有没有在Android的一个很好的方法，如果一列存在于表中的应用程序数据库？ （我知道有一个与此相似的问题已经，但似乎并没有任何是安卓专用。）

Is there a nice way in Android to see if a column exists in a table in the application database? (I know there are questions similar to this one already, but there don't seem to be any that are Android specific.)

推荐答案

cursor.getColumnIndex（字符串COLUMNNAME）返回-1如果列不存在。所以，我基本上执行像SELECT * FROM XXX极限0,1，并使用光标以确定是否列，你正在寻找一个简单的查询，存在

cursor.getColumnIndex(String columnName) returns -1 if, the column doesn't exist. So I would basically perform a simple query like "SELECT * FROM xxx LIMIT 0,1" and use the cursor to determine if the column, you are looking for, exists

或

您可以尝试查询栏选择theCol从xxx，并捕获异常

you can try to query the column "SELECT theCol FROM xxx" and catch an exception