Question

虽然我想尽可能以编程方式编写所有内容，并将XML留空，但这在我工作的地方是不可能的（设计人员不能使用原始程序代码......）

所以，就此而言，我使用或构建的几乎所有活动都在某处开始时包含一大块findViewById。

如果我必须从头开始创建它，这是特别痛苦的，我现在可以以编程方式创建一个按钮数组并将其添加到布局中...幸好他们会让我这样做，如果它达到10+元素它们都是同一类型。

有没有办法避免这种情况？或者让它自动将其转换为我分配给它的方法？所以我不需要输入Button mButton =（Button）findview ...

如果有某种方法可以自动生成按钮的java实例以及XML中没有的内容，那么布局会很好（特别是如果名称很好且可自动完成）。

Answer 1

尝试使用Android annotations
AndroidAnnotations是一个开源框架，可加速Android开发。它负责管道，让您专注于真正重要的事情。通过简化代码，便于维护这是一个简单的示例，说明您的代码如何显着缩小，并且变得更容易理解：

之前 Android Annotations


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) findViewById(R.id.bookmarkList);
    search = (EditText) findViewById(R.id.search);
    application = (BookmarkApplication) getApplication();
    fadeIn = AnimationUtils.loadAnimation(this, anim.fade_in);
    clipboardManager = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);

    View updateBookmarksButton1 = findViewById(R.id.updateBookmarksButton1);
    updateBookmarksButton1.setOnClickListener(new OnClickListener() {

      @Override
      public void onClick(View v) {
        updateBookmarksClicked();
      }
    });

    View updateBookmarksButton2 = findViewById(R.id.updateBookmarksButton2);
    updateBookmarksButton2.setOnClickListener(new OnClickListener() {

      @Override
      public void onClick(View v) {
        updateBookmarksClicked();
      }
    });

    bookmarkList.setOnItemClickListener(new OnItemClickListener() {

      @Override
      public void onItemClick(AdapterView p, View v, int pos, long id) {
        Bookmark selectedBookmark = (Bookmark) p.getAdapter().getItem(pos);
        bookmarkListItemClicked(selectedBookmark);
      }
    });

    initBookmarkList();
  }

  void initBookmarkList() {
    adapter = new BookmarkAdapter(this);
    bookmarkList.setAdapter(adapter);
  }

  void updateBookmarksClicked() {
    UpdateBookmarksTask task = new UpdateBookmarksTask();

    task.execute(search.getText().toString(), application.getUserId());
  }

  private static final String BOOKMARK_URL = //
  "http://www.bookmarks.com/bookmarks/{userId}?search={search}";


  class UpdateBookmarksTask extends AsyncTask {

    @Override
    protected Bookmarks doInBackground(String... params) {
      String searchString = params[0];
      String userId = params[1];

      RestTemplate client = new RestTemplate();
      HashMap args = new HashMap();
      args.put("search", searchString);
      args.put("userId", userId);
      HttpHeaders httpHeaders = new HttpHeaders();
      HttpEntity request = new HttpEntity(httpHeaders);
      ResponseEntity response = client.exchange( //
          BOOKMARK_URL, HttpMethod.GET, request, Bookmarks.class, args);
      Bookmarks bookmarks = response.getBody();

      return bookmarks;
    }

    @Override
    protected void onPostExecute(Bookmarks result) {
      adapter.updateBookmarks(result);
      bookmarkList.startAnimation(fadeIn);
    }

  }

  void bookmarkListItemClicked(Bookmark selectedBookmark) {
    clipboardManager.setText(selectedBookmark.getUrl());
  }

}

<强>后：


@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
  void initBookmarkList() {
    adapter = new BookmarkAdapter(this);
    bookmarkList.setAdapter(adapter);
  }

  @Click({R.id.updateBookmarksButton1, R.id.updateBookmarksButton2})
  void updateBookmarksClicked() {
    searchAsync(search.getText().toString(), application.getUserId());
  }

  @Background
  void searchAsync(String searchString, String userId) {
    Bookmarks bookmarks = restClient.getBookmarks(searchString, userId);
    updateBookmarks(bookmarks);
  }

  @UiThread
  void updateBookmarks(Bookmarks bookmarks) {
    adapter.updateBookmarks(bookmarks);
    bookmarkList.startAnimation(fadeIn);
  }

  @ItemClick
  void bookmarkListItemClicked(Bookmark selectedBookmark) {
    clipboardManager.setText(selectedBookmark.getUrl());
  }

}

是否有更好的方法将XML元素与Android中的java类链接起来比findViewById（）更好

1 个答案: