title: How Generate boot.oat
body: <p>I need modify android.policy.jar in Android L. I just have ROM and device, no aosp.</p>
  
  <p>Now, I can decompiler boot.oat by oat2dex.jar, get dex like android.policy.dex/framework.dex ...</p>
  
  <p>My preblem is that I do not know how to generate boot.oat after decompiler it. </p>
  
  <p>I want to modify android.policy and then re-generate boot.oat, replace the original one.</p>
  
  <p>Is there any one please help me on that?</p>