如何在android中的自定义listview中应用过滤器？

在我的android应用程序中，我想在listview上应用一个过滤器。列表的每一行显示联系人姓名、联系人号码类型、联系人号码等。 如何在列表上应用过滤器，以便在编辑文本中输入人员姓名时，必须在文本更改时刷新列表视图？我正在使用另一个类填充列表

这是我的代码。

AllContactsActivity类从手机中检索联系人

public class AllContactsActivity extends ListActivity implements
            android.view.View.OnClickListener, OnItemClickListener {
        EditText sc;
        String name, phonetype;
        ImageButton favourites, contacts, keypad, recent, about;
        int arr, key;
        Cursor tcur;
        int[] typecount, count, id;
        ListView lv;
        ListViewAdapterContacts lva;
        String[] names, numbers, typeinfo, contactinfo, types;
        Integer[] sortlist;
        TreeMap<Integer, String> sorted_set;
        LinkedHashMap<Integer, String> sortedMap;
        ContentResolver tcr;
        HashMap<Integer, String> numbhashmap;
        ArrayAdapter<String> adapter = null;

        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);

            LayoutParams params = new RelativeLayout.LayoutParams(
                    LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
            LinearLayout mainLayout = new LinearLayout(this);
            mainLayout.setOrientation(LinearLayout.VERTICAL);
            LayoutInflater layoutInflater = getLayoutInflater();
            mainLayout.addView(layoutInflater.inflate(R.layout.allcontacts, null));
            mainLayout.addView(layoutInflater.inflate(R.layout.allbuttons, null));
            this.addContentView(mainLayout, params);

            //configureBottomMenu();
            getphones();//get the cantact number
            getContacts();//get contact name,type,id
    //names,types,number,id are populated by above two methods.

            lv = new ListView(getApplicationContext());
            lv = (ListView) findViewById(android.R.id.list);
    //ListViewAdapterContacts class is specified later in the code which populate the list view

            lva = new ListViewAdapterContacts(this, names, types, numbers, id);


            lv.setAdapter(lva);
            lv.setTextFilterEnabled(true);
            lv.setOnItemClickListener(this);

            sc=(EditText)findViewById(R.id.searchcontact);
            sc.addTextChangedListener(textwatcher);


        }// on create
        @Override
        protected void onDestroy() {
            super.onDestroy();
            sc.removeTextChangedListener(textwatcher);
        }

        private TextWatcher textwatcher = new TextWatcher() {

            public void onTextChanged(CharSequence s, int start, int before, int count) {
                // TODO Auto-generated method stub

            }

            public void beforeTextChanged(CharSequence s, int start, int count,
                    int after) {
                // TODO Auto-generated method stub

            }

            public void afterTextChanged(Editable s) {
                // TODO Auto-generated method stub
                AllContactsActivity.this.lva.getFilter().filter(s.toString());
                lva.notifyDataSetChanged();

            }
        };


    }

重写getFilter（）并将其放入：

public Filter getFilter() {
  return new MyCustomFilter();
}

当然，您必须创建自定义过滤器

private class MyCustomFilter extends Filter {
  @Override
  protected FilterResults performFiltering(CharSequence prefix) {
    FilterResults results = new FilterResults();
    // perform your filtering. you'll need to create a new List to get the correct filtered results. then
    results.values = (your new List);
    results.count = (your new List).size();

    return results;
  @Override
  protected void publishResults(CharSequence constraint, FilterResults results) {
    List filtered = (ArrayList)results.values;
      // set the data of your adapter here

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

重写getFilter（）并将其放入：

public Filter getFilter() {
  return new MyCustomFilter();
}

当然，您必须创建自定义过滤器

private class MyCustomFilter extends Filter {
  @Override
  protected FilterResults performFiltering(CharSequence prefix) {
    FilterResults results = new FilterResults();
    // perform your filtering. you'll need to create a new List to get the correct filtered results. then
    results.values = (your new List);
    results.count = (your new List).size();

    return results;
  @Override
  protected void publishResults(CharSequence constraint, FilterResults results) {
    List filtered = (ArrayList)results.values;
      // set the data of your adapter here

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

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我无法理解你所说的新列表的含义。我在这门课上没有任何列表，我只有数组。我需要把数组放到列表中吗？不，数组很好。但是我不确定是否可以将FilterResults返回数组。可能需要两步转换（FilterResults到arraylist，arraylist到arraylist），我应该在->results.values=（您的新列表）行中放置什么；results.count=（您的新列表）.size（）；我没有得到你。请详细说明。我发现非常有用。我无法理解你所说的新列表的含义。我在这门课上没有任何列表，我只有数组。我需要把数组放到列表中吗？不，数组很好。但是我不确定是否可以将FilterResults返回数组。可能需要两步转换（FilterResults到arraylist，arraylist到arraylist），我应该在->results.values=（您的新列表）行中放置什么；results.count=（您的新列表）.size（）；我没有得到你。请详细说明。我发现非常有用。