I'm trying to use the expo-video-thumbnails package to generate a thumbnail from a video uri. The video uri is retrieved from async-storage. I get the following error
Argument of an incompatible class: class java.util.HashMap cannot be
passed as an argument to parameter expecting class java.lang.String.
If I use a static video uri, it works fine. I can't seem to get this to work with the value from AsyncStorage. Here's my code:
import React, { useState, useEffect } from 'react';
import { View, Image } from 'react-native';
import AsyncStorage from '#react-native-async-storage/async-storage';
import * as VideoThumbnails from 'expo-video-thumbnails';
export default function ThumbnailsScreen() {
// video uri
const [videoUri, setVideoUri] = React.useState({});
const getData = async () => {
try {
const value = await AsyncStorage.getItem('#lastRecordedVideo')
if(value !== null) {
setVideoUri(value)
}
} catch(e) {
console.log(e);
}
}
getData();
// thumbnails
const [image, setImage] = useState(null);
const generateThumbnail = async () => {
try {
const { uri } = await VideoThumbnails.getThumbnailAsync(
videoUri,
{
time: 1000,
}
);
setImage(uri);
} catch (e) {
console.warn(e);
}
};
useEffect(() => { generateThumbnail(); }, [])
return (
<View>
{image && <Image source={{ uri: image }} /> }
</View>
)
}
Related
I've been battling a bug in my code for the last 4 days and would appreciate some pointers to get me going in the right directions. Component is working fine as long as there is internet connection, but if there is no internet connection, audios and videos are not playing, only thumbnail present.
I'm using netInfo's NetInfo.fetch() to check for connection. If there is connection, I'm refetching data to check for any updates to student assignments.
I'm using expo-av for playing audio/video files (v10.2.1). I'm also using useQuery hook from react-query to fetch data about audio and video files (like url etc.) My video player component is something like this:
Video Player:
import React, {
forwardRef,
ForwardRefRenderFunction,
useCallback,
useImperativeHandle,
useRef
} from 'react';
import { Platform } from 'react-native';
import Orientation from 'react-native-orientation-locker';
import { Audio, Video, VideoFullscreenUpdateEvent, VideoProps } from 'expo-av';
const Player: ForwardRefRenderFunction<
Video | undefined,
VideoProps
> = (props, ref) => {
const innerRef = useRef<Video>(null);
const orientation = useCallback<
(event: VideoFullscreenUpdateEvent) => void
>(
(event) => {
if (Platform.OS === 'android') {
if (
event.fullscreenUpdate === Video.FULLSCREEN_UPDATE_PLAYER_DID_PRESENT
) {
Orientation.unlockAllOrientations();
} else if (
event.fullscreenUpdate === Video.FULLSCREEN_UPDATE_PLAYER_DID_DISMISS
) {
Orientation.lockToPortrait();
}
}
props.onFullscreenUpdate?.(event);
},
[props]
);
useImperativeHandle(ref, () => {
if (innerRef.current) {
return innerRef.current;
}
return undefined;
});
return (
<Video
resizeMode="contain"
useNativeControls
ref={innerRef}
onLoad={loading}
{...props}
onFullscreenUpdate={orientation}
/>
);
};
export const VideoPlayer = forwardRef(Player);
Custom Hook:
For async state management, I'm using a custom react-query hook, that looks something like this (non-relevant imports and code removed):
import { useFocusEffect } from '#react-navigation/core';
import { useCallback } from 'react';
import NetInfo from '#react-native-community/netinfo';
export const useStudentAssignment = (
assignmentId: Assignment['id']
): UseQueryResult<Assignment, Error> => {
const listKey = studentAssignmentKeys.list({ assignedToIdEq: studentData?.id });
const queryClient = useQueryClient();
const data = useQuery<Assignment, Error>(
studentAssignmentKeys.detail(assignmentId),
async () => {
const { data: assignment } = await SystemAPI.fetchAssignment(assignmentId);
return Assignment.deserialize({
...assignment,
});
},
{
staleTime: 1000 * 60 * 30,
initialData: () => {
const cache= queryClient.getQueryData<Assignment[]>(listKey);
return cache?.find((assignment) => assignment.id === assignmentId);
},
initialDataUpdatedAt: queryClient.getQueryState(listKey)?.dataUpdatedAt,
}
);
useFocusEffect(
useCallback(() => {
NetInfo.fetch().then((state) => {
if (state.isConnected) {
data.refetch();
}
});
}, [data])
);
return data;
};
Component:
import React, { FC, useCallback, useEffect, useMemo, useRef } from 'react';
import { SafeAreaView } from 'react-native-safe-area-context';
import { StackScreenProps } from '#react-navigation/stack';
import { ROUTES } from 'enums/SMSRoutes';
import { StoreType } from 'enums/SMSStoreType';
import { useStudentAssignment } from 'hooks/Assignments/useStudentAssignment';
import { RootStackParamList } from 'navigators';
import { AssignmentViewer } from 'screens/AssignmentViewer';
type NavProps = StackScreenProps<
RootStackParamList,
ROUTES.ASSIGNMENT_VIEW
>;
export const AssignmentView: FC<NavProps> = ({
navigation,
route: {
params: { assignmentId }
}
}) => {
const assignmentQuery = useStudentAssignment(assignmentId);
const assignmentTracker = useStore(StoreType.AssignmentTracker);
const isDoneRef = useRef<boolean>(false);
const questions = assignmentQuery.data?.questions || [];
const activeQuestion = useMemo(() => {
return questions.filter((question) => question.active);
}, [questions]);
const onDone = useCallback(() => {
isDoneRef.current = true;
navigation.push(ROUTES.ASSIGNMENT_COMPLETED);
}, [navigation]);
useEffect(() => {
assignmentTracker.start(assignmentId);
return () => {
assignmentTracker.finish(isDoneRef.current);
};
}, []);
return (
<SafeAreaView>
<AssignmentViewer
questions={activeQuestion}
onDone={onDone}
isLoading={assignmentQuery.isLoading}
/>
</SafeAreaView>
);
};
What I'm trying to do here is that if internet connection is connected and the user navigates to the current view (which is used to view assignments), I'd like to refetch the data. Per the requirements, I can't use the staleTime property or any other interval based refetching.
Component is working fine if I don't refetch, or if internet connection is present. If connection isn't there, it doesn't play the cache'd audio/video.
If I take out the check for internet connection (remove netInfo), component display videos both offline and online. However, refetching fails due to no connectivity.
What should I change to make sure that data is refetched when connected and videos are played even if not connected to Internet?
Does anyone know how to preload assets (mostly png) stored locally on AppLoading? I've already preloaded fonts and pasted the asset caching code snippet, what else?
This is how I preload my assets and you can refer doc
import React, { useState } from "react";
import { AppRegistry } from "react-native";
import { AppLoading } from "expo";
import * as Font from "expo-font";
import { Asset } from "expo-asset";
function App() {
const [assetsLoaded, setAssetsLoaded] = useState(false);
const _loadAssetsAsync = async () => {
const imageAssets = cacheImages([
require("./assets/images/car.png"),
require("./assets/images/game.png"),
require("./assets/images/home.png"),
require("./assets/images/wardrobe.png"),
]);
const fontAssets = cacheFonts([
{ "poppins-regular": require("./assets/fonts/regular.ttf") },
{ "poppins-bold": require("./assets/fonts/bold.ttf") },
{ "poppins-thin": require("./assets/fonts/thin.ttf") },
]);
await Promise.all([...imageAssets, ...fontAssets]);
};
if (!assetsLoaded) {
return (
<AppLoading
startAsync={_loadAssetsAsync}
onFinish={() => setAssetsLoaded(true)}
onError={console.warn}
/>
);
}
return (
<YourApp/>
);
}
function cacheImages(images) {
return images.map((image) => {
if (typeof image === "string") {
return Image.prefetch(image);
} else {
return Asset.fromModule(image).downloadAsync();
}
});
}
function cacheFonts(fonts) {
return fonts.map((font) => Font.loadAsync(font));
}
AppRegistry.registerComponent("App", () => App);
export default App;
I have been for several hours trying to get an API to be called in ReactNative useEffect hook. Sometimes when I restart my app the value is resolved. But most of the time, I have an Unhandled promise rejection. I googled and tried various methods. I tried using .then etc.. I just can't figure it out.
import React, { useState, useContext, useEffect } from 'react';
import { View, Text, StyleSheet, TouchableOpacity, FlatList } from 'react-native';
import { EvilIcons } from '#expo/vector-icons';
import jsonServer from '../api/jsonServer';
const ShowScreen = ({ navigation }) => {
const id = navigation.getParam('id');
const [post, setPost] = useState([]);
const getBlog = async () => {
const result = await jsonServer.get(`http://0.0.0.0/blog/docroot/jsonapi/node/article/${id}`);
return result;
}
useEffect(() => {
async function setToState() {
const val = await getBlog();
setPost(val);
}
setToState();
},[]);
return (
<View>
<Text>Here { console.log(post) }</Text>
</View>
);
};
ShowScreen.navigationOptions = ({ navigation }) => {
return {
headerRight: (
<TouchableOpacity
onPress={() =>
navigation.navigate('Edit', { id: navigation.getParam('id')
})}
>
<EvilIcons name="pencil" size={35} />
</TouchableOpacity>
)
};
};
const styles = StyleSheet.create({});
export default ShowScreen;
What you could do is something like this:
....
....
const [post, setPost] = useState([]);
const [isMounted, setIsMounted] = useState(false);
const getBlog = async () => {
const result = await jsonServer.get(`http://0.0.0.0/blog/docroot/jsonapi/node/article/${id}`);
return result;
}
useEffect(() => {
setIsMounted(true)
async function setToState() {
// using try catch I'm handling any type of rejection from promises. All errors will move to catch block.
try{
const val = await getBlog();
// checking if component is still mounted. If mounted then setting a value. We shouldn't update state on an unmounted component.
if(isMounted){
setPost(val);
}
} catch(err){
console.log("Error", err)
}
}
setToState();
return () => {
// Setting is mounted to false as the component is unmounted.
setIsMounted(false)
}
},[]);
I believe this will solve your Unhandled promise rejection error. Please try if it still doesn't solve the issue will create the same in Sanck.
I think my issue was not just promise, the issue is also seems to be me not handling undefined/null in the state. The below code is working for me.
import React, { useState, useContext, useEffect } from 'react';
import { View, Text, StyleSheet, TouchableOpacity, FlatList } from 'react-native';
import { EvilIcons } from '#expo/vector-icons';
import jsonServer from '../api/jsonServer';
const ShowScreen = ({ navigation }) => {
const id = navigation.getParam('id');
const [post, setPost] = useState([]);
const getBlog = async () => {
const result = await jsonServer.get(`http://hello.com/jsonapi/node/article/${id}`).then(
res => {
setPost(res)
return res;
}, err => {
console.log(err);
});
}
useEffect(() => {
setPost(getBlog());
},[]);
return (
<View>
<Text>{ post.data ? post.data.data.id : "" }</Text>
</View>
);
};
export default ShowScreen;
Note: I am setting the state in useEffect as well as in the request. I am yet to check if I can just do it once.
When I try to enter username and then go on next screen for live chating then I facing this error.
Here is code for ChatScreen.js file.
TypeError: undefined is not a function (near '..._fire.default.get...').
ChatScreen.js
import React,{Component} from "react";
import {Platform,KeyboardAvoidingView} from 'react-native';
import {GiftedChat}from 'react-native-gifted-chat-fix';
import{SafeAreaView}from 'react-native-safe-area-view';
import Video from 'react-native-video';
import Fire from '../fire';
export default class ChatScreen extends Component{
state={
messages:[]
}
get user(){
return{
_id:Fire.uid,
name:this.props.navigation.state.params.name
}
}
componentDidMount(){
Fire.get(message=>this.setState(previous=>({
messages:GiftedChat.append(previous.messages,message)
}))
);
}
componentWillUnmount(){
Fire.off()
}
render(){
const chat=<GiftedChat messages={this.state.messages} onSend={Fire.send} user={this.user}/>;
if(Platform.OS=='android'){
return(
<KeyboardAvoidingView style={{flex:1}}behavior="padding" keyboardVerticalOffset={30} enabled>
{chat}
</KeyboardAvoidingView>
);
}
return<SafeAreaView style={{flex:1}}>{chat}</SafeAreaView>;
}
}
Try changing the code in both files
At first in Fire.js
import firebase from 'firebase'; // 4.8.1
class Fire {
constructor() {
this.init();
this.observeAuth();
}
init = () => {
if (!firebase.apps.length) {
firebase.initializeApp({
apiKey:'AIzaSyAPfes9_2EwZESX1puYMUv29yunzK9Ve5U',
authDomain:'docman-31d96.firebaseapp.com',
databaseURL: "https://docman-31d96.firebaseio.com",
projectId: "docman-31d96",
storageBucket: "docman-31d96.appspot.com",
messagingSenderId: "649332068608",
appId:'1:649332068608:android:08c080ee6a4e521f5323e5'
});
}
};
observeAuth = () =>
firebase.auth().onAuthStateChanged(this.onAuthStateChanged);
onAuthStateChanged = user => {
if (!user) {
try {
firebase.auth().signInAnonymously();
} catch ({ message }) {
alert(message);
}
}
};
get uid() {
return (firebase.auth().currentUser || {}).uid;
}
get ref() {
return firebase.database().ref('messages');
}
parse = snapshot => {
const { timestamp: numberStamp, text, user } = snapshot.val();
const { key: _id } = snapshot;
const timestamp = new Date(numberStamp);
const message = {
_id,
timestamp,
text,
user,
};
return message;
};
on = callback =>
this.ref
.limitToLast(20)
.on('child_added', snapshot => callback(this.parse(snapshot)));
get timestamp() {
return firebase.database.ServerValue.TIMESTAMP;
}
// send the message to the Backend
send = messages => {
for (let i = 0; i < messages.length; i++) {
const { text, user } = messages[i];
const message = {
text,
user,
timestamp: this.timestamp,
};
this.append(message);
}
};
append = message => this.ref.push(message);
// close the connection to the Backend
off() {
this.ref.off();
}
}
Fire.shared = new Fire();
export default Fire;
and then in ChatScreen.js
import * as React from 'react';
import { Platform , KeyboardAvoidingView,SafeAreaView } from 'react-native';
// #flow
import { GiftedChat } from 'react-native-gifted-chat'; // 0.3.0
import Fire from '../fire';
type Props = {
name?: string,
};
class ChatScreen extends React.Component<Props> {
static navigationOptions = ({ navigation }) => ({
title: (navigation.state.params || {}).name || 'Chat!',
});
state = {
messages: [],
};
get user() {
return {
name: this.props.navigation.state.params.name,
_id: Fire.shared.uid,
};
}
render() {
const chat=<GiftedChat messages={this.state.messages} onSend={Fire.shared.send} user={this.user}/>;
if(Platform.OS=='android'){
return(
<KeyboardAvoidingView style={{flex:1}}behavior="padding" keyboardVerticalOffset={0} enabled>
{chat}
</KeyboardAvoidingView>
);
}
return<SafeAreaView style={{flex:1}}>{chat}</SafeAreaView>;
}
componentDidMount() {
Fire.shared.on(message =>
this.setState(previousState => ({
messages: GiftedChat.append(previousState.messages, message),
}))
);
}
componentWillUnmount() {
Fire.shared.off();
}
}
export default ChatScreen;
This helped for me It should work for you too
To see my chat app just visit https://snack.expo.io/#habibishaikh1/chatapp
So I'm trying to figure out the best way to display a Toast error and success function when the API call fires from redux.
My line of thinking: Create action for the API call. If successful, then I want the screen to change to the home screen. If it fails, then display the message in a Toast.
Here's what some of my actions look like:
export function getTokenAPI(username, password) {
return async function action(dispatch) {
try {
dispatch({ type: t.AUTH_GET_TOKEN });
dispatch(setLoading(true));
const { data } = await API.authGetToken(username, password);
const { success } = data;
if (success) {
const { access_token, refresh_token } = data;
dispatch(setAccessToken(access_token));
dispatch(setRefreshToken(refresh_token));
await dispatch(setLoading(false));
} else if (!success) {
const { errorMessage } = data;
throw Error(errorMessage);
}
} catch (e) {
dispatch(setError(e.message));
dispatch(setLoading(false));
}
};
}
The setError action sets the error key to true and sets the errorMessage. Here's what my screen looks like:
import React from 'react';
import { Container, View, Toast } from 'native-base';
import styles from './styles';
import { connect } from 'react-redux';
import { authActions } from '_ducks/auth';
const LoginScreen = props => {
const { getToken, navigation } = props;
const { navigate } = navigation;
const navigateToHome = () => navigate('Home');
const handleLogin = async () => {
const { error, errorMessage } = props;
await getToken('sample', 'pass123');
if (error) {
Toast.show({
text: errorMessage,
buttonText: 'kay',
});
} else {
navigateToHome();
}
};
return (
<Container>
<View style={styles.container}>
<LoginButton onPress={handleLogin} />
</View>
</Container>
);
};
const mapDispatchToProps = dispatch => ({
getToken: () => dispatch(authActions.getTokenAPI()),
});
const mapStateToProps = state => ({
isLoading: state.authReducer.isLoading,
error: state.authReducer.error,
errorMessage: state.authReducer.errorMessage,
});
export default connect(
mapStateToProps,
mapDispatchToProps,
)(LoginScreen);
So if there's an error, then display the toast. If it's successful, navigate to the home screen. Essentially, error will not be true quick enough to make the check within handleLogin work appropriately.
Any recommendations on the pattern or process? Should I be using a useEffect hook here?