android - 如何在可搜索微调器中使用 SearchView.OnQueryTextListener()？

Question

我正在使用第三方库创建一个可搜索的微调器。我在我的应用程序中添加了库类(SearchableListDialog、SearchableSpinner)。一切正常，但我仍然面临一个问题，例如，在搜索 View 小部件中，如果我搜索 Abc，我没有将结果过滤为 Abc，但是当单击 ListView 项目时，结果显示项目为美国广播公司这就像项目的位置发生了变化，但列表没有显示可搜索的结果。我不知道我哪里错了。我多次修改代码，但没有得到理想的结果。

可搜索的微调器 xml 代码:

 <com.example.my.currencyconverterapp.activity.SearchableSpinner
                    android:id="@+id/spinner"
                    android:layout_below="@+id/rl_currency_converterted_data"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content" />  

这是我的 Fragment 代码，我在其中设置了可搜索微调器的适配器。

countriesCustomAdapterInr = new CountriesCustomAdapterInr(getActivity(), R.layout.custom_spinner_items, arrayList,res);
        spinner.setAdapter(countriesCustomAdapterInr);
        assert spinner != null;
        spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
                Toast.makeText(getActivity(), ""+arrayList.get(i).getFull_name()+i, Toast.LENGTH_LONG).show();
            }

            @Override
            public void onNothingSelected(AdapterView<?> adapterView) {}
        });  

这是第三方 SearchableSpinner 类:

public class SearchableSpinner extends android.support.v7.widget.AppCompatSpinner implements View.OnTouchListener,
        SearchableListDialog.SearchableItem {

    public static final int NO_ITEM_SELECTED = -1;
    private Context _context;
    private List _items;
    private SearchableListDialog _searchableListDialog;

    private boolean _isDirty;
    private ArrayAdapter _arrayAdapter;
    private String _strHintText;
    private boolean _isFromInit;

    public SearchableSpinner(Context context) {
        super(context);
        this._context = context;
        init();
    }

    public SearchableSpinner(Context context, AttributeSet attrs) {
        super(context, attrs);
        this._context = context;
        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.SearchableSpinner);
        final int N = a.getIndexCount();
        for (int i = 0; i < N; ++i) {
            int attr = a.getIndex(i);
            if (attr == R.styleable.SearchableSpinner_hintText) {
                _strHintText = a.getString(attr);
            }
        }
        a.recycle();
        init();
    }

    public SearchableSpinner(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        this._context = context;
        init();
    }

    private void init() {
        _items = new ArrayList();
        _searchableListDialog = SearchableListDialog.newInstance
                (_items);
        _searchableListDialog.setOnSearchableItemClickListener(this);
        setOnTouchListener(this);

        _arrayAdapter = (ArrayAdapter) getAdapter();
        if (!TextUtils.isEmpty(_strHintText)) {
            ArrayAdapter arrayAdapter = new ArrayAdapter(_context, android.R.layout
                    .simple_list_item_1, new String[]{_strHintText});
            _isFromInit = true;
            setAdapter(arrayAdapter);
        }
    }

    @Override
    public boolean onTouch(View v, MotionEvent event) {
        if (event.getAction() == MotionEvent.ACTION_UP) {

            if (null != _arrayAdapter) {

                // Refresh content #6
                // Change Start
                // Description: The items were only set initially, not reloading the data in the
                // spinner every time it is loaded with items in the adapter.
                _items.clear();
                for (int i = 0; i < _arrayAdapter.getCount(); i++) {
                    _items.add(_arrayAdapter.getItem(i));
                }
                // Change end.

                _searchableListDialog.show(scanForActivity(_context).getFragmentManager(), "TAG");
            }
        }
        return true;
    }

    @Override
    public void setAdapter(SpinnerAdapter adapter) {

        if (!_isFromInit) {
            _arrayAdapter = (ArrayAdapter) adapter;
            if (!TextUtils.isEmpty(_strHintText) && !_isDirty) {
                ArrayAdapter arrayAdapter = new ArrayAdapter(_context, android.R.layout
                        .simple_list_item_1, new String[]{_strHintText});
                super.setAdapter(arrayAdapter);
            } else {
                super.setAdapter(adapter);
            }

        } else {
            _isFromInit = false;
            super.setAdapter(adapter);
        }
    }

    @Override
    public void onSearchableItemClicked(Object item, int position) {
        setSelection(_items.indexOf(item));

        if (!_isDirty) {
            _isDirty = true;
            setAdapter(_arrayAdapter);
            setSelection(_items.indexOf(item));
        }
    }

    public void setTitle(String strTitle) {
        _searchableListDialog.setTitle(strTitle);
    }

    public void setPositiveButton(String strPositiveButtonText) {
        _searchableListDialog.setPositiveButton(strPositiveButtonText);
    }

    public void setPositiveButton(String strPositiveButtonText, DialogInterface.OnClickListener onClickListener) {
        _searchableListDialog.setPositiveButton(strPositiveButtonText, onClickListener);
    }

    public void setOnSearchTextChangedListener(SearchableListDialog.OnSearchTextChanged onSearchTextChanged) {
        _searchableListDialog.setOnSearchTextChangedListener(onSearchTextChanged);
    }

    private Activity scanForActivity(Context cont) {
        if (cont == null)
            return null;
        else if (cont instanceof Activity)
            return (Activity) cont;
        else if (cont instanceof ContextWrapper)
            return scanForActivity(((ContextWrapper) cont).getBaseContext());

        return null;
    }

    @Override
    public int getSelectedItemPosition() {
        if (!TextUtils.isEmpty(_strHintText) && !_isDirty) {
            return NO_ITEM_SELECTED;
        } else {
            return super.getSelectedItemPosition();
        }
    }

    @Override
    public Object getSelectedItem() {
        if (!TextUtils.isEmpty(_strHintText) && !_isDirty) {
            return null;
        } else {
            return super.getSelectedItem();
        }
    }
}  

这是第三方 SearchableListDialog 类:

public class SearchableListDialog extends DialogFragment implements
        SearchView.OnQueryTextListener, SearchView.OnCloseListener {

    private static final String ITEMS = "items";

    private CountriesCustomAdapterInr listAdapter;

    private ListView _listViewItems;

    private SearchableItem _searchableItem;

    private OnSearchTextChanged _onSearchTextChanged;

    private SearchView _searchView;

    private String _strTitle;

    private String _strPositiveButtonText;

    private DialogInterface.OnClickListener _onClickListener;

    public SearchableListDialog() {

    }

    public static SearchableListDialog newInstance(List items) {
        SearchableListDialog multiSelectExpandableFragment = new
                SearchableListDialog();

        Bundle args = new Bundle();
        args.putSerializable(ITEMS, (Serializable) items);

        multiSelectExpandableFragment.setArguments(args);

        return multiSelectExpandableFragment;
    }

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

    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        getDialog().getWindow().setSoftInputMode(WindowManager.LayoutParams
                .SOFT_INPUT_STATE_HIDDEN);
        return super.onCreateView(inflater, container, savedInstanceState);
    }

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {

        // Getting the layout inflater to inflate the view in an alert dialog.
        LayoutInflater inflater = LayoutInflater.from(getActivity());

        // Crash on orientation change #7
        // Change Start
        // Description: As the instance was re initializing to null on rotating the device,
        // getting the instance from the saved instance
        if (null != savedInstanceState) {
            _searchableItem = (SearchableItem) savedInstanceState.getSerializable("item");
        }
        // Change End

        View rootView = inflater.inflate(R.layout.searchable_list_dialog, null);
        setData(rootView);

        AlertDialog.Builder alertDialog = new AlertDialog.Builder(getActivity());
        alertDialog.setView(rootView);

        String strPositiveButton = _strPositiveButtonText == null ? "CLOSE" : _strPositiveButtonText;
        alertDialog.setPositiveButton(strPositiveButton, _onClickListener);

//        String strTitle = _strTitle == null ? "Select Country" : _strTitle;
//        alertDialog.setTitle(strTitle);

        final AlertDialog dialog = alertDialog.create();
        dialog.getWindow().setSoftInputMode(WindowManager.LayoutParams
                .SOFT_INPUT_STATE_HIDDEN);
        return dialog;
    }

    // Crash on orientation change #7
    // Change Start
    // Description: Saving the instance of searchable item instance.
    @Override
    public void onSaveInstanceState(Bundle outState) {
        outState.putSerializable("item", _searchableItem);
        super.onSaveInstanceState(outState);
    }
    // Change End

    public void setTitle(String strTitle) {
        _strTitle = strTitle;
    }

    public void setPositiveButton(String strPositiveButtonText) {
        _strPositiveButtonText = strPositiveButtonText;
    }

    public void setPositiveButton(String strPositiveButtonText, DialogInterface.OnClickListener onClickListener) {
        _strPositiveButtonText = strPositiveButtonText;
        _onClickListener = onClickListener;
    }

    public void setOnSearchableItemClickListener(SearchableItem searchableItem) {
        this._searchableItem = searchableItem;
    }

    public void setOnSearchTextChangedListener(OnSearchTextChanged onSearchTextChanged) {
        this._onSearchTextChanged = onSearchTextChanged;
    }

    private void setData(View rootView) {
        SearchManager searchManager = (SearchManager) getActivity().getSystemService(Context.SEARCH_SERVICE);

        _searchView = (SearchView) rootView.findViewById(R.id.search);
        _searchView.setSearchableInfo(searchManager.getSearchableInfo(getActivity().getComponentName
                ()));
        _searchView.setIconifiedByDefault(false);
        _searchView.setOnQueryTextListener(this);
        _searchView.setOnCloseListener(this);
        _searchView.setQueryHint("Search Country");
        _searchView.clearFocus();
        InputMethodManager mgr = (InputMethodManager) getActivity().getSystemService(Context.INPUT_METHOD_SERVICE);
        mgr.hideSoftInputFromWindow(_searchView.getWindowToken(), 0);


        List items = (List) getArguments().getSerializable(ITEMS);

        _listViewItems = (ListView) rootView.findViewById(R.id.listItems);

        //create the adapter by passing your ArrayList data
//        listAdapter = new ArrayAdapter(getActivity(), android.R.layout.simple_list_item_1, items);
listAdapter = new CountriesCustomAdapterInr(getActivity(), R.layout.custom_spinner_items, arrayList, getResources());
//

        //attach the adapter to the list
        _listViewItems.setAdapter(listAdapter);

        _listViewItems.setTextFilterEnabled(true);

        _listViewItems.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                _searchableItem.onSearchableItemClicked(listAdapter.getItem(position), position);
                getDialog().dismiss();
            }
        });
    }

    @Override
    public boolean onClose() {
        return false;
    }

    @Override
    public boolean onQueryTextSubmit(String s) {
        _searchView.clearFocus();
        return true;
    }

    @Override
    public boolean onQueryTextChange(String s) {
//        listAdapter.filterData(s);
        if (TextUtils.isEmpty(s)) {
//                _listViewItems.clearTextFilter();
            ((ArrayAdapter) _listViewItems.getAdapter()).getFilter().filter(null);
        } else {
            ((ArrayAdapter) _listViewItems.getAdapter()).getFilter().filter(s);
        }
        if (null != _onSearchTextChanged) {
            _onSearchTextChanged.onSearchTextChanged(s);
        }
        return true;
    }

    public interface SearchableItem<T> extends Serializable {
        void onSearchableItemClicked(T item, int position);
    }

    public interface OnSearchTextChanged {
        void onSearchTextChanged(String strText);
    }
}  

此处 OnQueryTextListener() 无法正常工作。请帮我。我试过但没有任何解决方案。谁能帮帮我吗。上面，我已经提到了我的查询。谢谢

Answer 1

我建议您使用 ListView 和 SearchView 来实现此目的，而不是将 Spinner 与 SearchView 一起使用，我尝试过并且效果很好。

在您的 Activity 上放置一个按钮。现在单击此按钮将打开一个自定义对话框。

你的 custom_dialog.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <android.support.v7.widget.SearchView
        android:id="@+id/searchView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <ListView
        android:id="@+id/listView"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" />

</LinearLayout>

然后设置按钮的 onClick 事件并执行以下操作。

 @Override
            public void onClick(View view) {
                Dialog dialog = new Dialog(SearchText.this);
                LayoutInflater inflater = LayoutInflater.from(SearchText.this);
                View view1 = inflater.inflate(R.layout.custom_search_layout, null);
                ListView listView = view1.findViewById(R.id.listView);
                SearchView searchView = view1.findViewById(R.id.searchView);

                final ArrayAdapter<String> stringArrayAdapter = new ArrayAdapter<String>(SearchText.this, android.R.layout.simple_list_item_1, getResources().getStringArray(R.array.my_currency));
                listView.setAdapter(stringArrayAdapter);

                searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
                    @Override
                    public boolean onQueryTextSubmit(String newText) {
                        return false;
                    }

                    @Override
                    public boolean onQueryTextChange(String newText) {
                        stringArrayAdapter.getFilter().filter(newText);
                        return false;
                    }
                });
                dialog.setContentView(view1);
                dialog.show();
            }

现在进行搜索，并在 ListView 中添加 OnItemClickListener，然后在选择后执行任何操作。