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kotlinlang

Running into a strange issue with `View.generateViewId()` here with programatically created Views. It only outputs sequential IDs starting with `1`, and `onRestoreInstanceState` on these Views isn't called at all upon restore. Any ideas?

`generateViewId` will generate ids which do not collide with generated ID values so I guess sequential IDs starting with `1`  don’t collide :shrug: .

As for `onRestoreInstanceState` , as I read it, if nothing is saved by `onSavedInstance` state, it won’t be called

The implementation of `generateViewId` :
```public static int generateViewId() {
        for (;;) {
            final int result = sNextGeneratedId.get();
            // aapt-generated IDs have the high byte nonzero; clamp to the range under that.
            int newValue = result + 1;
            if (newValue &gt; 0x00FFFFFF) newValue = 1; // Roll over to 1, not 0.
            if (sNextGeneratedId.compareAndSet(result, newValue)) {
                return result;
            }
        }
    }```
`sNextGeneratedId` being initialised with
```new AtomicInteger(1)```


I did save state. I was blaming the generated ID because it seemed so weird compared to the static ones, but you're right, that makes no difference at all.

My problem was that I was creating this View programatically in `Activity.onCreate`, and generating its ID each time, so there was no guarantee that the ID in the saved state would be a match