Respond to the collector is not displayed on android

Question

I am trying to add a collector in response to my own android, but it does not appear on android. I match the date of my location with the selection, but I did not see the collector on the screen.

<Picker selectedValue={this.state.location}> <Picker.Item label="Location 1" value="1" /> <Picker.Item label="Location 2" value="2" /> <Picker.Item label="Location 3" value="3" /> </Picker> 

Answer 1

You need to set the onValueChange method

I am trying to add a collector in responsive native Android, but it does not appear in Android. I match the date of my location with the selection, but I do not see it on the screen.

 <Picker style={{width: 100}} selectedValue={this.state.location} onValueChange={(loc) => this.setState({location: loc})}> <Picker.Item label="Location 1" value="1" /> <Picker.Item label="Location 2" value="2" /> <Picker.Item label="Location 3" value="3" /> </Picker> 

Answer 2

For me, it was "alignItems:" center "," on the parent view. "

I would comment on all / every style of your styles.container

Answer 3

Do you give it width and height? That was my problem

Answer 4

The picker does not appear on the screen if it does not have a style with the property of height, weight or flexibility

 <Picker style={{flex:1}} > <Picker.Item label="Location 1" value="1" /> <Picker.Item label="Location 2" value="2" /> <Picker.Item label="Location 3" value="3" /> </Picker> 

Answer 5

It worked for me too , assigning the width to the assembler specifically.