对自动完成执行过滤

我有一个自动完成，其中当我开始输入时，显示数据库中两列的内容。对自动完成执行过滤

现在，我想perfom这个过滤和我采取了以下梅托德：


    public Cursor runQueryOnBackgroundThread(CharSequence constraint) { 
      if (getFilterQueryProvider() != null) { return getFilterQueryProvider().runQuery(constraint); } 

      String filter=""; 
      if(constraint==null) filter=""; 

      else filter=constraint.toString(); 

      Cursor cursor=db.getCursor(filter); 
      return cursor; 
     }

在我的课操纵数据库的方法是这样的：


public Cursor getCursor(String prefix) { 


     SQLiteQueryBuilder queryBuilder = new SQLiteQueryBuilder(); 


     String[] args = {prefix}; 


     queryBuilder.setTables(TABLE_2); 


     String[] asColumnsToReturn = new String[] {"route","user_id"}; 


     Cursor mCursor = queryBuilder.query(db,asColumnsToReturn,null, args, null, null,null); 


     int idcol = mCursor.getColumnIndexOrThrow(KEY_ROUTE); 

     int kwcol = mCursor.getColumnIndexOrThrow(KEY_USER_ID); 


     while(mCursor.moveToNext()) { 

      String id = mCursor.getString(idcol); 

      String kw = mCursor.getString(kwcol); 

      Log.d(id,kw); 
     } 

     return mCursor; 
    }

问：为什么在我的自动完成功能中不显示任何内容？

这是我的logcat的样子：



05-01 09:28:59.207: WARN/Filter(366): An exception occured during performFiltering()! 

05-01 09:28:59.207: WARN/Filter(366): android.database.sqlite.SQLiteException: bind or column index out of range: handle 0x3114b8 

05-01 09:28:59.207: WARN/Filter(366):  at android.database.sqlite.SQLiteProgram.native_bind_string(Native Method) 


05-01 09:28:59.207: WARN/Filter(366):  at android.database.sqlite.SQLiteProgram.bindString(SQLiteProgram.java:178) 

05-01 09:28:59.207: WARN/Filter(366):  at android.database.sqlite.SQLiteQuery.bindString(SQLiteQuery.java:190) 

05-01 09:28:59.207: WARN/Filter(366):  at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:55) 

05-01 09:28:59.207: WARN/Filter(366):  at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1220) 

05-01 09:28:59.207: WARN/Filter(366):  at android.database.sqlite.SQLiteQueryBuilder.query(SQLiteQueryBuilder.java:316) 

05-01 09:28:59.207: WARN/Filter(366):  at android.database.sqlite.SQLiteQueryBuilder.query(SQLiteQueryBuilder.java:266) 

05-01 09:28:59.207: WARN/Filter(366):  at com.server.DBAdapter.getCursor(DBAdapter.java:199) 

05-01 09:28:59.207: WARN/Filter(366):  at com.server.Server8$ContactListCursorAdapter.runQueryOnBackgroundThread(Server8.java:185) 

05-01 09:28:59.207: WARN/Filter(366):  at android.widget.CursorFilter.performFiltering(CursorFilter.java:49) 
05-01 09:28:59.207: WARN/Filter(366):  at android.widget.Filter$RequestHandler.handleMessage(Filter.java:234) 
05-01 09:28:59.207: WARN/Filter(366):  at 
android.os.Handler.dispatchMessage(Handler.java:99) 

05-01 09:28:59.207: WARN/Filter(366):  at android.os.Looper.loop(Looper.java:123) 

05-01 09:28:59.207: WARN/Filter(366):  at 
android.os.HandlerThread.run(HandlerThread.java:60)

来源

2011-05-01 adrian

try和while循环

mCursor.moveToFirst() 
while(mCursor.moveToNext()) { 
     String id = mCursor.getString(idcol); 

     String kw = mCursor.getString(kwcol); 

     Log.d(id,kw); 
    }

之前调用moveToFirst（）

来源

2014-01-14 17:36:49 Chris

对自动完成执行过滤

回答

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