Slide 1
Slide 1 text
Bitmapා͘ͳ͍
Wasabeef
Slide 2
Slide 2 text
About Me
wasabeef
CyberAgent, Inc.
Slide 3
Slide 3 text
Ͳ͏ߟ͑ͯBitmapා͍Ͱ͢
Slide 4
Slide 4 text
OutOfMemoryError…
Slide 5
Slide 5 text
About Bitmap
Slide 6
Slide 6 text
Bitmap
• ը૾Λѻ͏جຊతͳAPI
• BitmapFactoryͰΦϒδΣΫτੜ͢Δ
• OutOfMemoryΛى͜͢ݪҼʹͳΓ͍͢
Slide 7
Slide 7 text
Supported Image Formats
Format Encoder Decoder Details File Type
JPEG ! ! Base+Progressive .jpg
GIF ! .gif
PNG ! ! .png
BMP ! .bmp
WebP
!#
4.0+
!#
4.0+
.webp
Slide 8
Slide 8 text
About BitmapFactory.Options
Slide 9
Slide 9 text
inJustDecodeBounds
• Bitmapͷϝλใ͚ͩऔಘ
• ͋Β͔͡Ίը૾αΠζ͚ͩऔಘ͢Δ߹ͳͲ
Slide 10
Slide 10 text
inSampleSize
• σϑΥϧτ1
• 2ʹઃఆ͢Δͱ1/2αΠζ
• 4ʹઃఆ͢Δͱ1/4αΠζ
• BitmapʹFilter͔͚Δ࣌ʹͱͯ༗ޮ
Slide 11
Slide 11 text
inPreferredConfig
• BitmapΛಡΈࠐΉFormatΛࢦఆ͢Δ
• σϑΥϧτ Bitmap.Config.ARGB_8888
Slide 12
Slide 12 text
About Bitmap.Config
Slide 13
Slide 13 text
ARGB_8888
• 32bit
• Alpha, Red, Green, Blue ֤8bit
• Default
Slide 14
Slide 14 text
ARGB_4444
• 16bit
• Alpha, Red, Green, Blue ֤4bit
• Deprecated in API 13
Slide 15
Slide 15 text
RGB_565
• 16bit
• Alpha͕ͳ͍ը૾ʹ༗ޮ
• ߹ʹΑͬͯARGB_8888ͷۙ͘
Slide 16
Slide 16 text
ALPHA_8
• 8bit
• AlphaͷΈͷ߹ʹ༗ޮ
Slide 17
Slide 17 text
Open Source
Slide 18
Slide 18 text
Open Source
• Universal Image Loader
• Picasso
• Glide
• Fresco
• Volley
Slide 19
Slide 19 text
Picasso by Square
Slide 20
Slide 20 text
Picasso
• Image Library
• Transformation
• Cache
• Save the world
Slide 21
Slide 21 text
Picasso
Picasso.with(this)
.load(“http://i.imgur.com/4rBHm4Q.jpg”)
.transform(new CircleTransform())
.into(imageView);
Slide 22
Slide 22 text
Picasso
.fit()
Slide 23
Slide 23 text
Picasso
.centerCrop()
Slide 24
Slide 24 text
Picasso
.resize(800,800).centerInside()
Slide 25
Slide 25 text
Glide by
Bump (sjudd)
Slide 26
Slide 26 text
Glide
• Picasso like
• Video, Gif support
• Sampling support
• BitmapPool
• Thumbnail change the world
Slide 27
Slide 27 text
Glide
Glide.with(this)
.load(“http://i.imgur.com/4rBHm4Q.jpg”)
.transform(new CircleTransform())
.into(imageView);
#
Slide 28
Slide 28 text
.fitCenter()
Glide
Slide 29
Slide 29 text
.centerCrop()
Glide
Slide 30
Slide 30 text
.override(800, 800)
Glide
Slide 31
Slide 31 text
Picasso and Glide
Transform
Slide 32
Slide 32 text
Transform
ը૾ΛಡΈࠐΜͰImageViewʹ
දࣔ͢Δલʹը૾Λมܗͤ͞Δ
Slide 33
Slide 33 text
RoundedCorners
Slide 34
Slide 34 text
CropCircle
Slide 35
Slide 35 text
BitmapShader
Slide 36
Slide 36 text
BitmapShader
public static Bitmap shader(Bitmap src) {
int width = src.getWidth();
int height = src.getHeight();
#
bitmap = Bitmap.createBitmap(width, height, config);
#
Canvas canvas = new Canvas(bitmap);
Paint paint = new Paint();
paint.setAntiAlias(true);
BitmapShader shader = new BitmapShader(
src, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);
#
paint.setShader(shader);
RectF rectF =
new RectF(margin, margin, width - margin, height - margin);
canvas.drawRoundRect(recfF, radius, radius, paint);
#
return bitmap;
}
Slide 37
Slide 37 text
Blur
Slide 38
Slide 38 text
RenderScript
Slide 39
Slide 39 text
RenderScript
ScriptIntrinsicBlur
public static Bitmap blur(Bitmap src) {
int width = src.getWidth();
int height = src.getHeight();
#
bitmap = Bitmap.createBitmap(width, height, config);
RenderScript rs = RenderScript.create(mContext);
Allocation alloc = Allocation.createFromBitmap(rs, src);
ScriptIntrinsicBlur blur =
ScriptIntrinsicBlur.create(rs, alloc.getElement());
blur.setInput(alloc);
blur.setRadius(mRadius);
blur.forEach(alloc);
alloc.copyTo(bitmap);
source.recycle();
#
return bitmap;
}
Slide 40
Slide 40 text
ColorFilter
Slide 41
Slide 41 text
ColorFilter
Slide 42
Slide 42 text
ColorFilter
public static Bitmap color(Bitmap src, int color) {
int width = src.getWidth();
int height = src.getHeight();
#
bitmap = Bitmap.createBitmap(width, height, config);
Canvas canvas = new Canvas(bitmap);
Paint paint = new Paint();
paint.setAntiAlias(true);
PorterDuffColorFilter filter =
new PorterDuffColorFilter(color, PorterDuff.Mode.SRC_ATOP);
paint.setColorFilter(filter);
canvas.drawBitmap(src, 0, 0, paint);
#
return bitmap;
}
Slide 43
Slide 43 text
Open Source
Slide 44
Slide 44 text
Transform
• picasso-transformations
• glide-transformations
wasabeef
Slide 45
Slide 45 text
GPUImage for Android
CyberAgent, Inc.
Slide 46
Slide 46 text
GPUImage for Android
• iOSͷGPUImageΛݩʹAndroidʹҠ২
• ImageViewʹରͯ͠FilterΛ͔͚ΕΔ
• Filterͷछྨ70ݸ
• PhotoshopͷACVʹରԠ
• API 8 (2.2+)
Slide 47
Slide 47 text
GPUImage for Android
@Override
public void onCreate(final Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity);
#
Uri imageUri = Uri.parse(“http://i.imgur.com/4rBHm4Q.jpg”);
mGPUImage = new GPUImage(this);
mGPUImage.setImage(imageUri);
mGPUImage.setFilter(new GPUImageToonFilter());
#
mGPUImage.saveToPictures(mGPUImage, “sample.jpg”, null);
}
Slide 48
Slide 48 text
Fresco by Facebook
Slide 49
Slide 49 text
Fresco
• streaming of progressive JPEGs
• Gif, WebP support
• Loading customization
Slide 50
Slide 50 text
Fresco
Slide 51
Slide 51 text
OutOfMemoryError
Slide 52
Slide 52 text
࠷ޙͷखஈ
Slide 53
Slide 53 text
android:largeHeap=“true"
Slide 54
Slide 54 text
largeHeap == true?
• Google+
• Amazon Kindle
• Facebook
• Hulu
• Tumblr
• Youtube
• Ameba Ownd
Slide 55
Slide 55 text
Wasabeef
Slide 56
Slide 56 text
Thanks.