Android：如何在列表视图中为动态创建的项目设置侦听器

Question

I have list view that populated its items based on a list of names. I've added an adapter to the list view and set items. Here's the code:

    items = new String[]{ "Apple", "Banana" };
    list = (ListView)findViewById(R.id.fruits_listView);

    list.setAdapter(new ArrayAdapter<String>(this, R.layout.list_fruits, R.id.list_fruits_textView, items) {

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {

            View v = super.getView(position, convertView, parent);
            ImageView imageView = (ImageView)v.findViewById(R.id.list_fruits_imageView);

            // Change icon based on name and set click listener for it
            String s = items[position];

            if (s.equals("Apple"))
            {
                imageView.setImageResource(R.drawable.apple);
                imageView.setOnClickListener(appleListener);
            }
            else if (s.equals("Banana"))
            {
                imageView.setImageResource(R.drawable.banana);
                imageView.setOnClickListener(bananaListener);
            }

            return v;
        }
    });

    // Setup listeners
    appleListener = new OnClickListener() {

        @Override
        public void onClick(View v) {
            startActivity(new Intent(this, Apple.class));
        }
    };

    bananaListener = new OnClickListener() {

        @Override
        public void onClick(View v) {
            startActivity(new Intent(this, Banana.class));
        }
    };

However when I click the list items nothing happens, seems listeners don't work. Any idea what my problem is?

Answer 1

It's simple, just initialize your listeners before setting the adapters.
I hope this solves your problem.

Set these properties in your ListView

android:focusable="false"
android:focusableInTouchMode="false"
android:descendantFocusability="blocksDescendants" 

Also make your ImageView(s) clickable:

yourImageViewObject.setClickable(true);