question: public void onProgress ( int bytesWritten , int totalSize ) { Log . v ( LOG_TAG , String . format ( "Progress %d from %d (%2.0f%%)" , bytesWritten , totalSize , ( totalSize > 0 ) ? ( bytesWritten * 1.0 / totalSize ) * 100 : - 1 ) ) ; }
target:  Fired when the request progress, override to handle in your own code