The class MainActivity: AppCompatActivity () {
Private val tag="MainActivity" 
Override fun onSaveInstanceState (outState: Bundle) {
The d (tag, "onSaveInstanceState ()... 
 ")Super. OnSaveInstanceState (outState)//temporarily saved data 
STR val temdata="https://bbs.csdn.net/topics/something" 
OutState. PutString (" data1 ", temdata) 
Val temdata2=99.99 
OutState. PutDouble (" data2 ", temdata2) 
Val temdata3=false 
OutState. PutBoolean (" data3, "temdata3) 
} 

Override fun onCreate (savedInstanceState: Bundle? {
Super. OnCreate (savedInstanceState) 
The d (tag, "onCreate.. 
 ")Val binding=ActivityMainBinding. Inflate (layoutInflater) 
The setContentView (binding. Root) 
If (savedInstanceState!=null) {
The d (tag, "running... 
 ")The d (tag, "STR: ${savedInstanceState. Get string (" data1")} ") 
The d (tag, "double: ${savedInstanceState. GetDouble (" data2")} ") 
The d (tag, "Boolean: ${savedInstanceState. GetBoolean (" data3")} ") 
} the else 
The d (tag, "savedInstanceState is null... 
 ")Binding. BtnShowNormal. SetOnClickListener {
Val intent=intent (this, NormalActivity: : class. Java) 
StartActivity (intent) 
} 
Binding. BtnShowDialog. SetOnClickListener {
Val intent=intent (this, DialogActivity: : class. Java) 
StartActivity (intent) 
} 
}//end oncreate