Rinsing The Brush: Picasso 3.0 (Chicago Roboto 2018)

Picasso is a powerful image downloading and caching library for Android but since its launch in 2013, other libraries have improved or entered the scene and new requirements have come up.

In this talk, we’ll:

* Dig into the internals of Picasso works
* Compare and contrast to other image libraries
* Discuss latest improvements as we push to 3.0
* …and more!

You’ll learn to efficiently work with different image formats across millions of devices!

Presented with John Rodriguez.

Video: soon!

Transcript

1. Rinsing the Brush: Picasso 3.0 John Rodriguez Jake Wharton
7. 3 years later
8. 3.x Goals
9. • Android P 3.x Goals
10. • Android P • OkHttp 2.x => 3.x 3.x Goals
11. • Android P • OkHttp 2.x => 3.x
 • Okio integration 3.x Goals
12. • Android P • OkHttp 2.x => 3.x
 • Okio integration
 • Improvements 3.x Goals
13. • Android P • OkHttp 2.x => 3.x
 • Okio integration
 • Improvements 3.x Goals
16. Bitmap decodeStreamPreP(Request r, BufferedSource bs) { BitmapFactory.Options options = createBitmapOptions(request); if (requiresInSampleSize(options)) { InputStream stream = new SourceBufferingInputStream(bs); BitmapFactory.decodeStream(stream, null, options); calculateInSampleSize(r.targetWidth, r.targetHeight, options, r); } return BitmapFactory.decodeStream(bs.inputStream(), null, options); }
17. Bitmap decodeStreamPreP(Request r, BufferedSource bs) { BitmapFactory.Options options = createBitmapOptions(request); if (requiresInSampleSize(options)) { InputStream stream = new SourceBufferingInputStream(bs); BitmapFactory.decodeStream(stream, null, options); calculateInSampleSize(r.targetWidth, r.targetHeight, options, r); } return BitmapFactory.decodeStream(bs.inputStream(), null, options); }
19. Bitmap decodeStreamP(Request r, BufferedSource bs) { ImageDecoder.Source imageSource = ImageDecoder.createSource(ByteBuffer.wrap(bs.readByteArray())); return ImageDecoder.decodeBitmap( imageSource, new OnHeaderDecodedListener() { void onHeaderDecoded(ImageDecoder d, ImageInfo info, Source src) { if (r.hasSize()) { d.setTargetSize(r.targetWidth, r.targetHeight); } } }); }
20. Bitmap decodeStreamP(Request r, BufferedSource bs) { ImageDecoder.Source imageSource = ImageDecoder.createSource(ByteBuffer.wrap(bs.readByteArray())); return ImageDecoder.decodeBitmap( imageSource, new OnHeaderDecodedListener() { void onHeaderDecoded(ImageDecoder d, ImageInfo info, Source src) { if (r.hasSize()) { d.setTargetSize(r.targetWidth, r.targetHeight); } } }); }
21. Bitmap decodeStreamP(Request r, BufferedSource bs) { ImageDecoder.Source imageSource = ImageDecoder.createSource(ByteBuffer.wrap(bs.readByteArray())); return ImageDecoder.decodeBitmap( imageSource, new OnHeaderDecodedListener() { void onHeaderDecoded(ImageDecoder d, ImageInfo info, Source src) { if (r.hasSize()) { d.setTargetSize(r.targetWidth, r.targetHeight); } } }); }
22. • Android P • OkHttp 2.x => 3.x
 • Okio integration
 • Improvements 3.x Goals
23. Picasso
24. Picasso ResourceRequestHandler AssetsRequestHandler NetworkRequestHandler FileRequestHandler ...
25. Downloader Picasso ResourceRequestHandler AssetsRequestHandler NetworkRequestHandler FileRequestHandler ...
26. OkHttp 2.x HttpURLConnection Downloader Picasso ResourceRequestHandler AssetsRequestHandler NetworkRequestHandler FileRequestHandler ...
27. OkHttp 2.x HttpURLConnection OkHttp 3.x Downloader Picasso ResourceRequestHandler AssetsRequestHandler NetworkRequestHandler FileRequestHandler ...
28. OkHttp 3.x HttpURLConnection OkHttp 2.x Downloader Picasso ResourceRequestHandler AssetsRequestHandler NetworkRequestHandler FileRequestHandler ...
29. OkHttp 3.x Picasso ResourceRequestHandler AssetsRequestHandler NetworkRequestHandler FileRequestHandler ...
30. Picasso ResourceRequestHandler AssetsRequestHandler NetworkRequestHandler FileRequestHandler ... Call.Factory (OkHttp 3.x)
31. Picasso OkHttp
32. Okio Picasso OkHttp
33. Picasso OkHttp Retrofit Okio
34. Picasso OkHttp Okio Retrofit Moshi
35. Picasso OkHttp Okio Retrofit Moshi
36. Picasso OkHttp Okio Retrofit Moshi Wire
37. Picasso OkHttp Okio Retrofit Moshi Wire
38. • Android P • OkHttp 2.x => 3.x
 • Okio integration
 • Improvements 3.x Goals
39. java.io.IOException: Cannot reset at com.squareup.picasso.MarkableInputStream.reset(MarkableInputStream.java:99) at com.squareup.picasso.BitmapHunter.decodeStream(BitmapHunter.java:140) at com.squareup.picasso.BitmapHunter.hunt(BitmapHunter.java:217) at com.squareup.picasso.BitmapHunter.run(BitmapHunter.java:159) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:457) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636) at java.lang.Thread.run(Thread.java:764) at com.squareup.picasso.Utils$PicassoThread.run(Utils.java:411)
40. nightmare_shrek.png
41. MAGIC nightmare_shrek.png
42. METADATA METADATA METADATA MAGIC nightmare_shrek.png
43. PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA METADATA METADATA METADATA MAGIC nightmare_shrek.png
44. PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA METADATA METADATA METADATA MAGIC
45. PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA METADATA METADATA METADATA MAGIC
46. PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA METADATA METADATA METADATA MAGIC
47. PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA METADATA METADATA METADATA MAGIC
48. PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA METADATA METADATA METADATA MAGIC
49. PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA METADATA METADATA METADATA MAGIC
50. InputStream PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA METADATA METADATA METADATA MAGIC
51. InputStream BitmapFactory inJustDecodeBounds=true MAGIC METADATA
52. InputStream BitmapFactory inJustDecodeBounds=true MAGIC METADATA
53. InputStream BitmapFactory inJustDecodeBounds=true MAGIC METADATA JPEG?
54. InputStream BitmapFactory inJustDecodeBounds=true MAGIC METADATA METADAT JPEG?
55. InputStream BitmapFactory inJustDecodeBounds=true MAGIC METADATA METADAT JPEG?
56. InputStream BitmapFactory inJustDecodeBounds=true MAGIC METADATA METADAT
57. InputStream BitmapFactory inJustDecodeBounds=true MAGIC METADATA METADAT
58. InputStream BitmapFactory inJustDecodeBounds=true MAGIC METADATA METADAT
59. InputStream BitmapFactory inJustDecodeBounds=true MAGIC METADATA
60. BitmapFactory inJustDecodeBounds=true MAGIC METADATA METADATA METADATA PIXEL DATA
61. BitmapFactory inJustDecodeBounds=true MAGIC METADATA METADATA METADATA PIXEL DATA JPEG?
62. BitmapFactory inJustDecodeBounds=true MAGIC METADATA METADATA METADATA PIXEL DATA JPEG?
63. BitmapFactory inJustDecodeBounds=true MAGIC METADATA METADATA METADATA PIXEL DATA JPEG?
64. BitmapFactory inJustDecodeBounds=true MAGIC METADATA METADATA METADATA PIXEL DATA
65. BitmapFactory inJustDecodeBounds=true MAGIC METADATA METADATA METADATA PIXEL DATA PNG?
66. BitmapFactory inJustDecodeBounds=true MAGIC METADATA METADATA METADATA PIXEL DATA PNG?
67. BitmapFactory inJustDecodeBounds=true MAGIC METADATA METADATA METADATA PIXEL DATA PNG!
68. BitmapFactory inJustDecodeBounds=true MAGIC METADATA METADATA METADATA PIXEL DATA PNG
69. BitmapFactory inJustDecodeBounds=true MAGIC METADATA METADATA METADATA PIXEL DATA PNG size?
70. BitmapFactory inJustDecodeBounds=true MAGIC METADATA METADATA METADATA PIXEL DATA PNG size?
71. BitmapFactory inJustDecodeBounds=true MAGIC METADATA METADATA METADATA PIXEL DATA PNG 1920x1080!
72. BitmapFactory inJustDecodeBounds=true MAGIC METADATA 2METADATA2 1METADATA1 PIXEL DATA PNG 1920x1080
73. BitmapFactory inJustDecodeBounds=true MAGIC METADATA 2METADATA2 1METADATA1 PIXEL DATA 1920x1080
74. InputStream BitmapFactory BitmapFactory inJustDecodeBounds=true MAGIC METADATA 2METADATA2 1METADATA1 PIXEL DATA 1920x1080 PIXEL DAT
75. InputStream BitmapFactory inJustDecodeBounds=true BitmapFactory PIXEL DATA MAGIC METADATA 2METADATA2 1METADATA1 PIXEL DATA 1920x1080
76. InputStream BitmapFactory inJustDecodeBounds=true BitmapFactory PIXEL DATA MAGIC METADATA 2METADATA2 1METADATA1 PIXEL DATA 1920x1080
77. InputStream BitmapFactory inJustDecodeBounds=true BitmapFactory PIXEL DATA MAGIC METADATA 2METADATA2 1METADATA1 PIXEL DATA 1920x1080
78. InputStream BitmapFactory inJustDecodeBounds=true MAGIC METADATA
79. BitmapFactory inJustDecodeBounds=true MAGIC METADATA METADATA METADATA PIXEL DATA MarkableInputStream
80. BitmapFactory inJustDecodeBounds=true MAGIC METADATA METADATA METADATA PIXEL DATA MarkableInputStream MAGIC METADATA METADATA METADATA PIXEL DATA
81. BitmapFactory inJustDecodeBounds=true MAGIC METADATA METADATA METADATA PIXEL DATA MarkableInputStream MAGIC METADATA METADATA METADATA PIXEL DATA 1920x1080
82. BitmapFactory inJustDecodeBounds=true MAGIC METADATA METADATA METADATA PIXEL DATA MarkableInputStream MAGIC METADATA METADATA METADATA PIXEL DATA 1920x1080
83. BitmapFactory inJustDecodeBounds=true MAGIC METADATA METADATA METADATA PIXEL DATA MarkableInputStream MAGIC METADATA METADATA METADATA PIXEL DATA 1920x1080 BitmapFactory MAGIC METADATA METADATA METADATA PIXEL DATA
84. BitmapFactory inJustDecodeBounds=true MAGIC METADATA METADATA METADATA PIXEL DATA MarkableInputStream MAGIC METADATA METADATA METADATA PIXEL DATA 1920x1080 MAGIC METADATA METADATA METADATA PIXEL DATA BitmapFactory
85. BitmapFactory inJustDecodeBounds=true MarkableInputStream MAGIC METADATA METADATA METADATA PIXEL DATA 1920x1080 BitmapFactory
86. PIXEL DATA PIXEL DATA PIXEL DATA BitmapFactory inJustDecodeBounds=true MarkableInputStream MAGIC METADATA METADATA METADATA PIXEL DATA 1920x1080 BitmapFactory
87. PIXEL DATA PIXEL DATA PIXEL DATA BitmapFactory inJustDecodeBounds=true MarkableInputStream MAGIC METADATA METADATA METADATA PIXEL DATA 1920x1080 BitmapFactory PIXEL DATA PIXEL DATA PIXEL DATA
88. MAGIC METADATA METADATA METADATA PIXEL DATA MarkableInputStream MAGIC METADATA METADATA METADATA PIXEL DATA
89. BitmapFactory inJustDecodeBounds=true MAGIC METADATA METADATA METADATA PIXEL DATA MarkableInputStream MAGIC METADATA METADATA METADATA PIXEL DATA
90. BitmapFactory inJustDecodeBounds=true MAGIC METADATA METADATA METADATA PIXEL DATA MarkableInputStream MAGIC METADATA METADATA METADATA PIXEL DATA
91. MarkableInputStream BitmapFactory inJustDecodeBounds=true
92. PIXEL DATA PIXEL DATA PIXEL DATA MarkableInputStream BitmapFactory inJustDecodeBounds=true
93. PIXEL DATA PIXEL DATA PIXEL DATA MarkableInputStream BitmapFactory inJustDecodeBounds=true PIXEL DATA PIXEL DATA PIXEL DATA
94. MarkableInputStream BitmapFactory inJustDecodeBounds=true
95. MarkableInputStream BitmapFactory inJustDecodeBounds=true PIXEL DATA PIXEL DATA PIXEL DATA
96. MarkableInputStream BitmapFactory inJustDecodeBounds=true PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA
97. MarkableInputStream BitmapFactory inJustDecodeBounds=true
98. MarkableInputStream BitmapFactory inJustDecodeBounds=true PIXEL DATA PIXEL DATA
99. MarkableInputStream BitmapFactory inJustDecodeBounds=true PIXEL DATA PIXEL DATA PIXEL DATA PIXEL DATA
100. MarkableInputStream BitmapFactory inJustDecodeBounds=true PIXEL DATA PIXEL DATA
101. MarkableInputStream BitmapFactory inJustDecodeBounds=true ??? PIXEL DATA PIXEL DATA
102. MarkableInputStream BitmapFactory inJustDecodeBounds=true ??? PIXEL DATA PIXEL DATA
103. MarkableInputStream BitmapFactory inJustDecodeBounds=true ??? BitmapFactory PIXEL DATA PIXEL DATA
104. MarkableInputStream BitmapFactory inJustDecodeBounds=true ??? BitmapFactory java.io.IOException: Cannot reset at com.squareup.picasso.MarkableInputStream.reset(MarkableInputStream.java:99) at com.squareup.picasso.BitmapHunter.decodeStream(BitmapHunter.java:140) at com.squareup.picasso.BitmapHunter.hunt(BitmapHunter.java:217) at com.squareup.picasso.BitmapHunter.run(BitmapHunter.java:159) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:457) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636) at java.lang.Thread.run(Thread.java:764) at com.squareup.picasso.Utils$PicassoThread.run(Utils.java:411)
105. BitmapFactory MarkableInputStream InputStream BitmapFactory
106. BitmapFactory MarkableInputStream InputStream Picasso 2.x BitmapFactory Picasso 3.x
107. BitmapFactory MarkableInputStream InputStream Picasso 2.x BitmapFactory BufferedSource Picasso 3.x
108. BitmapFactory MarkableInputStream InputStream Picasso 2.x BitmapFactory BufferedSource Picasso 3.x SourceBufferingInputStream
109. BitmapFactory inJustDecodeBounds=true BufferedSource SourceBufferingInputStream
110. BitmapFactory inJustDecodeBounds=true BufferedSource SourceBufferingInputStream offset: 0
111. BitmapFactory inJustDecodeBounds=true BufferedSource SourceBufferingInputStream 1PIXEL DATA1 3METADATA3 2METADATA2 1METADATA1 MAGIC offset: 0
112. BitmapFactory inJustDecodeBounds=true BufferedSource SourceBufferingInputStream 1PIXEL DATA1 3METADATA3 2METADATA2 1METADATA1 MAGIC offset: 0 1PIXEL DATA1 3METADATA3 2METADATA2 1METADATA1 MAGIC 1024
113. BitmapFactory inJustDecodeBounds=true BufferedSource SourceBufferingInputStream 1PIXEL DATA1 3METADATA3 2METADATA2 1METADATA1 MAGIC offset: 1024 1PIXEL DATA1 3METADATA3 2METADATA2 1METADATA1 MAGIC 0
114. BitmapFactory inJustDecodeBounds=true BufferedSource SourceBufferingInputStream 1PIXEL DATA1 3METADATA3 2METADATA2 1METADATA1 MAGIC offset: 1024 1PIXEL DATA1 3METADATA3 2METADATA2 1METADATA1 MAGIC
115. BitmapFactory inJustDecodeBounds=true BufferedSource SourceBufferingInputStream 1PIXEL DATA1 3METADATA3 2METADATA2 1METADATA1 MAGIC offset: 1024 1PIXEL DATA1 3METADATA3 2METADATA2 1METADATA1 MAGIC
116. BitmapFactory inJustDecodeBounds=true BufferedSource SourceBufferingInputStream 1PIXEL DATA1 3METADATA3 2METADATA2 1METADATA1 MAGIC offset: 1024 1PIXEL DATA1 3METADATA3 2METADATA2 1METADATA1 MAGIC
117. BitmapFactory inJustDecodeBounds=true BufferedSource SourceBufferingInputStream 1PIXEL DATA1 3METADATA3 2METADATA2 1METADATA1 MAGIC offset: 1024
118. BitmapFactory inJustDecodeBounds=true BufferedSource SourceBufferingInputStream 2PIXEL DATA2 3PIXEL DATA3 4PIXEL DATA4 1PIXEL DATA1 3METADATA3 2METADATA2 1METADATA1 MAGIC offset: 1024
119. BitmapFactory inJustDecodeBounds=true BufferedSource SourceBufferingInputStream 2PIXEL DATA2 3PIXEL DATA3 4PIXEL DATA4 1PIXEL DATA1 3METADATA3 2METADATA2 1METADATA1 MAGIC offset: 1024 2PIXEL DATA2 3PIXEL DATA3 4PIXEL DATA4 2048
120. BitmapFactory inJustDecodeBounds=true BufferedSource SourceBufferingInputStream 2PIXEL DATA2 3PIXEL DATA3 4PIXEL DATA4 1PIXEL DATA1 3METADATA3 2METADATA2 1METADATA1 MAGIC offset: 2048 2PIXEL DATA2 3PIXEL DATA3 4PIXEL DATA4 1024
121. BitmapFactory inJustDecodeBounds=true BufferedSource SourceBufferingInputStream 2PIXEL DATA2 3PIXEL DATA3 4PIXEL DATA4 1PIXEL DATA1 3METADATA3 2METADATA2 1METADATA1 MAGIC offset: 2048 2PIXEL DATA2 3PIXEL DATA3 4PIXEL DATA4
122. BitmapFactory inJustDecodeBounds=true BufferedSource SourceBufferingInputStream 2PIXEL DATA2 3PIXEL DATA3 4PIXEL DATA4 1PIXEL DATA1 3METADATA3 2METADATA2 1METADATA1 MAGIC offset: 2048
123. BitmapFactory inJustDecodeBounds=true BufferedSource SourceBufferingInputStream 2PIXEL DATA2 3PIXEL DATA3 4PIXEL DATA4 5PIXEL DATA5 6PIXEL DATA6 7PIXEL DATA7 1PIXEL DATA1 3METADATA3 2METADATA2 1METADATA1 MAGIC offset: 2048
124. BitmapFactory inJustDecodeBounds=true BufferedSource SourceBufferingInputStream 2PIXEL DATA2 3PIXEL DATA3 4PIXEL DATA4 5PIXEL DATA5 6PIXEL DATA6 7PIXEL DATA7 1PIXEL DATA1 3METADATA3 2METADATA2 1METADATA1 MAGIC offset: 2048 5PIXEL DATA5 6PIXEL DATA6 7PIXEL DATA7 3072
125. BitmapFactory inJustDecodeBounds=true BufferedSource SourceBufferingInputStream 2PIXEL DATA2 3PIXEL DATA3 4PIXEL DATA4 5PIXEL DATA5 6PIXEL DATA6 7PIXEL DATA7 1PIXEL DATA1 3METADATA3 2METADATA2 1METADATA1 MAGIC offset: 3072 5PIXEL DATA5 6PIXEL DATA6 7PIXEL DATA7 2048
126. BitmapFactory inJustDecodeBounds=true BufferedSource SourceBufferingInputStream 2PIXEL DATA2 3PIXEL DATA3 4PIXEL DATA4 5PIXEL DATA5 6PIXEL DATA6 7PIXEL DATA7 1PIXEL DATA1 3METADATA3 2METADATA2 1METADATA1 MAGIC offset: 3072 5PIXEL DATA5 6PIXEL DATA6 7PIXEL DATA7
127. BitmapFactory inJustDecodeBounds=true BufferedSource SourceBufferingInputStream 2PIXEL DATA2 3PIXEL DATA3 4PIXEL DATA4 5PIXEL DATA5 6PIXEL DATA6 7PIXEL DATA7 1PIXEL DATA1 3METADATA3 2METADATA2 1METADATA1 MAGIC offset: 3072
128. BitmapFactory inJustDecodeBounds=true BufferedSource SourceBufferingInputStream 2PIXEL DATA2 3PIXEL DATA3 4PIXEL DATA4 5PIXEL DATA5 6PIXEL DATA6 7PIXEL DATA7 8PIXEL DATA8 9PIXEL DATA9 1PIXEL DATA1 3METADATA3 2METADATA2 1METADATA1 MAGIC offset: 3072
129. BitmapFactory inJustDecodeBounds=true BufferedSource SourceBufferingInputStream 2PIXEL DATA2 3PIXEL DATA3 4PIXEL DATA4 5PIXEL DATA5 6PIXEL DATA6 7PIXEL DATA7 8PIXEL DATA8 9PIXEL DATA9 1PIXEL DATA1 3METADATA3 2METADATA2 1METADATA1 MAGIC offset:x3072 8PIXEL DATA8 9PIXEL DATA9 3754
130. BitmapFactory inJustDecodeBounds=true BufferedSource SourceBufferingInputStream 2PIXEL DATA2 3PIXEL DATA3 4PIXEL DATA4 5PIXEL DATA5 6PIXEL DATA6 7PIXEL DATA7 8PIXEL DATA8 9PIXEL DATA9 1PIXEL DATA1 3METADATA3 2METADATA2 1METADATA1 MAGIC offset: 3754 8PIXEL DATA8 9PIXEL DATA9 x3072
131. BitmapFactory inJustDecodeBounds=true BufferedSource SourceBufferingInputStream 2PIXEL DATA2 3PIXEL DATA3 4PIXEL DATA4 5PIXEL DATA5 6PIXEL DATA6 7PIXEL DATA7 8PIXEL DATA8 9PIXEL DATA9 1PIXEL DATA1 3METADATA3 2METADATA2 1METADATA1 MAGIC offset: 3754 8PIXEL DATA8 9PIXEL DATA9
132. BitmapFactory inJustDecodeBounds=true BufferedSource SourceBufferingInputStream 2PIXEL DATA2 3PIXEL DATA3 4PIXEL DATA4 5PIXEL DATA5 6PIXEL DATA6 7PIXEL DATA7 8PIXEL DATA8 9PIXEL DATA9 1PIXEL DATA1 3METADATA3 2METADATA2 1METADATA1 MAGIC offset: 3754
133. BitmapFactory inJustDecodeBounds=true BufferedSource SourceBufferingInputStream 2PIXEL DATA2 3PIXEL DATA3 4PIXEL DATA4 5PIXEL DATA5 6PIXEL DATA6 7PIXEL DATA7 8PIXEL DATA8 9PIXEL DATA9 1PIXEL DATA1 3METADATA3 2METADATA2 1METADATA1 MAGIC offset: 3754 ???
134. BufferedSource 2PIXEL DATA2 3PIXEL DATA3 4PIXEL DATA4 5PIXEL DATA5 6PIXEL DATA6 7PIXEL DATA7 8PIXEL DATA8 9PIXEL DATA9 1PIXEL DATA1 3METADATA3 2METADATA2 1METADATA1 MAGIC offset: 3754 ??? BitmapFactory inJustDecodeBounds=true SourceBufferingInputStream
135. BitmapFactory InputStream BufferedSource 2PIXEL DATA2 3PIXEL DATA3 4PIXEL DATA4 5PIXEL DATA5 6PIXEL DATA6 7PIXEL DATA7 8PIXEL DATA8 9PIXEL DATA9 1PIXEL DATA1 3METADATA3 2METADATA2 1METADATA1 MAGIC BitmapFactory inJustDecodeBounds=true SourceBufferingInputStream
136. BitmapFactory InputStream BufferedSource 2PIXEL DATA2 3PIXEL DATA3 4PIXEL DATA4 5PIXEL DATA5 6PIXEL DATA6 7PIXEL DATA7 8PIXEL DATA8 9PIXEL DATA9 1PIXEL DATA1 3METADATA3 2METADATA2 1METADATA1 MAGIC BitmapFactory inJustDecodeBounds=true SourceBufferingInputStream
137. BitmapFactory InputStream BufferedSource 2PIXEL DATA2 3PIXEL DATA3 4PIXEL DATA4 5PIXEL DATA5 6PIXEL DATA6 7PIXEL DATA7 8PIXEL DATA8 9PIXEL DATA9 1PIXEL DATA1 3METADATA3 2METADATA2 1METADATA1 MAGIC BitmapFactory inJustDecodeBounds=true SourceBufferingInputStream
138. BitmapFactory InputStream BufferedSource 2PIXEL DATA2 3PIXEL DATA3 4PIXEL DATA4 5PIXEL DATA5 6PIXEL DATA6 7PIXEL DATA7 8PIXEL DATA8 9PIXEL DATA9 BitmapFactory inJustDecodeBounds=true SourceBufferingInputStream
139. BitmapFactory InputStream BufferedSource 5PIXEL DATA5 6PIXEL DATA6 7PIXEL DATA7 8PIXEL DATA8 9PIXEL DATA9 BitmapFactory inJustDecodeBounds=true SourceBufferingInputStream
140. BitmapFactory InputStream BufferedSource 8PIXEL DATA8 9PIXEL DATA9 BitmapFactory inJustDecodeBounds=true SourceBufferingInputStream
141. BitmapFactory InputStream BufferedSource BitmapFactory inJustDecodeBounds=true SourceBufferingInputStream
142. BitmapFactory inJustDecodeBounds=true BufferedSource SourceBufferingInputStream offset: 0
143. BitmapFactory inJustDecodeBounds=true BufferedSource SourceBufferingInputStream 1METADATA1 MAGIC offset: 0
144. BitmapFactory inJustDecodeBounds=true BufferedSource SourceBufferingInputStream 1METADATA1 MAGIC offset: 341 1METADATA1 MAGIC
145. BitmapFactory inJustDecodeBounds=true BufferedSource SourceBufferingInputStream 1METADATA1 MAGIC offset: 341 1METADATA1 MAGIC
146. BitmapFactory inJustDecodeBounds=true BufferedSource SourceBufferingInputStream 1METADATA1 MAGIC offset: 341 1METADATA1 MAGIC 1920x1080
147. BufferedSource 1METADATA1 MAGIC 1METADATA1 MAGIC offset: 341 BitmapFactory inJustDecodeBounds=true SourceBufferingInputStream 1920x1080
148. ExifInterface BufferedSource SourceBufferingInputStream 1METADATA1 MAGIC 1METADATA1 MAGIC offset: 341 BitmapFactory inJustDecodeBounds=true SourceBufferingInputStream 1920x1080 offset: 0
149. ExifInterface BufferedSource SourceBufferingInputStream 1METADATA1 MAGIC 1METADATA1 MAGIC offset: 341 BitmapFactory inJustDecodeBounds=true SourceBufferingInputStream 1920x1080 offset: 341 1METADATA1 MAGIC
150. ExifInterface BufferedSource SourceBufferingInputStream 1METADATA1 MAGIC 1METADATA1 MAGIC offset: 341 BitmapFactory inJustDecodeBounds=true SourceBufferingInputStream 1920x1080 offset: 341 1METADATA1 MAGIC
151. ExifInterface BufferedSource SourceBufferingInputStream 1PIXEL DATA1 3METADATA3 2METADATA2 1METADATA1 MAGIC 1METADATA1 MAGIC offset: 341 BitmapFactory inJustDecodeBounds=true SourceBufferingInputStream 1920x1080 offset: 341
152. ExifInterface BufferedSource SourceBufferingInputStream 1PIXEL DATA1 3METADATA3 2METADATA2 1METADATA1 MAGIC 1METADATA1 MAGIC offset: 341 BitmapFactory inJustDecodeBounds=true SourceBufferingInputStream 1920x1080 offset: 1024 1PIXEL DATA1 3METADATA3 2METADATA2 341
153. ExifInterface BufferedSource SourceBufferingInputStream 1PIXEL DATA1 3METADATA3 2METADATA2 1METADATA1 MAGIC 1METADATA1 MAGIC offset: 341 BitmapFactory inJustDecodeBounds=true SourceBufferingInputStream 1920x1080 offset: 1024 1PIXEL DATA1 3METADATA3 2METADATA2 341
154. ExifInterface BufferedSource SourceBufferingInputStream 1PIXEL DATA1 3METADATA3 2METADATA2 1METADATA1 MAGIC 1METADATA1 MAGIC offset: 341 BitmapFactory inJustDecodeBounds=true SourceBufferingInputStream 1920x1080 offset: 1024 1PIXEL DATA1 3METADATA3 2METADATA2 341 90°
155. BufferedSource 1PIXEL DATA1 3METADATA3 2METADATA2 1METADATA1 MAGIC 1METADATA1 MAGIC offset: 341 BitmapFactory inJustDecodeBounds=true SourceBufferingInputStream 1920x1080 offset: 1024 1PIXEL DATA1 3METADATA3 2METADATA2 341 90° ExifInterface SourceBufferingInputStream
156. BitmapFactory InputStream BufferedSource 1PIXEL DATA1 3METADATA3 2METADATA2 1METADATA1 MAGIC 1METADATA1 MAGIC offset: 341 BitmapFactory inJustDecodeBounds=true SourceBufferingInputStream 1920x1080 offset: 1024 1PIXEL DATA1 3METADATA3 2METADATA2 341 90° ExifInterface SourceBufferingInputStream
157. BitmapFactory InputStream BufferedSource 2PIXEL DATA2 3PIXEL DATA3 4PIXEL DATA4 1PIXEL DATA1 3METADATA3 2METADATA2 1METADATA1 MAGIC 1METADATA1 MAGIC offset: 341 BitmapFactory inJustDecodeBounds=true SourceBufferingInputStream 1920x1080 offset: 1024 1PIXEL DATA1 3METADATA3 2METADATA2 341 90° ExifInterface SourceBufferingInputStream
158. BitmapFactory InputStream BufferedSource 2PIXEL DATA2 3PIXEL DATA3 4PIXEL DATA4 5PIXEL DATA5 6PIXEL DATA6 7PIXEL DATA7 1PIXEL DATA1 3METADATA3 2METADATA2 1METADATA1 MAGIC 1METADATA1 MAGIC offset: 341 BitmapFactory inJustDecodeBounds=true SourceBufferingInputStream 1920x1080 offset: 1024 1PIXEL DATA1 3METADATA3 2METADATA2 341 90° ExifInterface SourceBufferingInputStream
159. BitmapFactory InputStream BufferedSource 2PIXEL DATA2 3PIXEL DATA3 4PIXEL DATA4 5PIXEL DATA5 6PIXEL DATA6 7PIXEL DATA7 8PIXEL DATA8 9PIXEL DATA9 1METADATA1 MAGIC offset: 341 BitmapFactory inJustDecodeBounds=true SourceBufferingInputStream 1920x1080 offset: 1024 1PIXEL DATA1 3METADATA3 2METADATA2 341 90° ExifInterface SourceBufferingInputStream
160. BitmapFactory InputStream BufferedSource 5PIXEL DATA5 6PIXEL DATA6 7PIXEL DATA7 8PIXEL DATA8 9PIXEL DATA9 1METADATA1 MAGIC offset: 341 BitmapFactory inJustDecodeBounds=true SourceBufferingInputStream 1920x1080 offset: 1024 1PIXEL DATA1 3METADATA3 2METADATA2 341 90° ExifInterface SourceBufferingInputStream
161. BitmapFactory InputStream BufferedSource 8PIXEL DATA8 9PIXEL DATA9 1METADATA1 MAGIC offset: 341 BitmapFactory inJustDecodeBounds=true SourceBufferingInputStream 1920x1080 offset: 1024 1PIXEL DATA1 3METADATA3 2METADATA2 341 90° ExifInterface SourceBufferingInputStream
162. BitmapFactory InputStream BufferedSource 1METADATA1 MAGIC offset: 341 BitmapFactory inJustDecodeBounds=true SourceBufferingInputStream 1920x1080 offset: 1024 1PIXEL DATA1 3METADATA3 2METADATA2 341 90° ExifInterface SourceBufferingInputStream
163. BitmapFactory InputStream BufferedSource 1METADATA1 MAGIC offset: 341 BitmapFactory inJustDecodeBounds=true SourceBufferingInputStream 1920x1080 offset: 1024 1PIXEL DATA1 3METADATA3 2METADATA2 341 90° ExifInterface SourceBufferingInputStream
164. • Android P • OkHttp 2.x => 3.x
 • Okio integration
 • Improvements 3.x Goals
165. Picasso picasso.load(url) .placeholder(R.drawable.placeholder) .error(R.drawable.error) .fit() .into(view);
166. Picasso
167. Picasso fun loadImage( remoteUri: Uri, @ColorInt tintColor: Int? = null ) { val creator = picasso.load(remoteUri) .placeholder(avatarPlaceholder) .fit() if (transformTintColor != null) { creator.transform(TintTransformation(tintColor)) } creator.into(this) }
168. Picasso fun loadImage( awsAssetUri: Uri, height: Int, width: Int ) { val creator = picasso.load(awsAssetUri) .placeholder(avatarPlaceholder) .fit() .into(this) }
169. Picasso fun loadImage( awsAssetUri: Uri, height: Int, width: Int ) { val creator = picasso.load(awsAssetUri) .placeholder(avatarPlaceholder) .fit() .into(this) }
171. Picasso picasso.load(“http://shrek.jpg”) .placeholder(R.drawable.placeholder) .error(R.drawable.error) .fit() .into(view);
172. Picasso Request “http://shrek.jpg”
173. Picasso Request Request Transformer Request “http://shrek.jpg”
174. Picasso Request “http://shrek.jpg” Request Transformer Request “http://bar.com/20x20/shrek.jpg”
175. http://shrek.jpg
176. 0101011010100 http://shrek.jpg
177. 0101011010100 http://shrek.jpg
181. 01 01 0110 10100 1 1 0 1
182. 01 01 0110 10100 1 1 0 1
185. http://bar.com/20x20/shrek.jpg
186. http://bar.com/20x20/shrek.jpg
187. http://bar.com/20x20/shrek.jpg
193. 01 010 1 1
194. 01 010 1 1
195. 01 010 1 1
199. ?
201. Picasso Request “http://shrek.jpg” Request Transformer Request’ “http://bar.com/20x20/shrek.jpg”
202. Picasso Request Transformer
203. ResourceRequestHandler AssetsRequestHandler NetworkRequestHandler FileRequestHandler Picasso Request Transformer
204. Picasso Request Transformer Handler Request
205. Picasso Request Transformer Request Handler Bitmap
206. Bitmap Drawable Result Picasso Request Transformer Request Handler
207. Picasso Request Transformer Result Request Handler
208. Picasso Request Transformer Result Request Handler Greyscale Circle Tint
209. Greyscale Circle Tint Picasso Request Transformer Result Request Handler Transformation
210. Picasso Request Transformer Result Request Handler Transformation
211. Picasso Request Transformer Result Target Request Handler Transformation
212. Request Transformer Result Request Handler Transformation
213. Transformer Result Transformer Transformer
214. Transformer Transformer Transformer
215. Transformer Transformer Transformer
216. Transformer Transformer Transformer
217. Transformer Transformer Transformer
218. Transformer Transformer Transformer
220. square/okhttp
221. custom interceptors Retry Bridge Cache Connect Call Server square/okhttp
222. custom interceptors Retry Bridge Cache Connect Call Server square/okhttp
223. custom interceptors Retry Bridge Cache Connect Call Server square/okhttp
226. @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Picasso.with(this) .load("http://example.com/logo.png") .into(imageView); }
227. @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Picasso.with(this) .load("http://example.com/logo.png") .into(imageView); }
228. public static Picasso with(Context context) { if (singleton == null) { synchronized (Picasso.class) { if (singleton == null) { singleton = new Builder(context).build(); } } } return singleton; }
229. public static Picasso with(Context context) { if (singleton == null) { synchronized (Picasso.class) { if (singleton == null) { singleton = new Builder(context).build(); } } } return singleton; }
230. public static void setSingletonInstance(Picasso picasso) { synchronized (Picasso.class) { if (singleton != null) { throw new IllegalStateException( "Singleton instance already exists."); } singleton = picasso; } }
231. public static void setSingletonInstance(Picasso picasso) { synchronized (Picasso.class) { if (singleton != null) { throw new IllegalStateException( "Singleton instance already exists."); } singleton = picasso; } }
232. @Module(includes = ThumborModule.class) final class ProductionPicassoModule { @Provides @Singleton static Picasso providePicasso( @App Context context, OkHttpClient client, Thumbor thumbor) { Picasso.RequestTransformer transformer = new PollexorRequestTransformer(thumbor); return new Picasso.Builder(context) .client(client) .requestTransformer(transformer) .listener((picasso, uri, e) -> Timber.d(e, uri.toString())); } }
233. @Module(includes = ThumborModule.class) final class ProductionPicassoModule { @Provides @Singleton static Picasso providePicasso( @App Context context, OkHttpClient client, Thumbor thumbor) { Picasso.RequestTransformer transformer = new PollexorRequestTransformer(thumbor); return new Picasso.Builder(context) .client(client) .requestTransformer(transformer) .listener((picasso, uri, e) -> Timber.d(e, uri.toString())); } }
236. public final class PicassoProvider { private static volatile Picasso instance; public static Picasso get() { if (instance == null) { synchronized (PicassoProvider.class) { if (instance == null) { if (PicassoContentProvider.context == null) { throw new IllegalStateException("context == null"); } instance = new Picasso.Builder(PicassoContentProvider.context).build(); } } } return instance; } }
237. public final class PicassoProvider { private static volatile Picasso instance; public static Picasso get() { if (instance == null) { synchronized (PicassoProvider.class) { if (instance == null) { if (PicassoContentProvider.context == null) { throw new IllegalStateException("context == null"); } instance = new Picasso.Builder(PicassoContentProvider.context).build(); } } } return instance; } }
238. public final class PicassoProvider { private static volatile Picasso instance; public static Picasso get() { if (instance == null) { synchronized (PicassoProvider.class) { if (instance == null) { if (PicassoContentProvider.context == null) { throw new IllegalStateException("context == null"); } instance = new Picasso.Builder(PicassoContentProvider.context).build(); } } } return instance; } }
239. public final class PicassoContentProvider extends ContentProvider { static Context context; @Override public boolean onCreate() { context = getContext(); return true; } … }
241. • Android P • OkHttp 2.x => 3.x
 • Okio integration
 • Improvements 3.x Goals
242. Picasso.with(context)X .load(url) .placeholder(R.drawable.placeholder) .error(R.drawable.error) .fit() .into(view);
243. PicassoProvider.get()X .load(url) .placeholder(R.drawable.placeholder) .error(R.drawable.error) .fit() .into(view); with context
244. picasso.load(url) .placeholder(R.drawable.placeholder) .error(R.drawable.error) .fit() .into(view);
245. abstract class RequestHandler { abstract boolean canHandleRequest(Request request); abstract Result load(Request request, int networkPolicy); }X
246. abstract class RequestHandler { abstract boolean canHandleRequest(Request request); abstract void load(Picasso picasso, Request request, Callback callback); }X Result int networkPolicy
247. Coming Soon
248. • Better separation of concerns: Source/Target/Load Coming Soon
249. • Better separation of concerns: Source/Target/Load • Propagating Drawables to Target (animated GIFs!) Coming Soon
250. • Better separation of concerns: Source/Target/Load • Propagating Drawables to Target (animated GIFs!) • More? Let us know! Coming Soon
251. PICASSO WILL RETURN 3.0
252. Rinsing the Brush: Picasso 3.0 @jrodbx @JakeWharton