question: @ WorkerThread public synchronized boolean startRecord ( ) { if ( mRecorder == null || mState != STATE_PREPARED ) { setError ( ERROR_NOT_PREPARED ) ; return false ; } try { mRecorder . start ( ) ; } catch ( RuntimeException exception ) { Log . w ( TAG , "startRecord fail, start fail: " + exception . getMessage ( ) ) ; setError ( ERROR_INTERNAL ) ; mRecorder . reset ( ) ; mRecorder . release ( ) ; mRecorder = null ; return false ; } mSampleStart = System . currentTimeMillis ( ) ; mState = STATE_RECORDING ; return true ; }
target:  After prepared, start record now.