What Material Design means to Android

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What Material means to Android

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Agenda • Why do we need it? • What is Material Design? • New patterns • How do I start?

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+DavidGonzalezMalmstein malmstein David González Technical Product Owner at Novoda @dggonzalez Google Developer Expert for Android

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Why? Bad user experience Bad platform experience Design inconsistency

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Material Design

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Goals Uniﬁed experience across platforms and different device sizes Visual language that synthesises classic principles of good design Provide guidelines in order to create appealing Android applications

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Material is a metaphor Bold, graphic, intentional Motion provides meaning Material principles

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Elevation

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Raised elevation

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Elevation 15 view.animate().translationZ(5).start(); res/layout/fragment_sample.xml SampleFragment.java

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Outline 16   res/drawable/myrect.xml res/layout/fragment_sample.xml

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17 static class OvalOutlineProvider extends ViewOutlineProvider{ @Override  public void getOutline(View view, Outline outline) { outline.setOval(0, 0, view.getWidth(), view.getHeight(), 10); } } OvalOutlineProvider.java

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Deﬁne your own one view.setClipToOutline(true);  view.setOutlineProvider(new RoundRectOutlineProvider());

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Cards (only if you need them)

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20 res/layout/view_card.xml  

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Color palette

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Primary and Accent color

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24 res/layout-v21/theme.xml   <item name="android:colorPrimary">@color/primary</item> <item name="android:colorAccent">@color/accent</item> <item name=“android:colorPrimaryDark">@color/primary_dark</item> SDK 21 and above

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25 res/layout/theme.xml   <item name="colorPrimary">@color/primary</item>  <item name="colorAccent">@color/accent</item>  <item name="colorPrimaryDark">@color/primary_dark</item>  SDK 7 and above

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Palette API 27 dependencies { compile ‘com.android.support:palette-v7:21.0.+' } build.gradle Palette p = Palette.generate(bitmap);   Palette.generateAsync(bitmap, new Palette.PaletteAsyncListener() { public void onGenerated(Palette palette) { // Do something with colors…} } ); MainFragment.java

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Toolbar

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Toolbar in Material 29 Toolbar toolbar = (Toolbar) findViewById(R.id.my_awesome_toolbar); setActionBar(toolbar); res/layout/toolbar.xml MainActivity.java

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Toolbar in AppCompat 30 Toolbar toolbar = (Toolbar) findViewById(R.id.my_awesome_toolbar);   setSupportActionBar(toolbar);   res/layout/toolbar.xml MainActivity.java

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Nav Drawer • Bulleted list • Bulleted list • Bulleted list

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Swipe to refresh

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Touch feedback

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34 res/drawable/item_bg.xml

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Reveal effect Animator anim = ViewAnimationUtils. createCircularReveal( myView, centerX, centerY, startRadius, finalRadius);   anim.start(); MyActivity.java

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MyActivity.java final View myView = findViewById(R.id.my_view); Animator anim = ViewAnimationUtils.createCircularReveal(myView, cx, cy, initialRadius, 0); anim.addListener(new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animation) { super.onAnimationEnd(animation); myView.setVisibility(View.INVISIBLE); } }); anim.start();

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Animate View state changes

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38 res/drawable/mystatedrawable.xml

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Vector drawables 39 res/layout/fragment_heart.xml

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40 res/drawable/heart.xml

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Animated vector drawables 41 res/layout/fragment_animated_vd.xml @Override public void onClick(View v) { ((AnimatedVectorDrawable) iv.getBackground()).start(); } MainActivity.java

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42 res/drawable/vectordrawable.xml

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43 res/drawable/avd.xml res/anim/path_morph.xml res/anim/rotation.xml

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Transitions

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Enable transitions 45 getWindow(). requestFeature(Window.FEATURE_CONTENT_TRANSITIONS);  <item name="android:windowContentTransitions">true</item> res/values/theme.xml MainActivity.java

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Activity transition 46  <item name=“android:windowEnterTransition"> @transition/explode</item> <item name=“android:windowExitTransition”> @transition/explode</item> res/values/theme.xml The easy way

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Activity transition 47 getWindow().setExitTransition(new Explode()); startActivity(intent, ActivityOptions. makeSceneTransitionAnimation(this).toBundle( )); MainActivity.java MainActivity.java

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Shared element transition 48  <item name=“android:windowSharedElementEnterTransition”> @transition/change_image_transform</item> <item name=“android:windowSharedElementExitTransition”> @transition/change_image_transform</item> res/values/theme.xml The hard way

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Shared element transition 49 res/layout/fragment_sample.xml res/transition/my_transition.xml

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Start the Activity 50 imgContainerView.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { Intent intent = new Intent(this, Activity2.class); ActivityOptions options = ActivityOptions .makeSceneTransitionAnimation(this, androidRobotView, transitionName); startActivity(intent, options.toBundle());  FragmentSample.java

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How to start

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Learn the theory

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Look for inspiration

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Practice on Paper

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Priorities

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Iterate, and do it fast

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Questions? Thank you!

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Further reading • Novoda Blog on Material Design • Material Design Guidelines • Intro to Material Design • Material Design Checklist • Material Design for Pre-Lollipop with AppCompat • Nick Butcher and Chris Banes at Droidcon UK 2014