now you get a file folder in that folder and now you can easily read xml files also. Step 4: It's not any step just copy contents of both folder(in this case both new folder)to the single one. Source:- Android: Getting source code from an APK file.
It was Lewis Nixon who invented the very first sonar-type listening device in 1906. He was seeking a way of detecting icebergs. But the sonar was not invented, its inventor was nobody, but developed through the years. Sonar had very humble beginnings, from crude instruments to advanced technology.
During the 1940s and 1950s, scientists began using radar on moving ships to map large areas of the ocean floor in detail. The youngest rocks are found nearest to the mid-ocean ridges. The scientists Harry Hess invented echo-sounding devices for mapping the ocean floor. As the seafloor spreads apart, hot saltwater moves upward and flows from the cracks. As the new seafloor moves away from the ridge and becomes hotter, it moves upward and forms still higher ridges.