FIT2081 Lecture Notes - Lecture 2: Open Handset Alliance, Android Studio, Manifest File

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orchidbutterfly530

12 Jun 2018

School

Monash University

Department

Information Technology

Course

FIT2081

Professor

All Professors

For unlimited access to Class Notes, a Class+ subscription is required.

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Why$and$how$does$API$fragmentation$happen?

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Activities$VS$Services$in$Android:

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Activity$Intent$main$usage

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What$is$the$easiest$way$to$update$various$characteristics$of$app$without$

modifying$code,$if$developing$an$app$targeting$devices$with$small$and$

large$screen$sizes?

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To$reference$a$resource$from$your$app$code,$what$should$you$use?

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Consider$an$app$compiled$against$API$level$22$on$a$device$running$Nougat.

This$usually$works.$Why?

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How$could$this$go$wrong?

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Can$it$be$fixed$without$changing$API$level$of$the$app$or$device?$Explain.

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Consider$an$app$compiled$against$API$25$on$a$device$running$Lollipop.

How$could$this$go$wrong?

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If$it$goes$wrong,$can$it$be$fixed$always$or$sometimes?$Under$what$

circumstances$can$it$be$fixed?

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An$Android$app$needs$to$store$its$data$in$a$relational$db$and$share$it$with$

other$apps.$What$components$and$classes$do$you$need?

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Document Summary

= a layout that arranges other views either horizontally in a single column, or vertically in a single row layout_width/height paddingleft/right orientation gravity. = a user interface element for entering and modifying text android:id. Provides unique identifier for the view, which can be used to reference the obj frm the app code (to read, manip obj) android:layout_height/width android:inputtype=text = consist of a text or icon (or both) that communicates what actions occurs when the user touches it android:layout_height/width android:text=@string/button_text android:src=@drawable/button_icon android:drawableleft=@drawable/button_icon android:drawableleft=@drawable/button_icon button. setonclicklistener(new view. onclicklistener() { public void onclick (view v) { Intent getintent(intent intent) returns the intent that started this activity intent. getstringextra(string s) obtains query string from intent. action_search intent. putextra(string key,[anything] value) puts extra data to be transferred with the intent. Can send from one app to another even if other app isn"t running. Implicit: states type of action to perform or provides data of a specific type on which the action is to be performed.

FIT2081 Lecture Notes - Lecture 2: Open Handset Alliance, Android Studio, Manifest File

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