Question

I’m pretty new to Android but I have some experience (and a bit rusty with) Java and OOP.

Basically what my app does is when you press a button, led’s or “images” will flash.

I’m trying to divide up my project into multiple files where I can just import a java file to use the class’s functions but I’m unsure on how to do that…

I have two files. 1) HelloFormStuff.java (this is like the main one), and 2) led_functions.java

In HelloFormStuff I put:

import com.example.helloformstuff.led_functions
// com.example.helloformstuff is the package

Example of code.. HelloFormStuff.java

    public class HelloFormStuff extends Activity {

/* Called when the activity is first created. */
@Override
    public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    final Button btn1 = (Button) findViewById(R.id.btn1);
    btn1.setOnClickListener(new OnClickListener() {
        public void onClick(View v) {
            // Perform action on clicks
            currentMode.setText("Button 1 Pressed");
            led_circleBusy();
           }
    });
}

}

And in led_functions.java…

public class led_functions extends Activity{

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    final ImageView LED_1;
    LED_1 = (ImageView)findViewById(R.id.LED_1);

   @Override 
    public void led_circleBusy()
    {
        LED_1.setVisibility(View.INVISIBLE);

    }

}

An error I get is: The method led_circleBusy() is undefined for the type new View.OnClickListener(){}

So I’m asking is how to implement my other functions from other files.

Thanks.

-Paul

PS: I’ve been looking at sample code and if you’re wondering why I put something like an “@Override” where it’s not needed, just ignore it.. I’ve been trying random things :l

Answer 1

You can do the following from your HelloFormStuff class.

led_functions led = new led_functions();
led.led_circleBusy();

Then get rid of the @Override from above the led_circleBusy() method. You shouldn’t really be calling other Activity’s methods like that though. Is led_functions really an Activity/UI class? If not, remove the extends Activity, add LED_1 to HelloFormStuff and then pass it as a parameter to led.led_circleBusy(ImageView led1).