将默认值设置为SQLite中的列

我有一个SQLite表,并希望暂时将其设置为默认值。 我怎样才能做到这一点?

以下是我的DatabaseHelper类代码:

import android.content.Context; import android.database.sqlite.SQLiteDatabase; import android.database.sqlite.SQLiteOpenHelper; public class DatabaseHelper extends SQLiteOpenHelper { private static final String DATABASE_NAME="iFall.db"; public static final String TIME="time"; //public static final String STATUS="status"; //public static final String MINES="loadmines"; //public static final String OPENTILE="openTile"; public DatabaseHelper(Context context) { super(context,DATABASE_NAME,null,1); } @Override public void onCreate(SQLiteDatabase arg0) { // TODO Auto-generated method stub //CREATE TABLE minesweeper(_id INTEGER PRIMARY KEY AUTOINCREMENT,userId TEXT arg0.execSQL("CREATE TABLE finalP(_id INTEGER PRIMARY KEY AUTOINCREMENT,time TEXT);"); } @Override public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { // TODO Auto-generated method stub db.execSQL("DROP TABLE IF EXISTS finalP"); onCreate(db); } } 

我想为列时间分配一个默认值50。

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