Developing Android Apps (From Beginner to Master)
With the popularity of smartphones, Android apps have become an essential part of people’s lives. And as a developer, it has become increasingly important to master Android app development skills. In this article, we will introduce in detail how to develop Android apps from entry to mastery.
One, Android app development environment construction
Installation of AndroidStudio before we need to install JavaJDK. you can download and install the latest version of JavaJDK on the official website.
2. Install AndroidStudio
AndroidStudio is the officially recommended IDE for Android development. you can download and install the latest version of AndroidStudio on the official website.
3. Install Android Virtual Machine
Android virtual machine is the software used to simulate an Android device. It can be downloaded and installed in AndroidStudio.
Second, create the first Android app
1. Create a new project
Open AndroidStudio, click “StartanewAndroidStudioproject” to create a new Android project. In the “CreateNewProject” dialog box, fill in the project name, package name, project path and other information.
2. Select a template
In the “AddanactivitytoMobile” dialog box, select the template for the Android app you want to create. You can choose “EmptyActivity”, “BasicActivity”, “FullscreenActivity” and so on.
3. Configure your project
In the “Configureyourproject” dialog box, select the minimum SDK version to be used, the target SDK version, and so on. You can configure it according to your needs.
4. Run the project
Click the “Run” button, select the Android virtual machine you want to run, and wait for the project to finish compiling, then you can run your first Android app on the Android virtual machine.
Three, the development process of Android app
1. Interface design
The interface design of Android app is a very important part. You can use the layout editor provided by AndroidStudio to design the interface. The layout editor allows developers to design the interface by dragging and dropping components, which is very convenient.
2. Logic Writing
Logic writing for Android apps refers to the implementation of the app’s functionality. You can use Java language to write the logic code. In AndroidStudio, you can use Java language to write the business logic of the app and use XML language to write the layout file.
3. Testing and Releasing
After completing the development of the app, it needs to be tested and released. You can use the emulator provided by AndroidStudio for testing, or you can upload the app to the app market such as GooglePlay for publishing.
Four, Android app development skills
1. Use Fragment
Fragment is an important component in Android apps, which can divide the interface into multiple parts for easy management and maintenance. You can use Fragment to realize the multi-page function of the app.
2. Use RecyclerView
RecyclerView is an important component in Android app, which can realize list display and other functions. Using RecyclerView makes it easy to display large amounts of data and improves the performance of the app.
3. Use third-party libraries
There are many excellent third-party libraries available for Android app development. For example, Glide makes it easy to load images, Retrofit makes it easy to send network requests, and so on. Using third-party libraries can greatly improve development efficiency.
Android development what you need to learn
Learning in three stages:
1, Android Foundation Stage: Platform Architecture Features (JAVA/C) Market/Application Component Environment Build and Deployment/Packaging and Publishing AVD/DDMS/AAPT Debugging and Testing Related Resource Access/Resource Production Activity/Service/BroadcastReceiver/ContentProvider/Principles (life cycle) and deep implementation
2, Android Advanced Elementary: Component Widgets/BroadcastReceiver/ContentProvider/ Principles (life cycle) and deep implementation
2, Android Advanced Elementary: Component Widgets/Components Service/BroadcastReceiver/ContentProvider/principle (life cycle) and deep realization
2, Android advanced primary: component Widget/Menu/Menu/Layout Layout details Xml parsing (Pull/Dom/Sax)/JNI parsing SQL database principles,.
SQLite/SharedPreferences/File details multimedia Audio/Video/Camera details
3, Android advanced advanced: Bluetooth/WIFISMS/MMS applications to achieve a deep analysis of GPS principles.
The realization of LocationManager/LocationProvider for positioning/tracking/finding/convergence warnings and Geocoder forward and reverse coding and decoding and other technical details of the 2D graphics library (Graphics/View) details SDCARD/sensors/gesture application implementation
Body of knowledge
1, Unix/Linux platform technology: basic commands, the development environment under Linux