使用自定义listview_items过滤列表视图的搜索视图

Question

我的应用程序有一个自定义的ListView-Adapter，它可以将一个包含多个TextViews的listview_item扩展到一个ListView中。

我已经在布局中添加了一个SearchView，但我希望它能够搜索该ListView，并通过查看在SearchView中键入的数据是否与TextViews中来自listview_items的任何数据相同来对其进行过滤。

Answer 1

覆盖acitivity类中的OnQueryTextListener，如下所示：

@Override
public boolean onQueryTextChange(String newText) {
    mAdapter.getFilter().filter(newText);
    return true;
}

@Override
public boolean onQueryTextSubmit(String query) {
    mAdapter.getFilter().filter(query);
    return true;
}

在适配器内部，实现过滤器，如：

public Filter getFilter() {
    if (mFliter == null)
        mFliter = new CustomFilter();
    return mFliter;

}
    private class CustomFilter extends Filter {
        // called when adpater filter method is called
        @Override
        protected FilterResults performFiltering(CharSequence constraint) {
            constraint = constraint.toString().toLowerCase();
            FilterResults result = new FilterResults();
            if (constraint != null && constraint.toString().length() > 0) {
                ArrayList<CustomObject> filt = new ArrayList<CustomObject>(); //filtered list
                for (int i = 0; i < originalList.size(); i++) {
                    CustomObject m = originalList.get(i);
                    if (m.getName().toLowerCase().contains(constraint)) {
                        filt.add(m); //add only items which matches
                    }
                }
                result.count = filt.size();
                result.values = filt;
            } else { // return original list
                synchronized (this) { 
                    result.values = originalList;
                    result.count = originalList.size();
                }
            }
            return result;
        }

        @Override
        protected void publishResults(CharSequence constraint,
                FilterResults results) {
            if (results != null) {
                setList((ArrayList<CustomObject>) results.values); // notify data set changed
            } else {
                setList((ArrayList<CarObject>) originalList);
            }
        }
    }

    public void setList(ArrayList<CarObject> data) {
        mList = data; // set the adapter list to data
        YourAdapter.this.notifyDataSetChanged(); // notify data set change
    }