Familja Java dhe J2ME

In Eclipse, go to Help -> Install New Software

• In Eclipse, go to Help -> Install New Software

• Click ‘Add’ in top right

• Enter:

• Name: ADT Plugin
• Location: https://dl-ssl.google.com/android/eclipse/

• Click OK, then select ‘Developer Tools’, click Next

• Click Next and then Finish

• Afterwards, restart Eclipse

• Specify SDK location (next 3 slides)

• Must do this every time start a new project in a new location (at least in Windows)

Need

• Need

• the

• items

• circled

• Then

• click

• Finish

src – your source code

• src – your source code

• gen – auto-generated code (usually just R.java)

• Included libraries

• Resources

• Drawables (like .png images)
• Layouts
• Values (like strings)

• Manifest file

Used to define some of the resources

• Used to define some of the resources

• Layouts (UI)
• Strings

• Manifest file

• Shouldn’t usually have to edit it directly, Eclipse can do that for you

• Preferred way of creating UIs

• Separates the description of the layout from any actual code that controls it
• Can easily take a UI from one platform to another

Auto-generated: you shouldn’t edit it

• Auto-generated: you shouldn’t edit it

• Contains IDs of the project resources

• Enforces good software engineering

• Use findViewById and Resources object to get access to the resources

• Ex. Button b = (Button)findViewById(R.id.button1)
• Ex. getResources().getString(R.string.hello));

Eclipse has a great UI creator

• Eclipse has a great UI creator

• Generates the XML for you

• Composed of View objects

• Can be specified for portrait and landscape mode

• Use same file name, so can make completely different UIs for the orientations without modifying any code

Click ‘Create’ to make layout modifications

• Click ‘Create’ to make layout modifications

• When in portrait mode can select ‘Portrait’ to make a res sub folder for portrait layouts

• Likewise for Landscape layouts while in landscape mode
• Will create folders titled ‘layout-port’ and ‘layout-land’

• Note: these ‘port’ and ‘land’ folders are examples of ‘alternate layouts’, see here for more info

• http://developer.android.com/guide/topics/resources/providing-resources.html

• Avoid errors by making sure components have the same id in both orientations, and that you’ve tested each orientation thoroughly

In res/values

• In res/values

• strings.xml

• Application wide available strings

• Promotes good software engineering

• UI components made in the UI editor should have text defined in strings.xml

• Strings are just one kind of ‘Value’ there are many others

Contains characteristics about your application

• Contains characteristics about your application

• When have more than one Activity in app, NEED to specify it in manifest file

• Go to graphical view of the manifest file
• Add an Activity in the bottom right
• Browse for the name of the activity

• Need to specify Services and other components too

• Also important to define permissions and external libraries, like Google Maps API

Activity

• Activity

• http://developer.android.com/guide/topics/fundamentals/activities.html

• Service

• http://developer.android.com/guide/topics/fundamentals/services.html

• Content Providers

• Broadcast Receivers

• Android in a nutshell:

• http://developer.android.com/guide/topics/fundamentals.html

The basis of android applications

• The basis of android applications

• A single Activity defines a single viewable screen

• the actions, not the layout

• Can have multiple per application

• Each is a separate entity

• They have a structured life cycle

• Different events in their life happen either via the user touching buttons or programmatically