Prevent Reload Activity / Webview when go Back to app and when press the turn off button - android-activity

Question

I have a fragment inside of an Activity and then, inside of this fragment I also have a webview.
Problem: After lock my screen and unlock pressing the turn off button, my Activity is recreated or my webview is reloaded (not sure what happens).
The same problem occurs when I switch apps in my device.
I tried to change my configChanges and my launchMode. Here is part of my activity in android manifest file:
<activity
android:name=".MainActivity"
android:label="#string/app_name"
android:configChanges="keyboard|keyboardHidden|orientation|screenSize"
android:windowSoftInputMode="adjustResize"
android:launchMode="singleTop"
>
</activity>
Also I tried to check my savedInstanceState on myCreate:
#Override
protected void onCreate(Bundle savedInstanceState) {
if (savedInstanceState == null) {
this.init(); // Initialize my webview
}
...
EDIT:
#Override
protected void onResume() {
super.onResume();
//Check if the user is authenticated onResume
String message = getIntent().getStringExtra(MainActivity.FragmentIdentifier);
if(message == null || message.compareTo(MainActivity.showWebViewFragment) == 0){
changeFragment(new WebViewFragment());
}else if (message.compareTo(MainActivity.showLoginFragment) == 0){
changeFragment(new LoginFragment());
}
}
Any ideas or code samples will be appreciated, thanks!

Answer 1

I figured out that I should handle the Instance and check if already saved or not, otherwise my onResume could always reload my webview. Here my new code:
#Override
protected void onResume() {
super.onResume();
//Check if the user is authenticated onResume
String message = getIntent().getStringExtra(MainActivity.FragmentIdentifier);
if (message == null || message.compareTo(MainActivity.showWebViewFragment) == 0) {
/*
Check if the instance is saved. If yes, is not necessary to create a new instance of the webview,
otherwise will always reload.
*/
if (!getSavedInstance()){
changeFragment(new WebViewFragment());
}
} else if (message.compareTo(MainActivity.showLoginFragment) == 0) {
changeFragment(new LoginFragment());
}
}
I declared a new global variable
private Boolean savedInstance = false;
And here my get and set
#Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
setSavedInstance(true);
}
public Boolean getSavedInstance() {
return savedInstance;
}
public void setSavedInstance(Boolean instance_saved) {
this.savedInstance = instance_saved;
}