android - 在 ActionBar 上创建 "history"到 SearchView

Question

我想在我的 SearchView 上有历史记录，我一直在谷歌搜索，我找到的唯一合理(？)教程是 this ，但那只是像 Gingerbread ，而不是 API>14。

然后我找到了这段代码:

String[] columnNames = {"_id","text"};
        MatrixCursor cursor = new MatrixCursor(columnNames);
        String[] array = {"Snääälla", "bla bla bla", "Jävla piss"}; //if strings are in resources
        String[] temp = new String[2];
        int id = 0;
        for(String item : array){
            temp[0] = Integer.toString(id++);
            temp[1] = item;
            cursor.addRow(temp);
        }
        String[] from = {"text"};
        int[] to = {android.R.id.text1};
        CursorAdapter ad = new SimpleCursorAdapter(this.getActivity(), android.R.layout.simple_list_item_1, cursor, from, to);
        mSearchView.setSuggestionsAdapter(ad);

而且该代码只工作了一半，因为它不显示您已经编写的结果，它显示所有项目。

我只是希望它看起来像这样:

这是我当前用于添加 SearchView 的代码:

res/menu/menu.xml:

<item android:id="@+id/fragment_searchmenuitem"
      android:icon="@drawable/ic_search_white"
      android:title="@string/menu_search"
      android:showAsAction="collapseActionView|ifRoom"
      android:actionViewClass="android.widget.SearchView" />

主要 Activity .java:

@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
    if(!mDrawerLayout.isDrawerOpen(mDrawerList)) {
        inflater.inflate(R.menu.fragment_search, menu);

        mMenuItem = menu.findItem(R.id.fragment_searchmenuitem);
        mSearchView = (SearchView) mMenuItem.getActionView();
        mMenuItem.expandActionView();
        mSearchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
            @Override
            public boolean onQueryTextSubmit(String s) {
                mMenuItem.collapseActionView();
                searchSupport.SearchForLyrics(s);
                actionBar.setSubtitle("Searcing for: " + s);
                return true;
            }

            @Override
            public boolean onQueryTextChange(String s) {
                return false;
            }
        });
    }

    super.onCreateOptionsMenu(menu, inflater);
}

有人可以给我一些开始的东西吗，老实说，我不知道从哪里开始。因此，我们将不胜感激任何帮助。

Answer 1

本页讨论如何为 SearchView 实现历史记录。

http://developer.android.com/guide/topics/search/adding-recent-query-suggestions.html

首先，您必须创建一个内容提供者:

public class MySuggestionProvider extends SearchRecentSuggestionsProvider {
    public final static String AUTHORITY = "com.example.MySuggestionProvider";
    public final static int MODE = DATABASE_MODE_QUERIES;

    public MySuggestionProvider() {
        setupSuggestions(AUTHORITY, MODE);
    }
}

然后像这样在您的应用程序 list 中声明内容提供者:

<application>
    <provider android:name=".MySuggestionProvider"
              android:authorities="com.example.MySuggestionProvider" />
    ...
</application>

然后像这样将内容提供者添加到您的可搜索配置中:

<?xml version="1.0" encoding="utf-8"?>
<searchable xmlns:android="http://schemas.android.com/apk/res/android"
    android:label="@string/app_label"
    android:hint="@string/search_hint"
    android:searchSuggestAuthority="com.example.MySuggestionProvider"
    android:searchSuggestSelection=" ?" >
</searchable>

您可以随时调用 saveRecentQuery() 来保存查询。以下是您可以在 Activity 的 onCreate 方法中执行此操作的方法:

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

    Intent intent  = getIntent();

    if (Intent.ACTION_SEARCH.equals(intent.getAction())) {
        String query = intent.getStringExtra(SearchManager.QUERY);
        SearchRecentSuggestions suggestions = new SearchRecentSuggestions(this,
                MySuggestionProvider.AUTHORITY, MySuggestionProvider.MODE);
        suggestions.saveRecentQuery(query, null);
    }
}

要清除搜索历史，您只需调用 SearchRecentSuggestions 的方法 clearHistory()，如下所示:

SearchRecentSuggestions suggestions = new SearchRecentSuggestions(this,
        HelloSuggestionProvider.AUTHORITY, HelloSuggestionProvider.MODE);
suggestions.clearHistory();