Amazing Android How We Built Square Friday, May 14, 2010 Friday, - - PowerPoint PPT Presentation

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Amazing Android How We Built Square Friday, May 14, 2010 Friday, - - PowerPoint PPT Presentation

Feb 14, 2024 477 likes •819 views

Amazing Android How We Built Square Friday, May 14, 2010 Friday, May 14, 2010 Friday, May 14, 2010 Friday, May 14, 2010 Friday, May 14, 2010 Friday, May 14, 2010 Friday, May 14, 2010 Friday, May 14, 2010 Friday, May 14, 2010 Friday, May

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Amazing Android

How We Built Square

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SLIDE 2

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SLIDE 3

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SLIDE 4

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SLIDE 5

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SLIDE 6

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SLIDE 8

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SLIDE 9

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SLIDE 10

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How We Did It

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Paper Textures

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enum Noise { GRAY(0x64676E), PAPER(0xDEDFE1), BACKGROUND(0xBCBEC2), STANDARD_BUTTON(0xcccccc), TITLE_BAR_EMPHASIZED(0x505356); private final Bitmap bitmap; Noise(int startingColor) { bitmap = Factory.newBitmap( Factory.generatePalette(startingColor)); } Bitmap getBitmap() { return bitmap; }

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/** Creates a new bitmap filled with noise. */ private static Bitmap newBitmap(int[] palette) { int[] noise = new int[SIZE]; byte[] paletteIndices = PALETTE_INDICES; for (int i = 0; i < SIZE; i++) noise[i] = palette[paletteIndices[i]]; return Bitmap.createBitmap(noise, LENGTH, LENGTH, ARGB_8888); }

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class PaperTexture extends Drawable { private Paint bitmapPaint = new Paint(); private ShapeDrawable.ShaderFactory highlight; PaperTexture(PaperColor paperColor, ShapeDrawable.ShaderFactory highlight) { bitmapPaint.setShader(new BitmapShader( paperColor.getNoise().getBitmap(), REPEAT, REPEAT)); this.highlight = highlight; } }

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public class TitleBar extends RelativeLayout { public TitleBar(Context c, AttributeSet attrs) { setBackgroundDrawable(PaperTextures.color( PaperColor.TITLE_BAR) .highlightPercentage(90).drawable()); } }

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Building Blocks

  • Bitmap
  • Paint
  • Drawable
  • Shader

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Hud

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public class Hud { public static void showImageToast( Context context, int imageResourceId) { ImageView hud = new ImageView(context); hud.setBackgroundResource(R.drawable.hud); hud.setImageResource(imageResourceId); Toast toast = new Toast(context); toast.setView(hud); toast.setDuration(Toast.LENGTH_SHORT); toast.setGravity(Gravity.CENTER, 0, 0); toast.show(); } }

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Numeric Keyboard

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Show Code

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IconFlipper

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IconFlipper flipper = (IconFlipper) findViewById( R.id.on_off_icon); IconFlipper.Icon onIcon = flipper.newIcon( R.drawable.on); IconFlipper.Icon offIcon = flipper.newIcon( R.drawable.off);

  • nIcon.show();

...

  • ffIcon.show(Transition.FLIP);

Using IconFlipper

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Rounded Corners Picture Frame

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Bitmap bitmap = Bitmaps.decode(fromFile(file)) .scale(imageSize) .square() .roundCorners(radius, borderWidth, borderColor) .create(resources);

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PercentageLayout

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PaymentBook

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SignatureView

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JSON

  • PaymentService

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QueueFile

  • YAFFS filesystem - Atomic segment writes

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