文章目录
处理方法
你需要重写 onSaveInstanceState(Bundle savedInstanceState)，把你想要保存的状态写入到 Bundle 中，如下
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@Overridepublic onSaveInstanceState(Bundle savedInstanceState) {super.onSaveInstanceState(savedInstanceState);// Save UI state changes to the savedInstanceState.// This bundle will be passed to onCreate if the process is// killed and restarted.savedInstanceState.putBoolean("MyBoolean",true);savedInstanceState.putDouble("myDouble",1.9);savedInstanceState.putInt("MyInt",1);savedInstanceState.putString("MyString","Welcome back to Android");// etc.} |
Bundle 的本质是键值对的方式存储，你可以通过 onCreate()和 onRestoreInstanceState() 或的对应的值
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@Overridepublic onRestoreInstanceState(Bundle savedInstanceState) {super.onRestoreInstanceState(savedInstanceState);// Restore UI state from the savedInstanceState.// This bundle has also been passed to onCreate.booleanmyBoolean = savedInstanceState.getBoolean("MyBoolean");doublemyDouble = savedInstanceState.getDouble("myDouble");intmyInt = savedInstanceState.getInt("MyInt");String myString = savedInstanceState.getString("MyString");} |
您通常会使用这项技术来存储实例的值的应用程序（选择，未保存的文本等）。
原文地址：http://www.itmmd.com/201410/38.html
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