GetLiveDataValue.java

// This is the Java equivalent function for GetLiveDataValue.kt gist.
// Refer to link below
// https://gist.github.com/Puneet1796/ac1803b96735c61cbe1a8c86f473681f
@SuppressWarnings("unchecked")
@Nullable
public static <T> T getBlockingValue(@NotNull final LiveData<T> liveData) throws InterruptedException {
    final Object[] value = new Object[1];
    final CountDownLatch latch = new CountDownLatch(1);
    Observer<T> innerObserver = new Observer<T>() {
        @Override
        public void onChanged(@Nullable T newValue) {
            value[0] = newValue;
            latch.countDown();
            liveData.removeObserver(this);
        }
    };
    liveData.observeForever(innerObserver);
    latch.await(2, TimeUnit.SECONDS);
    return (T) value[0];
}