Simple array example mini-app

Let's make a simple working array example. You can get the completed code for this example in the downloadable code bundle. It's at Chapter 15/Simple Array Example/MainActivity.java.

Create a project using the Empty Activity template and call it Simple Array Example.

First, we declare our array, allocate five spaces, and initialize values for each of the elements. Then we output each of the values to the logcat console. Add this code to the onCreate method just after the call to setContentView:

// Declaring an array
int[] ourArray;
// Allocate memory for a maximum size of 5 elements
ourArray = new int[5];
// Initialize ourArray with values
// The values are arbitrary, but they must be int
// The indexes are not arbitrary. 0 through 4 or crash!
ourArray[0] = 25;
ourArray[1] = 50;
ourArray[2] = 125;
ourArray[3] = 68;
ourArray[4] = 47;
//Output all the stored values
Log.i("info", "Here is ourArray:");
Log.i("info...