Josh Dobbs wrote:
> This is what i have
> that seems to work but i have to create a new listener for each
> button(currently i only have one as you see below)
> I couldnt get your method to work. can you tell me what im doing wrong?
<snip>
> btn1.setOnClickListener(new View.OnClickListener() {
> public void onClick(View view) {
>
> }
>
> });
Here, you are creating an anonymous inner class (the new
View.OnClickListener() stuff). That's fine, but if you want to use the
same anonymous inner class instance, you'll need to hang onto it.
One approach for this is to assign it to a member variable in the outer
class:
View.OnClickListener hitMe=new View.OnClickListener() {
public void onClick(View view) {
// something
}
};
Then, you can use that same listener object for each of your buttons:
btn1.setOnClickListener(hitMe);
btn2.setOnClickListener(hitMe);
Another approach is to make the inner class not anonymous, making it a
named inner class:
public class PegLites extends Activity {
// other stuff here
class ButtonListener implements View.OnClickListener {
public void onClick(View view) {
// something
}
}
}
Then, you can create new listener objects per button, but they would
share the same implementation of onClick():
btn1.setOnClickListener(new ButtonListener());
btn2.setOnClickListener(new ButtonListener());
For a pure listener implementing an interface, as in this case, either
approach should work and be safe, since the listener holds no state. If
there is a chance the listener will hold some state, though, you are
better served going with the named inner class approach, so each button
can have its own listener with its own state.
--
Mark Murphy (a Commons Guy)
http://commonsware.com
_The Busy Coder's Guide to Android Development_ Version 1.9 Published!
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