SearchView窗口小部件无法正常工作

Question

I am trying to filter my listview using searchview acitonbar widget, but when i type something in edittext a black box is appeared on screen. How to make search without that black box.

here is my code.

public class MainActivity extends ListActivity implements OnQueryTextListener{

    private Button favListBtn;
    private ListView mListView;


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

        String[] categories =  {"Food", "Cloth", "Shoes","Agriculture",
                                "Food", "Cloth", "Shoes","Agriculture",
                                "Food", "Cloth", "Shoes","Agriculture",
                                "Food", "Cloth", "Shoes","Agriculture",
                                "Food", "Cloth", "Shoes","Agriculture",
                                "Food", "Cloth", "Shoes","Agriculture",
                                "Food", "Cloth", "Shoes","Agriculture"};

        mListView = (ListView) findViewById(android.R.id.list);
        mListView = getListView();

        ArrayAdapter<String> mAdapte = new ArrayAdapter<String>(MainActivity.this, 
                android.R.layout.simple_list_item_1, categories);
        mListView.setAdapter(mAdapte);
        mListView.setTextFilterEnabled(true);

        mListView.setOnItemClickListener(new OnItemClickListener() {
            public void onItemClick(AdapterView<?> parent, View view,
                      int position, long id) {

                      new SearchAsynTask(MainActivity.this).execute();
                      // selected item 
                      String category = ((TextView) view).getText().toString();
                      Intent intent = new Intent(MainActivity.this, BusinessListActivity.class);
                      startActivity(intent);
                      Toast.makeText(MainActivity.this, category, Toast.LENGTH_LONG).show();
                      }
            });       
        }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {

        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        SearchManager searchManager = (SearchManager) getSystemService( Context.SEARCH_SERVICE );
        SearchView searchView = (SearchView) menu.findItem(R.id.action_search).getActionView();

        searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));
        searchView.setSubmitButtonEnabled(true);
        searchView.setOnQueryTextListener(this);

        return super.onCreateOptionsMenu(menu);

    }

    @Override
    public boolean onQueryTextSubmit(String query) {        

        return false;
    }

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

Answer 1

It is showing that black box because you set the list view to do so: mListView.setTextFilterEnabled(true);

EDIT: You said you couldn't make the search without the above line. It is because you are using text filtering for search purpose. This is not a good way. You are calling mListView.setFilterText(query.toString()); in onQueryTextChange() callback. So without enabling the text filtering, your search mechanism does not work.

The proper way is to make your ListView Adapter implement Filterable interface and handle the filtering there.

Then you should do the search on the Filter object: Filter.performFiltering(CharSequence)