in React JS by
Q:

react native expo blank white screen after splash screen

> app.json

{

  "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

javascript

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+1 vote
asked May 29, 2020 in React JS by anonymous
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