CODEWITHSUNDEEP
androidevents
BnMcG
BnMcG

Reputation: 688

Android: Accessing Widget from Event Listener

In my Android application, I have an ImageView (in the onCreate method) with an onTouch listener attached like so:

    ball.setClickable(true);
    ball.setOnTouchListener(ballDragListener);

and the event listener:

View.OnTouchListener ballDragListener = new View.OnTouchListener() {
    @Override
    public boolean onTouch(View v, MotionEvent event) {
        RelativeLayout layout = (RelativeLayout)findViewById(R.id.pet_layout); // Reference to the already created layout
        int velocityX = 1;
        int velocityY = 1;

        int eventAction = event.getAction();
        int newX = (int)(event.getRawX());
        int newY = (int)(event.getRawY());

        v.setX(newX + velocityX);
        v.setY(newY + velocityY);
        //v.invalidate();
        return true;
    }

Say I declare a new TextView in the onCreate method:

    protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    TextView text = new TextView(this);

How would I access it from the event listener? Calling 'text.setText()' doesn't work, as it cannot find the object.

Edit: I would also like to be able to access the same instance of the TextView from my onCreate() method, and/or another method.

Regards, Ben.

Upvotes: 0

Views: 59

Answers (1)

Mattias Isegran Bergander
Mattias Isegran Bergander

Reputation: 11909

Either:

1)

Declare your textview as a field in your class like:

private TextView text;

And then just init it as you did now but without declaring it (you already did in your class as a field):

text = new TextView(this);

2)

Or just add a final modifier to it and do this a few lines before you create your listener:

final TextView text = ...

Upvotes: 1

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