Version Management
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The document discusses version management for mobile applications. When an application is updated, changes may need to be made to the database, preferences, or data models. The author proposes using an annotation-based library called Fit that automatically calls version-specific procedures based on the application's current and previous version codes, avoiding the need for multiple "if" statements. This allows defining version-specific behavior through annotated methods in a VersionModule class.
Version Management
- 1. Version Management @KeithYokoma - Drivemode, Inc. potatotips #11
- 2. KeithYokoma Keishin Yokomaku Drivemode, Inc. Android Engineer GitHub: https://github.com/KeithYokoma e-Book: http://amzn.to/1mZNydv
- 3. When your application is updated¡
- 4. You may¡ ? Change database scheme ? Write new preferences ? Migrate to new data models ? Trigger data synchronization ? and so on¡
- 5. It could happen! int current = // get current version code from PackageManager int previous = // read previous version from Preference if (current <= previous) { return; } if (previous < 1) {} // do when the app is updated from 0 if (previous < 2) {} // do when the app is updated from 0 or 1 if (previous < 3) {} // do when the app is updated from 0 ~ 2 if (previous < 4) {} if (previous < 5) {} if (previous < 6) {}
- 6. It could happen! int current = // get current version code from PackageManager int previous = // read previous version from Preference if (current <= previous) { return; } if (previous < 1) {} // do when the app is updated from 0 if (previous < 2) {} // do when the app is updated from 0 or 1 if (previous < 3) {} // do when the app is updated from 0 ~ 2 if (previous < 4) {} if (previous < 5) {} if (previous < 6) {}
- 7. Too many ¡°if¡± statement! int current = // get current version code from PackageManager int previous = // read previous version from Preference if (current <= previous) { return; } if (previous < 1) {} // do when the app is updated from 0 if (previous < 2) {} // do when the app is updated from 0 or 1 if (previous < 3) {} // do when the app is updated from 0 ~ 2 if (previous < 4) {} if (previous < 5) {} if (previous < 6) {}
- 8. Just ?t for you https://github.com/KeithYokoma/Fit
- 9. Fit ? Annotation based ? Automatically call your procedure ? Reusable method declaration ? No more dull ¡°if¡± statement
- 10. Version Module class public class MyModule implements VersionModule { // foo() is called when the app is updated to // version code = 1, 2 and 3 @VersionCode({1, 2, 3}) public void foo() {} // bar() is called when the app is updated to version code = 4 @VersionCode(4) public void bar() {} }
- 11. Version Module class public class MyModule implements VersionModule { // foo() is called when the app is updated to // version code = 1, 2 and 3 @VersionCode({1, 2, 3}) public void foo() {} // bar() is called when the app is updated to version code = 4 @VersionCode(4) public void bar() {} }
- 12. Version Module class public class MyModule implements VersionModule { // foo() is called when the app is updated to // version code = 1, 2 and 3 @VersionCode({1, 2, 3}) public void foo() {} // bar() is called when the app is updated to version code = 4 @VersionCode(4) public void bar() {} }
- 13. Application class public class MyApplication extends Application { @Override public void onCreate() { super.onCreate(); Fit.initialize(this, new MyModule()); Fit.getInstance().execute(); } }
- 14. Application class public class MyApplication extends Application { @Override public void onCreate() { super.onCreate(); Fit.initialize(this, new MyModule()); Fit.getInstance().execute(); } }
- 15. Application class public class MyApplication extends Application { @Override public void onCreate() { super.onCreate(); Fit.initialize(this, new MyModule()); Fit.getInstance().execute(); } }
- 16. That¡¯s it!
- 17. Behaviour Version 1 to 4 public class MyModule implements VersionModule { // foo() is called when the app is updated to // version code = 1, 2 and 3 @VersionCode({1, 2, 3}) public void foo() {} // bar() is called when the app is updated to version code = 4 @VersionCode(4) public void bar() {} }
- 18. Behaviour Version 1 to 4 public class MyModule implements VersionModule { // foo() is called when the app is updated to // version code = 1, 2 and 3 @VersionCode({1, 2, 3}) public void foo() {} // bar() is called when the app is updated to version code = 4 @VersionCode(4) public void bar() {} }
- 19. Behaviour Version 1 to 4 public class MyModule implements VersionModule { // foo() is called when the app is updated to // version code = 1, 2 and 3 @VersionCode({1, 2, 3}) public void foo() {} // bar() is called when the app is updated to version code = 4 @VersionCode(4) public void bar() {} }
- 20. Behaviour Version 1 to 4 public class MyModule implements VersionModule { // foo() is called when the app is updated to // version code = 1, 2 and 3 @VersionCode({1, 2, 3}) public void foo() {} // bar() is called when the app is updated to version code = 4 @VersionCode(4) public void bar() {} }
- 21. Behaviour Version 1 to 4 public class MyModule implements VersionModule { // foo() is called when the app is updated to // version code = 1, 2 and 3 @VersionCode({1, 2, 3}) public void foo() {} // bar() is called when the app is updated to version code = 4 @VersionCode(4) public void bar() {} }
- 22. Behaviour Version 3 to 4 public class MyModule implements VersionModule { // foo() is called when the app is updated to // version code = 1, 2 and 3 @VersionCode({1, 2, 3}) public void foo() {} // bar() is called when the app is updated to version code = 4 @VersionCode(4) public void bar() {} }
- 23. Behaviour Version 3 to 4 public class MyModule implements VersionModule { // foo() is called when the app is updated to // version code = 1, 2 and 3 @VersionCode({1, 2, 3}) public void foo() {} // bar() is called when the app is updated to version code = 4 @VersionCode(4) public void bar() {} }
- 24. Behaviour Version 3 to 4 public class MyModule implements VersionModule { // foo() is called when the app is updated to // version code = 1, 2 and 3 @VersionCode({1, 2, 3}) public void foo() {} // bar() is called when the app is updated to version code = 4 @VersionCode(4) public void bar() {} }
- 25. Version Management @KeithYokoma - Drivemode, Inc. potatotips #11