【正文】 ent public transit system, needs to be learned knowledge integrated use of, also need to learn some new knowledge Java, Android, MyEclipse, database knowledge, introduces briefly below. 1. The Android development platform is developed by Google and the open handset alliance cooperation an open, free platform for the mobile terminal, it is by the operating system,The middle software, application of three parts. The platform is provided with the perfect program development environment, including simulation, debugging tools, program execution cost storage, performance appraisal, etc. Platform provides two based on the map of the location service API development kit. Through the two maps API development kit in the use of location services related classes, with the device itself of with the positioning of the orientation and other related modules, is a good way to realize the user mobile spatial information service application , with its integration of unique map service module, as well as to the hardware performance of low requirements, fast access to the 3 g wireless work such as functions, for ordinary users to develop mobile bus query system has brought great convenience, it appears, in order to solve the user mobile spatial information needs to provide a more efficient development platform. 2. Java by Sun Microsystems pany launched in May 1995 Java objectoriented programming language (hereinafter referred to as the Java language) and the floorboard of the Java platform. By James Gosling and colleagues together to research and development, and in 1995 officially launched. Use a Java implementation of HotJava Web browser (support Java applets) show the charm of Java: crossplatform dynamic Web, Inter puting. Since then, Java is widely accepted and promoted the rapid development of the Web, monly used browsers have support for Java applets. On the other hand, Java technology is also constantly updated. Oracle acquired SUN (2020), Java is posed of four aspects: the Java programming language, Java class file format, the Java virtual machine and the Java application program interface (Java API). The Java platform by the Java Virtual Machine (Java Virtual Machine, the JVM) and the Java application programming. Interface (Application Programming Interface, or API). Java application programming interface (API) provides a Java application with a standard interface, independent of the operating system can be divided into basic part and extension. On hardware or operating system platform after the installation of a Java platform, Java applications can run. 3. SQL (Structured Query Language) is a database Query and program design Language, is used to access data and Query, update, and management of relational database is a senior of procedural programming languages, allows the user to work on highlevel data structures. He does not require the user to specify the data storage method, also do not need to users understand the specific way of data storage, so with pletely different underlying structure of the database system can use the same SQL language as a data input