public class SubscribeActivity extends SherlockFragmentActivity implements
		OnQueryTextListener, OnItemClickListener, OnItemLongClickListener {
	private SearchView mSearchView;
	private ListView mListView;
	private SubscribeIndexAdapter mAdapter;

	@Override
	public void onCreate(Bundle savedInstanceState) {
//...
		mAdapter = new SubscribeIndexAdapter(this, mSubcribeList);
		mSearchView = (SearchView) findViewById(R.id.search_view);
		mListView = mFooter.getListViewById(R.id.list_view);
		mListView.setAdapter(mAdapter);

		mListView.setTextFilterEnabled(true);
		mListView.setOnItemClickListener(this);
		mListView.setOnItemLongClickListener(this);

		setupSearchView();
//...
	}

	private void setupSearchView() {
		mSearchView.setIconifiedByDefault(false);
		mSearchView.setOnQueryTextListener(this);
		mSearchView.setSubmitButtonEnabled(false);
		mSearchView.setQueryHint("搜索");
	}

	public boolean onQueryTextChange(String newText) {
		if (TextUtils.isEmpty(newText)) {
			mListView.clearTextFilter();
		} else {
			mListView.setFilterText(newText.toString());
		}
		return true;
	}

	public boolean onQueryTextSubmit(String query) {
		return false;
	}
}

public class SubscribeIndexAdapter extends BaseAdapter implements Filterable {
	private LayoutInflater inflater;
	private ArrayList<Subscribe> mSubcribeList;
	private MyFilter mFilter;
	private ArrayList<Subscribe> mOriginalValues;
	private final Object mLock = new Object();

	static class ViewHolder {
		TextView textView;
		ImageView imageView;
		ImageView imageView2;
	}

	public SubscribeIndexAdapter(Context context,
			ArrayList<Subscribe> subcribeList) {
		mSubcribeList = subcribeList;
		inflater = LayoutInflater.from(context);
	}

	@Override
	public int getCount() {
		return mSubcribeList.size();
	}

	@Override
	public Object getItem(int position) {
		return mSubcribeList.get(position);
	}

	@Override
	public long getItemId(int position) {
		return position;
	}

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

		return convertView;
	}

	@Override
	public Filter getFilter() {
		if (mFilter == null) {
			mFilter = new MyFilter();
		}
		return mFilter;
	}

	class MyFilter extends Filter {

		@Override
		protected FilterResults performFiltering(CharSequence prefix) {
			FilterResults results = new FilterResults();

			if (mOriginalValues == null) {
				synchronized (mLock) {
					mOriginalValues = new ArrayList<Subscribe>(mSubcribeList);
				}
			}
			if (prefix == null || prefix.length() == 0) {
				synchronized (mLock) {
					ArrayList<Subscribe> list = new ArrayList<Subscribe>(
							mOriginalValues);
					results.values = list;
					results.count = list.size();
				}
			} else {
				String prefixString = prefix.toString().toLowerCase();

				final ArrayList<Subscribe> values = mOriginalValues;

				final int count = values.size();

				final ArrayList<Subscribe> newValues = new ArrayList<Subscribe>(
						count);

				for (Subscribe value : values) {
					String title = value.title.toLowerCase();

					if (title.indexOf(prefixString) != -1) {
						newValues.add(value);
					}
				}

				results.values = newValues;
				results.count = newValues.size();
			}

			return results;
		}

		@Override
		protected void publishResults(CharSequence constraint,
				FilterResults results) {
			mSubcribeList = (ArrayList<Subscribe>) results.values;

			if (results.count > 0) {
				notifyDataSetChanged();
			} else {
				notifyDataSetInvalidated();
			}
		}

	}
}

Gammatone 滤波器的 Python 代码实现