CODEWITHSUNDEEP
android
drod
drod

Reputation: 369

android gallery no scroll on click

By default it seems, when a gallery item is clicked, the gallery automatically scrolls to center the item that was clicked. How can I override this behavior? I do not want the gallery to scroll to center when clicked, I want it to stay where it is.

Upvotes: 4

Views: 2786

Answers (6)

Potluck Mittal
Potluck Mittal

Reputation: 83

Unfortunately I don't seem to have the ability to comment on others' posts yet, but for any who found this question but was having issues, note that if you are creating a custom gallery that overrides the onSingleTap method (as suggested by Ohgema), you need to override the constructor that takes a Context and an AttributeSet.

Upvotes: 0

Ohgema
Ohgema

Reputation: 104

I think this is a correct solution:

    @Override
public boolean onSingleTapUp(final MotionEvent e) {     
    boolean handled = super.onSingleTapUp(e);
    onDown(e);

    return handled;
}

Upvotes: 8

Tomasz
Tomasz

Reputation: 3466

I think this is what you are looking for.

First create a class that extends from Gallery and then override the onSingleTapUp method:

@Override
public boolean onSingleTapUp(final MotionEvent e) {
    final OnItemClickListener listener = getOnItemClickListener();
    final View selectedView = getSelectedView();

    final float tapX = e.getRawX();
    final float tapY = e.getRawY();

    if ((selectedView != null) && (listener != null)
            && (tapX >= selectedView.getLeft()) && (tapX <= selectedView.getRight())
            && (tapY >= selectedView.getTop()) && (tapY <= selectedView.getBottom())) {

        final int selectedPosition = getSelectedItemPosition();

        listener.onItemClick(this, selectedView, selectedPosition, selectedPosition);
    }

    return true;
}

Upvotes: 2

Knickedi
Knickedi

Reputation: 8787

I never used a gallery before (actually i had to watch a youtube view to see it's visual effect first ;-)

So i digged in the source code of gallery and it seems to me that they have tied the selection quite heavy to the positioning, so you would have to override the class and do some heavy code hacking, maybe even reflection, to reach your goal. I can't even tell whether you would succeed.

This is not a solution, but a hint what you should expect if you want to realize that ;-)

Upvotes: 1

Noel
Noel

Reputation: 7410

I haven't tried this... but you can try the following:

In the onItemClickListener.onItemClick(), determine the currently selected position using Gallery.getSelectedItemPosition() and then set the position using Gallery.setSelection(int position). I don't know if this will work or not but you can give it a shot.

There is also the OnItemSelectedListener which you could try leveraging.

Upvotes: 0

coder_For_Life22
coder_For_Life22

Reputation: 26971

Gallery has a method to override this.

 gallery.setOnItemClickListener(new OnItemClickListener() {
    public void onItemClick(AdapterView parent, View v, int position, long id) {
        Toast.makeText(HelloGallery.this, "" + position, Toast.LENGTH_SHORT).show();
    }
});

}

Upvotes: 0

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