AlarmManager is a bridge between application and Android system alarm service. It can send a broadcast to your app (which can be completely terminated by user) at a scheduled time and your app can then perform any task accordingly. With the help from PendingIntent and Intent, a bundle of information…

ViewPager2 is introduced in this year 2019 Google I/O and is a replacement of the old ViewPager, which was created in 2011. It includes some new features to enhance UI and coding experience, including: Right-to-left layout support Vertical orientation (Scroll vertically) modifiable Fragment collections

TabLayout is a common widget working with ViewPager and ViewPager2. User can tap on each tap to go to a specific page in ViewPager directly. The most common example is the Google Play Store app.

Dot presentation to TabLayout is common in many apps. There are only 4 steps to configure the dots! Click to read more. 😁

NFC stands for “Near Field Communication”. Two electronic devices can transmit data through NFC when they are distanced fewer than 4 cm apart. NFC can be used for electronic payment. It was invented many years ago but it has just been introduced by Apple to iPhone series since the launch…

A Visual Approach for Everyone, Even Secondary School Students — Have you ever wondered about the reasoning behind “-1 x -1 = +1”? Does it seem like magic or a mere mathematical rule to be memorized? While online explanations exist, they often come across as dull and overly abstract, making them challenging for regular students to grasp. If you…

3-Steps to Send Out an SMS message — SMS is probably the most reachable communication service among all the phone user. There is no need to install any 3rd party application to support sending out and receiving an SMS message. Apple has provided the default ‘Messages” app for iOS user.

Email is one of the best communication channels in the 21st century. Information can be delivered to a group of recipients in a few seconds. Have you ever thought of integrating the email function into your app? Apple has provided a simple-to-use framework — MessageUI for developers. …

Texts in 9 languages & both 1D and 2D barcodes are supported — In the WWDC 2022, Apple releases the DataScannerViewController of the VisionKit. It is a UIViewController that can detect both text and barcodes locally without a network connection. The response rate and the accuracy are both high. It supports all the 9 languages below: English French Italian German Spanish Portuguese Chinese…