Android annotations REST
使用前：
1 public class BookmarksToClipboardActivity extends Activity { 2 3 BookmarkAdapter adapter; 4 5 ListView bookmarkList; 6 7 EditText search; 8 9 BookmarkApplication application; 10 11 Animation fadeIn; 12 13 ClipboardManager clipboardManager; 14 15 @Override 16 protected void onCreate(Bundle savedInstanceState) { 17 super.onCreate(savedInstanceState); 18 19 requestWindowFeature(Window.FEATURE_NO_TITLE); 20 getWindow().setFlags(FLAG_FULLSCREEN, FLAG_FULLSCREEN); 21 22 setContentView(R.layout.bookmarks); 23 24 bookmarkList = (ListView) findViewById(R.id.bookmarkList); 25 search = (EditText) findViewById(R.id.search); 26 application = (BookmarkApplication) getApplication(); 27 fadeIn = AnimationUtils.loadAnimation(this, anim.fade_in); 28 clipboardManager = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE); 29 30 View updateBookmarksButton1 = findViewById(R.id.updateBookmarksButton1); 31 updateBookmarksButton1.setOnClickListener(new OnClickListener() { 32 33 @Override 34 public void onClick(View v) { 35 updateBookmarksClicked(); 36 } 37 }); 38 39 View updateBookmarksButton2 = findViewById(R.id.updateBookmarksButton2); 40 updateBookmarksButton2.setOnClickListener(new OnClickListener() { 41 42 @Override 43 public void onClick(View v) { 44 updateBookmarksClicked(); 45 } 46 }); 47 48 bookmarkList.setOnItemClickListener(new OnItemClickListener() { 49 50 @Override 51 public void onItemClick(AdapterView<?> p, View v, int pos, long id) { 52 Bookmark selectedBookmark = (Bookmark) p.getAdapter().getItem(pos); 53 bookmarkListItemClicked(selectedBookmark); 54 } 55 }); 56 57 initBookmarkList(); 58 } 59 60 void initBookmarkList() { 61 adapter = new BookmarkAdapter(this); 62 bookmarkList.setAdapter(adapter); 63 } 64 65 void updateBookmarksClicked() { 66 UpdateBookmarksTask task = new UpdateBookmarksTask(); 67 68 task.execute(search.getText().toString(), application.getUserId()); 69 } 70 71 private static final String BOOKMARK_URL = // 72 "http://www.bookmarks.com/bookmarks/{userId}?search={search}"; 73 74 75 class UpdateBookmarksTask extends AsyncTask<String, Void, Bookmarks> { 76 77 @Override 78 protected Bookmarks doInBackground(String... params) { 79 String searchString = params[0]; 80 String userId = params[1]; 81 82 RestTemplate client = new RestTemplate(); 83 HashMap<String, Object> args = new HashMap<String, Object>(); 84 args.put("search", searchString); 85 args.put("userId", userId); 86 HttpHeaders httpHeaders = new HttpHeaders(); 87 HttpEntity<Bookmarks> request = new HttpEntity<Bookmarks>(httpHeaders); 88 ResponseEntity<Bookmarks> response = client.exchange( // 89 BOOKMARK_URL, HttpMethod.GET, request, Bookmarks.class, args); 90 Bookmarks bookmarks = response.getBody(); 91 92 return bookmarks; 93 } 94 95 @Override 96 protected void onPostExecute(Bookmarks result) { 97 adapter.updateBookmarks(result); 98 bookmarkList.startAnimation(fadeIn); 99 } 100 101 } 102 103 void bookmarkListItemClicked(Bookmark selectedBookmark) { 104 clipboardManager.setText(selectedBookmark.getUrl()); 105 } 106 107 }
使用后：
1 @NoTitle 2 @Fullscreen 3 @EActivity(R.layout.bookmarks) 4 public class BookmarksToClipboardActivity extends Activity { 5 6 BookmarkAdapter adapter; 7 8 @ViewById 9 ListView bookmarkList; 10 11 @ViewById 12 EditText search; 13 14 @App 15 BookmarkApplication application; 16 17 @RestService 18 BookmarkClient restClient; 19 20 @AnimationRes 21 Animation fadeIn; 22 23 @SystemService 24 ClipboardManager clipboardManager; 25 26 @AfterViews 27 void initBookmarkList() { 28 adapter = new BookmarkAdapter(this); 29 bookmarkList.setAdapter(adapter); 30 } 31 32 @Click({R.id.updateBookmarksButton1, R.id.updateBookmarksButton2}) 33 void updateBookmarksClicked() { 34 searchAsync(search.getText().toString(), application.getUserId()); 35 } 36 37 @Background 38 void searchAsync(String searchString, String userId) { 39 Bookmarks bookmarks = restClient.getBookmarks(searchString, userId); 40 updateBookmarks(bookmarks); 41 } 42 43 @UiThread 44 void updateBookmarks(Bookmarks bookmarks) { 45 adapter.updateBookmarks(bookmarks); 46 bookmarkList.startAnimation(fadeIn); 47 } 48 49 @ItemClick 50 void bookmarkListItemClicked(Bookmark selectedBookmark) { 51 clipboardManager.setText(selectedBookmark.getUrl()); 52 } 53 54 }
1 @Rest("http://www.bookmarks.com") 2 public interface BookmarkClient { 3 4 @Get("/bookmarks/{userId}?search={search}") 5 Bookmarks getBookmarks(String search, String userId); 6 7 }
且利用androidannotations的Rest注解替换手工建立Spring Android RestTemplate对象，不仅可以减少很多代码，同时使工程结构更简洁、严谨，利于复用。
自己构造RestTemplate的原生写法：
1 HttpHeaders requestHeaders = new HttpHeaders(); 2 List<MediaType> acceptableMediaTypes = new ArrayList<MediaType>(); 3 acceptableMediaTypes.add(MediaType.APPLICATION_JSON); 4 requestHeaders.setAccept(acceptableMediaTypes); 5 6 HttpEntity<?> requestEntity = new HttpEntity<Object>(requestHeaders); 7 8 RestTemplate restTemplate = new RestTemplate(); 9 restTemplate.getMessageConverters().add(new MappingJackson2HttpMessageConverter()); 10 11 ResponseEntity<User[]> responseEntity = restTemplate.exchange(url, HttpMethod.GET, requestEntity, User[].class);
利用androidannotations的Rest注解替换后的代码：
1 //初始化 2 @RestService 3 RestApiService restApiService; 4 ResponseEntity<User[]> responseEntity = restApiService.getByStatus();
1 @Rest(rootUrl = "http://10.0.2.2:8080/together/api", converters = { MappingJackson2HttpMessageConverter.class }) 2 public interface RestApiService { 3 4 @Get("/user/getByStatus.do?status=1") 5 ResponseEntity<User[]> getUsersByStatus(); 6 7 }
wiki api :
