HKDevTips

Tuesday, January 8, 2019

NFC notes on NDEF message for URL

Just a note for encoding URL in NDEF message, the NDEF record should user TNF_WELL_KNOWN as its TNF. And NDEF record type should be RTD_URI. And the first byte could be encoded for different protocols (e.g. 0x01 = "http://www", 0x02 = "https://www", etc.

References:
Beginning NFC
Professional NFC Application Development for Android

Tuesday, December 18, 2018

Spring Boot Application Properties List

The list of Spring Boot Application Common Properties:

https://docs.spring.io/spring-boot/docs/current/reference/html/common-application-properties.html

Resources for jQuery i18n library

jQuery i18n is a handy library to provide multi-language for your web applications. Below are some useful references:

The Advanced Guide to jQuery i18n

Inject git last commit id to SpringBoot project

1) Add git-commit-id-plugin in pom.xml

<groupId>pl.project13.maven</groupId>

<artifactId>git-commit-id-plugin</artifactId>

<goals>

<goal>revision</goal>

</goals>

</execution>

</executions>

<dotGitDirectory>${project.basedir}/.git</dotGitDirectory>

<includeOnlyProperty>git.commit.id.abbrev</includeOnlyProperty>

</includeOnlyProperties>

</configuration>

</plugin>
...
</plugins>
</build>

2) Get the value via Thymeleaf

<head th:with="abbrev=${@environment.getProperty('git.commit.id.abbrev')}">

Sunday, August 19, 2018

Strange blue border in MapView of ArcGIS JS 4

Starting from ArcGIS JS 4.x, under some special conditions, the MapView will have a blue border when the MapView is focus, who genius get this geneless idea?

To get rid of this stupid box, style the following:

.esri-view-surface--inset-outline::after {
    outline: none !important;
    padding: 0px !important;
}

So when this stupid design will come out? When ever your HTML got the following conditions, that stupid box will be shown when MapView is on focus:

body {
    margin: 0;
}

#mapDiv {
    width: 100%
}

... The most weird API ever encountered

Friday, July 20, 2018

Updating graphic in ArcGIS JS 4.x GraphicsLayer

Esri still don't have a clue on how to modify a graphic in GraphicsLayer directly at version 4.8.

You still need to clone the graphic, remove the existing one, and add the new one to realize the modification.

Ref:

https://developers.arcgis.com/javascript/latest/guide/functionality-matrix/index.html#graphicslayer

Stone age API.

Friday, April 27, 2018

Android: get resource ID from resource name

That's a nice resource:

https://stackoverflow.com/questions/3476430/how-to-get-a-resource-id-with-a-known-resource-name

Thursday, April 19, 2018

QEMU references

QEMU is a quick and clean solution for emulation. However, when compare to its alternatives like Virtualbox, it requires much more attention on its settings and tweak in order to get things work. The followings are some nice resources to make our life easier with that tool:

QEMU setting

Wednesday, March 7, 2018

Map server URL with query parameters in ArcGIS JS 4.6

Starting from ArcGIS JS 4.6, the map server URL should not have any query parameters. Any query parameters exists in the map server URL will be removed.

To handle this issues, you can override the urlUtils.removeQueryParameters() as below

require(["esri/core/urlUtils"], function(urlUtils) {

urlUtils.removeQueryParameters = function(a){
return a;
};

});

But somehow that's a bad trick. A better way is to use the TileLayer._set() to get rid of the parameters stripping action when setting the URL. i.e.

TileLayer._set('url', 'map_server_url')

Using Proxy with ArcGIS JS

For servers without CORS enabled. We can use proxy mechanism to access the services.

This is done by modifying the proxy.ashx.

You can also add any parameters before sending the request to the actual server.

More references could be found at:

https://developers.arcgis.com/javascript/latest/guide/proxies/index.html