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我的应用程序中有一个用作 ContentProvider 的数据库。

它保存应用程序的设置值，当我安装应用程序时，我希望它只添加一次硬编码的值集。

这就是我目前正在尝试的方式。

 if(settings.size()<= 0){
   Settings s = new Settings("voipusernameTa", "xxxxxxxxx", "xxxxx",
   "displayNameTa", "sip.networks.com", "sip.networks.com", "siprealmTa", 120);
  addNewSettings(s);
 }

这是 addNewSettings 方法：

private void addNewSettings(Settings _settings) {
   ContentResolver cr = getContentResolver();

   String w = CiceroSettings._ID + " = " + _settings.get_Id();
   Log.d("ADDNEW SETTINGS", "new setting id =" + _settings.get_Id());

   Cursor c = cr.query(CiceroSettings.CONTENT_URI, null, w, null, null);
   Log.d("CURSOR", "cursor created");

   int dbCount = c.getCount();
   c.close();

   if (dbCount == 0){
     ContentValues values = new ContentValues();

     values.put(Settings._ID, _settings.get_Id());
     values.put(Settings.VOIPUSERNAME, _settings.getVoipUserName());
     values.put(Settings.VOIPAUTHID, _settings.getVoipAuthId());
     values.put(Settings.PASSWORD, _settings.getPassword());
     values.put(Settings.VOIPDISPLAYNAME, _settings.getVoipDisplayName());
     values.put(Settings.SIPPROXYSERVER, _settings.getSipProxyServer());
     values.put(Settings.SIPREGISTRAR, _settings.getSipRegistrar());
     values.put(Settings.SIPREALM, _settings.getSipRealm());
     values.put(Settings.EXPIRESTIME, Integer.toString(_settings.getExpiresTime()));
     Log.d("CURSOR", "Values assigned");
     cr.insert(CiceroSettings.CONTENT_URI, values);
     Log.d("CURSOR", "Values inserted");
   }
 }

}

但是，每次应用程序启动时，它都会添加一个新的设置对象，我只希望它在安装应用程序时应用一个对象，仅此而已。

有没有人对此有更好的解决方案？还是我的代码有缺陷的原因？

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1 回答 1

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如果您想向 SQL 表添加默认值，我认为最好的方法是在创建表后立即设置它们。

So if you are using SQLiteOpenHelper, in the onCreate method, you can call db.insert() right after creating your table so that those values will be created just once

于 2010-02-18T16:35:44.177 回答