通过onDestroy()事件存储变量 [英] Storing variables through onDestroy() event

问题描述

我正在寻找一种存储变量的状态的方法，这些变量的状态可能已从初始变量(通过用户激活函数或其他方式)通过通过 onDestroy( )事件，这样，即使我打开和关闭手机，我的应用也不会重置变量.

I'm looking for a way to store the state of my variables that may have been changed from there initiation variable (ever by user activating a function or other) through the onDestroy() event so that if i turn my phone on and off my app hasn't reset the variables.

推荐答案

首先，这是来自android参考:注意:不要指望onDestroy方法被称为保存数据的地方！例如，如果活动是在内容提供者中编辑数据，这些编辑应在onPause()或onSaveInstanceState(Bundle)中提交

First of all, this is from android reference: "Note: do not count on onDestroy method being called as a place for saving data! For example, if an activity is editing data in a content provider, those edits should be committed in either onPause() or onSaveInstanceState(Bundle)"

要保存变量，可以按照SharedPreferences之前的说明使用.

For saving variables you can use as said before SharedPreferences.

使用内部活动类的示例:

Example for using inside activity class:

SharedPreferences prefs = getSharedPreferences("preference_file_name", Context.MODE_PRIVATE);
SharedPreferences.Editor editor = prefs.edit();
editor.putString("variable_key", variable);
editor.commit();

对于方法onSaveInstanceState(Bundle)，只需使用Bungle参数保存变量

For method onSaveInstanceState(Bundle) just use Bungle argument to save variables

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