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Support·Library:¬ Guts·&·Glory#
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+ChrisBanes @chrisbanes +AdamWPowell @adamwp
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What? Why? Gotchas? How? Bugs?
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What?¬
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support-v4 support-v13 AppCompat MediaRouter CardView RecyclerView Palette Leanback What’s·included¬
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MediaRouter CardView RecyclerView Palette Leanback Annotations Design Percent Preferences customtabs What’s·included¬
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Rough hierarchy support-v4/v13 appcompat recyclerview mediarouter leanback design preferences palette customtabs cardview gridlayout
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palette customtabs cardview gridlayout Independent feature libraries They may still depend on other libraries
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The core support-v4/v13 Shims, shims everywhere: ViewCompat.animate()
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The core support-v4/v13 Backports: FragmentActivity.getSupportFragmentManager()
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The core support-v4/v13 Features:
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Infrastructural support-v4/v13 recyclerview
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Polyfills support-v4/v13 appcompat Backports large chunks of the UI Toolkit
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Polyfills support-v4/v13 appcompat Backports large chunks of the UI Toolkit recyclerview
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High-level componentry support-v4/v13 appcompat recyclerview mediarouter leanback design preferences High-level components Easy, turnkey, implement current UX policy.
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Why?¬
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Unbundled releases * Not tied to platform releases * Bug fixes * New features
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RecyclerView * Component providing data-set windowing * Improves upon similar framework components * Supports nested scrolling back to API v7
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Animation Pluggable Enforcing RecyclerView See ‘RecyclerView Animations And Behind The Scenes’
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Animation Pluggable Enforcing RecyclerView * LayoutManager * ItemDecoration * ItemAnimator * RecycledViewPool
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Animation Pluggable Enforcing RecyclerView Enforces good practices: * ViewHolder * Create -> bind pattern * Minimal data set changes
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AppCompat * UI compatibility layer for v7+ * Backports framework features, but no more * Goal: stay up to date with the framework
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AppCompat Themes Toolbar Tinting
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AppCompat Themes Toolbar Tinting res/values/themes.xml
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AppCompat Themes Toolbar Tinting res/layout/my_layout.xml
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AppCompat Themes Toolbar Tinting
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AppCompat Themes Toolbar Tinting <item name="colorPrimary">...</item> <item name="colorPrimaryDark">...</item> <item name=“colorAccent">...</item> <item name=“colorControlNormal">...</item> <item name="colorControlActivated">...</item> res/values/themes.xml
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Design * UI feature library * Provides features not in the framework * Goal: implement high-value UI components
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FloatingActionButton NavigationView Snackbar TabLayout Design
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FAB NV Snackbar TL Design
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FAB NV Snackbar TL Design
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FAB NV Snackbar TL Design res/layout/my_layout.xml
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FAB NV Snackbar TL Design
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FAB NV Snackbar TL Design res/layout/drawer_content.xml
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FAB NV Snackbar TL Design res/layout/drawer_content.xml
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FAB NV Snackbar TL Design MyActivity.java Snackbar.make(view, "Here’s a…", LENGTH_LONG) .setAction("Undo", ...) .show();
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FAB NV Snackbar TL Design
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FAB NV Snackbar TL Design res/layout/my_layout.xml
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FAB NV Snackbar TL Design ViewPager viewPager = ...; PagerAdapter pagerAdapter = ...; viewPager.setAdapter(pagerAdapter); tabLayout.setupWithViewPager(viewPager); MyActivity.java
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FAB NV Snackbar TL Design ViewPager viewPager = ...; PagerAdapter pagerAdapter = ...; viewPager.setAdapter(pagerAdapter); tabLayout.setupWithViewPager(viewPager); MyActivity.java
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Percent * UI feature library * Provides percent based layouts * FrameLayout and RelativeLayout
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50% 50% Percent
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Percent
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Percent
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Gotchas¬
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Compile SDK Library major version number 23 compileSdkVersion is the minimum compile sdk version .1.1 23 v
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Compile SDK Library major version number 24 compileSdkVersion is the minimum compile sdk version .0.0 24 v
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65 536 , dex method limit
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5,318 AppCompat
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5,318 AppCompat v4 10,883
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5,318 AppCompat v4 10,883 16,201 Total
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5,318 AppCompat v4 10,883 18,365 Total design 2,164
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5,318 AppCompat v4 10,883 20,569 Total design 2,164 recyclerview 2,204
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Sounds scary, right? 20 569 ,
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Example: Cheesesquare https://github.com/chrisbanes/cheesesquare android.support.* 16,241 false minifyEnabled
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Example: Cheesesquare 8,431 true minifyEnabled android.support.* https://github.com/chrisbanes/cheesesquare
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How?¬
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dependencies { compile "com.android.support:appcompat-v7:23.1.1" }
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compile "com.android.support:design:22.1.1" compile "com.android.support:palette-v7:21.0.0" compile "com.android.support:customtabs:23.1.1" compile "com.android.support:gridlayout-v7:23.1.1" dependencies { compile "com.android.support:appcompat-v7:23.1.1" }
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ext { supportLibVersion = '23.1.1' } com.android.support:appcompat-v7:${supportLibVersion} Top tip
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dependencies { compile "com.android.support:appcompat-v7:${supportLibVersion}" compile "com.android.support:design:${supportLibVersion}" compile "com.android.support:palette-v7:${supportLibVersion}" compile "com.android.support:customtabs:${supportLibVersion}" compile "com.android.support:gridlayout-v7:${supportLibVersion}" } Top tip ext { supportLibVersion = '23.1.1' }
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Bugs?¬ Nope, the code is perfect
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http://b.android.com
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+ChrisBanes @chrisbanes +AdamWPowell @adamwp