Android Weather Design

--Embedded software development

Name	Function module	Number of lines of code	Note
谢灿辉	widget	200	Desktop applet
Li Yangmin	GPS location, Baidu map API	100-150	Get your current City
Dingxiaofang	City Selection Activity , the weather API Get the weather	100-200	including database interaction

The software is a weather class application software, with widgets, start the software can be located in the city or manually set up after the implementation of weather query, PM2.5 query, 7 days temperature curve, we can show from the pictures and text of the last week's weather forecast and related warm tips.

The data is provided through a background service, which is acquired and stored in the database at a certain time interval through the API.

From the above can be seen the main features of this software are:

① launch the app widget app;

② set the interface, set the city to display the weather forecast;

③ detailed interface, through the picture text display the current week's weather forecast, warm hint and temperature curve change;

④ display interface, through the picture text display time, temperature and so on;

④ Sharing Interface

System Design

1. Module

   1. Display of weather forecasts

   In order to make the user's experience more convenient, we set the software as a small plug-in on the main face of the phone, the data used to display on the desktop. In the user interface, the (appwidget) Framework is used to provide intuitive interactive operations.

   Weather Widget Development steps:

   ① Layout of design widgets

   Res/layout/widget.xml Res/drawable/widget_background.xml

   The first step in creating a wiget is to design and implement the Wiget component layout, which is the interface between widgets and user interaction. Widgets are very similar to the layout design and implementation of the activity, which is the layout resource file of XML in the/res/layout directory.

   ② defining metadata for widgets

   Widget metadata file saved in/res/xml/weather_widget_4x2.xml

   ③ Implement widget Additions, deletions, updates

   the process of adding, deleting and updating widgets is implemented mainly through Appwidgetprovider class, the class itself inherits Broadcastreceiver, which is used to receive updates, deletions, and effective messages related to widgets. When appwidgetprovider receives these messages, the corresponding event handlers are called separately.

   description

   TD style= "PADDING-LEFT:7PX; padding-right:7px; Border-top:solid 0.5pt; Border-left:none; Border-bottom:solid 0.5pt; Border-right:solid 0.5pt ">

   event	calling function
   action_ Appwidget_update	onupdate ( )	widget update
   action_ appwidget_deleted	ondelete ( )	widget delete
   action_ appwidget_enabled	onenabled ()	widget effective
   Action_appwidget_disabled	Ondisabled ()	Widgets Failure

   ④ declaring widgets in the Androidmanifest.xml file

   /androidmanifest.xml

   For the widget to take effect it is also required to be declared in the Androidmanifest.xml file, which is primarily stated in the file Appwidgetprovider class

3. data interaction

   1. Use API to get weather data, data get address: http://sixweather.3gpk.net/ sixweather.aspx?city=%e5%b9%bf%e5%b7%9e

    

   Get the key code for the weather:

   com.yz.util/getweathertask.java

   Send an HTTP GET request to the weather interface

   server returns an XML document containing weather content

    

5. Custom Positioning City

   Code: Request Location permission

   Baidu Map API

7. User interaction

   Set up city (database read process)

   Com.yz.app

   Com.yz.db

9. System Management

   1. Page implementation Layout Management

   According to requirements analysis, the application should contain four main user interfaces. The display interface should contain information such as City, temperature and time, and the detailed interface contains three interfaces, namely, the weather center, warm cue and temperature curve, which includes the current and the following six days of weather forecast, temperature trend and other information; Set the interface, mainly for the user to manually query the city weather forecast The sharing interface provides the ability to share the weather forecast information.

   Picture:

   Span style= "color:red; Font-size:7pt ">/res/layout/activit_weather_center.xml

    

   sharing channel/assets/platforms.xml

    

   2. Background service (update on Wake-up device)

11. Database design and implementation (manually specified location situation)

    City.db-> get weather API for City-weather

    Six, the program module design

    From this functional requirement we have divided the entire program into four functional modules:

    ① program Startup

    ② user Interface

    ③ Backstage Service

    ④ Database Adapter

Android Weather Design