Let's make a really simple working array example. You can get the completed code for this example in the downloadable code bundle. It's at Chapter 13/Simple Array Example/MainActivity.java.
Create a project with a blank Activity and call it Simple Array Example.
First, we declare our array, allocate five spaces, and initialize values to 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 as long as they are 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", "[0] = " + ourArray[0]);
Log.i("info", "[1] ...