AIDE—Developing for Android on Android

When you get to the end of this line and start typing "</", the editor automatically will fill in the rest of the line for you. When you refresh the build, the error should go away, assuming that you haven't introduced any typos.

Figure 12. You can add new string resources to the file strings.xml.

Buttons are expected to trigger some reaction, however. This means you likely will want to add some kind of callback to a function in your button. This is handled within the layout file where the button is defined. You can add an extra property, "onClick", which gives a method name to be called when the button is clicked. For example, you might have the following in the button definition:


You then can add the function "my_method" to the file This new method needs to be public and return void. Also, the only input parameter is a View object. Because you want to change the text in the TextView object, you'll need to add an ID so that you can refer to it. In the main.xml file, add the following property to the TextView entry:


Figure 13. Add callbacks for buttons in the main.xml file.

You then can use "view_text" to access the text display. In the method "my_method", you can get a reference to this text field with the line:

TextView tview = (TextView)findViewById(;

Figure 14. You need to add ID labels to interact with items in your program.

You then can reset the text to be "The button was clicked" with:

tview.setText("The button was clicked");

When you click Run, your program will be recompiled, re-installed and opened. Now you can see what happens when you click on the added button.

Figure 15. The actual callback code goes into

Figure 16. Before pressing the button.

Figure 17. After pressing the button.

Figure 18. There are lots of functions in the menu not covered here.

Figure 19. The premium version adds even more capabilities.

I've provided only a short introduction to AIDE and all of its super powers here. This article hasn't looked at more than the most basic features of an Android application. Lots of tutorials exist to get you up to speed in Android development, and now you can run through those tutorials on the go.


Joey Bernard has a background in both physics and computer science. This serves him well in his day job as a computational research consultant at the University of New Brunswick. He also teaches computational physics and parallel programming.


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