android - 从不同 Activity 的不同表中搜索建议

Question

嗨，我已经关注了official android guideline用于启用搜索和搜索建议。我工作得很好，但问题是它只能从一个数据库表中搜索。

我有三个表和三个 Activity ，名称分别为 “BirthdayWisher_Table”、“Tasks_Table”、“Events_Table” 和 “BirthdayWisher_Activity”、“Tasks_Activity”、“Events_Activity”。

我希望当用户处于“BirthdayWisher_Activity”并按下搜索菜单项时，我的应用程序应该从“BirthdayWisher_Table”中搜索数据，而当用户处于“Tasks_Activity”并按下搜索菜单项时，我的应用程序应该从“Tasks_Table”中搜索数据。

但对我来说似乎不可能这样做。

SearchAble 配置文件

    <?xml version="1.0" encoding="utf-8"?>
<searchable xmlns:android="http://schemas.android.com/apk/res/android"
    android:hint="@string/search"
    android:label="@string/app_name"
    android:searchSettingsDescription="@string/search_the_entire_app_"
    android:searchSuggestAuthority="com.beaconimpex.assistant.app.ContentProvider"
    android:searchSuggestIntentAction="android.Intent.action.VIEW"
    android:searchSuggestIntentData="content://com.beaconimpex.assistant.app.ContentProvider/BirthdayWishTable"
    android:searchSuggestPath="BirthdayWishTable"
    android:searchSuggestSelection=" suggest_text_1 LIKE  ? "
    android:searchSuggestThreshold="1" >

</searchable>

这是我如何关联我的 searchAble Activity

    <activity
        android:name="com.beaconimpex.assistant.SearchAppActivity"
        android:label="@string/title_activity_search_app" >
        <intent-filter>
            <action android:name="android.intent.action.SEARCH" />
        </intent-filter>

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

它在 BirthdayWisherTable 上工作得很好(因为我已经指定了)

android:searchSuggestIntentData="content://com.beaconimpex.assistant.app.ContentProvider/BirthdayWishTable"
android:searchSuggestPath="BirthdayWishTable"

我的内容提供商

public class AssistantContentProvider extends ContentProvider {
public static final String DATABASE_NAME = "gcuf__dB";
public static final int DATABASE_VERSION = 99;
public static final String AUTHORITY = "com.beaconimpex.assistant.app.ContentProvider";

SQLiteDatabase db;
private DBOpenHelper dbHelper;

private static final UriMatcher sURIMatcher = new UriMatcher(
        UriMatcher.NO_MATCH);
private static final int SEARCH_SUGGEST = 12345;
static {    

    sURIMatcher.addURI(AUTHORITY, BirthdayWisher.TABLE_NAME + "/"
            + SearchManager.SUGGEST_URI_PATH_QUERY, SEARCH_SUGGEST);
    sURIMatcher.addURI(AUTHORITY, BirthdayWisher.TABLE_NAME + "/"
            + SearchManager.SUGGEST_URI_PATH_QUERY + "/*", SEARCH_SUGGEST);     
}
@Override
public Cursor query(Uri uri, String[] projection, String selection,
        String[] selectionArgs, String sortOrder) {

    Log.i(MyConstants.LOG_TAG, "-----Query method is called with URI: "
            + uri.toString());

    switch (sURIMatcher.match(uri)) {       
    case SEARCH_SUGGEST:
        Log.i(MyConstants.LOG_TAG, "URI Search Suggest");
        if (selectionArgs != null && selectionArgs.length > 0
                && selectionArgs[0].length() > 0) {
            // the entered text can be found in selectionArgs[0]
            // return a cursor with appropriate data
            return queryCursor(uri, BirthdayWisher.TABLE_NAME,
                    BirthdayWisher.allColumns, selection,
                    new String[] { "%" + selectionArgs[0].toLowerCase()
                            + "%" }, null);
        } else {
            // user hasn't entered anything
            // thus return a default cursor
            Log.i(MyConstants.LOG_TAG,
                    "User has not entered anything in the searchBox.");
            return null;
        }

    default:
        throw new IllegalArgumentException("Unsupported URI: " + uri);
    }



       }
}

但是我如何通过使用此方法从相关表中获取数据来为每个 Activity 提供自定义搜索建议？

Answer 1

您只需添加另一个可搜索文件。您可以随意命名它，既然缺少任务，为什么不使用 searchable_tasks.xml？

现在将所有现有的 searchable.xml 复制到此文件中，将 searchSuggestPath 更改为 TasksTable 并对 执行相同的操作searchSuggestIntentData.

当然，您还必须扩展您的内容提供者(将这些额外的可能性添加到 URIMatcher 并在查询方法中对相应的 URI 使用react)。