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Android notes-Android architecture and android ArchitectureI. Android system architecture The Android system architecture consists of four layers: Linux kernel layer, system library layer, application framework layer, and application layer. Figure 1 architecture of the

Android learning route (19th) Supports different devices-Supports different (Android) platform versions and android routes When the latest Android version provides great APIs for your application, you need to continue to support the old system version before more devices are updated. This course describes how to use th

When talking about serial programming, we have to mention JNI. we have to mention the file descriptor class in Java API: FileDescriptor. Below I will analyze and explain some knowledge points and source code of JNI, FileDescriptor, and serial port respectively. Here we mainly refer to the open-source project android-serialport-api. Basic knowledge about serial port programming: for serial port programming, we only need to set a series of serial ports

Android: Network Operations in android and android There is no difference between network operations in android and java. Many network operation methods in java can be moved to android for use. The main points are as follows: 1. Differences between post and get requests. You

Android development interview: 6. FAQs from common interviewers: Android question ② (updating...), android updated Follow finddreams blog: http://blog.csdn.net/finddreams/article/details/445600611. What are their respective advantages and disadvantages of HttpURLConnection and HttpClient? HttpUrlConnection versions earlier than 2.3 have bugs. Therefore, HttpClie

[Development Diary of Android in a row from scratch] (13th) -- Analysis of Android controls, and introduction to android Android controls are derived from android. view. view class, in android. the widget package defines a large n

In the previous article, I showed you how to create a custom original-android.jar that contains both internal APIs and all classes in the hidden APIs. The next step is to modify the existing Android platform (sdk_dir/platforms/platform-x/Android. Jar ). You can simply replace Android. jar with the original-android.jar created in part 1, but with unlimited use of

Android learning notes ①-Basic installation of android tools, Android Android has been out for a long time, and there are a lot of online tutorials. If you are afraid of forgetting it later, you can learn the knowledge shared by the online experts and record it. If you can help others, that's better! In view of the cur

Android notes-data storage in Android (3), android notes The Android system integrates a lightweight database:SQLiteTherefore, Android supports databases very well and every application can use it conveniently. As an embedded database engine, SQLite is applicable to the acce

Step three, download and install ANDROIDSDKIn the first two steps, we have configured the JDK variable environment and installed Eclipse, and after these two steps, the Java development environment is ready, if we just develop a common Java application, then here we are. But if we're going to develop an Android app through Eclipse, we'll also need to download the Android SDK (software development Kit) and i

Learning about open-source android projects and open-source android ProjectsThis article collects a relatively good open-source Android project. Researching open-source projects is the best way to master the Android platform. The core development team of Android provides 15

Many open-source Android projects are recommended:Android learning Source Code Address: http://www.cnblogs.com/TerryBlog/archive/2011/04/18/2019907.html Http://blog.csdn.net/join_wangzi/article/details/8065227 Shares the source code of 45 Android instances, which is very powerful.Http://www.apkbus.com/android-20978-1-1.html Andriod alarm source codeHttp://www.a

Introduction to the basic components of the android-Android Application (5): four main components of androidActivity Activity is the most basic module. We become an activity. An activity is usually a single screen. Every activity is implemented as an independent class and inherits the base class of the activity. Display the user's view in the implementation class of the activity and process the event. In

• Android: theme = "@ Android: style/theme. Dialog" shows an activity as a dialog box.• Android: theme = "@ Android: style/theme. notitlebar" does not display the application title bar• Android: theme = "@ Android: style/theme. no

Li pengjun, Android Project Director of AI totem, finalized the speech subject: Android audio Port Data Communication Development Topic Introduction: Li Peng will explain how to implement bidirectional communication between audio ports and external devices based on Android audio interfaces based on the development practices of AI totem and hardware. Personal Pr

This article describes how to run the JUnit test. 7. How to run the JUnit Test We have learned a lot of JUnit programs and provided many features in the android ADT plug-in to facilitate unit testing. However, how to perform unit tests, for example, how to run the test example program provided in apidemos \ test, is a bit confusing for our beginners. I also searched for a lot of materials on the Internet, to know how to run the test unit. Therefore, I

(1) Android. App. Fragment: the minimum compatible version is Android: minsdkversion = "11" Therefore, your application is not compatible with applications under 3.0. You can use the (2) Android. Support. v4.app. Fragment: compatible with version 1.6. The ProgramIn the Add or replace method, you also need Android