Android Opensources - ButterKnife, Lombok
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This document discusses three Android annotation libraries: ButterKnife, Lombok, and Android Annotations. It provides examples of how each library can simplify finding and injecting views, generating getters and setters, and processing annotations for Android activities without requiring as much boilerplate code. Specific features covered include ButterKnife's injection of views to reduce findViewById calls, Lombok's automatic generation of getters and setters, and Android Annotations' processing of annotations for configuration and injection in Android classes.
Android Opensources - ButterKnife, Lombok
- 1. Android Opensources Wooseong Kim (???) 1 Yooii Studios
- 2. 1. ButterKnife 2. Lombok 3.Android Annotations Yooii Studios2
- 4. ? http://jakewharton.github.io/butterknife/ ? using Annotation Processing ? No more ?ndViewById in Activity, View, ListAdapter etc. ? Simplify click listeners ButterKnife 4 Yooii Studios
- 5. ButterKnife - before / at activity class ExampleActivity extends Activity { TextView title; TextView subtitle; TextView footer; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.simple_activity); title = (TextView) ?ndViewById(R.id.title); subtitle = (TextView) ?ndViewById(R.id.subtitle); footer = (TextView) ?ndViewById(R.id.footer); //TODO Use views... } } 5 Yooii Studios
- 6. ButterKnife - after / at activity class ExampleActivity extends Activity { @InjectView(R.id.title)TextView title; @InjectView(R.id.subtitle)TextView subtitle; @InjectView(R.id.footer)TextView footer; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.simple_activity); ButterKnife.inject(this); //TODO Use "injected" views... } } 6 Yooii Studios
- 7. ButterKnife - after / at view public class FancyFragment extends Fragment { @InjectView(R.id.button1) Button button1; @InjectView(R.id.button2) Button button2; @OverrideView onCreateView(LayoutIn?ater in?ater,ViewGroup container, Bundle savedInstanceState) { View view = in?ater.in?ate(R.layout.fancy_fragment, container, false); ButterKnife.inject(this, view); //TODO Use "injected" views... return view; } } 7 Yooii Studios
- 8. ButterKnife - after / at list adapter public class MyAdapter extends BaseAdapter { @Override publicView getView(int position,View view,ViewGroup parent) { ViewHolder holder; view = in?ater.in?ate(R.layout.whatever, parent, false); holder = new ViewHolder(view); holder.name.setText("John Doe"); // etc... return convertView; static classViewHolder { @InjectView(R.id.title)TextView name; @InjectView(R.id.job_title)TextView jobTitle; publicViewHolder(View view) { ButterKnife.inject(this, view); } } } 8 Yooii Studios
- 9. ButterKnife - onClick @OnClick({ R.id.door1, R.id.door2, R.id.door3 }) public void pickDoor(DoorView door) { if (door.hasPrizeBehind()) { Toast.makeText(this, "You win!", LENGTH_SHORT).show(); } else { Toast.makeText(this, "Try again", LENGTH_SHORT).show(); } } 9 Yooii Studios
- 10. Lombok ? 10 Yooii Studios
- 11. ? http://projectlombok.org/ ? No more Getter / Setter! Lombok 11 Yooii Studios
- 12. Lombok - before public class GetterSetterExample { private int age = 10; private String name; public int getAge() { return age; } public void setAge(int age) { this.age = age; } protected void setName(String name) { this.name = name; } } 12 Yooii Studios
- 13. Lombok - after public class GetterSetterExample { @Getter @Setter private int age = 10; @Setter(AccessLevel.PROTECTED) private String name; } 13 Yooii Studios
- 14. Android Annotations ? 14 Yooii Studios
- 15. Android Annotations - before public class BookmarksToClipboardActivity extends Activity { BookmarkAdapter adapter; ListView bookmarkList; EditText search; BookmarkApplication application; Animation fadeIn; ClipboardManager clipboardManager; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); getWindow().setFlags(FLAG_FULLSCREEN, FLAG_FULLSCREEN); setContentView(R.layout.bookmarks); bookmarkList = (ListView) ?ndViewById(R.id.bookmarkList); search = (EditText) ?ndViewById(R.id.search); application = (BookmarkApplication) getApplication(); fadeIn = AnimationUtils.loadAnimation(this, anim.fade_in); clipboardManager = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE); View updateBookmarksButton1 = ?ndViewById(R.id.updateBookmarksButton1); updateBookmarksButton1.setOnClickListener(new OnClickListener() { 15 Yooii Studios
- 16. Android Annotations - after @NoTitle @Fullscreen @EActivity(R.layout.bookmarks) public class BookmarksToClipboardActivity extends Activity { BookmarkAdapter adapter; @ViewById ListView bookmarkList; @ViewById EditText search; @App BookmarkApplication application; @RestService BookmarkClient restClient; @AnimationRes Animation fadeIn; @SystemService ClipboardManager clipboardManager; @AfterViews // instead of onCreate() (called after injecting) void initBookmarkList() { adapter = new BookmarkAdapter(this); bookmarkList.setAdapter(adapter); } 16 Yooii Studios
- 17. To be continued´ ? Robolectric (2.2+) -Testing - http://robolectric.org/ ? Otto - Event handler using bus - http://square.github.io/otto/ 17 Yooii Studios
- 18. Thank you! 18 Yooii Studios