android - Android SearchView 上是否有任何监听器通知 SearchView 是否已展开并准备好接受输入？

Question

我想在用户未输入任何内容时在 SearchView 中显示一些默认建议。我正在使用矩阵光标手动设置我的自定义建议适配器。我尝试在 onFocusChange 和 onClickListner 中设置适配器，但建议隐藏在键盘后面，显然建议加载早于键盘。我没有找到任何监听器告诉我 searchview 在 View 中完全加载了键盘。帮助我找到正确的解决方案或任何解决方法。我已经尝试过 postDelayed 的解决方法，但体验并不顺畅。

我在 onCreateOptionsMenu 中有这段代码

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    menu.clear();
    final MenuInflater inflater = this.getMenuInflater();
    inflater.inflate(R.menu.searchview_in_menu, menu);
    this.menu=menu;
    basketProductCount = ShoppinglistDataSource.get(getContext()).getProductCountToOrder();
    if(basketProductCount>0 && menu!=null){
        this.activateBasket();
    }

    SearchManager manager = (SearchManager) getSystemService(SEARCH_SERVICE);
    MenuItem searchMenuItem = menu.findItem(R.id.action_search);
    mSearchView = (SearchView) searchMenuItem.getActionView();

    if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {

        int searchButtonId = mSearchView.getContext().getResources().getIdentifier("android:id/search_button", null, null);
        ImageView searchButton = (ImageView) mSearchView.findViewById(searchButtonId);
        if(searchButton!=null)
            searchButton.setImageResource(R.drawable.search);



        mSearchView.setSearchableInfo(manager.getSearchableInfo(new ComponentName(getApplicationContext(), SearchProductActivity.class)));
        mSearchView.setIconifiedByDefault(true);
        mSearchView.setIconified(true);
        mSearchView.setQueryHint("Search from 4000+ products");
        mSearchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {

            @Override
            public boolean onQueryTextSubmit(String s) {
                Log.d("SEARCH_VIEW_DEBUG","Inside onQueryTextSubmit for query: "+s);
                mSearchView.clearFocus();
                mSearchView.setIconified(true);
                //return false to let the SearchView perform the default action
                return false;
            }

            @Override
            public boolean onQueryTextChange(String query) {
                query = query.toLowerCase().trim();
                Log.d("Query changed to ",query);
                if (query.length() > 1) {
                    Bundle b = new Bundle();
                    b.putString("query",query);
                    if(getLoaderManager().getLoader(1)!=null)
                        getLoaderManager().restartLoader(1, b, suggestionLoaderCallback);
                    else
                        getLoaderManager().initLoader(1, b, suggestionLoaderCallback);
                }
                return true;
            }

        });

        mSearchView.setOnQueryTextFocusChangeListener(new SearchView.OnFocusChangeListener() {

            @Override
            public void onFocusChange(View view, boolean queryTextFocused) {
                Log.d("DEBUGGIN", "onFocusChange");
                if(!queryTextFocused) {
                    if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
                        mSearchView.onActionViewCollapsed();
                        mSearchView.clearFocus();
                    }
                } else {
                    /**This is doing the trick, but not smooth experience**/
              /**also suggestions may get behind the keyboard if keyboard takes time to pop up**/
                    view.postDelayed(new Runnable() {
                        @Override
                        public void run() {

                            if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
                                mSearchView.onActionViewExpanded();
                                Log.d("DEBUGGIN", "Inside expand");
                                if (mSearchView.getQuery().length() == 0) {

                                    Log.d("DEBUGGIN", "getting default suggestions");
                                    sug.clear();
                                    sug.add("Personal Care");
                                    sug.add("Oil");
                                    sug.add("Spices");
                                    sug.add("Breakfast");
                                    sug.add("Snacks");
                                    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
                                        String[] columns = new String[]{"_id", "text"};
                                        Object[] temp = new Object[]{0, "default"};
                                        final MatrixCursor cursor = new MatrixCursor(columns);
                                        int i = 0;
                                        for (i = 0; i < sug.size(); i++) {
                                            if (!sug.get(i).equals("")) {
                                                temp[0] = i;
                                                temp[1] = sug.get(i);
                                                cursor.addRow(temp);
                                            }
                                        }
                                        Log.d("Initial categories", sug.toString());
                                        mSearchView.setSuggestionsAdapter(new CustomSuggestionAdapter(ListAll.this, cursor, sug));
                                        mSearchView.getSuggestionsAdapter().notifyDataSetChanged();
                                        mSearchView.setOnSuggestionListener(new SearchView.OnSuggestionListener() {
                                            @Override
                                            public boolean onSuggestionSelect(int i) {
                                                Log.d("SEARCH_VIEW_DEBUG", "Inside onSuggestionSelect");



                                                return false;
                                            }

                                            @Override
                                            public boolean onSuggestionClick(int i) {
                                                Log.d("SEARCH_VIEW_DEBUG", "Inside onSuggestionClick");
                                                MatrixCursor cursor = (MatrixCursor) mSearchView.getSuggestionsAdapter().getItem(i);
                                                String suggest1 = cursor.getString(cursor
                                                        .getColumnIndex("text"));
                                                Log.d("Clicked Item", suggest1);
                                                mSearchView.setQuery(suggest1, true);
                                                return true;
                                            }
                                        });
                                    }
                                }
                            }

                        }
                    }, 600);
                }
            }
        });
    }

    if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
        searchMenuItem.setOnActionExpandListener(new MenuItem.OnActionExpandListener() {
            @Override
            public boolean onMenuItemActionExpand(MenuItem item) {
                /**This never gets called**/
                Log.d("DEBUGGIN", "Inside onMenuItemActionExpand");
                return true;
            }

            @Override
            public boolean onMenuItemActionCollapse(MenuItem item) {
                /**This never gets called**/
                Log.d("DEBUGGIN", "Inside onMenuItemActionCollapse");
                return true;
            }
        });
    } else {
        MenuItemCompat.setOnActionExpandListener(searchMenuItem, new MenuItemCompat.OnActionExpandListener() {

            @Override
            public boolean onMenuItemActionExpand(MenuItem item) {
                /**This never gets called**/
                Log.d("DEBUGGIN", "Inside MenuItemCompat onMenuItemActionExpand");
                return true;
            }

            @Override
            public boolean onMenuItemActionCollapse(MenuItem item) {
                /**This never gets called**/
                Log.d("DEBUGGIN", "Inside MenuItemCompat onMenuItemActionCollapse");
                return true;
            }
        });
    }

    //return true onCreateOptionsMenu
    return true;
}

Answer 1

您可以像这样在 MenuItem 上设置展开/折叠监听器:

menuItem.setOnActionExpandListener(new MenuItem.OnActionExpandListener() {
    @Override
    public boolean onMenuItemActionExpand(MenuItem item) {
        return true;
    }

    @Override
    public boolean onMenuItemActionCollapse(MenuItem item) {
        return true;
    }
});

此监听器是在 API 级别 14 中引入的，因此为了向后兼容，您必须使用 v4 支持库。如果这样做，则必须像这样设置展开/折叠监听器:

MenuItemCompat.setOnActionExpandListener(this.searchItem, new MenuItemCompat.OnActionExpandListener() {

    @Override
    public boolean onMenuItemActionExpand(MenuItem item) {
        return true;
    }

    @Override
    public boolean onMenuItemActionCollapse(MenuItem item) {
        return true;
    }
});