返回整數數組的SQLite查詢數據

你好，任何幫助將是偉大的謝謝你！我有3場在我的數據庫表返回整數數組的SQLite查詢數據

public static final String colExpID = "ExpenseID";  
public static final String colExpExpense = "ExpenseDisc"; 
public static final String colExpAmount = "Amount";

我的方法來查詢數據

public Integer[] queryHouse() { 
     // TODO Auto-generated method stub 
     String[] columns = new String[]{colExpID,colExpExpense,colExpAmount}; 
     Integer[] Result = new Integer[]{};  
     Cursor c = ourDatabase.query(ExpenseTable, columns, null, null, null, null, null); 
     int iExpense = c.getColumnIndex(colExpExpense); 
     int iAmount = c.getColumnIndex(colExpAmount); 
     for(int i = 0; i < c.getCount();i++){ 
      if(c.getString(iExpense) == "House"){ 
      Result[i] = Integer.parseInt(c.getString(iAmount)); 
      } 
     } 
     return Result; 
    }

我不知道我錯過了什麼謝謝！

來源

2012-03-18 user996502

我也不清楚，你錯過了什麼，因爲你沒有指定什麼是你所要完成的，你是如何在不及格的。 – SWeko 2012-03-18 10:04:23

您正在比較字符串與==不正確。使用equals：

if(c.getString(iExpense).equals("House")) 
    . 
    . 
    .

來源

2012-03-18 10:06:32 giorashc

公共無效的onCreate（SQLiteDatabase分貝）{ \t \t \t // TODO自動生成方法存根 \t \t \t db.execSQL（「創建表」 + IncomeTable + 「（」 + colID + 「整數PRIMARY KEY AUTOINCREMENT，」 + colIncome +「money）;」）; db.execSQL（「create table」+ ExpenseTable +「（」+ colExpID +「Integer PRIMARY KEY AUTOINCREMENT，」+ colExpExpense +「text，」+ colExpAmount +「money）;」）; \t \t \t \t \t} – user996502 2012-03-18 19:36:26

public void onCreate(SQLiteDatabase db) { 
      // TODO Auto-generated method stub 
      db.execSQL("create table " + IncomeTable + " (" + colID + " Integer PRIMARY KEY AUTOINCREMENT, " + colIncome + " money);"); 
      db.execSQL("create table " + ExpenseTable + " (" + colExpID + " Integer PRIMARY KEY AUTOINCREMENT, " + colExpExpense + " text, " + colExpAmount + " money);"); 

     }

來源

2012-03-18 19:36:51 user996502

返回整數數組的SQLite查詢數據

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