Wajahat Karim
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Wajahat Karim

Android Developer. Open Source Contributor. Writer. Speaker
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CET Education

February 21, 2017 in android, app, all
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Author's picture

Wajahat Karim

Android Developer. Open Source Contributor. Writer. Speaker

Senior Android Developer

Karachi, Pakistan
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How Java and Android Work Together

 Jan 1, 2019
When you write a program in Java for Android and click a button, your code is transformed into another form understood by Android. This other form is called Dalvik Executable, or DEX code, and the transformation process is called compiling. Android is a complex system, but you don’t need to understand it in depth to be able to make amazing apps. To get started, we only need to understand the basics.

EasyFlipViewPager — The Flip Animations For Your ViewPager

 Dec 12, 2018
A behind the scenes story of an open source Android library to create book & card flipping animations in ViewPager About 2 years ago, in January 2017, I released my first open source library **EasyFlipView** on Github. At that time, I was working on an English vocabulary type app for a client. One particular task was to create flashcards which had English word on one side and the meaning on other sides.

Multiple Runtime Permissions in Android Without Any Third-Party Libraries

 Nov 11, 2018
In my current project at work, I had a task to add run time permissions in an android app whose code is very old and using legacy methods and frameworks/tools. Normally, I use Ted Permissions in all my apps for the runtime permissions and I must say that it’s one hell of an amazing library I ever saw and given the complex scenario and flow of runtime permissions in Android (thanks to Google who always makes sure to make every thing more complicated than ever), this library makes the runtime permissions like a breeze.

Executing tiny asynchronous tasks quickly in Android under 10 lines

 Nov 11, 2018
Today, when I was working on a project, so I had a situation where I had to perform a very tiny operation in background in Android. I had lots of ideas such as AsyncTask or Thread or using such powerful framework like RxJava or using new APIs such as JobDispatcher or WorkManager etc. You can read about these options in this good article by Ali Muzaffar. But my major concern was that my requirement was a very simple and little one.

Next Stop: Flutter

 Nov 11, 2018
My first talk on Flutter vs. Other Frameworks Me giving talk on Flutter I recently shared with you about Pakistan’s first Flutter meetup in Karachi. Well, it happened on 10th November, 2018. Flutter Meetup #1 — Karachi It was organized by Flutter Karachi in collaboration with 10 Pearls University as venue partner. There were about 40+ persons who attended the meetup. More than 75% were professionals in various tech such as web development, mobile development, backend etc.

Converting JSONObject to HashMap<>

 Nov 11, 2018
Today, I had a huge Json in my app and I wanted to fetch all these values in a general way. I also wanted to parse Json for only one time to avoid try/catch each time I access any value. So, first thing I had in mind was to convert the JSONObject in the HashMap or Map<> etc. So if you are using Gson in your apps for json mapping, then you can use this one line code for conversion.

Overestimating the “Underestimating”

 Nov 11, 2018
I don’t know much about this but I will try my best! Photo of Deosai Plains (Pakistan) February 2018. I left my previous job and started looking for a new job. I had some interviews lined up. I had 7+ years of hands-on experience on mobile development, two world wide published books on Android, few open source libraries and a good portfolio. What I didn’t have was the self esteem and confidence.

Show/Hide Password in EditText in Android

 Nov 11, 2018
To showing/hiding the password dots in the EditText in android, here’s the easy one-line way. Here’s the dummy layout with an EditText and a CheckBox for toggling the password dots. <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_margin="16dp" android:orientation="vertical"> <EditText android:id="@+id/edtPassword" android:layout_width="match_parent" android:layout_height="wrap_content" android:hint="Enter password" android:inputType="textPassword" /> <android.support.v7.widget.AppCompatCheckBox android:id="@+id/checkbox" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Show Password" /> </LinearLayout> Now, you can toggle the password on the OnCheckedChangeListener using this snippet. checkbox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() { @Override public void onCheckedChanged(CompoundButton compoundButton, boolean value) { if (value) { // Show Password edtPassword.

Podcast — What’s Open Source? And What’s Hacktoberfest?

 Oct 10, 2018
I have always been more focused on writing and reading medium than the listening and speaking. But, recently I have started giving talks and doing public speaking a little. And I must say that I have been enjoying it a lot. And then an opportunity knocked my door and presented an other option for me to explore. That was podcasting and sharing my knowledge through audio channels. I have never created or talked in any podcast, so I was curious and interested at same time to explore this and see how this plays for me.

I Didn’t Accept Job Offer at Facebook. Here’s Why.

 Oct 10, 2018
I woke up at around 5:30 AM in morning. I was feeling very sleepy as I slept late at night. But it was no time for laziness as I had to get ready for traveling. I made tea and ate some bread as quick breakfast, got shower, locked my home and called Uber. Uber took me to a bus stop where I booked a seat in a bus. The bus was late about 20 minutes, but I left Karachi — the city of lights — at 7:20 AM.

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