View groups containers

Topics ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

View ,[object Object],[object Object],[object Object]

ViewGroups / Containers / Layouts ,[object Object],[object Object],[object Object]

View ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Two ways of defining layouts ,[object Object],[object Object],[object Object]

XML definitions of layouts ,[object Object],[object Object]

Accessing UI elements from XML ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Instantiate layout elements at runtime . ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Attributes ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Layout attributes ,[object Object],[object Object]

Layout attributes ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

LinearLayout ,[object Object],[object Object],[object Object]

LinearLayout - Attributes ,[object Object],[object Object],[object Object]

layout_weight ,[object Object]

layout_weight -- Proportinate fill ,[object Object]

layout_gravity, gravity ,[object Object],[object Object],[object Object],[object Object],[object Object]

layout_margins, padding ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

RelativeLayout ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

RelativeLayout ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

RelativeLayout ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

FrameLayout ,[object Object],[object Object],[object Object],[object Object],[object Object]

Important attributes ,[object Object],[object Object],[object Object],[object Object]

LinearLayout Vs RelativeLayout ,[object Object],[object Object],[object Object],[object Object],[object Object]

Layouts / Containers Heirarchy viewer: android-sdk/tools# ./hierarchyviewer

layoutopt tool ,[object Object],[object Object]

Reference links ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Home screen widgets ,[object Object],[object Object],[object Object],[object Object]

What is an App Widget?? ,[object Object]

Appwidget usages ,[object Object],[object Object],[object Object]

AppWidget Framework ,[object Object],[object Object],[object Object],[object Object]

AppWidget Framework ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Steps for Building an App Widget ,[object Object],[object Object],[object Object],[object Object]

1. Declare AppWidgetProvider in Manifest ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

2. Create App Widget Provider Info Metadata XML file ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

3. Create App Widget Layout ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

4. Write AppWidgetProvider Class ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

AppWidget provider - onUpdate ,[object Object],[object Object],[object Object],[object Object]

Use AlarmManager to update ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Service ,[object Object],[object Object],[object Object],[object Object]

Remoteviews ,[object Object],[object Object],[object Object]

Overview of AppWidget mechanism

Multiple sized widgets ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Things to keep in mind ,[object Object],[object Object],[object Object],[object Object],[object Object]

Location based map ,[object Object],[object Object],[object Object],[object Object]

Implementation overview OnUpdate / onDeleted Pass AppWidgetId startService(intent) updateWidget(AppWidgetId, remoteview) Service LocationIdentifier – GPS/Wifi Fetch the map updateWidget(AppWidgetId, remoteview) updateWidget(AppWidgetId, remoteview) OnUpdate / onDeleted Pass AppWidgetId startService(intent) OnUpdate / onDeleted Pass AppWidgetId startService(intent) Gogle static map Latitude,longitude Spwan a thread AppWidget AppWidget AppWidget Maintains list of AppWidgetIds, AppwidgetType 3 5 6 6 1 4 9 2

Demo snapshot 2x2 - 147dp width, 144dp height 4x2 - 294dp width, 144dp height

To try out in demo ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Reference links ,[object Object],[object Object],[object Object],[object Object],[object Object]

Thank you Mani.S Email: smanikandan14@gmail.com http://iserveandroid.blogspot.com/

View groups containers

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