在Listview上实现Filter多次android

Question

我能够成功实现listview上的过滤器，当我点击该项目时，listview中的过滤项目可以在edittext中显示。现在，问题是一旦文本被过滤并且所选项目在edittext中显示，则过滤器不适用于我在edittext中输入的第二个单词。怎么做？

示例：如果我在edittext 中写汞， listview将包含汞作为选项。现在 Edittext有水银金星作为文字，我希望列表在金星上过滤，而水银已经存在在edittext中。

这是我正在使用的代码。

MainActivity.java

public class MainActivity extends AppCompatActivity {

    // The data to show
    List<Planet> planetsList = new ArrayList<Planet>();
    PlanetAdapter aAdpt;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        initList();

        // We get the ListView component from the layout
        ListView lv = (ListView) findViewById(R.id.listView);

        final EditText editTxt = (EditText) findViewById(R.id.editTxt);

        aAdpt = new PlanetAdapter(planetsList, this);
        lv.setAdapter(aAdpt);

        // React to user clicks on item
        lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {

            public void onItemClick(AdapterView<?> parentAdapter, View view, int position,
                                    long id) {


                editTxt.setText(((TextView) view.findViewById(R.id.name)).getText().toString());
            }
        });

        // we register for the contextmneu
        registerForContextMenu(lv);

        // TextFilter
        lv.setTextFilterEnabled(true);

        editTxt.addTextChangedListener(new TextWatcher() {

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
                if (count < before) {
                    // We're deleting char so we need to reset the adapter data
                    aAdpt.resetData();
                }

                aAdpt.getFilter().filter(s.toString());

            }

            @Override
            public void beforeTextChanged(CharSequence s, int start, int count,
                                          int after) {

            }

            @Override
            public void afterTextChanged(Editable s) {
            }
        });
    }

    private void initList() {
        // We populate the planets

        planetsList.add(new Planet("Mercury", 10));
        planetsList.add(new Planet("Venus", 20));
        planetsList.add(new Planet("Mars", 30));
        planetsList.add(new Planet("Jupiter", 40));
        planetsList.add(new Planet("Saturn", 50));
        planetsList.add(new Planet("Uranus", 60));
        planetsList.add(new Planet("Neptune", 70));


    }
}

适配器类

public class PlanetAdapter extends ArrayAdapter<Planet> implements Filterable {

    private List<Planet> planetList;
    private Context context;
    private Filter planetFilter;
    private List<Planet> origPlanetList;

    public PlanetAdapter(List<Planet> planetList, Context ctx) {
        super(ctx, R.layout.img_row_layout, planetList);
        this.planetList = planetList;
        this.context = ctx;
        this.origPlanetList = planetList;
    }

    public int getCount() {
        return planetList.size();
    }

    public Planet getItem(int position) {
        return planetList.get(position);
    }

    public long getItemId(int position) {
        return planetList.get(position).hashCode();
    }

    public View getView(int position, View convertView, ViewGroup parent) {
        View v = convertView;

        PlanetHolder holder = new PlanetHolder();

        // First let's verify the convertView is not null
        if (convertView == null) {
            // This a new view we inflate the new layout
            LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            v = inflater.inflate(R.layout.img_row_layout, null);
            // Now we can fill the layout with the right values
            TextView tv = (TextView) v.findViewById(R.id.name);
            TextView distView = (TextView) v.findViewById(R.id.dist);


            holder.planetNameView = tv;
            holder.distView = distView;

            v.setTag(holder);
        }
        else 
            holder = (PlanetHolder) v.getTag();

        Planet p = planetList.get(position);
        holder.planetNameView.setText(p.getName());
        holder.distView.setText("" + p.getDistance());


        return v;
    }

    public void resetData() {
        planetList = origPlanetList;
    }


    private static class PlanetHolder {
        public TextView planetNameView;
        public TextView distView;
    }



    @Override
    public Filter getFilter() {
        if (planetFilter == null)
            planetFilter = new PlanetFilter();

        return planetFilter;
    }



    private class PlanetFilter extends Filter {



        @Override
        protected FilterResults performFiltering(CharSequence constraint) {
            FilterResults results = new FilterResults();
            // We implement here the filter logic
            if (constraint == null || constraint.length() == 0) {
                // No filter implemented we return all the list
                results.values = origPlanetList;
                results.count = origPlanetList.size();
            }
            else {
                // We perform filtering operation
                List<Planet> nPlanetList = new ArrayList<Planet>();

                for (Planet p : planetList) {
                    if (p.getName().toUpperCase().startsWith(constraint.toString().toUpperCase()))
                        nPlanetList.add(p);
                }

                results.values = nPlanetList;
                results.count = nPlanetList.size();

            }
            return results;
        }

        @Override
        protected void publishResults(CharSequence constraint,
                FilterResults results) {

            // Now we have to inform the adapter about the new list filtered
            if (results.count == 0)
                notifyDataSetInvalidated();
            else {
                planetList = (List<Planet>) results.values;
                notifyDataSetChanged();
            }

        }

    }
}