Android appears:...Error solution

Today, the test suddenly told me that I wrote the XX interface and it would crash!

Nani, I definitely don’t agree! How could it be that it crashes with just a click? It’s obviously my own test!

Then I tried it with my own test machine (Version：5.0.2), and then use crash to test the phone (Version：4.4) Good, it actually happened only in 4.4! (There is no verification below 4.4! Maybe it will all!!!)

log display:

 W/: : android/os/PersistableBundle
 W/:   at (Native Method)
 W/:   at (:656)
 W/:   at (:75)
 W/:   at (:163)
 W/:   at (:133)

Then of course it's Google!

*

Finally, the reason for this error was found:

 @Override
public void onCreate(Bundle savedInstanceState, PersistableBundle persistentState) {
  (savedInstanceState, persistentState);
}
@Override
public void onSaveInstanceState(Bundle outState, PersistableBundle outPersistentState) {
  (outState, outPersistentState);
}

@Override
protected void onCreate(Bundle savedInstanceState) {
  (savedInstanceState);
}

@Override
protected void onSaveInstanceState(Bundle outState) {
  (outState);
}

Note that when writing Activity, if you use the method of public two Bundle parameters, then crash will occur on the 4.4 machine!

As for the purpose of sacrificing, I haven't looked at it carefully. In essence, the two parameters are actually a method of taking one parameter. .

public void onCreate(@Nullable Bundle savedInstanceState,
    @Nullable PersistableBundle persistentState) {
  onCreate(savedInstanceState);
}

So don’t be careless when writing these callbacks, remember to rewrite the beginning of protected! ! !