This is where we code the ImageButtons click events. Open the Java source code from src/net.kerul.simplenumb3r5/SimpleNumb3r5.java. Here, we will be discussing the main activity class that will provide the screen navigation with the following code:
public class SimpleNumb3r5 extends Activity implements OnClickListener
The main class, as usual, will inherit the Activity class, and implement OnClickListener to enable the widget interaction.
The main variable declarations are as follows:
//initialize all widgets
private ImageView imagenumber;
private ImageButton btnprevious, btninfo, btnsound, btnnext;
//define variables to track screen number, start from 0
private int screennumber=0;
//define a sound controller
private MediaPlayer mp;
//define an array for the sound files
private String[] soundfile={"0.mp3","1.mp3","2.mp3","3.mp3",
"4.mp3","5.mp3","6.mp3","7.mp3"...