Develop Reference

React Material UI: Textfield maxLength not working in Android

I am using React Material UI and want to implement max length for a TextField component.
I tried to set max length in inputProps as below -
<TextField
id="name"
label="Name"
inputProps={{ maxLength: 5 }}
/>
This works in desktop browsers as expected, but doesn't seem to work in mobile devices browsers, expecially in most Android mobiles with Chrome latest version.
Not sure about IOS, as not tested in that environment.
Please refer the stackblitz here for reference.
To replicate, please open the above stackblitz in a mobile device browser prefebaly in Chrome.
I can go with regex, but I think setting up max length attribute to a field seems very clean and semantic.
Please let know if there is any way.

If your input filed type='number' then it will not work.
You can try this solution. I think it will work.
<TextField
onInput = {(e) =>{
e.target.value = Math.max(0, parseInt(e.target.value) ).toString().slice(0,12)
}}/>

React Native - Text Transform issue with Android Simulator

Is there a known issue with TextTransform:'uppercase' with Android?
I'm fairly new to React native and just finished building views, all looked great in Ios but on Android - no button text displaying. After a series of trial and error I found that the issue seems to be textTransform:'uppercase', if I remove this from the stylesheet the text displays fine.
Has anyone experienced this? I cant find any information about the bug on the web.
This is my Code:
return (
<View style={AppStyles.buttonRect} >
<View style={AppStyles.buttonRectWrap}>
<Image style={AppStyles.buttonRectIcon} source={this.props.buttonIcon} />
<Text style={AppStyles.btnText}>{this.props.buttonTxt}</Text>
</View >
</View>
);
with a style of :
btnText:{
color:'#fff',
marginRight:14,
marginLeft:10,
fontSize:20,
alignSelf: 'center',
marginTop:-3,
textTransform:'uppercase',
},
which results in -
If I remove the transform line:
I've tried with several simulators and get the same error.

This is currently a bug with React Native. A fix appears to be in 0.59.0 release, since the 0.59.0 release candidates don't contain the bug. Source: https://github.com/facebook/react-native/issues/21966

There is a known issue. Basically using textTransform breaks text styling for android. Even textTransform: none will break your styling. Issue link: https://github.com/facebook/react-native/issues/21966

I'm facing the same issue with react native version 0.58.5, this seems to be a well known bug. Try using normal JS to capitalize strings for now:
capitalizeString = (text: string) => typeof text === 'string' && text.length > 0 && ${text[0].toUpperCase()}${text.slice(1)}
capitalizeString('mystring')
or just:
string.toUpperCase();
ref: https://github.com/facebook/react-native/issues/21966

The workaround this issue I found was to create a component that renders the props.children and chain the .toUpperCase method.
react-native text-transform uppercase

Show Decimal Keyboard in ReactJS for iOS

My application is ReactJS. I am using WKWebview on iOS.
I am using number format react-number-format for input.
This component not supported(type="number"). You can use only "text,tel,password" type.
<input type="number" pattern="[0-9]*"/> I can't use this.
So, I wrote the following code.
<NumberFormat id="numberFormat" decimalSeparator="," thousandSeparator="." inputMode="decimal" pattern="[0-9]*" .../>
Android device screenshot:
Its correct for me.
IOS device screenshot:
Its wrong for me.
I want to see ",(comma)" on the keyboard(decimal pad)
Kindly review and give feedback.

I solved my problem by adding the following line of code.
<NumberFormat id="numberFormat" decimalSeparator="," thousandSeparator="." inputMode="decimal" pattern="[0-9],*" .../>
But IOS Safari supporting version 12.2 or higher on inputMode="decimal" .
Thanks.

Add a settings page looking like in native app

I would like to create settings page which would look like the settings on native platform (eg. PreferenceActivity/Fragment with xml on Android).
I am used to design the settings page by creating simple preference xml on Android which handles the basic settings flawlessly, however I am unable to find the similar mechanism in Xamarin.Forms which would do the same thing for all platforms natively (with the gui part). I just only found the SettingsPlugin which handles "Create and access settings from shared code across all of your apps!".
https://github.com/jamesmontemagno/SettingsPlugin
I would really appreciate any recommendation on designing the settings pages.

You can use a TableView, which is an original Xamarin Forms User interface (without any plugin).
If you set his Intent="Settings" , you can display a nice list of configuration settings like SwitchCell, EntryCell, or a CustomCell.
Displaying these elements depend on the operating system and on the version of it. So it looks and feels different on f.e. Android 4.4 and different on Android 8.
For example:
<TableView Intent="Settings">
<TableRoot>
<TableSection Title="My settings">
<EntryCell Label="Name:" Placeholder="Enter Your First Name Here"/>
<SwitchCell Text="Show my name" On="true"/>
<SwitchCell Text="Update app automatically"/>
</TableSection>
</TableRoot>
</TableView>
Which will render something (not exactly that) like this: {source of img}

nativescript-mapbox showing black Map Markers

I am having an issue in the android emulator where my svg/icon Layers are showing as black. This sometimes effects highway/road markers as well as my map markers. The plugin is currently using the default marker, but I have also provided my own png file and they both suffer from this problem.
Sometimes zooming in will fix it (as can be seen for one of the markers in the image below)
I am yet to test this on any other device and have only been using an android emulator from android studio.
Some extra details
I am running nativescript with Angular (and TS), I have commented out any extraneous code that adds markers etc and am still having the issue on highway number markers (example below). Here is my template:
<StackLayout class="page">
<ContentView height="100%" width="100%">
<Mapbox
accessToken="token"
mapStyle="streets"
[latitude]=defaultLocation.latitude
[longitude]=defaultLocation.longitude
hideCompass="true"
zoomLevel="8"
showUserLocation="false"
disableZoom="false"
disableRotation="false"
disableScroll="false"
disableTilt="false"
(mapReady)="onMapReady($event)">
</Mapbox>
</ContentView>
</StackLayout>
It seems like I can trigger this with a call to removeMarkers and addMarkers with this code:
updateUserMarker(loc) {
console.log("updating user location marker with loc: ", loc)
this.map.removeMarkers([this.userMarker.id]);
this.userMarker.lat = loc.latitude;
this.userMarker.lng = loc.longitude;
this.map.addMarkers([this.userMarker]);
}

I had the same problem and I removed Android Studio and reinstalled and downloaded a new OS image and it seems to have fixed the problem.
Not sure you still have this issue but thought I would put this here for any new users with the issue as this was the only post I could find relating to this.

If you are running this on an emulator then make sure to go to it's settings and select the following :
OpenGL ES renderer as "SwiftShader"
OpenGL ES API Level as "Renderer maximum"
and restart the android emulator.