I absolutely agree with Ulises that two part epoxy is the only way to go. While what jud says is true, I think that, with the small size of the parts involved, the amount of expansion/contraction will be insufficient to disturb the integrity of the glue joint or that the forces involved will be insufficent to cause any significant distortion.
I agree that the traditional method of mixing epoxy, by squeezing out two equal sized puddles of glue and hardener onto a surface and mixing gives rise to significant waste. I picked up the following "toothpick" method from a 1/43 scale car modelling site a few years ago, and found it fantastic at cutting down both waste and mess. It lets you mix up nano amounts of epoxy, with the result that 5ml tubes seem to last forever.
You need a pile of tooth picks, and a decent sized mixing surface, as well as a suitable epoxy - I tend to use a 5 minute epoxy for convenience, although will use a longer set if maximum strength is required.
I place the glue and a single toothpick on one side of the work area, and the hardener and the rest of the toothpicks on the other. Open both tubes, and squeeze gently until glue and hardener fill the nozzles of the tubes. Using the single toothpick scoop out just enough glue out of the nozzle to do the job, and trasfer to the mixing surface. Place both glue and toothpick back, and well away from the hardener. I Ihen dig out the equal amount of hardener from its tube with one of the tothpicks from the pile, and use that toothpick to mix up the adhesive. That tothpick is also used as the applicator. Discard the toothpick with mixed adhesive on it, and you're ready to go again. I recycle the glue toothpick, and use a fresh toothpick from the pile for hardener. Keeping track of the tothpicks is essential - introducing the mixed glue toothpick back into the glue tube, or the glue toothpick into the hardener tube spell disaster.
With a bit of practice, you can easily mix up sub-millimetre drops of glue.
Hope that's helpful.