Unable to Apply Layout Animation Using Reanimated API - react-native

I'm trying to apply layout animation to a FlatList upon adding and deleting a goal (list item) using the Reanimated API. I'm mainly following this tutorial from the Reanimated docs but I don't know why the animation is not applied when list items are added or removed. I should also inform that I'm only testing this on an Android device. Here is the code:
App.js (contains FlatList)
import { useState } from "react";
import { Button, FlatList, StyleSheet, View } from "react-native";
import GoalInput from "./components/GoalInput";
import GoalItem from "./components/GoalItem";
export default function App() {
const [goalList, setGoalList] = useState([]);
const [isModalOpen, setIsModalOpen] = useState(false);
const styles = StyleSheet.create({
appContainer: {
paddingTop: 50,
},
});
function startAddGoalHandler() {
setIsModalOpen(true);
}
// spread existing goals and add new goal
function addGoalHandler(enteredGoalText) {
setGoalList((currentGoals) => [
...currentGoals,
{ text: enteredGoalText, id: Math.random().toString() },
]);
}
function deleteGoalHandler(id) {
setGoalList((currentGoals) =>
currentGoals.filter((existingGoals) => existingGoals.id !== id)
);
}
return (
<View style={styles.appContainer}>
<Button
title='Add New Goal'
color='indigo'
onPress={startAddGoalHandler}
/>
{isModalOpen && (
<GoalInput
isModalOpen={isModalOpen}
setIsModalOpen={setIsModalOpen}
onAddGoal={addGoalHandler}
></GoalInput>
)}
<FlatList
keyExtractor={(item, index) => {
return item.id;
}}
data={goalList}
renderItem={(itemData) => {
return (
<GoalItem
onGoalDelete={deleteGoalHandler}
itemData={itemData}
/>
);
}}
/>
</View>
);
}
GoalItem.js (list item)
import React from "react";
import { Pressable, StyleSheet, Text } from "react-native";
import Animated, { Layout, LightSpeedInLeft, LightSpeedOutRight } from "react-native-reanimated";
const GoalItem = ({ itemData, onGoalDelete }) => {
const styles = StyleSheet.create({
goalCards: {
elevation: 20,
backgroundColor: "white",
shadowColor: "black",
height: 60,
marginHorizontal: 20,
marginVertical: 10,
borderRadius: 10,
},
});
return (
<Animated.View
style={styles.goalCards}
entering={LightSpeedInLeft}
exiting={LightSpeedOutRight}
layout={Layout.springify()}
>
<Pressable
style={{ padding: 20 }}
android_ripple={{ color: "#dddddd" }}
onPress={() => onGoalDelete(itemData.item.id)}
>
<Text style={{ textAlign: "center" }}>
{itemData.item.text}
</Text>
</Pressable>
</Animated.View>
);
};
export default GoalItem;
I've even tried replacing the FlatList with View but to no avail. I suspect that Reanimated isn't properly configured for my project, if I wrap some components with <Animated.View>...</Animated.View> (Animated from Reanimated and not the core react-native module) for example the child components will not show. Reanimated is installed through npm
Any help is appreciated, thanks!

Related

React Native Snap Carousel Functional Component Issue

I'm using this snack as a template for implementing my own carousel component. This template is using Class Component and I converted it to a Functional component
https://snack.expo.io/#bd-arc/react-native-snap-carousel-%7C-example-with-custom-interpolations
I added this to my project and I believe some error is happening when rendering the Carousel but I'm unable to tell. It renders - but not all the components are rendering. I have only changed the Carousel itself to a function component. The problem is the is not showing below the Carousel - also if I add multiple VideoCarousel's, only the first one displays.
My code is below
App.js
import React from 'react';
import { View } from 'react-native';
import Header from './components/header';
import VideoCarousel from './components/videoCarousel';
import tailwind from 'tailwind-rn';
const App = () => {
return (
<View style={tailwind('flex pt-12 items-center bg-gray-300 h-full')}>
<Header />
<VideoCarousel />
<VideoCarousel />
</View>
)
};
export default App;
VideoCarousel.js
import React, { useState } from 'react';
import { Text, View, Dimensions, StyleSheet, Alert } from 'react-native';
import Carousel from 'react-native-snap-carousel'; // Version can be specified in package.json
import { scrollInterpolator, animatedStyles } from './../utils/animations';
const SLIDER_WIDTH = Dimensions.get('window').width;
const ITEM_WIDTH = Math.round(SLIDER_WIDTH * 0.7);
const ITEM_HEIGHT = Math.round(ITEM_WIDTH * 3 / 4);
const DATA = [];
for (let i = 0; i < 10; i++) {
DATA.push(i)
}
const VideoCarousel = () => {
const [index, setIndex] = useState(0);
_renderItem = (index) => {
return (
<View style={styles.itemContainer}>
<Text style={styles.itemLabel}>{`Item ${index.index}`}</Text>
</View>
);
}
return (
<View>
<Carousel
data={DATA}
renderItem={this._renderItem}
sliderWidth={SLIDER_WIDTH}
itemWidth={ITEM_WIDTH}
containerCustomStyle={styles.carouselContainer}
inactiveSlideShift={0}
onSnapToItem={(index) => setIndex(index)}
scrollInterpolator={scrollInterpolator}
slideInterpolatedStyle={animatedStyles}
useScrollView={true}
/>
<Text style={styles.counter}>
Test
</Text>
</View>
);
}
const styles = StyleSheet.create({
carouselContainer: {
marginTop: 50
},
itemContainer: {
width: ITEM_WIDTH,
height: ITEM_HEIGHT,
alignItems: 'center',
justifyContent: 'center',
backgroundColor: 'dodgerblue'
},
itemLabel: {
color: 'white',
fontSize: 24
},
counter: {
marginTop: 400,
fontSize: 30,
fontWeight: 'bold',
textAlign: 'center',
backgroundColor: "black",
}
});
export default VideoCarousel;

Flatlist rendering empty space

i'm new to react native and trying to use flatlist inside another component that's been rendered by another flatlist.
My concern is in the nested flatlist used like this:
Card component
import React, { useContext } from "react"
import { View, Image, Text, StyleSheet, FlatList } from "react-native";
import { QueryContext } from "../context/QueryContext"
function Card(props) {
const [query, setQuery] = useContext(QueryContext)
const { genres_list } = query
const { posterURLs, originalTitle, genres } = props
const listData = []
genres.forEach(genre => {
listData.push({ key: genres_list[genre] })
})
const renderItem = (item) => {
return (
<View>
<Text style={styles.item}>
{item.index}
{item.key}
</Text>
</View>
)
}
return (
<View style={styles.container}>
<Image
style={styles.images}
source={{ uri: posterURLs["original"] }} />
<Text style={styles.title}>{originalTitle}</Text>
<FlatList
data={listData}
renderItem={renderItem}
keyExtractor={(item)=> item.key}
/>
</View>
);
}
const styles = StyleSheet.create({
images: {
width: 400,
height: 500
},
container: {
flex: 1,
backgroundColor: 'lightgrey',
justifyContent: 'center',
alignItems: 'center',
},
title: {
fontSize: 30
},
item: {
padding: 10,
fontSize: 15,
color: "red",
},
})
I have to prepare the data for the flatlist since is inside an object that comes from the context. Weirdly enough i can see the index from item.index but not the item.key which makes me think is some styling issue but as much change i make i'm unable to see it
The card component is rendered by another flatlist and i don't know if that matters or not.
Thanks in advance
Nothing was showing because the data item.key values were actually stored in item.item.key

Why is React Native FlatList not working on Android but it is for Web?

I am using Expo to build a react native app with AWS for the backend.
I am trying to display a list of friends using FlatList and the AWS data. The list works and is visible on my web browser, but for some reason, it is not displaying on my Android phone. What might the issue be?
FriendsList.tsx
import { API, graphqlOperation } from 'aws-amplify';
import * as React from 'react';
import {useEffect, useState} from 'react';
import { FlatList, View, ScrollView, Text, StyleSheet } from 'react-native';
import { listUsers } from '../graphql/queries';
import FriendsListItem from '../components/FriendsListItem';
export default function FriendsList() {
const [ users, setUsers ] = useState([]);
useEffect( () => {
const fetchUsers = async () => {
try {
const usersData = await API.graphql(
graphqlOperation(
listUsers
)
)
setUsers(usersData.data.listUsers.items);
} catch (e) {
}
}
fetchUsers();
},[])
return (
<View style={ styles.container }>
<FlatList
style={{ width: '100%' }}
data={users}
renderItem={({ item }) => <FriendsListItem user={item} />}
keyExtractor={(item) => item.id}
/>
</View>
);
}
const styles = StyleSheet.create({
container: {
flex: 1,
alignItems: 'center',
justifyContent: 'center',
},
});
FriendsListItem.tsx
import * as React from 'react';
import { View, Text, StyleSheet, Image, TouchableWithoutFeedback } from 'react-native';
import { API, graphqlOperation, Auth } from "aws-amplify";
import { User } from './types';
export type FriendsListItemProps = {
user: User;
}
const FriendsListItem = ( props: FriendsListItemProps ) => {
const { user } = props;
return (
<TouchableWithoutFeedback>
<View style={styles.container}>
<View style={styles.lefContainer}>
<Image source={{ uri: user.imageUri }} style={styles.avatar}/>
<View style={styles.midContainer}>
<Text style={styles.username}>{user.name}</Text>
<Text numberOfLines={2} style={styles.status}>{user.email}</Text>
</View>
</View>
</View>
</TouchableWithoutFeedback>
);
}
export default FriendsListItem;
const styles = StyleSheet.create({
container: {
flexDirection: 'row',
width: "100%",
justifyContent: 'space-between',
//height: '100%',
},
lefContainer: {
flexDirection: 'row',
padding: 16,
},
midContainer: {
justifyContent: 'space-around'
},
avatar: {
width: 60,
height: 60,
borderRadius: 50,
marginRight: 15,
},
username: {
fontWeight: 'bold',
fontSize: 16,
},
status: {
fontSize: 16,
color: 'grey',
},
});
Looking at the code example, in your FriendsListItem component, any time you use your "user" prop, you need to change it. For example, change this:
user.imageUri
to this:
user.item.imageUri
What you are passing in is an object (e.g. user), which then contains another object (e.g. item), which finally contains your data (e.g. imageUri).
I figured it out. Turns out I am just an idiot. The expo app on my phone was logged into a different account so that's why it wasn't showing any friends for that user.

Two of my common components that I'm importing with index.js don't fire

I'm doing this course at Udemy. Files: https://github.com/StephenGrider/ReactNativeReduxCasts/tree/master/auth
The issue I'm having is with importing common components. It's only for 2 of the common components--the rest work fine. Card, CardSection, Header, Input.
When I try to import the Button or Spinner, they won't fire. But if I use the basic functionality (putting the TouchableOpacity or ActivityIndicator in the file directly and do all the styling THERE), they work fine.
Here's the file structure:
Here's /components/common/index.js
export * from './Header';
export * from './Input';
export * from './Card';
export * from './CardSection';
export * from './Button';
export * from './Spinner';
Here's Button.js
import React from 'react';
import { Text, TouchableOpacity } from 'react-native';
const Button = ({ propOnPress, children }) => {
const { buttonStyle, textStyle } = styles;
return (
<TouchableOpacity onPress={propOnPress} style={buttonStyle}>
<Text style={textStyle}>
{children}
</Text>
</TouchableOpacity>
)
}
const styles = {
textStyle: {
alignSelf: 'center',
color: '#fff',//'#007aff',
fontSize: 16,
fontWeight: '600',
paddingTop: 10,
paddingBottom: 10
},
buttonStyle: {
flex: 1,
alignSelf: 'stretch',
backgroundColor: '#007aff', //'#fff',
borderRadius: 5,
borderWidth: 1,
borderColor: '#007aff',
marginLeft: 5,
marginRight: 5,
}
}
export { Button };
Here's Spinner.js
import React from 'react';
import { View, ActivityIndicator } from 'react-native';
const Spinner = ({ size }) => {
return (
<View style={styles.spinnerStyle}>
<ActivityIndicator size={size || 'large'} />
</View>
)
}
const styles = {
spinnerStyle: {
flex: 1,
justifyContent: 'center',
alignItems: 'center'
}
}
export { Spinner }
Here's where I import them in LoginForm.js
import { Card, CardSection, Button, Spinner, Input } from './common';
And where they're used in the code in LoginForm.js
renderButton() {
//console.log('render button');
if (this.state.loading) {
console.log('returning the spinner');
return <Spinner animating={this.state.loading} size="small" />;
}
console.log('gonna return a button');
return(
<Button onPress={this.onYouPressedIt.bind(this)}>Log in</Button>
);
}
What am I doing wrong?
Issues I see with the Button.js file
Property onPress doesn't exist. You created a property called propOnPress
So, your Button component should be used like this
<Button propOnPress={}>...</Button>
Issues I see with the Spinner.js file
Property animating doesn't exist on the component. The only properties you created is size.
Solution would be to simply add an animating property to your Spinner component.
Component would end up looking like this
const Spinner = ({ animating, size }) => {
return (
{
animating ? (
<View style={styles.spinnerStyle}>
<ActivityIndicator size={size || 'large'} />
</View>
) : null
}
)
}
I assume the animating property is a boolean which if false then you don't want to display the activity indicator which is why I added the ternary operator.

Using react-spring for react-native

I want to use this library for react-native but couldn't figure out how. The documentation link for react-native is broken. Can i use the library for react-native?
React-Spring can be used for react-native. They have updated it for all platform.
Try this out:-
yarn add react-spring#5.3.0-beta.0
import React from 'react'
import { StyleSheet, Text, View, TouchableWithoutFeedback } from 'react-native'
import { Spring, animated } from 'react-spring/dist/react-spring-native.esm'
const styles = {
flex: 1,
margin: 0,
borderRadius: 35,
backgroundColor: 'red',
alignItems: 'center',
justifyContent: 'center',
}
export default class App extends React.Component {
state = { flag: true }
toggle = () => this.setState(state => ({ flag: !state.flag }))
render() {
const { flag } = this.state
return (
<Spring native from={{ margin: 0 }} to={{ margin: flag ? 100 : 0 }}>
{props => (
<TouchableWithoutFeedback onPressIn={this.toggle}>
<animated.View style={{ ...styles, ...props }}>
<Text>It's working!</Text>
</animated.View>
</TouchableWithoutFeedback>
)}
</Spring>
)
}
}
`
For anyone with issues, try using a different import. This worked for me on expo's react native.
import React, { Component } from 'react';
import { Text, View, TouchableWithoutFeedback } from 'react-native';
import { Spring, animated } from 'react-spring/renderprops-native';
const AnimatedView = animated(View);
const styles = {
flex: 1,
margin: 0,
backgroundColor: 'red',
alignItems: 'center',
justifyContent: 'center',
}
export default class App extends Component {
state = { flag: true }
toggle = () => this.setState(state => ({ flag: !state.flag }))
render() {
const { flag } = this.state
return (
<Spring
native
from={{ margin: 0 }}
to={{ margin: flag ? 100 : 0 }}
>
{props => (
<TouchableWithoutFeedback onPressIn={() => this.toggle()}>
<AnimatedView style={{ ...styles, ...props }}>
<Text>{flag ? "true" : 'false'}</Text>
</AnimatedView>
</TouchableWithoutFeedback>
)}
</Spring>
);
}
}
The example below works.
import React, {Component} from 'react';
import {Platform, StyleSheet, Text, View, TouchableWithoutFeedback} from 'react-native';
import { Spring, animated } from 'react-spring'
const AnimatedView = animated(View)
const styles = {
flex: 1,
margin: 0,
borderRadius: 35,
backgroundColor: 'red',
alignItems: 'center',
justifyContent: 'center',
}
type Props = {};
export default class App extends Component<Props> {
state = { flag: true }
toggle = () => this.setState(state => ({ flag: !state.flag }))
render() {
const { flag } = this.state
return (
<Spring native from={{ margin: 0 }} to={{ margin: flag ? 100 : 0 }}>
{props => (
<TouchableWithoutFeedback onPressIn={this.toggle}>
<AnimatedView style={{ ...styles, ...props }}>
<Text>It's working!</Text>
</AnimatedView>
</TouchableWithoutFeedback>
)}
</Spring>
);
}
}