Android - 防止 SearchView 建议中的文本截断？

Question

出现在我的 SearchView 下方的默认 ListView 中的建议包含被截断的文本。我希望文本完整显示(必要时分多行显示)。

我想出了两种可能的方法来解决这个问题，但是网上没有找到示例，我希望这里有人可以提供帮助...

方法 #1/Q1:如何直接访问和修改包含 SUGGEST_COLUMN_TEXT_1 和 SUGGEST_COLUMN_TEXT_1 文本的 TextView 的外观？

方法 #2/Q2:或者，SearchView 有一个 setSuggestionsAdapter(CursorAdapter adapter) 方法，看起来它可能(更？)比方法 #1 更合适。虽然我已经阅读了 CursorAdapters 并且已经在我的应用程序中实现了一个，但我不确定如何为 SearchView 配置一个(特别是在访问光标方面)，所以任何人都可以帮助我提供一些一般指导还是骨架示例？

这是我的 SearchViewFragment 类中的现有代码:

public class SearchViewFragment extends Fragment {

public SearchViewFragment() {
}

@Override
public void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
    Bundle savedInstanceState) {

    // Inflate the layout for this fragment
    View fragmentView =  inflater.inflate(R.layout.fragment_search_view, container, false);

    // Use the Search Manager to find the SearchableInfo related to this Activity
    SearchManager searchManager = (SearchManager)getActivity().getSystemService(Context.SEARCH_SERVICE);
    SearchableInfo searchableInfo = searchManager.getSearchableInfo(getActivity().getComponentName());

    // Bind the Activity's SearchableInfo to the Search View
    SearchView searchView = (SearchView)fragmentView.findViewById(R.id.searchView);
    searchView.setSearchableInfo(searchableInfo);
    searchView.setIconifiedByDefault(false);
    searchView.setSubmitButtonEnabled(true);
    //searchView.setQueryRefinementEnabled(true);

    return fragmentView;
}

更新:已解决!

感谢接受的答案，我创建了这段代码，它非常干净并且工作得很好......

public class SearchViewFragment extends Fragment {

    private static final String LOG_TAG = SearchViewFragment.class.getSimpleName();

    public SearchViewFragment() {
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        setRetainInstance(true); //todo - not working - Remember search term
        super.onCreate(savedInstanceState);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {

        // Inflate the layout for this fragment
        View fragmentView =  inflater.inflate(R.layout.fragment_search_view, container, false);

        // Use the Search Manager to find the SearchableInfo related to this Activity
        SearchManager searchManager = (SearchManager)getActivity().getSystemService(Context.SEARCH_SERVICE);
        SearchableInfo searchableInfo = searchManager.getSearchableInfo(getActivity().getComponentName());

        // Bind the Activity's SearchableInfo to the Search View
        final SearchView searchView = (SearchView)fragmentView.findViewById(R.id.searchView);
        searchView.setSearchableInfo(searchableInfo);
        searchView.setIconifiedByDefault(false);
        searchView.setSubmitButtonEnabled(true);
        //searchView.setQueryRefinementEnabled(true);

        searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
            @Override
            public boolean onQueryTextSubmit(String s) {
               //DO whatever you want here on text submit in the search View
                Log.d(LOG_TAG, "onQueryTextSubmit(" + s + ")");

                return true;
            }
            @Override
            public boolean onQueryTextChange(String textChange) {

                Log.d(LOG_TAG, "onQueryTextChange(" + textChange + ")");

                ContentResolver cr = getActivity().getContentResolver();

                Uri uri = DbContentProvider.CONTENT_URI_REAL_PRODUCTS;
                String[] projection = DbContentProvider.getProjectionIn(DbContentProvider.REAL_PRODUCTS_SUGGEST);
                String selection = DbContentProvider.getSelection(false);
                String[] selectionArgs = {Utilities.formatQueryString(textChange)};
                String sortOrder = null;
                Cursor cursor = cr.query(uri, projection, selection, selectionArgs, sortOrder);
                Log.d(LOG_TAG, "Setting setSuggestionsAdapter. cursor: " + cursor);
                searchView.setSuggestionsAdapter(new SearchSuggestionsAdapter(getActivity(), cursor));

                return true;

            }
        });

        return fragmentView;
    }

    private static class SearchSuggestionsAdapter extends SimpleCursorAdapter {

        private static final String[] mVisible = {SearchManager.SUGGEST_COLUMN_TEXT_1, SearchManager.SUGGEST_COLUMN_TEXT_2};
        private static final int[] mViewIds = {R.id.product_name, R.id.product_shelf};

        public SearchSuggestionsAdapter(Context context, Cursor cursor) {

            super(context, R.layout.search_view_suggestions, cursor, mVisible, mViewIds, 0);

        }
        /*
        @Override
        public void bindView(View view, Context context, Cursor cursor) {

            Log.d(LOG_TAG, "bindView(" + view + ", " + context + ", " + cursor + ")");
            super.bindView(view, context, cursor);

        }

        @Override
        public View newView(Context context, Cursor cursor, ViewGroup parent) {

            Log.d(LOG_TAG, "newView(" + context + ", " + cursor + ", " + parent + ")");
            return super.newView(context, cursor, parent);

        }
        */

    }

}

这是我的 search_view_suggestions.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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin" >

    <TextView
        android:id="@+id/product_name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Product Name placeholder"
        android:textAppearance="?android:attr/textAppearanceMedium" />

    <TextView
        android:id="@+id/product_shelf"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Product Shelf placeholder" />

</LinearLayout>

...结果是没有文本截断。 :-)

Answer 1

您似乎想要为您的搜索 View 结果自定义布局。我将尝试在下面概述一些明确的步骤:

要使搜索 View 正常工作，我们需要在 res/xml 文件夹 中有一个 searchable.xml 和一个位于以下位置的 content provider所有时间。

searchable.xml 示例:

<searchable xmlns:android="http://schemas.android.com/apk/res/android"
    android:label="@string/app_name"
    android:searchSuggestAuthority="com.example.searchProvider" ></searchable>

label 和 searchSuggestAuthority 是必需的。 searchSuggestAuthority 应该指向内容提供者的位置

将 intent-filter 元数据添加到 list 中的 Activity 。示例:

  <meta-data android:name="android.app.searchable" android:resource="@xml/searchable"/>

在 Activity/fragment 中，获取您的 searchView 对象并将其传递给自定义适配器以显示自定义布局。

searchView.setSearchableInfo(manager.getSearchableInfo(getActivity().getComponentName()));
        final SearchView.OnQueryTextListener queryTextListener = new SearchView.OnQueryTextListener() {
            @Override
            public boolean onQueryTextSubmit(String s) {
               //DO whatever you want here on text submit in the search View

                return true;
            }
 @Override
            public boolean onQueryTextChange(String textChange) {


                searchView.setSuggestionsAdapter(new ExampleAdapter(context,yourData));

            }
        };

确保自定义适配器扩展了 cursorAdapter。

public class ExampleAdapter extends CursorAdapter {

    private Cursor cursor;

    private TextView text;

    public ExampleAdapter(Context context, Cursor cursor) {

        super(context, cursor);

        this.cursor= cursor;

    }

    @Override
    public void bindView(View view, Context context, Cursor cursor) {

        text.setText((cursor.getString(cursor.getColumnIndex(YOUR_STRING_KEY));));

    }

    @Override
    public View newView(Context context, Cursor cursor, ViewGroup parent) {

        LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        View view = inflater.inflate(R.layout.item, parent, false);

        text = (TextView) view.findViewById(R.id.text);

        return view;

    }

}

在上面的代码中，R.layout.item 指的是您的自定义 xml 文件，您可以使用该文件在搜索 View 结果中进行扩充。

但请确保您使用的是 content provider。 searchView 没有它就无法工作。即使您只是临时缓存数据也没关系。

希望这对您有所帮助!