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Those variables are defined in res/values/strings.xml Note that in my activity_main.xml I have 2 string variable for button name and text input placeholder. You can see the XML screen by clicking the XML tab in the bottom.

You can take my layout by copying the XML code below and replace your activity_main.xml code with it. With button, don’t forget to give a value to onClick attribute, this value will be the name of the function you will define later on to be trigger when the button is hit. Should give every component a meaning id so that you can easily recall it while doing the Java code.

Listview: where list all the tasks of user’s.

Button: where the user taps to add the task into the list.

EditText: where user types in a task they want to do.

I suppose that all of you know how to set up an Android Studio project. The first thing we need to do is lay out our application, thanks to Android studio, this hasn’t been that easy before. This will be done in Java and lately, I will make the same app using Kotlin.Ĭheck out my full video here: (just be aware that my Englist is bad) Create the App Layout At first, this app only allows the user to add task without checking for completing or removing task. Today, we’re gonna make a simple Todo app for Android using Android Studio 3.