錯誤：不是聲明（查詢）

Question

我是android新手，現在試圖使用cursor從SQLite檢索數據。如何解決我的selectQuery？

List<Info> info=new ArrayList<Info>(); 
     String selectQuery=("SELECT Weather, Date, Status, TimeIn_Info, TimeOut_Info FROM " + MyDatabaseHelper.TABLE_INFO + " WHERE Name = ?",new String{}(String.valueOf(name))); 
     database = dbHelper.getWritableDatabase(); 
     Cursor cursor=database.rawQuery(selectQuery,null); 

錯誤

Error:(77, 142) error: ')' expected 
Error:(77, 143) error: <identifier> expected 
Error:(77, 147) error: not a statement 
Error:(77, 153) error: ';' expected 
Error:(77, 177) error: ';' expected 

Answer 1

錯誤是由於您的字符串選擇查詢。你在中間有一個逗號，這沒有任何意義。連接運算符是+，你有沒有,

這

String selectQuery=("SELECT Weather, Date, Status, TimeIn_Info, TimeOut_Info FROM " + MyDatabaseHelper.TABLE_INFO + " WHERE Name = ?",new String{}(String.valueOf(name))) 

應該

String selectQuery="SELECT Weather, Date, Status, TimeIn_Info, TimeOut_Info FROM " + MyDatabaseHelper.TABLE_INFO + " WHERE Name = ?"; 

，然後你想要的selectionArgs兩個：

String[] selectionArgs = new String[] {String.valueOf(name)}; 

然後rawQuery：

database = dbHelper.getWritableDatabase(); 
Cursor cursor=database.rawQuery(selectQuery,selectionArgs);