to recognize individual's face characteristics like eys, nose with the FaceDetector and suppose I will save person A's face data then how I will match the data with A's face later with react-native-camera ?
ML Kit does not support Face Recognition. Also, React Native is not officially supported (yet), but you could check out https://rnfirebase.io/ml-vision/face-detection#process which outlines how you can get a 133-point contour of the face. However, this is not meant for facial recognition, but rather for overlays (e.g. masks, filters).
import SplashScreen from 'react-native-splash-screen'
import React, { useEffect, createRef,useState } from 'react';
import { SafeAreaView, View, Image, StyleSheet, Text, Modal, TouchableOpacity } from 'react-native';
import { RNCamera } from 'react-native-camera';
const Test = (props) => {
useEffect(() => {
SplashScreen.hide();
});
const [faces, setFace] = useState([]);
const [faceavl, setFaceavl] = useState(false);
const [takeTimeFaceAvl, setTakeTimeFaceAvl] = useState(false);
const [searchWaiting, setsearchWaiting] = useState(null)
const [modalVisible, setModalVisible] = useState(false);
const [image, setImage] = useState(null);
const mycamera = createRef()
const PendingView = () => (
<View
style={{
flex: 1,
backgroundColor: 'lightgreen',
justifyContent: 'center',
alignItems: 'center',
}}
>
<Text>Waiting</Text>
</View>
);
const renderFaces = () => (
<View style={{
position: 'absolute',
bottom: 0,
right: 0,
left: 0,
top: 0,
}} pointerEvents="none">
{faces.map(renderFace)}
</View>
);
const renderFace = ({ bounds, faceID, rollAngle, yawAngle }) => (
<View
key={faceID}
transform={[
{ perspective: 600 },
{ rotateZ: `${rollAngle.toFixed(0)}deg` },
{ rotateY: `${yawAngle.toFixed(0)}deg` },
]}
style={[
{
padding: 10,
borderWidth: 1,
borderRadius: 2,
position: 'absolute',
borderColor: '#000',
justifyContent: 'center',
},
{
...bounds.size,
left: bounds.origin.x,
top: bounds.origin.y,
},
]}
>
</View>
);
return (
<>
<SafeAreaView style={styles.container}>
<RNCamera
ref={mycamera}
style={styles.preview}
type={RNCamera.Constants.Type.front}
flashMode={RNCamera.Constants.FlashMode.on}
androidCameraPermissionOptions={{
title: 'Permission to use camera',
message: 'We need your permission to use your camera',
buttonPositive: 'Ok',
buttonNegative: 'Cancel',
}}
androidRecordAudioPermissionOptions={{
title: 'Permission to use audio recording',
message: 'We need your permission to use your audio',
buttonPositive: 'Ok',
buttonNegative: 'Cancel',
}}
onFacesDetected={(data) => {
setFace(data.faces)
setFaceavl(true);
clearTimeout(searchWaiting)
const avc = setTimeout(() => {
console.log()
setFaceavl(false);
setFace([])
}, 500)
setsearchWaiting(avc)
}}
onFaceDetectionError={(error) => {
console.log('face--detact-->', error)
}}
>
{({ camera, status, recordAudioPermissionStatus }) => {
if (status !== 'READY') return <PendingView />;
return (
<View style={{ flex: 0, flexDirection: 'row', justifyContent: 'center' }}>
<TouchableOpacity onPress={async () => {
const options = { quality: 0.5, base64: true };
const data = await camera.takePictureAsync(options)
if (faceavl) {
setTakeTimeFaceAvl(true)
} else {
setTakeTimeFaceAvl(false)
}
console.log(data.uri)
setImage(data)
setModalVisible(!modalVisible)
}} style={styles.capture}>
<Text style={{ fontSize: 14 }}> SNAP </Text>
</TouchableOpacity>
</View>
);
}}
</RNCamera>
{faces ? renderFaces() : null}
</SafeAreaView>
<Modal
animationType="slide"
transparent={true}
visible={modalVisible}
onRequestClose={() => {
Alert.alert("Modal has been closed.");
setModalVisible(!modalVisible);
}}
>
<View style={styles.centeredView}>
<View style={styles.modalView}>
{takeTimeFaceAvl ? image ? <Image
style={{
width: 200,
height: 100,
}}
source={{
uri: image.uri,
}}
/> : null : <Text>Face not found</Text>}
<TouchableOpacity
style={[styles.button, styles.buttonClose]}
onPress={() => setModalVisible(!modalVisible)}
>
<Text style={styles.textStyle}>Hide Modal</Text>
</TouchableOpacity>
</View>
</View>
</Modal>
</>
);
}
const styles = StyleSheet.create({
container: {
flex: 1,
flexDirection: 'column',
backgroundColor: 'black',
},
item: {
backgroundColor: '#FFF',
},
viewOne: {
flexDirection: 'row'
},
viewTwo: {
alignItems: 'flex-end', marginEnd: 9
},
title: {
fontSize: 16, // Semibold #000000
color: '#000000',
},
noOff: {
color: '#D65D35',
fontSize: 20, // Semibold
}, product: {
color: '#A6A6A6',
fontSize: 16, // Regular
}, titleView: {
flex: 1,
alignSelf: 'center',
marginStart: 14,
marginEnd: 14,
},
centeredView: {
flex: 1,
justifyContent: "center",
alignItems: "center",
marginTop: 22
},
modalView: {
margin: 20,
backgroundColor: "white",
borderRadius: 20,
padding: 10,
alignItems: "center",
shadowColor: "#000",
shadowOffset: {
width: 0,
height: 2
},
shadowOpacity: 0.25,
shadowRadius: 4,
elevation: 5
},
button: {
borderRadius: 20,
padding: 10,
elevation: 2
},
buttonOpen: {
backgroundColor: "#F194FF",
},
buttonClose: {
backgroundColor: "#2196F3",
},
textStyle: {
color: "white",
fontWeight: "bold",
textAlign: "center"
},
modalText: {
marginBottom: 15,
textAlign: "center"
},
preview: {
flex: 1,
justifyContent: 'flex-end',
alignItems: 'center',
},
capture: {
flex: 0,
backgroundColor: '#fff',
borderRadius: 5,
padding: 15,
paddingHorizontal: 20,
alignSelf: 'center',
margin: 20,
},
});
I am a newbie in react native. I tried to create a to-do app, simple enough. But I have no idea why the text in the created to-do item not rendered
import React, { useState } from 'react';
import {
StyleSheet,
Text,
View,
Button,
TextInput,
FlatList,
Dimensions
} from 'react-native';
export default function App() {
const [task, setTaskText] = useState('')
const [tasks, setTasks] = useState([])
const addTask = () => {
setTasks([...tasks, { key: Math.random().toString(), text: task}])
}
return (
<View style={styles.container}>
<View style={styles.form}>
<TextInput
onChangeText={setTaskText}
value={task}
placeholder="Type a task..."
style={styles.input}
multiline
/>
<Button title="Add Task" style={styles.button} onPress={addTask} />
</View>
<FlatList
style={styles.itemContainer}
data={tasks}
renderItem={itemData => (
<View style={styles.taskItem}>
<Text style={styles.taskText}>{itemData.text}</Text><Button title="Complete" />
</View>
)}
/>
</View>
);
}
const styles = StyleSheet.create({
container: {
flex: 1,
marginTop: 32,
backgroundColor: '#fff',
alignItems: 'center',
justifyContent: 'center',
},
form: {
// flex: 1,
flexDirection: 'row',
padding: 32,
justifyContent: 'space-between',
},
button: {
fontSize: 32,
padding: 5
},
tasks: {
flex: 1,
alignContent: 'flex-start',
},
input: {
flex: 1,
fontSize: 22,
},
itemContainer: {
flex: 1,
width: Dimensions.get('window').width,
padding: 20,
borderColor: 'red',
borderWidth: 1
},
taskItem: {
padding: 10,
borderColor: 'black',
borderWidth: 1,
backgroundColor: '#efefef',
marginBottom: 10,
alignContent: 'center',
justifyContent: 'center',
flexDirection: 'row'
},
taskText: {
flex: 1,
fontSize: 24,
borderColor: 'yellow',
borderWidth: 1,
color: 'black',
textAlign: 'left'
}
});
So I tried to use a flat list and gave some border color to pin point the component rendered. I could see that the text component was rendered but there is no content
Can anyone help? What went wrong?
Your implementation was wrong.
It should be renderItem({item, index, separators})
And for each of the item you should consume it like item.text
<FlatList
style={styles.itemContainer}
data={tasks}
renderItem={ ({item}) => (
<View style={styles.taskItem}>
<Text style={styles.taskText}>{item.text}</Text><Button title="Complete" />
</View>
)}
/>