(The source code used in the Android address book is written in JAVA. Some people call the address book "contact management", which means the same thing. There are comments in the source code of this address book, which is particularly helpful for learning. Learn about the use of lists. The contacts in this source code are displayed in the form of list presentation mode: name mobile phone, which is a common way in the use and writing of Android. Other examples include some menu operation skills, which are relatively effective basic knowledge.)
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