[Solved] Listener doesn’t work..It seems the Listener is 0

Extension of my comment above:

You need to register the mListener somehow. A pattern to do this is:

public class MyHandler {

    private LoginListener mListener;

    public MyHandler(LoginListener listener) {
        mListener = listener;
    }

    // ... etc...
}

Where LoginListener is:

public interface LoginListener {
    public void onLoginSuccess();
}

And your activity has:

public MyActivity implements LoginListener {

    // instantiate the handler somewhere, with a reference
    // to "this". "this" refers to the LoginListener interface
    // which is implemented.
    @Override
    public void onCreate(Bundle b) {
        mHandler = new MyHandler(this);
    }

    @Override
    public void onLoginSuccess() {
        Log.i(TAG, "Kewel beanZ");
    }
}

Or, you can define LoginListener as an interface inside the activity if you wish, and instantiate it as:

public LoginListener mListener = new LoginListener() {
    @Override
    public void onLoginSuccess() {
        Log.i(TAG, "Sweet sweet baby beanz");
    }
};

And instead of using this, use mListener, when you create MyHandler.