title: How to print log messages with in Android framework
body: <p>I am trying to print log messages within core Android framework files. For example, I tried logging messages within <code>MediaRecorderClient.cpp</code> under <code>frameworks\base\media\libmediaplayerservice\</code>. I've tried <code>LOGV</code>, <code>LOGE</code>, <code>LOGD</code>, <code>printf</code>, and <code>__android_log_print</code>, without any success.</p>
  
  <p>Which command should I use to print log messages?</p>