Insert date here Droidcon 2021 summary @bkosarzycki

Droidcon Berlin 2021 2

Women in Computer Science 3

Women in Computer Science Margaret Hamilton She was director of the Software Engineering Division of the MIT Instrumentation Laboratory, which developed on-board flight software for NASA's Apollo program. Kathleen Booth Kathleen Booth wrote the first assembly language and designed the assembler and autocode for the first computer systems at Birkbeck College, University of London Barbara Liskov Liskov has led many significant projects, including the Venus operating system, a small, low-cost timesharing system; the design and implementation of CLU; The syntax of CLU was based on ALGOL, Argus, the first high-level language to support implementation of distributed programs and to demonstrate the technique of promise pipelining; and Thor, an object-oriented database system. Ada Lovelace Methematician. Ada Lovelace emphasised the difference between the Analytical Engine and previous calculating machines, particularly its ability to be programmed to solve problems of any complexity Grace Hopper Hopper's belief that programs should be written in a language that was close to English (rather than in machine code or in languages close to machine code, such as assembly languages) was captured in the new business language, and COBOL went on to be the most ubiquitous business language to date. 4

5 Droidcon superstar Chet Haase

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build cache 7

Gradle profile 8

Gradle doctor 9 Nelson Osacky, Soundcloud -

Gradle doctor 10

Gradle doctor 11 What about our 16 GB mackbooks?

Gradle doctor 12

Gradle doctor 13 Check how many daemons you’re using:

Gradle doctor 14 Check how many daemons you’re using:

Gradle doctor 15 Check Java home:

build cache 16

build cache 17

Gradle doctor 18 More about Gradle doctor here:

build cache 19 MORE INFO: https://speakerdeck.com/runningcode/what-is-the-android-cache-fix-plugin-and-why-do-i-need-t o-solve-my-own-cache-misses?slide=14 https://medium.com/@cesarmcferreira/using-gradle-build-cache-server-73d7680baf2a https://stackoverflow.com/questions/60528123/how-to-disable-gradles-local-build-cache-but-keep -remote-cache-enabled

Idiomatic Unit Testing - Kotlin Similar to: https://phauer.com/2018/best-practices-unit-testing-kotlin/#recap-what-is-idiomatic-kotlin-c ode TLDR: don’t use static variables; favour val instead of var and try to write common logic between test suites 20

Jetpack Compose 21

Jetpack Compose 22

Jetpack Compose - samples 23 https://github.com/android/compose-samples

Jetpack Compose - testing 24 - don’t have to put Id’s - jetpack preview performance has been greatly improved

Jetpack Compose - testing 25

Jetpack Compose - testing - we can add additional tags for testing 26

Jetpack Compose - useUnmergedTree - then we can ui-test using these tags more here: https://developer.android.com/jetpack/compose/semantics 27

Jetpack Compose - testing 28

ATD - Automated Test Devices 29

ATD - Automated Test Devices API for Android Emulators: 30 Gradle Managed Devices (GMD) - more info here

ATD - Automated Test Devices 31

Jetpack compose - lottiefiles ? Do you know any alternative to lottiefiles which can be used with Compose? > you don’t need one - Lottie already supports Compose LINK 32 dependencies { implementation 'com.airbnb.android:lottie-compose:1.0.0-alpha02' }

Josef Raska - Module Rules [gradle] Reference: https://github.com/jraska/modules-graph-assert/blob/master/presentation/REFERENCES.md GRAPH ASSERT plugin 33

Josef Raska - Module Rules [gradle] 34

Josef Raska - Module Rules [gradle] 35 SAMPLE

Josef Raska - Module Rules [gradle] 36

Flutter: Animation examples 37

Flutter: Animation examples 38

Flutter: Animation examples 39

Flutter: Animation examples 40

Flutter: Animation examples Emily Fortuna - Animation - Flutter Europe https://www.youtube.com/watch?v=wnARLByOtKA 41

Flutter: Animation examples Web app: https://roszkowski.dev/animations/ Pdf: https://github.com/orestesgaolin/ animations_samples/blob/master/docs/ presentation.pdf 42

Don’t kill my app 43

Don’t kill my app - benchmark 44

Android 12 - Exoplayer 45 https://github.com/google/ExoPlayer/releases/tag/r2.16.0

Android 12 - Exoplayer 46

THANK YOU @bkosarzycki