android manifest application class

? Android. content. Context? Android. content. ContextWrapper? Android. app. Application The android. app. Application class contains four public methods. Void onConfigurationChanged (C

When the Android program starts, the system creates a Application object to store some information about the system. Usually we do not need to specify a application, then the system will automatically help us to create, if you need to create their own application, it is easy to create a

Version control is an important part in the process of program upgrade/maintenance. You need to know the version of the application installed on the device and the versions that can be upgraded. Other applications-including other programs you release-need to query the system for the version of your application to determine the compatibility between them. You may also need to query the ve

types of software, and the SDK typically contains relevant documentation, examples, and tools.The SDK can be divided into the System SDK and the Application SDK. The so-called System SDK is a collection of development tools for specific software packages, software frameworks, hardware platforms, operating systems and other CV applications. The application SDK is based on the System SDK developed independen

both of the above, you can tell that the application was cut from the foreground to the background by counting count 0. Similarly, cutting from the background to the front desk is similar. Look at the code behind the concrete implementation. But if not all of the activity in the project inherits from the same baseactivity, this functionality is not possible. Fortunately, Android, after API 14, in the

; - categoryAndroid:name= "Android.intent.category.LAUNCHER" /> the Intent-filter> - Activity> - Application> - Manifest>In the Activity node, we can see Android:name= ". Mainactivity "Here corresponds to the com.rongma.helloworld.MainActivity file. That is, the mainactivity file was registered.After each page is newly created, it needs to be registered under the

Broadcast Mechanism: How the sender receives and processes data no matter whether the receiver receives the data 1. To receive broadcast, you must first create a class that inherits from broadcastreceiver and rewrite its onreceive method. 2. Register in the manifest file and set the action filter. You can also register in the application code. The life cycle of b

Alibaba Android interview analysis: tracking and analysis of android application crash (crash) issues, Alibaba Security Android I. Problem DescriptionA Crash (Crash) occurs when a client program exits the application when it encounters an exception or error that cannot be ha

It's been a long time studying Android, but I don't know much about appliction. Take some time today to study the application.What is ApplicationApplication and Actovotu,service are a system component of the Android framework, and when the Android program starts, a Application object is created to store some informatio

, the system starts a process for the app (if not run) and instantiates the class required by the component, for example: when your app wants to get photos through system photography, the activity that runs in the process belongs to the Camera app rather than your app. Therefore, Android applications do not have an entry point (for example, main ()). Activated Components

The purpose of adding hardware services to the Android system is to enable app-tier apps to access hardware services through the Java interface. So how does app access the hardware services provided by the application frameworks layer through the Java interface? In this article, we'll add a built-in application to the Android