Android

The content provider Manages access to the core resource library of data. The provisioner is an android application.ProgramIt often provides its own UI to work with data. However, the main purpose of the content provider is to provide other

  Android contains a group of C/C ++ class libraries used by various components of the Android system. These class library functions are exposed to developers through the Android Application Framework. Some core class libraries are listed below:

Android puts all started activities in the same stack as the previous one for management. For most applicationsProgramThis method works well, and you don't have to worry about how the activity is associated with the task or how they exist in the

It is very simple to put Code directly. Package COM. example. demogame; import Java. io. file; import Java. io. fileinputstream; import android. app. activity; import android. OS. bundle; import android. view. view; import android. widget. button;

private LocationManager locationManager; Locationmanager = (locationmanager) getsystemservice (context. location_service); locationmanager. requestlocationupdates (locationmanager. gps_provider, 1000, 5, new mylocationlistener (); location =

Below I will list some important points: The design model provides solutions to solve many software engineering problems. There are three categories based on the purpose of the Mode:1. Creation Mode: it is related to object creation.2. Structured

Android webview Cache The webview control is often used in projects. When an HTML page is loaded, the database and cache folders are generated under the/data/application package directory, as shown in: The requested URL record is saved in

  You can call startactivity () to start another activity. When you call this method, you must pass it an intent that describes the activity you want to start as a parameter. This intent can specify the activity you want to start or the description

This article translated from: http://developer.android.com/guide/topics/location/strategies.html Let your application know the user's location and send better information to the user more intelligently. When developing an android Location Awareness

The User Interface of an activity is provided through the view tree-these view objects inherit the View class. Each View Controls a specific rectangular area in the activity window and can respond to user operations. For example, a button can start

A style is a set of attributes that specify the appearance and format for the view or window. A style can specify attributes such as height, margin, font color, font size, and background color. Styles are defined in an XML resource file separated

Application resources, slices, and strings should always be placed outside the code so that they can be maintained independently. When resources are put externally, you can also provide optional resources that support special device configurations,

This article translated from: http://developer.android.com/training/basics/intents/result.html Starting another activity is not one-way. You can start another activity and accept the results returned by the started activity. You need to call

Use plug-in The plug-in defines how to specify the computing value used for the time function in the animation. For example, if you specify a linear playing animation throughout the animation period, it means that the animation moves evenly

Input Method API Classes with IME can be found in the Android. inputmethodservice and Android. View. inputmethod packages. The keyevent class is critical for handling keyboard characters. The core part of IME is the service component, which inherits

List and metadata of the spell checker In addition to the code, you also need to provide the Spelling Checker with the corresponding configuration file and metadata file. The configuration file defines applications, services, and activities used to

This article translated from: http://developer.android.com/training/basics/supporting-devices/screens.html Android uses two attributes to classify the screen of a device: size and density. You should imagine the device screen size and density range

This article translated from: http://developer.android.com/guide/topics/sensors/sensors_overview.html Most Android devices have built-in sensors for measuring motion, direction, and various environmental conditions. These sensors provide raw data

This article translated from: http://developer.android.com/training/camera/videobasics.html This article describes how to use the existing Camera application to take videos. If your application only needs to integrate a small part of the video

The operation column is a window that identifies the application and user location, and provides users with operation and navigation modes. In most activities that need to highlight user operations or global navigation, you should use the operation