B4XGoods-B4X好物整理，每周六更新

B4ATutorialPreferences

PreferenceActivity tutorial

PreferenceActivity tutorial

@Erel · 2020-05-10

B4ATutorialFile handling

Getting file info using uri from content chooser or from received shared file - example

Example of getting file property information from uri provided by content chooser or received file shared to the app. Curtesy of Erelâs example: Received Share. Shows File name, Mime Type, date modified, file size and a list of all columns from that particular content provider. updated code to show information from Gallery content.

@Nokia · 2020-05-04

B4ATutorialList- and scrollview

Part 1 Basics - Creating long lists using xCustomListView with Lazy Loading - Newer developers

Part 1 Basics - Creating long lists using xCustomListView with Lazy Loading - Newer developers

@Peter Simpson · 2020-05-01

B4ATutorialList- and scrollview [XCUSTOMLISTVIEW]

Creating long lists of data using xCLV [xCustomListView] with Lazy Loading - New B4Xers

Creating long lists of data using xCLV [xCustomListView] with Lazy Loading - New B4Xers

@Peter Simpson · 2020-04-28

B4ATutorialOS

Orientation and accelerometer

Orientation and accelerometer. The attached program displays the values of the different sensors: It creates a PhoneSensors object for each type of sensor. As you can see in the attached code, two Maps are used to hold the phone sensors and the other required data. This way there is no need to write any duplicate code.

@Erel · 2020-04-28

B4ATutorialBarcode/scan

Generate QR-Code w. RSA Public Key and scan/load it

Here''s an example how to generate a QR code containing a RSA Public Key (can be any data you need) in B4J and scan/load the key in B4A (based on the B4x QR code examples from Erel).

@KMatle · 2020-04-27

B4ATutorialList- and scrollview

ListView tutorial

ListView tutorial

@Erel · 2020-04-27

B4ATutorialHome automation

Experimental Powered air purifying respirator

Although very similar to a BiPAP device, This device could only be considered as very low-cost Powered Air Purifying Respirator (PAPR) with filter adapter and mask.

@freedom2000 · 2020-04-22

B4ATutorialList- and scrollview [XUI]

CustomListView with floating titles [XUI]

CustomListView with floating titles [XUI]

@Erel · 2020-04-21

B4ATutorialB4A [TIP]

Reset the manifest editor code to the default code [Tip]

Use case: you downloaded an old example and you want to reset the manifest editor code so it will have the correct targetSdkVersion and theme. Open the manifest editor, delete all text and save it. Open the manifest editor code again and the default text will appear.

@Erel · 2020-04-21

B4ATutorialB4A

Create an Android virtual machine or laptop

Create an Android virtual machine or laptop

@hatzisn · 2020-04-20

B4ATutorialBarcode/scan

Using Camera2 with Zxing for live scan of 1D and 2D barcodes

Using Camera2 with Zxing for live scan of 1D and 2D barcodes

@Johan Schoeman · 2020-04-19

B4ATutorialB4A

Using CustomBuildAction to deploy to multiple devices at once

Using CustomBuildAction to deploy to multiple devices at once

@Erel · 2020-04-19

B4ATutorialApp protection

Protect your application against copy and changes

Protect your application against copy and changes

@Informatix · 2020-04-14

B4ATutorialJSON

Retrieving 2 JSON data feeds from an online server - Shared module with B4i

Here is a simple to follow B4i tutorial on how to retrieve JSON data from an online server, in this case I''m using a well known Coronavirus COVID-19 data feed. The project layout file can easily be copied and pasted into a B4A layout file, you can also place the code module into a shared folder as B4i and B4A both use the exact same shared code module.

@Peter Simpson · 2020-04-14

B4ATutorialJSON

Retrieving 2 JSON data feeds from an online server - Wear OS watch face

Retrieving 2 JSON data feeds from an online server - Wear OS watch face

@Peter Simpson · 2020-04-14

B4ATutorialCalendar

Working with Calendars using ContentResolver

IÂ´m playing around with the Calendars on my Device and want to Query them. I found out how it works using ContentResolver querying the ContentProvider available in Android.

@DonManfred · 2020-04-11

B4ATutorialBarcode/scan

QR Code - Store image/bitmap in a QR Code

QR Code - Store image/bitmap in a QR Code

@Johan Schoeman · 2020-04-10

B4ATutorialGoogle

CREATE, UPDATE, DELETE AND CONSULT REGISTERS ON GOOGLE SHEET FROM YOUR APPLICATIONS

Searching the internet I found a service that allows you to convert any google sheet into a json api, it has a free version that allows you to consult and add data, connecting to the api is quite simple, as some of us have thought of using google sheet integrated to our developments by I want to show how this tool works.

@fernando1987 · 2020-04-02

B4ATutorialIcons / fonts

Change Icon and Assets Files based on the Build Configuration

Change Icon and Assets Files based on the Build Configuration

@Erel · 2020-03-30

B4ATutorialB4A [B4A]

Free Mini Course Android Development Environment Preparation [B4A]

Free Mini Course Android Development Environment Preparation [B4A]

@arenaluigi · 2020-03-30

B4ATutorialMQTT

MQTT client on service working a few seconds by minute to preserve battery

At start i wanted to monitor 2 SOS buttons for seniors. My first idea was to use a rfbridge sonoff programmed with tasmota and a MQTT on mobile, but a MQTT client working full time in a mobile take more than 30% of battery : it is not usable. Second idea was to use a gateway between rfbridge and my mobile

@candide · 2020-03-24

B4ATutorialIn-App Billing