(Two program code files, android under, are attached to the CD_ 1.1SDK_ Programs in the Compile directory can be directly run in the 1.1 environment, while android under_ 1.5SDK_ Programs in the Compile directory can be directly run in the 1.5 environment: 1. android under_ 1.1SDK_ The model program under the Compile directory can be directly imported and run according to the configuration environment described in Chapter 2 of the book. If you need to run this sample program created in the 1.1 environment in the 1.5SDK environment, you can upgrade the code according to the instructions in the "Setting Instructions for Compatible Android 1.5SDK Version. docx" document on the CD. 2. For convenience, we have set the model program file to be compatible with the 1.5SDK environment. You can directly use Android under the 1.5SDK environment_ 1.5SDK_ It is a typical program in the Compile.rar directory, without the need for rated settings. 3. Introduction to other books in the mobile development series of the People's Post and Telecommunications Publishing House.)