react native expo blank white screen after splash screen
There are numerous solutions proposed but to actually understand your problem, you need to take a look at how Expo recommends debugging production issues.
Specifically, what I did was to run expo start --no-dev --minify
and see if you can reproduce the issue. (Note: this doesn't refresh when you change your code so you'd need to quit the Expo Go app and re-launch it to see the changes.)
For my issue, I was able to reproduce locally using the above method, and I was missing keyExtractor={(_, id) => id.toString()}
in FlatList
.
MANOJ H M
Updated on July 30, 2022Comments
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MANOJ H M almost 2 years
{ "expo": { "name": "Csearch", "slug": "Csearch", "version": "1.0.0", "orientation": "portrait", "sdkVersion": "38.0.0", "icon": "./assets/icon.png", "splash": { "image": "./assets/splash.png", "resizeMode": "contain", "backgroundColor": "#2e64ae" }, "updates": { "fallbackToCacheTimeout": 0 }, "assetBundlePatterns": ["**/*"], "android": { "package": "com.geekonomy.Csearch", "versionCode": 1 }, "ios": { "supportsTablet": true }, "web": { "favicon": "./assets/favicon.png" } } }
package.json
{ "main": "node_modules/expo/AppEntry.js", "scripts": { "start": "expo start", "android": "expo start --android", "ios": "expo start --ios", "web": "expo start --web", "eject": "expo eject" }, "dependencies": { "@react-native-community/masked-view": "0.1.10", "@react-navigation/drawer": "^5.8.6", "@react-navigation/native": "^5.7.1", "@react-navigation/stack": "^5.7.1", "expo": "~38.0.8", "expo-status-bar": "^1.0.2", "firebase": "^7.17.1", "native-base": "^2.13.13", "react": "~16.11.0", "react-dom": "~16.11.0", "react-native": "https://github.com/expo/react-native/archive/sdk-38.0.2.tar.gz", "react-native-easy-grid": "^0.2.2", "react-native-elements": "^2.0.4", "react-native-gesture-handler": "~1.6.0", "react-native-maps": "^0.27.1", "react-native-reanimated": "~1.9.0", "react-native-safe-area-context": "~3.0.7", "react-native-screens": "~2.9.0", "react-native-web": "~0.11.7", "react-router-native": "^5.2.0" }, "devDependencies": { "@babel/core": "^7.8.6", "babel-preset-expo": "~8.1.0" }, "private": true }
App.js
export default class App extends React.Component { constructor(props) { super(props); this.state = { user: {}, isReady: false, }; } authListener() { fire.auth().onAuthStateChanged((user) => { if (user) { this.setState({ user }); } else { this.setState({ user: null }); } }); } async componentDidMount() { await Font.loadAsync({ Roboto: require("native-base/Fonts/Roboto.ttf"), Roboto_medium: require("native-base/Fonts/Roboto_medium.ttf"), ...Ionicons.font, }); this.setState({ isReady: true }, () => { this.authListener(); }); } render() { if (!this.state.isReady) { return <AppLoading />; } return ( <NativeRouter> <BackButton /> <Switch> <Route exact path="/"> {this.state.user ? <DashBoard /> : <Login />} </Route> <Route path="/criminalDetails" component={ShowSelectedCriminals}> {/* {this.state.user ? <ShowSelectedCriminals /> : <Login />} */} </Route> <Route path="/gangDetails" component={SelectedGangDetails}> {/* {this.state.user ? <SelectedGangDetails /> : <Login />} */} </Route> <Route path="/gangCriminalDetails" component={GangCriminalDetails}> {/* {this.state.user ? <GangCriminalDetails /> : <Login />} */} </Route> <Route path="/ShowGangs"> {this.state.user ? <ShowGangs /> : <Login />} </Route> <Route path="/Showdata"> {this.state.user ? <Showdata /> : <Login />} </Route> </Switch> </NativeRouter> ); } } const styles = StyleSheet.create({ container: { flex: 1, backgroundColor: "#fff", alignItems: "center", justifyContent: "center", }, });
Login.js
class Login extends Component { constructor(props) { super(props); this.login = this.login.bind(this); this.state = { email: "", password: "", }; } login() { fire .auth() .signInWithEmailAndPassword(this.state.email, this.state.password) .then((u) => { console.log(u); }) .catch((error) => { console.log(error); }); } render() { return ( <View style={styles.container}> {/* <Image style={{ height: 25, width: 25, }} source={require("../assets/login.png")} /> */} <Item floatingLabel> <Label>Email</Label> <Input onChangeText={(email) => this.setState({ email })} /> </Item> <Item floatingLabel last> <Label>Password</Label> <Input secureTextEntry={true} onChangeText={(password) => this.setState({ password })} placeholder="Password" /> </Item> <Item style={{ marginTop: 10, marginBottom: 10, justifyContent: "center", alignItems: "center", borderBottomColor: "white", }} > <Button info onPress={this.login}> <Text> Login </Text> </Button> </Item> </View> ); } } const styles = StyleSheet.create({ container: { flex: 1, backgroundColor: "#fff", alignItems: "center", justifyContent: "center", backgroundColor: "#2e64ae", }, }); export default Login;
DashBoard.js
const Drawer = createDrawerNavigator(); const DashBoardStack = createStackNavigator(); const ShowGangsStack = createStackNavigator(); const ShowCriminalsStack = createStackNavigator(); const DashBoardStackScreen = ({ navigation }) => ( <DashBoardStack.Navigator screenOptions={{ headerStyle: { backgroundColor: "#2e64ae", }, headerTintColor: "#fff", headerTitleStyle: { fontWeight: "bold", }, }} > <DashBoardStack.Screen name="DashBoard" component={InitialDb} options={{ title: "CSearch", headerLeft: () => ( <TouchableOpacity onPress={() => navigation.openDrawer()}> <Entypo name="menu" size={24} color="black" /> </TouchableOpacity> ), headerRight: () => ( <TouchableOpacity onPress={() => fire.auth().signOut()}> <AntDesign name="logout" size={24} color="black" /> </TouchableOpacity> ), }} /> </DashBoardStack.Navigator> ); const ShowGangsStackStackScreen = ({ navigation }) => ( <ShowGangsStack.Navigator screenOptions={{ headerStyle: { backgroundColor: "#2e64ae", }, headerTintColor: "#fff", headerTitleStyle: { fontWeight: "bold", }, }} > <ShowGangsStack.Screen name="ShowGangs" component={ShowGangs} options={{ title: "CSearch", headerLeft: () => ( <TouchableOpacity onPress={() => navigation.openDrawer()}> <Entypo name="menu" size={24} color="black" /> </TouchableOpacity> ), headerRight: () => ( <TouchableOpacity onPress={() => fire.auth().signOut()}> <AntDesign name="logout" size={24} color="black" /> </TouchableOpacity> ), }} /> </ShowGangsStack.Navigator> ); const ShowCriminalsStackScreen = ({ navigation }) => ( <ShowCriminalsStack.Navigator screenOptions={{ headerStyle: { backgroundColor: "#2e64ae", }, headerTintColor: "#fff", headerTitleStyle: { fontWeight: "bold", }, }} > <ShowCriminalsStack.Screen name="ShowCriminals" component={ShowData} options={{ title: "CSearch", headerLeft: () => ( <TouchableOpacity onPress={() => navigation.openDrawer()}> <Entypo name="menu" size={24} color="black" /> </TouchableOpacity> ), headerRight: () => ( <TouchableOpacity onPress={() => fire.auth().signOut()}> <AntDesign name="logout" size={24} color="black" /> </TouchableOpacity> ), }} /> </ShowCriminalsStack.Navigator> ); export default class DashBoard extends React.Component { render() { return ( <> {/* <Image style={{ width: 400, height: 400, borderRadius: 400 / 2 }} source={require("../assets/login.png")} /> */} <NavigationContainer> <BackButton /> <Drawer.Navigator initialRouteName="DashBoard"> <Drawer.Screen name="DashBoard" component={DashBoardStackScreen} /> <Drawer.Screen name="ShowGangs" component={ShowGangsStackStackScreen} /> <Drawer.Screen name="ShowCriminals" component={ShowCriminalsStackScreen} /> </Drawer.Navigator> </NavigationContainer> </> ); } }
Here, in the above code, while running it in metro bundler, using expo run android command, the app is running properly in expo without any issue or error. But When I build the apk using expo build:android, and try to install it in my physical device, then it's showing the splash screen and after that it is showing the white blank screen. Not routing to Login component or DashBoard component either
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Angel Venchev over 3 yearsI am having the same issue but if I kill the app on the device it will start the second time.
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Angel Venchev over 3 yearsI got my problem fixed. The issue was related to preloading some fonts and images in the App.js file in case you still haven't solved it
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Kumawat over 3 yearswhat was the fix? Did you remove them or what? Please help
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MANOJ H M over 3 years@ManishKumawat after removing map library from expo it worked
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justacoder over 3 years@MANOJHM which map library?
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Nick Sinai about 3 years@AngelVenchev this was my problem, thanks!
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J. Jerez over 2 yearshi Taku, what version of the sdk are you using?