Develop Reference

React Native Text Input Has Hidden Padding On Android

I have the following code which is used to put a text label right next to a text input inline:
<View style={{ flexDirection: "row", alignItems: "center" }}>
<Text
style={{ fontSize: 16, backgroundColor: "green" }}
>
🇺🇸 +1{" "}
</Text>
<TextInput
style={{
fontSize: 16,
backgroundColor: "red",
flex: 1,
}}
placeholder="Enter your phone number"
/>
</View>
As you can see, I put them in a flex row view, aligning them to the center. For some reason, on Android, you can see the text input has a larger height, despite having the same font size.
There seemed to be some kind of hidden padding so I tried adding padding: 0 but that didn't work either. On iOS, they are the exact same height. Any idea of what I can do here?
To be clear, I want them to be the same height on Android as iOS correctly does. Thank you for your help.

You may add paddingVertical: 0 to style. This will reset the Android native module padding.
<View style={{ flexDirection: "row", alignItems: "center" }}>
<Text
style={{ fontSize: 16, backgroundColor: "green" }}
>
🇺🇸 +1{" "}
</Text>
<TextInput
style={{
fontSize: 16,
backgroundColor: "red",
flex: 1,
paddingVertical: 0
}}
placeholder="Enter your phone number"
/>
</View>
Result
Source: https://stackoverflow.com/a/37882782/20002061

"opacity" breaks the shadow on React Native view

Explanation: In the code below, the main view has a style opacity set to 1 and shadow works perfectly. When I set the opacity to 0.6, shadow makes the view disrupted. Please check the images to see the difference. How do I solve this problem?
Note: I didn't test it on IOS but it looks like this on android.
<View
style={{
flex: 1,
justifyContent: 'center',
alignItems: 'center',
opacity: 1,
}}>
<View
style={{
padding: 20,
borderRadius: 10,
backgroundColor: Colors.white,
shadowColor: '#000',
elevation: 5,
}}>
<Text>Test 123</Text>
</View>
<View></View>
</View>

react-native style opacity for parent and child

React Native - can't scroll inside ScrollView wrapped inside animated view on Android

I have a <ScrollView />, wrapped inside an Animatable.View (a wrapper for Animated.View with a few standard animations)
Like this:
<Animatable.View
animation={this.state.businessSlide}
duration={500}
delay={this.state.delay}
useNativeDriver={false}
easing={"ease-in-cubic"}
onAnimationEnd={this.handleBusinessPop}
>
<ScrollView
style={{ width: "100%", alignSelf: "center", height: 175, zIndex: 999 }}
contentContainerStyle={{ alignSelf: "center", justifyContent: "center", alignItems: "center", flexGrow: 1 }}
onScroll={(event) => this.businessScroll(event)}
scrollEventThrottle={16}
>
{this.state.businessMerchants.map((merchant, index) => (
<Business
merchant={merchant}
key={merchant.id}
isCurrentItem={index === this.state.currentItemIndex}
/>
))}
<View style={{ height: 100 }} />
</ScrollView>
</Animatable.View>
The view slides in from the bottom the position.
I believe this is due to some sort of overlap or something, as if I set the translate distance to 0, (i.e. it animates to where it would be normally without the animated view), it scrolls fine.
This only happens on Android, iOS works as expected.

React Native TextInput multiline bottom

I have one TextInput with some predefined text.
The problem is that on Android the text is displayed at the bottom of the text input. I tryed with textAlignVertical: 'top' to display it at top position, but without success the strange thing is that on the IOS is working perfectly
React Native TextInput Multiline
multiline
If true, the text input can be multiple lines. The default value is false. It is important to note that this aligns the text to the top on iOS, and centers it on Android. Use with textAlignVertical set to top for the same behavior in both platforms.
current behaviour:
the text is displayed at the bottom
desired behaviour:
the text to be displayed at the top
index.js
render() {
return (
<View style={{
flex: 1,
alignItems: 'center',
justifyContent: 'center',
backgroundColor: '#ecf0f1',
paddingTop: 20,
paddingBottom: 50,
paddingLeft: 20,
paddingRight: 20}}>
<TextInput
style={{
flex: 1,
textAlignVertical: 'top',
borderWidth: 1}}
autoCapitalize={'none'}
autoCorrect={false}
value={this.state.textTabs}
multiline={true}
onChangeText={(text) => {this.setState({textTabs: text})}}
underlineColorAndroid={'transparent'}
editable={true}
/>
</View>
);}
Thanks in advance

Horizontal scrollview auto scroll if textInput text is long enough

I've create a tab application with a paging horizontal scroll view has 3 pages like this
<ScrollView
showsHorizontalScrollIndicator={false}
style={{ flex: 1 }}
contentContainerStyle={{ height: '100%' }}
pagingEnabled
horizontal>
<View style={{ width, backgroundColor: 'red' }}>
<TextInput style={{ width, backgroundColor: '#FFF', height: 100 }} />
</View>
<View style={{ width, backgroundColor: 'green' }} />
<View style={{ width, backgroundColor: 'blue' }} />
</ScrollView>
As you can see, in the first tab, there's an TextInput, if you enter a long text (about ~50 characters), the scrollview auto scroll and break the UI (see image below)
The issue only happen on low version Android (5.1, 4.4, 4.2), works well on high version and on iOS