Index

A

abortAnimation(), 370

AbsListView class, 284

AbsoluteLayout, 62

AbsoluteSizeSpan, 295

AccelerateDecelerateInterpolator class, 239

AccelerateInterpolator class, 239

accessible vocabulary, 182

action bar. see app bar

ActionBarCompat library, 70

activity transitions, 255–259

Adapter class, 60–61

AdapterViewAnimator, 62

AdapterView class, 57

interfaces for, 61

AdapterViewFlipper, 62

add, PorterDuff image compositing mode, 322

Adobe Illustrator, 118, 168–169

AlignmentSpan.Standard, 295

alpha, View class attribute, 28

Amazon Appstore, 401

ambient light, 171

AnalogClock, 45–46

Android Asset Studio, 390–395

Android design website, 13

android:state_activated, 89

android:state_checkable, 89

android:state_checked, 89

android:state_enabled, 89

android:state_focused, 89

android:state_hovered, 90

android:state_pressed, 90

android:state_selected, 90

android:state_window_focused, 90

angle, ShapeDrawable class attribute, 94

AnimatedVectorDrawable class, 98–100

animations, 104

form errors, 242–246

icons, 246–251

and Material Design, 11–12

property. see property animations

purpose of, 232

view, 232–233

AnimatorListener class, 235

animator (qualifier), 76

anim (qualifier), 76

AnticipateInterpolator class, 239

AnticipateOvershootInterpolator class, 239

app bar, 21–22

AppCompat library, 70–71

Apple, 170

application description, Google Play, 388

application icon, Google Play, 389–395

apps

Camera app, 15

Contacts app, 14–15

Gallery app, 15

Paper Camera, 400

Permission Informant, 175

promoting apps, 400–401

AppWidgetHostView, 62

arrays, 103

attributes, ShapeDrawable class, 94–95

angle, 94

bottom, 95

bottomLeftRadius, 94

bottomRightRadius, 94

centerColor, 94

centerX, 94

centerY, 94

color, 95

dashGap, 95

dashWidth, 95

endColor, 94

gradientRadius, 95

height, 95

innerRadius, 94

innerRadiusRatio, 94

left, 95

radius, 94

right, 95

shape, 94

startColor, 95

thickness, 94

thicknessRatio, 94

top, 95

topLeftRadius, 94

topRightRadius, 94

type, 95

useLevel, 94

width, 95

attributes, TextView class, 36–38

drawable, 36

ellipsize, 36

fontFamily, 36

gravity, 36

hint, 36

inputType, 36

lines, 37

lineSpacing, 37

maxLines, 37

minLines, 37

shadowColor, 37

shadowDx, 37

shadowDy, 37

shadowRadius, 37

text, 37

textColor, 37

textIs, 37

textSize, 37

textStyle, 37

typeface, 37

attributes, VectorDrawable class, 97–98

attributes, View class

alpha, 28

background, 29

content, 29

duplicate, 29

focusable, 29

id, 29

importantFor, 29

minHeight, 29

minWidth, 29

padding, 30

visibility, 30

attrs.xml, 409

AutoCompleteTextView, 42

available height, 78

available width, 78

B

back button, 19

background, View class attribute, 28

BackgroundColorSpan, 296

backgrounds, 39–40

Balsamiq, 119

bending to user, core principles, 19

better text drawable, 308–310

Bitmap class, 311, 338–339

BitmapShader, 325–328

bottom, ShapeDrawable class attribute, 95

bottomLeftRadius, ShapeDrawable class attribute, 94

bottomRightRadius, ShapeDrawable class attribute, 94

BounceInterpolator class, 239

breaking comps into views, 200–201

brightness, 173

Button class, 39

C

cache, images, 277–283

CalendarView, 42

Camera app, 15

Canvas class, 305

capitalization, text, 180

CardView library, 71–72

centerColor, ShapeDrawable class attribute, 94

centerX, ShapeDrawable class attribute, 94

centerY, ShapeDrawable class attribute, 94

change log, Google Play, 389

CharSequence class, 236–238

CheckBox, 42

CheckedTextView, 42

Chronometer, 46

circular reveal transitions, 259–262

clear, PorterDuff image compositing mode, 316

ClickableSpan, 296

ClipDrawable class, 92–93

CMYK (cyan, magenta, yellow, and black), 172

color, ShapeDrawable class attribute, 95

Color (Adobe’s tool), 177

color blindness, 177–178

ColorMatrixColorFilter class, 314–315

color (qualifier), 76

colors, 103, 171–178

cultural meanings, 175–176

filters, 313–325

selection of, 174–178

complex text, spans for, 297–299

components, Android, 20–23

app bar, 21–22

FAB, 23

navigation drawer, 23

notifications, 21

system bars, 20

tabs, 22–23

ComposeShader, 325

CompoundButton, 42

comps, breaking into views, 200–201

computeScroll(), 365

configuration support, 113–114

Contacts app, 14–15

content, View class attribute, 29

content pieces, wireframes, 122–123

context.getResources(), 355

Contrast Analyser, 179

contrast ratio, text, 179

convertView parameter, 59, 61

core principles

bending to user, 19

do one thing well, 14–15

easy but powerful, 17–18

platform consistency, 18–19

visuals, 17

work well with others, 15–16

custom drawables, creation of, 304–305

custom fonts, 181–182, 293–295

custom views

attributes, 409–416

bitmap creation, 338–339

creating initial custom view files, 352–357

creation of, 334–347, 352–385

drawing, 360–365

layout, 337–338

measurement, 336–337, 357–360

saving and restoring state, 340–347

CycleInterpolator class, 239

D

darken, PorterDuff image compositing mode, 320–321

dashGap, ShapeDrawable class attribute, 95

dashWidth, ShapeDrawable class attribute, 95

DatePicker, 42

Daydream feature, 6

DecelerateInterpolator class, 239

defaults, specifying, 81

deferred rendering, 286–287

density, 79, 81–83

design

colors, 171–178

error cases, 184–185

graphical, wireframes and, 168

icons, 184

lighting, 171

methods, 108–110

navigation, 184

procedural steps, 185–189

text. see text

transitions, 184

designers, working with, 192–193

design library, 72

design website, 13

detail pages, wireframes, 123–125

developers, 192

Device Art Generator, 401

device support, 113–114

DialerFilter, 62

DigitalClock, 46

dimensions, 104

display

images, 39–41

text, 34–39

dots per inch (DPI), 31, 81

determining, 407

drawable, TextView class attribute, 36, 76

Drawable class, 304–305, 356–357

DrawableMarginSpan, 296

drawables

custom, 304–305

XML drawables. see XML drawables

draw(Canvas), 304

drawing views, 333, 360–365

draw9patch tool, 195

DST, PorterDuff image compositing mode, 316–317

DST_ATOP, PorterDuff image compositing mode, 320

DST_IN, PorterDuff image compositing mode, 318

DST_OUT, PorterDuff image compositing mode, 318

DST_OVER, PorterDuff image compositing mode, 318–319

Duarte, Matias, 6

Duff, Tom, 315

duplicate, View class attribute, 29

DynamicDrawableSpan, 296

E

EasyEditSpan, 296

EdgeEffect class, 351

EditText, 38, 404

eliminating, overdraw, 286–289

ellipsize, TextView class attribute, 36

endColor, ShapeDrawable class attribute, 94

error cases, design, 184–185

events, listening to, 47–48

exit button, 19

ExpandableListView class, 59

external libraries, 114

extra, extra, extra high dots per inch (XXXHDPI), 32, 81, 198

extra, extra high dots per inch (XXHDPI), 32, 81

ExtractEditText, 46

extra high dots per inch (XHDPI), 32, 81

F

FAB, 23

FastOutLinearInInterpolator class, 239

FastOutSlowInInterpolator class, 240

feature graphic, Google Play, 397–399

feedback, real user, 162–164

filters, colors, 313–325

flat design, 170

flowcharts, 114

focusable, View class attribute, 29

focused state, 17

fontFamily, TextView class attribute, 36

fonts

custom, 181–182, 293–295

Roboto font family, 293

TextView class, 293

ForegroundColorSpan, 296

FragmentBreadCrumbs, 62

fragments, 64

and activities, 130

lifecycle of, 64–65

passing data to, 65–66

problems associated with, 69–70

prototypes, creation of. see prototypes, creation of

tab, 142–155

talking to activity from, 66–69

transactions, 69

FrameLayout class, 52

full screen mode, 404–405

G

Gallery app, 15

Gallery class, 60

garbage collection, controlling, 283–284

GestureDetector class, 350

GestureOverlayView, 62

getBounds(), 304

getCurrVelocity(), 385

getIntrinsicHeight(), 304

getIntrinsicWidth(), 305

getOpacity(), 304

getScaledMinimumFlingVelocity(), 355

getScrollX(), 365

GIFs, 83

Gimp, 168

GLSurfaceView, 46

goals, 110–111

device and configuration support, 113–114

product, 112–113

user, 111–112

user personas, 112

Google Play, 387

application description, 388

application icon, 389–395

change log, 389

feature graphic, 397–399

promoting apps, 400–401

promotional graphic, 399–400

screenshots, 395–397

video (YouTube), 400

Google Plus, 16

gradientRadius, ShapeDrawable class attribute, 95

gradient shader, 325, 328–330

graphical design

styles, 169–170. see also specific styles

tools for, 168–169

wireframes and, 168

graphics

feature graphic, Google Play, 397–399

promotional. see promotional graphics

gravity

LinearLayout class attribute, 52–53

TextView class attribute, 36

GridLayout, 63

GridLayout library, 72

GridView class, 59

H

hardware keyboard type, 80

HDPI (high dots per inch), 32, 81

height, ShapeDrawable class attribute, 95

Hierarchy Viewer, 289–291

eliminating unnecessary views, 292

exporting Photoshop Document, 292–293

missing views, finding, 291–292

high dots per inch (HDPI), 32, 81

high-level flow, 114–116

hint, TextView class attribute, 36

history, Android design, 6

home screen, 7

Honeycomb, 6, 233

full screen mode, 405

HorizontalIconView class, 352–355

HorizontalScrollView class, 63

hot spot, 171

HSB (hue, saturation, and brightness), 172

vs. RGB, 173–174

HTML class

spans, 297–299

hue, 172

I

Ice Cream Sandwich, 6

IconMarginSpan, 296

icons

animations, 246–251

design, 184

raster, animating, 250–251

vector, animating, 246–250

id, View class attribute, 29

IDs, 104–105

Illustrator, 118, 168–169

ImageButton class, 41

image files, 83–84. see also raster images; vector images

images

alternate sizes, generating, 198–199

availability and size, 183

cache, 277–283

display, 39–41

nine-patch, 84–86, 195–198

optimization, 272–283

right sizes for, 273–277

round, shaders for, 325–328

shrinking, 199, 272–273

working with, 310–313

XML drawables. see XML drawables

ImageSpan, 296

ImageSwitcher, 63

ImageView class, 40–41

importantFor, View class attribute, 29

ink, as Material Design component, 10–11

Inkscape, 118

innerRadius, ShapeDrawable class attribute, 94

innerRadiusRatio, ShapeDrawable class attribute, 94

InputMethodManager, dismissing software keyboard, 404

inputType, TextView class attribute, 36

InsetDrawable class, 92

interaction, and Material Design, 11–12

interpolators, 232–233, 236

IntEvaluator class, 235

ItemAnimator class, 300

ItemDecoration class, 300

J

jank

identifications, 264–265

Systrace and, 265–271

Jelly Bean, 6

JPEGs, 83, 272–273

K

kerning, 180

keyboard availability, 80

keyboards, software keyboard (dismissing), 404

KeyboardView, 46

key frames, 240–241

KitKat, 256

L

language, 77

language direction, 77

layer list, XML drawables, 87–88

LayoutParams, RelativeLayout class, 56–57

layout (qualifier), 76

layouts, 28

views, 333, 337–338

LayoutTransition class, 252

LDPI (low dots per inch), 32, 81

leading, 180

LeadingMarginSpan.Standard, 296

leanback library, 73

left, ShapeDrawable class attribute, 95

level list, XML drawables, 91

LevelListDrawable class, 91

lifecycle, of fragments, 64–65

lighten, PorterDuff image compositing mode, 320

lighting, 171

LightingColorFilter class, 313

LinearGradient, 325

LinearInterpolator class, 240

LinearLayout class, 52–55

LinearLayoutManager class, 299

LinearOutSlowInInterpolator class, 240

lines, TextView class attribute, 37

line spacing, 180

lineSpacing, TextView class attribute, 37

listeners, 235

ListView class, 58–59, 284, 299

LocaleSpan, 296

Lollipop, 7

long press gesture, 25

low dots per inch (LDPI), 32, 81

LruCache class, 277

LRU (least-recently-used) cache, 277

LTR (left-to-right) layout, 32–34

M

MaskFilterSpan, 296

match_parent (layout parameter), 31, 55

Material Design, 8–13, 170

and app bar, 22

colors for, 173–174

interaction and animation, 11–12

metrics and alignment, 13

mistakes made by designers/developers, 24–25

overview, 8–11

typography, 12–13

maxLines, TextView class attribute, 37

MDPI (medium dots per inch), 32, 81

measureHeight(int), 358

measurement, views, 332–333, 336–337, 357–360

MeasureSpec, 333

measureWidth(int), 358, 359

mEdgeEffectLeft, 356, 370

mEdgeEffectRight, 356, 370

MediaController, 63

MediaRouteButton, 46

MediaRouter library, 73

medium dots per inch (MDPI), 32, 81

menu key, 24–25

menu (qualifier), 76

menus, 105

methods, design

common, 108

User-Centered Design, 108–110

MetricAffectingSpan, 296

Metro (design language), 170

Microsoft, 170

minHeight, View class attribute, 29

Minimalism, 170

minLines, TextView class attribute, 37

minWidth, View class attribute, 29

mipmap (qualifier), 76

mistakes, made by designers/developers

long press gesture, 25

menu key, 24–25

notification icons, 25

styles from other platforms, 25

mobile country code, 77

mobile network code, 77

modes, PorterDuff image compositing, 316–325

add, 322

clear, 316

darken, 320–321

DST, 316–317

DST_ATOP, 320

DST_IN, 318

DST_OUT, 318

DST_OVER, 318–319

lighten, 320

multiply, 322–323

overlay, 323

screen, 323

SRC, 316–317

SRC_ATOP, 320

SRC_IN, 318

SRC_OUT, 318

SRC_OVER, 318–319

XOR, 323–325

MotionEvent.ACTION_CANCEL, 371

MotionEvent.ACTION_POINTER_UP, 371

MotionEvent.ACTION_UP, 370–371

MotionEvent class, 350–351, 369

MultiAutoCompleteTextView, 44

multiple devices, support for, 23–24, 125–126

multiply, PorterDuff image compositing mode, 322–323

N

naming conventions, wireframes, 127

navigation

design, 184

wireframes, 119–122

navigation drawer, 23, 134–136

navigation key availability, 80

network connection, 408

Nexus 5, 268, 273

night mode, 79

nine-patch images, 84–86, 195–198

normal state, 17

notification icons, 25

notifications, 21

NumberPicker, 44

O

ObjectAnimator class, 234

Omnigraffle, 118

onAbsorb(int), 365

onActivityCreated(Bundle), 64

onAttach(Activity), 64

onBoundsChange(Rect), 305

OnClickListener, 48

onCreate(Bundle), 64

onCreateView(LayoutInflater, ViewGroup, Bundle), 64

onDestroy(), 65

onDestroyView(), 65

onDetach(), 65

OnDragListener, 48

onDraw(Canvas), 355

OnFocusChangeListener, 48

OnGenericMotionListener, 48

OnHoverListener, 48

onKeyDown(int, KeyEvent), 351

OnKeyListener, 48

onLevelChange(int), 305

OnLongClickListener, 48

onMeasure(int, int), 360

onOverScrolled(int, int, boolean, boolean), 366

onPause(), 65

onResume(), 64

onScrollChanged(x, 0, oldX, 0), 365

onStart(), 64

onStateChange(int[]), 305

onStop(), 65

onTouchEvent(MotionEvent), 369, 371

OnTouchListener, 48

onViewStateRestored(Bundle), 64

optical bounds, 197–198

optimization, images, 272–283

orientation, 79

orientation, LinearLayout class, 54, 55

overdraw, eliminating, 286–289

overlay, PorterDuff image compositing mode, 323

overScrollBy, 366, 370

OverScroller class, 351

OvershootInterpolator class, 240

P

padding, View class attribute, 30

PagerTabStrip, 63

PagerTitleStrip, 63

Paint class, 305

Palette library, 73

paper, as Material Design component, 8–9

Paper Camera app, 400

PathInterpolator class, 240

patterns, ViewHolder class, 284–286

performance, techniques to improve

eliminating overdraw, 286–289

garbage collection, controlling, 283–284

view holder pattern, 284–286

Permission Informant app, 175

photo filters, 17

Photoshop, 168, 177–178

Photoshop documents (PSD), exporting, 292–293

Pixelmator, 168

platform consistency, core principles, 18–19

platform version, 80

PNGs, 83, 273

compression, 84

Porter, Thomas, 315

PorterDuff image compositing, 315–316

modes, 316–325. see also modes, PorterDuff image compositing

postInvalidateOnAnimation(), 385

pressed state, 17

primary non-touch navigation method, 80

product goals, 112–113

ProgressBar, 46

Project Butter, 6

promoting apps, Google Play, 400–401

promotional graphics

Google Play, 399–400

property animations, 233–235

control, 235–241. see also specific controls

prototypes, creation of, 131–160

navigation drawer, 134–136

tabs, 132–134

tool details, 155–160

tool representation, 137–142

prototypes, evaluation of, 160

dynamic goal, 162

open-ended exploration, 161

real user feedback, 162–164

specific goal, 161–162

working with users, 161

Q

QuickContactBadge, 46

QuoteSpan, 296

R

RadialGradient, 325

RadioButton, 44

RadioGroup, 44

radius, ShapeDrawable class attribute, 94

raster icons, animating, 250–251

raster images, 83

RasterizerSpan, 296

RatingBar, 44

raw (qualifier), 76

R class, 30–31

resource qualifiers, 80–81

R.drawable.header, 80, 81

RecyclerView.Adapter class, 299–300

RecyclerView class, 299–300

RecyclerView library, 73

region, 77

RelativeLayout class, 55–56

RelativeSizeSpan, 296

rendering, deferred, 286–287

ReplacementSpan, 296

resource qualifiers, 76–81

list of, 77–80

RGB (red, green, and blue)

vs. HSB, 173–174

right, ShapeDrawable class attribute, 95

RippleDrawable class, 100–101

Roboto, 12, 13

Roboto font family, 293

rounded corners, specifying, 95

round images, shaders for, 325–328

RSSurfaceView, 47

RSTextureView, 47

RTL (right-to-left) layout, 32–34

S

Samsung, 34

saturation, 172–173

ScaleDrawable class, 93

scaleType attribute, values for, 40–41

ScaleXSpan, 296

scene transitions, 252–255

screen, PorterDuff image compositing mode, 323

screen aspect, 79

screens, keeping on, 405

screenshots, Google Play, 395–397

screen size, 78

determining, 406–407

Scroller class, 351

ScrollerCompat class, 351

ScrollView, 63

SearchView, 63

SeekBar, 44

setAlpha(int), 304

setColorFilter(ColorFilter), 304

setDrawables(ListDrawable), 356–357

setWillNotDraw(false), 355

setWillNotDraw method, 334

shaders, 325–330

gradient, 325, 328–330

round images, 325–328

shadowColor, TextView class attribute, 37

shadowDx, TextView class attribute, 37

shadowDy, TextView class attribute, 37

shadowRadius, TextView class attribute, 37

shadows

in Material Design, 9–10

text, 180–181

shape, ShapeDrawable class attribute, 94

ShapeDrawable class, 93–96

sharing, 15–16

Show GPU Overdraw option, 287, 288

shrinking images, 199, 272–273

simple text drawable, 306–308

sizes, text, 180

Sketch tool, 118–119

skeuomorphic design, 11

skeuomorphism, 169

slicing, 193

easy, 193–194

generating alternate sizes, 198–199

nine-patch images, 195–198

SlidingDrawer, 63

smallest width, 78

software keyboard, dismissing, 404

Space, 47

spacing, text, 180

spans

for complex text, 297–299

existing, 295–297

Spinner, 44

Spinner class, 60

SRC, PorterDuff image compositing mode, 316–317

SRC_ATOP, PorterDuff image compositing mode, 320

SRC_IN, PorterDuff image compositing mode, 318

SRC_OUT, PorterDuff image compositing mode, 318

SRC_OVER, PorterDuff image compositing mode, 318–319

StackView, 63

standard icons, 184

startColor, ShapeDrawable class attribute, 95

state list, XML drawables, 88–91

StateListDrawable class, 88

StrikethroughSpan, 296

strings, 102–103

styles

text, 180

themes and, 199–200

StyleSpan, 296

SubscriptSpan, 296

SuggestionSpan, 297

SuperscriptSpan, 297

supporting multiple devices, 23–24, 125–126

support library

annotations library, 73–74

AppCompat library, 70–71

CardView library, 71–72

design library, 72

GridLayout library, 72

leanback library, 73

MediaRouter library, 73

Palette library, 73

RecyclerView library, 73

SurfaceView, 47

SweepGradient, 325

Switch, 44

system bars, 20

Systrace tool, 265–271

T

TabHost, 63

TableLayout, 63

TableRow, 63

tabs, 22–23, 132–134

TabStopSpan.Standard, 297

TabWidget, 63

testing, across device types, 228–229

text

better drawable, 308–310

capitalization, 180

complex, spans for, 297–299

contrast ratio, 179

design, 178–182

display, 34–39

fonts, 181–182

shadows, 180–181

simple drawable, 306–308

sizes, 34, 180

spacing, 180

styles, 180

varying lengths, 183

text, TextView class attribute, 37

TextAppearanceSpan, 297

TextClock, 47

textColor, TextView class attribute, 37

textIs, TextView class attribute, 37

textSize, TextView class attribute, 37

textStyle, TextView class attribute, 37

TextSwitcher, 63

TextureView, 47

TextView class, 35–38

attributes, 36–38

existing spans, 295–297

fonts, 293

HTML, 297–299

thickness, ShapeDrawable class attribute, 94

thicknessRatio, ShapeDrawable class attribute, 94

3x Rule, 183–184

TimeInterpolator interface, 236–238

TimePicker, 45

ToggleButton, 45

Toolbar class, 62

top, ShapeDrawable class attribute, 95

topLeftRadius, ShapeDrawable class attribute, 94

topRightRadius, ShapeDrawable class attribute, 94

touch input

handling, 369–385

preparation for, 365–369

and views, 350–351

touchscreen type, 79

TransitionDrawable class, 91–92

transitions, 252

activity, 255–259

circular reveal, 259–262

design, 184

scene, 252–255

transparency, 183–184

type, ShapeDrawable class attribute, 95

type evaluators, 235–238

typeface, TextView class attribute, 37

TypefaceSpan, 297

typography, 12–13

U

UCD (User-Centered Design), 108–110

UI mode, 79

UI threads, 408–409

UnderlineSpan, 297

up indicator, 125

URLSpan, 297

useLevel, ShapeDrawable class attribute, 94

User-Centered Design (UCD), 108–110

user goals, 111–112

user personas, 112

V

ValueAnimator class, 233–234, 235

values (qualifier), 76

VectorDrawable class, 96

attributes for, 97–98

vector icons, animating, 246–250

vector images, 84

VideoView, 47

video (YouTube), 400

view animations, 232–233

ViewAnimator, 63

View class, attributes. see attributes, View class

ViewFlipper, 63

ViewGroup class, 52, 360

ViewHolder class, patterns, 284–286

ViewPager class, 61

ViewPropertyAnimator class, 241–242

views, 28

breaking comps into, 200–201

custom. see custom views

dimensions, 31–34

drawing, 333

for gathering user input, 42–45

general concepts behind, 332

IDs, 30

layout, 333

measurement, 332–333

missing, finding, Hierarchy Viewer and, 291–292

save and restore state, 334

touch input and, 350–351

unnecessary, eliminating, 292

ViewSwitcher, 63

visibility, View class attribute, 30

visuals, core principles, 17

W

WCAG (Web Content Accessibility Guidelines), 179

website, Android design, 13

WebView, 47

weight, LinearLayout class attribute, 53

width, ShapeDrawable class attribute, 95

wireframes, 117–119

content pieces, 122–123

detail pages, 123–125

and graphical design, 168

naming conventions, 127

navigation, 119–122

supporting multiple devices, 125–126

Wireframe Sketcher, 119

woodworking app, 178

development of, 201–228

main screen, 201–211

tool details activity, 224–228

tool list, 211–224

wrap_content (layout parameter), 31

X

XHDPI (extra high dots per inch), 32, 81

XML drawables, 86–87

AnimatedVectorDrawable class, 98–100

ClipDrawable class, 92–93

InsetDrawable class, 92

layer list, 87–88

level list, 91

RippleDrawable class, 100–101

ScaleDrawable class, 93

ShapeDrawable class, 93–96

state list, 88–91

tiles, 194

TransitionDrawable class, 91–92

VectorDrawable class, 96–98

xml (qualifier), 76

XOR, PorterDuff image compositing mode, 323–325

XXHDPI (extra, extra high dots per inch), 32, 81

XXXHDPI (extra, extra, extra high dots per inch), 32, 81, 198

Z

ZoomButton, 47

ZoomControls, 63