我有一个搜索对话框,需要从数据库启用建议,如http://developer.android.com/images/search/search-suggest-custom.png所示。
当我点击操作栏菜单项时,我的搜索对话框将显示在顶部。当用户开始输入某些文本时,它应该搜索数据库并相应地显示建议。截至目前,我有一个搜索对话框,但当用户输入某些文本时,不会显示任何建议。
我的内容提供商:
public class MyCustomSuggestionProvider extends ContentProvider {
SQLiteDatabase db;
SQLiteQueryBuilder qb;
String sqlTables = "countries";
@Override
public int delete(Uri uri, String selection, String[] selectionArgs) {
return 0;
}
@Override
public String getType(Uri uri) {
return null;
}
@Override
public Uri insert(Uri uri, ContentValues values) {
return null;
}
@Override
public boolean onCreate() {
return false;
}
public Cursor query(Uri uri, String[] projection, String selection,
String[] selectionArgs, String sortOrder) {
MyDatabase myDB = new MyDatabase(getContext());
db = myDB.getReadableDatabase();
Cursor c = null;
if (selectionArgs != null && selectionArgs.length > 0
&& selectionArgs[0].length() > 0) {
qb = new SQLiteQueryBuilder();
String[] sqlSelect = { "name" };
qb.setTables(sqlTables)
c = qb.query(db, null, selection, selectionArgs, null, null,
null);
c.moveToFirst();
} else {
return null;
}
return c;
}
@Override
public int update(Uri uri, ContentValues values, String selection,
String[] selectionArgs) {
return 0;
}
}
我的清单:
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/Theme.Visa" >
<provider
android:name="com.m7.visa.contentprovider.MyCustomSuggestionProvider"
android:authorities="com.m7.visa.contentprovider.MyCustomSuggestionProvider" >
</provider>
<activity
android:name="com.m7.visa.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.SEARCH" />
</intent-filter>
<meta-data
android:name="android.app.searchable"
android:resource="@xml/searchable" />
</activity>
</application>
我的可搜索配置:
<?xml version="1.0" encoding="utf-8"?>
<searchable xmlns:android="http://schemas.android.com/apk/res/android"
android:hint="hint..."
android:label="@string/app_name"
android:searchSuggestAuthority="com.m7.visa.contentprovider.MyCustomSuggestionProvider"
android:searchSuggestIntentAction="android.intent.action.VIEW"
android:searchSuggestSelection=" ?" >
</searchable>
任何想法我哪里出错了?
答案 0 :(得分:4)
问题出在问号android:searchSuggestSelection=" ?" >
中。当你在搜索视图中输入'something'时,它会传递'something',左边是空格。所以解决方案是删除空间,但'?'是Android XML文件中的一个特殊字符,这意味着你必须逃避它。
所以最终的解决方案是android:searchSuggestSelection="\?" >
答案 1 :(得分:1)
尝试删除第android:searchSuggestSelection=" ?" >
行
到android:searchSuggestSelection="?" >