Android Taipei - Jul 2019 Talk about AndroidX migration

1. X: First Class
Kami
#AndroidTaipei

2. Ref: https://developer.android.com/jetpack/androidx/migrate

3. KEEP
CALM
AND
ROID
X

4. Why AndroidX ?
The support library artifacts are being deprecated and
all feature development is going into AndroidX.

6. Step
1. Upgrade support library v28.0.0↑
2. Upgrade 3rd library version before supporting X
3. Modify gradle.properties
4. Migrate all dependencies supporting X
5. Replace X package
6. Fix unresolved or deprecated things
7. Follow X progress of libraries haven’t support X

7. gradle.properties
android.useAndroidX=true
android.enableJetifier=true

8. #!/usr/bin/env bash
MAPPING_FILE=path/to/androidx-class-mapping.csv
PROJECT_DIR=path/to/android/project
replace=""
while IFS=, read -r from to
do
replace+="; s/$from/$to/g"
done <<< "$(cat $MAPPING_FILE)"
find $PROJECT_DIR ( -name "*.kt" -o -name "*.java" -o -name "*.xml" ) -type f -not -path '*/.git*' -print0 |
xargs -0 gsed -i "$replace"
Ref: https://gist.github.com/dlew/5db1b780896bbc6f542e7c00a11db6a0

9. Ref: https://issuetracker.google.com/issues/119776865

10. import androidx.gridlayout.widget.GridLayoutManager
recyclerview
e.g. unresolved - 1

11. Ref:
https://github.com/googlesamples/android-architecture/commit/4d435d28f020ea45b6746e05efdff97d0c357b26#diff-2
4e499d4a814ef202cf522debced827a
e.g. unresolved - 2

12. import androidx.test.runner.AndroidJUnit4
import androidx.test.ext.junit.runners.AndroidJUnit4
e.g. deprecated - 1
androidTestImplementation "androidx.test.ext:junit:${version}"

13. import androidx.test.InstrumentationRegistry
import androidx.test.platform.app.InstrumentationRegistry
e.g. deprecated - 2

14. Merge Nightmares
Just re-run the script

15. Jetifier Limitations

16. Ref: https://issuetracker.google.com/issues/115738511

17. Ref: https://issuetracker.google.com/issues/123060356

18. gradle.properties (After X… )
android.useAndroidX=true
android.enableJetifier=false

19. $ ./gradlew :app:dependencies > a.txt

20. +--- com.google.dagger:dagger-android-support:2.16
| +--- com.google.dagger:dagger:2.16 (*)
| +--- com.google.dagger:dagger-android:2.16
| | +--- com.google.dagger:dagger:2.16 (*)
| | +--- com.android.support:support-annotations:25.0.0 -> 26.1.0
| | --- javax.inject:javax.inject:1

21. Ref: https://github.com/google/dagger/issues/1181

22. Ref: https://android-developers.googleblog.com/2019/06/google-play-services-and-firebase.html

23. Thanks