Android JET Navigation
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The document discusses Android Jetpack Navigation and best practices for applying it. It introduces key concepts like destinations, actions, the NavController, safe args plugin, and deep linking. It emphasizes principles like using the back button and up button properly, defining a navigation graph with fragments/activities as destinations and connections as actions, navigating via the NavController, and passing arguments safely between destinations with the safe args plugin. The document concludes that following these practices helps developers build apps that apply navigation best practices.
Android JET Navigation
- 2. Who I am - @mbonifazi ● Android developer since Eclair ● GDE...what else? A high carb addicted ● I hate MS Office & Jira notifications My best quote: Day by day is the best way
- 4. Headlines ➔ How we were & are ● How we wanna be ● How we apply best practices
- 7. Activity added in API level 1
- 8. val intent = Intent(this, DisplayMessageActivity::class.java).apply { putExtra(EXTRA_MESSAGE, message) } startActivity(intent)
- 9. <activity android:name="com.example.android.GizmosActivity" android:label="@string/title_gizmos" > <intent-filter android:label="@string/filter_view_http_gizmos"> <action android:name="android.intent.action.VIEW" /> <category android:name="android.intent.category.DEFAULT" /> <category android:name="android.intent.category.BROWSABLE" /> <data android:scheme="https" android:host="www.example.com" android:pathPrefix="/gizmos" /> </intent-filter>
- 10. Fragment added in API level 11 Deprecated since API level 28
- 11. companion object { @JvmStatic fun newInstance(param1: String, param2: String) = BlankFragment().apply { arguments = Bundle().apply { putString(ARG_PARAM1, param1) putString(ARG_PARAM2, param2) } } }
- 12. val detailsFragment = DetailsFragment.newInstance(comic) supportFragmentManager.beginTransaction() .replace(R.id.root_layout, detailsFragment, "rageComicDetails") .addToBackStack(null) .commit()
- 13. Headlines ● How we were & are ➔ How we wanna be ● How we apply Best practices
- 14. Android Jetpack
- 20. Back button Up button
- 22. def nav_version = "1.0.0-alpha05" implementation "android.arch.navigation:navigation-fragment-ktx:$nav_version" implementation "android.arch.navigation:navigation-ui-ktx:$nav_version"
- 26. <navigation xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" app:startDestination="@+id/home_dest"> <!-- ...tags for fragments and activities here --> </navigation>
- 27. Destinations
- 31. Action
- 34. NavController
- 37. val options = navOptions { anim { enter = R.anim.slide_in_right exit = R.anim.slide_out_left popEnter = R.anim.slide_in_left popExit = R.anim.slide_out_right } } view.findViewById<Button>(R.id.navigate_destination_button)?.setOnClickListener { findNavController().navigate(R.id.flow_step_one_dest, null, options) }
- 40. val flowStepNumber = arguments?.getInt("flowStepNumber")
- 41. val safeArgs = FlowStepFragmentArgs.fromBundle(arguments) val flowStepNumber = safeArgs.flowStepNumber
- 42. Deep linking
- 44. <activity android:name=".MainActivity"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.DEFAULT" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> <nav-graph android:value="@navigation/mobile_navigation" /> </activity>
- 45. Headlines ● How we were & are ● How we wanna be ➔ How we apply best practices
- 47. References ● https://github.com/googlesamples/android-sunflower ● https://www.youtube.com/watch?v=2k8x8V77CrU ● https://www.youtube.com/watch?v=7p22cSzniBM ● https://developer.android.com/topic/libraries/architecture/navigation/ ● https://bit.ly/2PNQbb7 Codelab: https://codelabs.developers.google.com/codelabs/android-navigation [email protected] - @mbonifazi