(Open source mobile phone operating system based on Linux platform, which includes an operating system. This course is the main lecture and the main contents of the whole set of courses are as follows: 1. How to install the Android SDK and Eclipse plug-in 2. Develop the first Android to use 3. Android application architecture 4. Develop and use the telephone dialer 5. Display units in Android 6. Solution to the "not registered network" error message 7)