如何保持对Android中的应用程序的信息？ [英] How to keep information about an app in Android?

问题描述

我想知道，如果它能够保持在约例如当一个应用程序的信息。

I want to know if its possible to keep information about an app in a while for example.

我有一个访问该文件，并获取有关用户所做的选择信息的应用程序。例如：

I have an app that access this file and get information about the choices that the user have made. For example:

我有很多事件（事件是一个模型）一个按钮，我想知道，即使在应用程序重新启动的按钮，如果用户点击。

I have a button for many events (event is a model), and i want to know if the user clicked in the button even after the application restarts.

我知道这是可以保持大约登录名和密码信息。可以做这样的事情与其他信息？

I know that it is possible to keep information about login and password. Is possible to do something like this with other information?

推荐答案

使用共享preferences 。像这样：

创建这些方法的使用，或者只是使用内容的方法里面，只要你想要的：

Create these methods for use, or just use the content inside of the methods whenever you want:

public String getPrefValue()
{
  SharedPreferences sp = getSharedPreferences("preferenceName", 0);
  String str = sp.getString("myStore","TheDefaultValueIfNoValueFoundOfThisKey");
  return str;
}

public void writeToPref(String thePreference)
{
  SharedPreferences.Editor pref =getSharedPreferences("preferenceName",0).edit();
  pref.putString("myStore", thePreference);
  pref.commit();
}

您可以打电话给他们这样的：

You could call them like this:

// when they click the button:
writeToPref("theyClickedTheButton");

if (getPrefValue().equals("theyClickedTheButton"))
{
   // they have clicked the button
}
else if (getPrefValue().equals("TheDefaultValueIfNoValueFoundOfThisKey"))
{
   // this preference has not been created (have not clicked the button)
}
else
{
   // this preference has been created, but they have not clicked the button
}

的code说明：

Explanation of the code:

preferenceName是preference您提到这个名字，因此具有每次访问的具体时间$是相同的p $ pference。例如：密码，theirSettings

"preferenceName" is the name of the preference you're referring to and therefore has to be the same every time you access that specific preference. eg: "password", "theirSettings"

的MyStore指的是一个具体的字符串存储在preference他们可以是多个。 例如：你有preference theirSettings，以及随后的MyStore可能是的声音preFS，颜色preFS，语言等。

"myStore" refers to a specific String stored in that preference and their can be multiple. eg: you have preference "theirSettings", well then "myStore" could be "soundPrefs", "colourPrefs", "language", etc.

注意：：您可以使用布尔做到这一点，整数等

所有你需要做的是改变字符串存储和读取到布尔，或任何类型你想要的。

All you have to do is change the String storing and reading to boolean, or whatever type you want.

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