Question

我写了一封信,以在接口中保存一个标识的密码。用户可在密码上更改标识。我使用以下法典来挽救密码,这样,在重新启用时,密码不会再起。

@Override
public void onSaveInstanceState(Bundle savedInstanceState){
savedInstanceState.putString("pwd", currentPwd);
super.onSaveInstanceState(savedInstanceState);
}

@Override
public void onRestoreInstanceState(Bundle savedInstanceState){
    currentPwd = savedInstanceState.getString("pwd");
}

但我发现,这只能节省一段时期的密码。当我等待很长一段时间,大约1个小时,没有再接回流动,我将重写我的密码。

如何拯救密码,使之不会重新出现?

Answer 1

您必须利用共同参比来节省数据:

SharedPreferences prefs =
     getSharedPreferences("myprefname",Context.MODE_PRIVATE);

SharedPreferences.Editor editor = prefs.edit();
editor.putString("pwd", "thepassword");
editor.commit();

那么,你可以推翻:

SharedPreferences prefs =
    getSharedPreferences("myprefname",Context.MODE_PRIVATE);

String password=prefs.getString("pwd",null);

Answer 2

长期以来,你可以使用<代码>共享P参比来节省这类信息。

public class PreferenceData 
{
    static final String PREF_USER_PASSWORD = "user_password";

    public static SharedPreferences getSharedPreferences(Context ctx) 
    {
        return PreferenceManager.getDefaultSharedPreferences(ctx);
    }

    public static void setUserPassword(Context ctx, String userPassword) 
    {
        Editor editor = getSharedPreferences(ctx).edit();
        editor.putString(PREF_USER_PASSWORD, userPassword);
        editor.commit();
    }

    public static String getUserPassword(Context ctx) 
    {
        return getSharedPreferences(ctx).getString(PREF_USER_PASSWORD, "");
    }
}

Answer 3

I have the exact same problem as you or did have. I simply used Shared_Prefs. It saves the login data in an XML file and you read and write to it.

http://developer.android.com/guide/topics/data/data-storage.html

书写:

SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
            SharedPreferences.Editor editor = settings.edit();
            editor.putString("key1", username);
            editor.putString("key2", password);
            editor.commit();

阅读:

SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
        String username = settings.getString("key1", null);
        String password = settings.getString("key2", null);

友情链接