Q:

Will object get collected in that case? 

Let's say I have a reference tree that looks like that:
root => WeakHashMap<View, Binder> => Binder => View
// by WeakHashMap I mean keys (Views) are referenced by WeakReferences
// View is only referenced by Binder

Will View (and Binder) get collected?  Or does reference from Binder to View also has to be weak? 
That's how it looks in code:
class SomeClass {
    private static final Map<View, Binder> binders = new WeakIdentityHashMap<>();
    // (...)
}

class Binder {
    private final View target;

    public Binder(View target) {
        this.target = target
    }
    // (...)
}

A:

No. 
http://docs.oracle.com/javase/7/docs/api/java/util/WeakHashMap.html

Implementation note: The value objects in a WeakHashMap are held by
  ordinary strong references.  Thus care should be taken to ensure that
  value objects do not strongly refer to their own keys, either directly
  or indirectly, since that will prevent the keys from being discarded. 
  Note that a value object may refer indirectly to its key via the
  WeakHashMap itself; that is, a value object may strongly refer to some
  other key object whose associated value object, in turn, strongly
  refers to the key of the first value object.  If the values in the map
  do not rely on the map holding strong references to them, one way to
  deal with this is to wrap values themselves within WeakReferences
  before inserting, as in: m.put(key, new WeakReference(value)), and
  then unwrapping upon each get. 

As for WeakReference from value to key:
Yes.  
http://docs.oracle.com/javase/7/docs/api/java/lang/ref/package-summary.html#reachability

An object is weakly reachable if it is neither strongly nor softly
  reachable but can be reached by traversing a weak reference.  When the
  weak references to a weakly-reachable object are cleared, the object
  becomes eligible for finalization.