Pause or delay in UI thread (Android)

In my Android apps, I want to pause or delay a process before continuing to the next process. Previously, I utilized Thread.sleep(), but it is not recommended by some experts due to the effect of some elements may stop responding and furthermore will behave unexpectedly. Let’s see the solution below.

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Keep a list of object in SharedPreferences and TinyDB (Android)

In my  Android application project, I need a solution how to keep a list of the object can be accessed from any activities. Initially, I download the list from the server, then I want the app just read the downloaded data without contacting the server again. We cannot put the list of the object directly into SharedPreferences. There are some solutions that I found on the forum. Let’s see.

Show AlertDialog from Custom Adapter Android (AppCompat style)

I got some problems when trying to show alert dialog in a custom adapter, not inside an activity. In this case, I used AppcompatActivity. After searching and trying many times, I found an answer in the Stackoverflow. Let see it.

How to send POST request in Postman app (problem: missing parameter)

Some days ago, I got a problem when testing a web service using POSTMAN. I want to send a POST request with a parameter. But, it showed that I miss a parameter.

[Ubuntu] Solve problem ” /var/lib/dpkg/lock – open (13: Permission denied) “

It was happen when I want to run command sudo apt-get update && apt-get upgrade . 

Could not open lock file /var/lib/dpkg/lock – open (13: Permission denied)

[Ubuntu] Solve problem “How to Mount Windows 8’s OS Partition in Ubuntu 12.04 and later”

This problem happen when after shut down the Windows 8 then I want to open my data partition through Ubuntu 14.04. The error dialog said “Error Mounting…”

error mount partition in ubuntu 14.04

[Ubuntu] Install TLP : Saving battery more for our ubuntu

I have a problem about the condition of battery in Ubuntu, although the usage of resource system is better than Windows, but the battery is faster to lost. I tried to install TLP instead jupiter that discontinued.

start tlp on terminal

Learning Class Diagram

Now, we will learn about class diagram and what is the example for understanding this model.

Learning Sequence Diagram

After we learn about Use Case and Activity Diagram, now we want to learn about Sequence Diagram. On this post, I use “Use case Add Course” which the actor is “registrar admin”.

How to Install WindowBuilder on Eclipse Luna

On this posting, I want to share how to install WindowBuilder on Eclipse Luna (4.4). Although I used Eclipse Luna, but the implementation also can be used for other version. Why we install WindowBuilder?