未调用内容提供商 query() (Android TV)

据报道，我正在尝试将我的应用程序纳入 Android TV 全局搜索中文档 http://developer.android.com/training/tv/discovery/searchable.html我必须创建以下内容：

• 内容提供商
• 可搜索.xml

当然，将它们包含在清单中。 这就是我所做的，我的内容提供者非常简单。它不返回任何数据，但是当它收到 query() 调用时，它会在日志中打印一些行，但它尚未完成。

public class VideoContentProvider extends ContentProvider {
private static String TAG = "VideoContentProvider";
public static String AUTHORITY = "test.tvsearch";

// UriMatcher stuff
private static final int SEARCH_SUGGEST = 0;
private static final int REFRESH_SHORTCUT = 1;
private static final UriMatcher URI_MATCHER = buildUriMatcher();

//private VideoDatabase mVideoDatabase;

/**
 * Builds up a UriMatcher for search suggestion and shortcut refresh queries.
 */
private static UriMatcher buildUriMatcher() {
    UriMatcher matcher = new UriMatcher(UriMatcher.NO_MATCH);
    // to get suggestions...
    Log.d(TAG, "suggest_uri_path_query: " + SearchManager.SUGGEST_URI_PATH_QUERY);
    matcher.addURI(AUTHORITY, SearchManager.SUGGEST_URI_PATH_QUERY, SEARCH_SUGGEST);
    matcher.addURI(AUTHORITY, SearchManager.SUGGEST_URI_PATH_QUERY + "/*", SEARCH_SUGGEST);
    return matcher;
}

@Override
public boolean onCreate() {
    Log.d(TAG, "onCreate");
    //mVideoDatabase = new VideoDatabase(getContext());
    return true;
}

/**
 * Handles all the video searches and suggestion queries from the Search Manager.
 * When requesting a specific word, the uri alone is required.
 * When searching all of the video for matches, the selectionArgs argument must carry
 * the search query as the first element.
 * All other arguments are ignored.
 */
@Override
public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs,
                    String sortOrder) {
    // Use the UriMatcher to see what kind of query we have and format the db query accordingly
    switch (URI_MATCHER.match(uri)) {
        case SEARCH_SUGGEST:
            Log.d(TAG, "search suggest: " + selectionArgs[0] + " URI: " + uri);
            if (selectionArgs == null) {
                throw new IllegalArgumentException(
                        "selectionArgs must be provided for the Uri: " + uri);
            }
            Log.i("...", "WORKED");
            return null;
        default:
            throw new IllegalArgumentException("Unknown Uri: " + uri);
    }
}

/**
 * This method is required in order to query the supported types.
 * It's also useful in our own query() method to determine the type of Uri received.
 */
@Override
public String getType(Uri uri) {
    switch (URI_MATCHER.match(uri)) {
        case SEARCH_SUGGEST:
            return SearchManager.SUGGEST_MIME_TYPE;
        case REFRESH_SHORTCUT:
            return SearchManager.SHORTCUT_MIME_TYPE;
        default:
            throw new IllegalArgumentException("Unknown URL " + uri);
    }
}

// Other required implementations...

@Override
public Uri insert(Uri uri, ContentValues values) {
    throw new UnsupportedOperationException();
}

@Override
public int delete(Uri uri, String selection, String[] selectionArgs) {
    throw new UnsupportedOperationException();
}

@Override
public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
    throw new UnsupportedOperationException();
}

}

可搜索.xml：

<searchable xmlns:android="http://schemas.android.com/apk/res/android"
    android:label="test leanback api demo"
    android:hint="searching for videos test"
    android:searchSettingsDescription="settings text desc"
    android:searchSuggestAuthority="test.tvsearch"
    android:searchSuggestIntentAction="android.intent.action.VIEW"
    android:searchSuggestSelection=" ?"
    android:searchSuggestThreshold="1"
    android:includeInGlobalSearch="true"
    >

该代码几乎直接来自 Android TV Leanback 示例，我提取了这部分，因为它是处理全局搜索的唯一部分。

我也在清单中包含了 searchable.xml 的提供程序和意图过滤器：

<activity
        android:name=".MainActivity"
        android:label="@string/app_name"
        android:theme="@style/AppTheme.NoActionBar" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
            <category android:name="android.intent.category.LEANBACK_LAUNCHER" />

            <action android:name="android.intent.action.SEARCH" />

        </intent-filter>

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

    </activity>

    <provider
        android:name=".VideoContentProvider"
        android:authorities="test.tvsearch"
        android:exported="true" >...

正如我所见，ContentProvider 确实获得了 onCreate 调用，因此它在清单中是正确的。但问题是 Android TV 在搜索时不会通过我的应用程序，因此不会调用查询方法。

我还看到该应用程序没有列在 Android TV 设置 > 首选项 > 搜索 > 可搜索应用程序中，我认为这真的很奇怪，因为在 searchable.xml 中据说将提供程序包含在全局搜索中。因为这段代码几乎是从 Leanback 示例中复制的，所以我没有想法，该示例运行得很好，复制后它会立即中断。

任何帮助将不胜感激！

如果你打开this http://developer.android.com/intl/ru/guide/topics/search/searchable-config.html你会看到两者android:label and android:hint必须是“字符串资源”（@string/something），我认为构建系统（或 lint 工具或其他东西）现在可以捕获这种情况（我花了几个小时来解决像您三四年前的问题一样的确切问题），但是不，似乎开发人员现在也很抓狂，所以只需替换：

android:label="test leanback api demo"
android:hint="searching for videos test"

with:

android:label="@string/search_label"
android:hint="@string/search_hint"

我不确定android:searchSettingsDescription因为在一个地方它说：“字符串资源”，但在详细描述中它是简单的“字符串”