OnLongClickListener on childView disables OnTouchListener on parentView

Question

Hey

I have an AbsoluteLayout which has an OnTouchListener. Inside this layout there is a much smaller LinearLayout positioned dynamically. The OnTouchListener works as expected.

Now the problem comes when I add a LongClickListener to my LinearLayout. That disables my OnTouchListener if the touch hits the LinearLayout but it is still triggered, if the LinearLayout was not hit by the touch.

My listeners:

// listener on parent (AbsoluteLayout)
setOnTouchListener(new OnTouchListener() {
    @Override
    public boolean onTouch(View v, MotionEvent event) {
        Log.e("LOOOOGING");
        mLinearLayout.getHitRect(mNoteRect);
        mNoteRect.left += mX;
        mNoteRect.top += mY;
        mNoteRect.right = mNoteRect.left + mLinearLayout.getWidth();
        mNoteRect.bottom = mNoteRect.top + mLinearLayout.getHeight();
        if (mNoteRect.contains((int) event.getX(), (int) event.getY())) {
            if (event.getAction() == MotionEvent.ACTION_DOWN) {
                mStartX = (int) event.getX() - mNoteRect.left;
                mStartY = (int) event.getY() - mNoteRect.top;
                return true;
            }
            mX = (int) event.getX() - mStartX;
            mY = (int) event.getY() - mStartY;

            setPadding(mX, mY, 0, 0);
            return true;
        }
        return false;
    }
});

// listener on child (LinearLayout)
mLinearLayout.setOnLongClickListener(new OnLongClickListener() {
    @Override
    public boolean onLongClick(View v) {
        // do something...
        return true;
    }
});

How can I delegate the touch on the LinearLayout where the OnLongClickListener is registered, to the parent?

Answer 1

Have you tried something like this?

   // listener on child (LinearLayout)
mLinearLayout.setOnLongClickListener(new OnLongClickListener() {
    @Override
    public boolean onLongClick(View v) {
        AbsoluteLayout.requestFocus();
        //do something else
        return true;
    }
});

From what I've read, touch is equivalent to gaining focus. (handling UI events)

edit: checking the absoluteLayout documentation, maybe this could help: dispatchTouchEvent(MotionEvent ev). Try playing with it, sounds like launching it from the public boolean onLongClick(View v) could help

Pass the touch screen motion event down to the target view, or this view if it is the target.

Answer 2

I had to build my own longclick behavior inside my ontouchlistener

private Handler mLongPressHandler = new Handler();

public final Runnable mDoLongPress = new Runnable() {
    public void run() {
        // do something
    }
};

setOnTouchListener(new OnTouchListener() {
    @Override
    public boolean onTouch(View v, MotionEvent event) {
        mLinearLayout.getHitRect(mNoteRect);
        mNoteRect.left += mX;
        mNoteRect.top += mY;
        mNoteRect.right = mNoteRect.left + mLinearLayout.getWidth();
        mNoteRect.bottom = mNoteRect.top + mLinearLayout.getHeight();
        if (mNoteRect.contains((int) event.getX(), (int) event.getY())) {
            if (event.getAction() == MotionEvent.ACTION_DOWN) {
                mStartRawX = (int) event.getX();
                mStartRawY = (int) event.getY();
                mStartX = mStartRawX - mNoteRect.left;
                mStartY = mStartRawY - mNoteRect.top;
                mLongPressHandler.postDelayed(mDoLongPress, 1000);
                return true;
            }
            mX = (int) event.getX() - mStartX;
            mY = (int) event.getY() - mStartY;
            if (event.getAction() == MotionEvent.ACTION_MOVE) {
                if ((mStartRawX + 10 < (int) event.getX() || mStartRawX - 10 > (int) event.getX())
                        || (mStartRawY + 10 < (int) event.getY() || mStartRawY - 10 > (int) event.getY())) {
                    mLongPressHandler.removeCallbacks(mDoLongPress);
                }
            }
            if (event.getAction() == MotionEvent.ACTION_UP) {
                mLongPressHandler.removeCallbacks(mDoLongPress);
            }

            setPadding(mX, mY, 0, 0);
            return true;
        }
        return false;
    }
});