方法一：

Cursor cursor=null;
        int count=0;
        try{
            String sqls="select count(*) from TableName";
            cursor=dbhelp.getWritableDatabase().rawQuery(sqls, null);
            while(cursor.moveToNext())
            {
                //根據列的索引直接讀取  比如第0列的值
                count= cursor.getInt(0
 
); 
                System.out.println("count:"+count);
            }
            cursor.close();
        }
        catch (Exception e){

        }
        return count;

方法二：

    public Cursor queryAll(){

        Cursor cursor=null;
        try{

            String sqls="select * from TableName"
 
;
            cursor=dbhelp.getWritableDatabase().rawQuery(sqls, null);

        }
        catch (Exception e){

        }
        return cursor;
    }

當結果
queryAll().getCount()==0時，則返回行數為0