我使用getLastNonConfigurationInstance()来保存对象,同时改变方向在我的活动。现在是pcated德$ P $。什么是另类的最佳方式?该文件说,使用碎片。但我需要使用的活动。
I am using getLastNonConfigurationInstance() to save object while changing orientation in my activity. now it is deprecated. What is the best way of alternative? the documentation says "use Fragment". But i need to use activity.
有关节能状态,可以使用的onSaveInstanceState(包savedInstanceState)
。你可以恢复已保存的状态无论是在的onCreate
或 onRestoreInstanceState(包savedInstanceState)
。
For saving state, use onSaveInstanceState(Bundle savedInstanceState)
. You can restore saved state either in onCreate
or in onRestoreInstanceState(Bundle savedInstanceState)
.
@Override
public void onSaveInstanceState(Bundle 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", "Hello Android");
super.onSaveInstanceState(savedInstanceState);
}
借助捆绑本质上是存储键 - 值的方法对地图, 并且它会被传递给的onCreate,也onRestoreInstanceState在哪里 你会提取值是这样的:
The Bundle is essentially a way of storing a Key-Value Pair" map, and it will get passed in to onCreate and also onRestoreInstanceState where you would extract the values like this:
@Override
public void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
// Restore UI state from the savedInstanceState.
// This bundle has also been passed to onCreate.
boolean myBoolean = savedInstanceState.getBoolean("MyBoolean");
double myDouble = savedInstanceState.getDouble("myDouble");
int myInt = savedInstanceState.getInt("MyInt");
String myString = savedInstanceState.getString("MyString");
}