The other way is to do it by drag and drop. You can do it programmatically, that is, type some code in xml and see the button appear. There are two ways to implement the button. If you didn't encounter any render errors you will see a screen with a text saying 'Hello world!'. If it didn't start, you can find it in app/res/layout/layout_main.xml: Now your MainActivity.java and activity_main.xml (if you kept the default name) should be opened. Make sure you choose Empty Activity, like so: You can name it whatever you want, I will simply call my project 'Button', with the package name.

The finished program will look like this:

I will be using the IDE Android Studio, but if you prefer to use another IDE you shouldn't have any problem following this tutorial. R.id.button1 refers to the button that we had created in our XML file.In this tutorial we will create a simple button that will answer us with a message when we click on it. This method returns a View which can then be type-casted to whatever view is needed. Then, we link the button from the XML part to the Java class by using findViewById() method.

We have to override onClick method on our class that is created. But when we use XML way, we can only implement it in Activity or MainActivity. Because when we use onClickListener, it can be implemented in both Activity and Fragments. This way is usually preferred by most developers. Note – The method takes View as a parameter. Do something when the button is clicked

Something like this – //Method in MainActivity Make sure there’s a button like this in XML – Īnd also, make sure there’s a method named ‘calculate’ (or any other name that you have given to your method in MainActivity. The value given to this attribute is the name of the method that’s defined in the MainActivity. To do this, we first create a button in the XML layout and then we add an attribute “android:onClick” to the button. We specify the onClick attribute in a button, in XML layout. There are 2 ways to handle click events of a button on Android – In this tutorial, we will learn about handling click events on Android.

Android studio tutorial button click