![ACADGILD
1. Some attributes have values that can be displayed to users — for example, a label and
an icon for an activity.
• The values of these attributes should be localized and therefore set from a resource
or theme.
• Resource values are expressed in the following format : @[package:]type:name
2. The package name can be omitted if the resource is in the same package as the
application, type is a type of resource — such as "string" or "drawable" — and name is
the name that identifies the specific resource.
• For example: <activity android:icon="@drawable/smallPic" . . . >
3. Values from a theme are expressed in a similar manner, but with an initial '?' rather
than '@‘.
• For Example: ?[package:]type:name
Resources
6Fundamentals of Android Applications](https://image.slidesharecdn.com/androidapplicationfundamentalsv1-160308074413/85/Android-Application-Fundamentals-6-320.jpg)
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Android Application Fundamentals
- 2. ACADGILD Project Structure Android Manifest Resources Types of Resources Core Component – Activity Activity Life Cycle Summary Contents 2Fundamentals of Android Applications
- 3. ACADGILD . 1.idea - the project specific metadata is stored by Android Studio. 2. Project Module (application) - This is the project folder where your application code resides. Its sub directories are: 1. build: This has all the output of the make process i.e. classes.dex, compiled classes, and resources, etc. 2. libs : This is a commonly seen folder in eclipse land too, which optionally can hold the libraries or .jar files. 3. src: The src folder can have both application code (main) & android unit test script(“androidTest”). The java folder contains all the java codes and res contains drawables, layouts, etc. 3. Gradle - This is where the gradle build system’s jar wrapper i.e. this jar is how Android System communicates with gradle installed in OS 4. External Libraries - A place where Referenced Libraries are found and also target SDK Platform Project Structure 3Fundamentals of Android Applications 1 2 3 4 a b c
- 4. ACADGILD • Metadata of Android Application. • Syntax : <manifest> <!-- Elements for Application properties should come here --> <application> <!-- Elements for application components should come here --> </application> </manifest> Android Manifest 4Fundamentals of Android Applications
- 5. ACADGILD • Resources are the additional files and static content that your code uses. • For any type of resource, you can specify default and multiple alternative resources for your application. Resources 5Fundamentals of Android Applications
- 6. ACADGILD 1. Some attributes have values that can be displayed to users — for example, a label and an icon for an activity. • The values of these attributes should be localized and therefore set from a resource or theme. • Resource values are expressed in the following format : @[package:]type:name 2. The package name can be omitted if the resource is in the same package as the application, type is a type of resource — such as "string" or "drawable" — and name is the name that identifies the specific resource. • For example: <activity android:icon="@drawable/smallPic" . . . > 3. Values from a theme are expressed in a similar manner, but with an initial '?' rather than '@‘. • For Example: ?[package:]type:name Resources 6Fundamentals of Android Applications
- 7. ACADGILD Animation Resources • Tween animations are saved in res/anim/ and accessed from the R.anim class. • Frame animations are saved in res/drawable/ and accessed from the R.drawable class. Color State List Resource • Define a color resources that changes based on the View state. • Saved in res/color/ and accessed from the R.color class. Drawable Resources • Define various graphics with bitmaps or XML. • Saved in res/drawable/ and accessed from the R.drawable class. Layout Resource • Define the layout for your application UI. • Saved in res/layout/ and accessed from the R.layout class. Type of Resources 7Fundamentals of Android Applications
- 8. ACADGILD Menu Resource • Define the contents of your application menus. • Saved in res/menu/ and accessed from the R.menu class. String Resources • Define strings, string arrays, and plurals (and include string formatting and styling). • Saved in res/values/ and accessed from the R.string, R.array, and R.plurals classes. Style Resource • Define the look and format for UI elements. • Saved in res/values/ and accessed from the R.style class. More Resource Types • Define values such as booleans, integers, dimensions, colors, and other arrays. • Saved in res/values/ but each accessed from unique R sub-classes (such as R.bool, R.integer, R.dimen, etc.) Type of Resources 8Fundamentals of Android Applications
- 9. ACADGILD Activity Every screen in an Android application is an Activity. Activity will always have a User Interface (abbreviated as UI). It is not possible to have an Activity without a UI. Core Component Activity 9Fundamentals of Android Applications
- 10. ACADGILD Activity Life Cycle 10Fundamentals of Android Applications Save Important Data
- 11. ACADGILD We have seen the initial project structure – AndroidManifest, – Resources. Activity and its Life Cycle. Importance of onPause method. Summary 11Fundamentals of Android Applications
- 12. ACADGILD Glossary 12 Terms Description Tween animation Creates an animation by performing a series of transformations on a single image with an Animation Frame animation Creates an animation by showing a sequence of images in order with an AnimationDrawable.