How to Handle Button Clicks ListFragment

问题

I was curious how best to handle button clicks, inside of a ListFragment with a custom adapter.

I have an onClickListener setup for the buttons, but I need to be able to get the item that it was clicked from, since it is within an item, here is the getView inside the custom adapter.

*/
    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        View view;

        if (convertView == null) {
            view = _inflater.inflate(R.layout.test_single_item, parent, false);
        } else {
            view = convertView;
        }

        TestItemModel item = getItem(position);
        ((TextView) view.findViewById(R.id.item_label)).setText(item.getName());
        ((TextView) view.findViewById(R.id.item_id)).setText(item.getId());
        ImageView image = (ImageView) view.findViewById(R.id.image_id);
        Resources resources = this.getContext().getResources();
        image.setImageDrawable(resources.getDrawable(R.drawable.ic_launcher));
        Button btn = (Button) view.findViewById(R.id.button_id);
        Button btn2 = (Button) view.findViewById(R.id.button_id_2);
        Button btn3 = (Button) view.findViewById(R.id.button_id_3);
        ol = new OnItemClickListener(position);
        btn.setOnClickListener(ol);
        btn.setTag(1);
        btn2.setOnClickListener(ol);
        btn2.setTag(2);
        btn3.setOnClickListener(ol);
        btn3.setTag(3);

        return view;
    }

as you can see I used tags to determine which button was clicked and the OnItemClickListener knows where the position is from the position at which is being called.

I am not sure about the best approach and how to go about doing this properly.

回答1:

Use a switch case as below

private OnClickListener mClickListener = new OnClickListener() {

            public void onClick(View v) {
                switch(v.getId())
                {
                case R.id.button_id :
                    // btn clicked
                            Toast.makeText(context," Button1 clicked at positon"+v.getTag(), Toast.LENGTH_SHORT).show();
                    break;
                case R.id.button_id2 :
                    // btn2 clicked   
                           Toast.makeText(context," Button2 clicked at positon"+v.getTag(), Toast.LENGTH_SHORT).show();
                    break;  
                case R.id.button_id3 :
                            Toast.makeText(context," Button3 clicked at positon"+v.getTag(), Toast.LENGTH_SHORT).show();  
                    // btn 3 clciked
                    break; 
                }

            }
        };

Use

btn.setOnClickListener(mClickListener);
btn.setTag(position);
btn2.setOnClickListener(mClickListener);
btn2.setTag(position);
btn3.setOnClickListener(mClickListener);
btn3.setTag(position);

Snap of example with two buttons

snap of button 1 clicked at position 0 ie first row

snap of button 2 clicked at position 1 ie second row

来源：https://stackoverflow.com/questions/19487253/how-to-handle-button-clicks-listfragment