I just learned about RN. I'm confused to make many markers in 1 map but the data must be from firebase
<View style={{ alignItems: "center" }}>
<View style={{ justifyContent: "center", alignItems: "center", marginTop: 10 }}>
<MapView
showsUserLocation={true}
style={{ width: 350, height: 200, marginRight: 20, marginLeft: 20 }}
initialRegion={{
latitude: -2.92532,
longitude: 132.29339,
latitudeDelta: 0.00431,
longitudeDelta: 0.0431,
}}>
<FlatList numColumns={4} data={Object.keys(this.state.data)} renderItem={({ item }) => {
return (
<MapView.Marker coordinate={{ latitude: parseFloat(this.state.data[item].latitude), longitude: parseFloat(this.state.data[item].longitude) }}
pinColor={"red"}
title={this.state.data[item].nama}
/>
)
}} />
</MapView>
</View>
</View>
Please can you help me? Im trying to do layout like this, from begining there will be camera but if I click button driving info it will be replaced with that, here is the layout I want and here is my code. Right now all the touchablehighlits(buttons) are overlaying, + camera window should be livestream from raspberry pi camera but right now Im focusing just on layout.
const MainScreen = () => {
return(
<View>
<View style={{flex: 33, flexDirection: 'row', justifyContent: 'flex-start', position: 'relative'}}>
<TouchableHighlight style={styles.button} >
<Text style={styles.txt}> CAMERA </Text>
</TouchableHighlight>
</View>
<View style={{flex: 33, flexDirection: 'row', justifyContent: 'center', position: 'relative'}}>
<TouchableHighlight style={styles.button} >
<Text style={styles.txt}> Lane assistant </Text>
</TouchableHighlight>
<TouchableHighlight style={styles.button} >
<Text style={styles.txt}> disconnect </Text>
</TouchableHighlight>
<TouchableHighlight style={styles.button} >
<Text style={styles.txt}> driving info </Text>
</TouchableHighlight>
</View>
<View style={{flex: 33, flexDirection: 'row', justifyContent: 'flex-end', position: 'relative'}}>
<TouchableHighlight style={styles.button} >
<Text style={styles.txt}>- </Text>
</TouchableHighlight>
<TouchableHighlight style={styles.button} >
<Text style={styles.txt}> cruise control </Text>
</TouchableHighlight>
<TouchableHighlight style={styles.button} >
<Text style={styles.txt}>+ </Text>
</TouchableHighlight>
</View>
</View>
);
}
const styles = StyleSheet.create({
button:{
justifyContent: 'space-between',
},
txt:{
fontSize: 30,
}
});
This should be fine:
export default function App() {
return (
<View style={{flex: 1}}>
<View style={styles.topContainer}>
<TouchableHighlight >
<Text> CAMERA </Text>
</TouchableHighlight>
</View>
<View style={{flex: 1}}>
<View style={styles.buttonRowContainer}>
<TouchableHighlight style={styles.touchableContainer} >
<Text > Lane assistant </Text>
</TouchableHighlight>
<TouchableHighlight style={styles.touchableContainer} >
<Text>disconnect </Text>
</TouchableHighlight>
<TouchableHighlight style={styles.touchableContainer} >
<Text > driving info </Text>
</TouchableHighlight>
</View>
<View style={styles.buttonRowContainer}>
<TouchableHighlight style={styles.touchableContainer} >
<Text >- </Text>
</TouchableHighlight>
<TouchableHighlight style={styles.touchableContainer} >
<Text > cruise control </Text>
</TouchableHighlight>
<TouchableHighlight style={styles.touchableContainer} >
<Text >+ </Text>
</TouchableHighlight>
</View>
</View>
</View>
);
}
const styles = StyleSheet.create({
buttonRowContainer: {
flex: 1, flexDirection: 'row'
},
touchableContainer: {
flex: 1, justifyContent: 'center', alignItems: 'center'
},
topContainer: {
flex: 1, justifyContent: 'center', alignItems: 'center'
}
})
I'm going to explain how flex works. If you only have one element with flex: 1 it will take all the screen space. This is usually done when you have a View which will contain all the other elements. If we want to divide the screen by two, we have to define 2 components with flex: 1
- Main -> flex: 1
- Children 1 -> flex: 1
- Children 2 -> flex: 1
Children 1 will take 50% of the screen size as well as Children 2. If we want children 1 to take 66% of the screen we simply add flex: 2. Is like telling React "hey, I want you to divide the screen in 3 equal parts, Children 1 takes 2 portions of the screen when Children 2 only takes 1". Remember this will only work if your parent has set flex.
I'm currently working on a react native application and I have an issue with flex.
At each time I add flex: 1 in the style of a View or a Text element, its height equal 0, which cause the element to disapear.
This is what I'm trying to design:
(of course the colors are only here to help the comprehension)
My code:
return (
<View style={{paddingVertical: 7, display: 'flex', flexDirection: 'row', alignItems: "center", justifyContent: 'center', height: 50, borderWidth: 1}}>
<View style={{flex: 1}}>
<View style={{display: 'flex', flexDirection: 'column'}}>
<View style={{flex: 1}}>
<View style={{display: 'flex', flexDirection: 'row'}}> <View style={{flex: 1, backgroundColor: '#0f0'}}>
<Text>
First name Last name
</Text>
</View>
<View style={{flex: 1}}>
<Text style={{textAlign: 'center'}}>
27 km
</Text>
</View>
</View>
</View>
<View style={{flex: 1}}>
<Text style={{textAlign: 'center'}}>Booked ride</Text>
</View>
</View>
</View>
<View style={{flex: 0}}>
<TouchableOpacity onPress={this.onTake}>
<Text style={styles.btnBox}>
Take
</Text>
</TouchableOpacity>
</View>
</View>
)
This is what I currenlty have (with two elements repeated):
The first nested <View> is useless, remove it and adjust the next one like this:
return (
<View
style={{
paddingVertical: 7,
display: 'flex',
flexDirection: 'row',
alignItems: 'center',
justifyContent: 'center',
height: 50,
borderWidth: 1,
}}>
<View style={{ flex: 1, flexDirection: 'column' }}>
<View style={{ flex: 1 }}>
<View style={{ display: 'flex', flexDirection: 'row' }}>
<View style={{ flex: 1, backgroundColor: '#0f0' }}>
<Text>First name Last name</Text>
</View>
<View style={{ flex: 1 }}>
<Text style={{ textAlign: 'center' }}>27 km</Text>
</View>
</View>
</View>
<View style={{ flex: 1 }}>
<Text style={{ textAlign: 'center' }}>Booked ride</Text>
</View>
</View>
<View style={{ flex: 0 }}>
<TouchableOpacity onPress={this.onTake}>
<Text>Take</Text>
</TouchableOpacity>
</View>
</View>
I've also created a snack in case you want to take a look: example.
Now you can align your texts as you pref :)
I am trying to make this highlighted line to stretch full width. I have tried many possible ways to come around it but could not get it as desired.
Here is my code from render() method.
return (
<ScrollView style={{backgroundColor: 'rgba(255,255,255,1)'}}>
<View style={styles.container}>
<Image style={styles.image} source={{uri: imageURI}} />
<View style={styles.content}>
<Text style={styles.title}>{news.title}</Text>
<View style={styles.itemIcons}>
<View style={styles.companyView}>
<Image
source={{uri: news.category[0].sourceImage}}
style={ styles.iconsImage} />
<Text style={styles.iconsText}>{news.category_name}</Text>
</View>
<Text style={styles.iconsTextRight}>{this.formatDate(news.pubDate)}</Text>
</View>
<Text style={styles.description}>{description}</Text>
</View>
</View>
</ScrollView>
);
And here are my styles for this.
container: {
flex: 1,
alignItems: 'center',
},
content: {
flex: 1,
flexDirection: 'column',
padding: 10
},
image: {
width: width,
height: custom_height,
// padding: 10
},
title: {
marginBottom: 15
},
itemIcons: {
flex: 1,
flexDirection: 'row',
alignSelf: 'stretch',
marginBottom: 15
},
iconsImage: {
height: 25,
width: 30,
marginRight: 10,
},
iconsText: {
fontSize: 12,
color: "#686666",
alignSelf: 'flex-end'
},
companyView: {flex:1,flexDirection:'row'},
dateView: {flex:1,alignSelf: 'flex-end'},
iconsTextRight: {
fontSize: 12,
color: "#686666",
alignSelf: 'flex-end'
},
description: {
padding: 2,
fontSize: 12,
color: '#323'
}
Change container style to
container: {
flex: 1,
}
Then the view will be aligned as per your requirement.
try this in itemIcons class
justify-content:'space-between'
I couldn't work with whole of your code, but as per the screenshot you posted, I was able to achieve this.
<View style={{flex:1}}>
<View style={{flexDirection:'row',paddingTop:100,justifyContent:'space-between',alignItems:'center'}}>
<View style={{flexDirection:'row',alignItems:'center'}}>
<Image source={require('./images/tiger.jpg')} style={{width:40,height:40}} />
<Text>Roche</Text>
</View>
<Text>25 Mar 2016, 18:16</Text>
</View>
</View>
Try to replicate this in your code and see if it works.
I have already read several flexbox tutorial, but I still cannot make this simple task to work.
How can I make the red box to 100% width?
Code:
<View style={styles.container}>
<Text style={styles.welcome}>
Welcome to React Natives
</Text>
<Text style={styles.line1}>
line1
</Text>
<Text style={styles.instructions}>
Press Cmd+R to reload,{'\n'}
Cmd+D or shake for dev menu
</Text>
</View>
style:
container: {
flex: 1,
justifyContent: 'center',
alignItems: 'center',
backgroundColor: '#F5FCFF',
borderWidth: 1,
flexDirection: 'column',
},
welcome: {
fontSize: 20,
textAlign: 'center',
margin: 10,
borderWidth: 1,
},
line1: {
backgroundColor: '#FDD7E4',
},
instructions: {
textAlign: 'center',
color: '#333333',
marginBottom: 5,
borderWidth: 1,
},
Thank you!
Update 1:
Suggestion by Nishanth Shankar, adding
flex:1 for the wrapper,
flexDirection: 'row'
Output:
Code:
<View style={styles.container}>
<View style={{flex:1}}>
<Text style={styles.welcome}>
Welcome to React Natives
</Text>
</View>
<View style={{flex:1}}>
<Text style={styles.line1}>
line1
</Text>
</View>
<View style={{flex:1}}>
<Text style={styles.instructions}>
Press Cmd+R to reload,{'\n'}
Cmd+D or shake for dev menu
</Text>
</View>
</View>
container: {
flex: 1,
justifyContent: 'center',
alignItems: 'center',
backgroundColor: '#F5FCFF',
borderWidth: 1,
flexDirection: 'row',
flexWrap: 'wrap',
},
welcome: {
fontSize: 20,
textAlign: 'center',
margin: 10,
borderWidth: 1,
},
line1: {
backgroundColor: '#FDD7E4',
},
instructions: {
textAlign: 'center',
color: '#333333',
marginBottom: 5,
borderWidth: 1,
},
Simply add alignSelf: "stretch" to your item's stylesheet.
line1: {
backgroundColor: '#FDD7E4',
alignSelf: 'stretch',
textAlign: 'center',
},
You should use Dimensions
First, define Dimensions.
import { Dimensions } from "react-native";
var width = Dimensions.get('window').width; //full width
var height = Dimensions.get('window').height; //full height
then, change line1 style like below:
line1: {
backgroundColor: '#FDD7E4',
width: width,
},
Editted:
In order to flex only the center text, a different approach can be taken - Unflex the other views.
Let flexDirection remain at 'column'
remove the alignItems : 'center' from container
add alignSelf:'center' to the textviews that you don't want to flex
You can wrap the Text component in a View component and give the View a flex of 1.
The flex will give :
100% width if the flexDirection:'row' in styles.container
100% height if the flexDirection:'column' in styles.container
Here you go:
Just change the line1 style as per below:
line1: {
backgroundColor: '#FDD7E4',
width:'100%',
alignSelf:'center'
}
First add Dimension component:
import { AppRegistry, Text, View,Dimensions } from 'react-native';
Second define Variables:
var height = Dimensions.get('window').height;
var width = Dimensions.get('window').width;
Third put it in your stylesheet:
textOutputView: {
flexDirection:'row',
paddingTop:20,
borderWidth:1,
borderColor:'red',
height:height*0.25,
backgroundColor:'darkgrey',
justifyContent:'flex-end'
}
Actually in this example I wanted to make responsive view and wanted to view only 0.25 of the screen view so I multiplied it with 0.25, if you wanted 100% of the screen don't multiply it with any thing like this:
textOutputView: {
flexDirection:'row',
paddingTop:20,
borderWidth:1,
borderColor:'red',
height:height,
backgroundColor:'darkgrey',
justifyContent:'flex-end'
}
Use javascript to get the width and height and add them in View's style.
To get full width and height, use Dimensions.get('window').width
https://facebook.github.io/react-native/docs/dimensions.html
getSize() {
return {
width: Dimensions.get('window').width,
height: Dimensions.get('window').height
}
}
and then,
<View style={[styles.overlay, this.getSize()]}>
width: '100%' and alignSelf: 'stretch' didn't work for me. Dimensions didn't suite my task cause I needed to operate on a deeply nested view. Here's what worked for me, if I rewrite your code. I just added some more Views and used flex properties to achieve the needed layout:
{/* a column */}
<View style={styles.container}>
{/* some rows here */}
<Text style={styles.welcome}>
Welcome to React Natives
</Text>
{/* this row should take all available width */}
<View style={{ flexDirection: 'row' }}>
{/* flex 1 makes the view take all available width */}
<View style={{ flex: 1 }}>
<Text style={styles.line1}>
line1
</Text>
</View>
{/* I also had a button here, to the right of the text */}
</View>
{/* the rest of the rows */}
<Text style={styles.instructions}>
Press Cmd+R to reload,{'\n'}
Cmd+D or shake for dev menu
</Text>
</View>
just remove the alignItems: 'center' in the container styles and add textAlign: "center" to the line1 style like given below.
It will work well
container: {
flex: 1,
justifyContent: 'center',
backgroundColor: '#F5FCFF',
borderWidth: 1,
}
line1: {
backgroundColor: '#FDD7E4',
textAlign:'center'
},
Style ={{width : "100%"}}
try this:
StyleSheet generated: {
"width": "80%",
"textAlign": "center",
"marginTop": 21.8625,
"fontWeight": "bold",
"fontSize": 16,
"color": "rgb(24, 24, 24)",
"fontFamily": "Trajan Pro",
"textShadowColor": "rgba(255, 255, 255, 0.2)",
"textShadowOffset": {
"width": 0,
"height": 0.5
}
}
Noted: Try to fully understanding about flex concept.
<View style={{
flex: 2,
justifyContent: 'center',
alignItems: 'center'
}}>
<View style ={{
flex: 1,
alignItems: 'center,
height: 50,
borderWidth: 1,
borderColor: '#000'
}}>
<Text>Welcome to React Nativ</Text>
</View>
<View style={{
flex: 1,
alignItems: 'center,
borderWidth: 1,
borderColor: 'red ',
height: 50
}}
>
<Text> line 1 </Text>
</View>
<View style={{
flex: 1,
alignItems: 'center,
height: 50,
borderWidth: 1,
borderColor: '#000'
}}>
<Text>
Press Cmd+R to reload,{'\n'}
Cmd+D or shake for dev menu
</Text>
</View>
</View>
Simply use width:'100%'
line1: {
backgroundColor: '#FDD7E4',
width: '100%'
},