question: @ Override public void run ( ) { if ( mDelay > 0 ) { try { Thread . sleep ( mDelay ) ; } catch ( InterruptedException e ) { LogImpl . w ( TAG , getName ( ) + ": " + e . getMessage ( ) ) ; } } if ( mParentTask != null ) { synchronized ( this ) { try { wait ( ) ; } catch ( InterruptedException e ) { LogImpl . w ( TAG , getName ( ) + ": " + e . getMessage ( ) ) ; } } } mStatus = Status . STATUS_EXECUTING ; long startTime = System . currentTimeMillis ( ) ; start ( ) ; long endTime = System . currentTimeMillis ( ) ; LogImpl . i ( TAG , getName ( ) + " runs " + ( endTime - startTime ) ) ; if ( mDoneSignal != null ) { mDoneSignal . countDown ( ) ; } if ( mChildTask != null ) { synchronized ( mChildTask ) { mChildTask . notify ( ) ; } } mStatus = Status . STATUS_DONE ; }
target:  Normally should not override it