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我正在使用Android Annotations，我想实现一个简单的片段来测试它，所以我主要使用它通过@ViewById 将视图绑定到它们的ID。当我启动片段时，我通过注释进行绑定，然后使用 @AfterViews 执行其他操作。但是，我看到的只是一个空白屏幕。

流程：活动开始 -> 插入片段 -> 空白屏幕

@EActivity(R.layout.activity_add_buddy)
public class AddBuddyActivityNew extends AppCompatActivity {

/**
 * Simply performing frag transaction to place the add from contacts fragment
 * @param savedInstanceState
 */
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    FragmentTransaction transaction = getFragmentManager().beginTransaction();
    transaction.replace(R.id.add_buddy_container,     AddFromContactsFragment.newInstance(), ConstantValues.Tag.ADD_FROM_CONTACTS);
    transaction.commit();
}



@EFragment(R.layout.fragment_add_from_contacts)
public class AddFromContactsFragment extends Fragment implements     LoaderManager.LoaderCallbacks<Cursor>,GetUsernamesFromPhoneNumbersListener,AddFrom    ContactsActivityAdapter.AddBuddyInterface, AddBuddyListener,     SearchView.OnQueryTextListener, UsernameExistsListener {
private static final String LOG_TAG =     AddFromContactsFragment.class.getCanonicalName();
private static final int PERMISSIONS_REQUEST_CONTACTS = 0;
private SessionManager sessionManager;
private LBDatabaseHelper databaseHelper;

HashMap<String,String> numbersAndNames;
AddFromContactsActivityAdapter addFromContactsActivityAdapter;
private ContactsHandler handler;
private Timer timer;

/** UI References */
@ViewById(R.id.add_buddy_button) TextView addBuddyButton;
@ViewById(R.id.user_input_textview) TextView addBuddyUserInput;
@ViewById(R.id.user_input_error_display) TextView inputErrorDisplay;
@ViewById(R.id.user_input_layout) RelativeLayout userInputLayout;
@ViewById(R.id.finding_friends_layout) RelativeLayout findingFriendsLayout;
@ViewById(R.id.no_permission_layout) RelativeLayout noPermissionsLayout;
@ViewById(R.id.add_from_contacts_snackbar) CoordinatorLayout coordinatorLayout;
@ViewById(R.id.add_from_contacts_listview) ListView contactsList;
@ViewById(R.id.add_from_contacts_searchview) SearchView searchView;
@ViewById(R.id.add_from_contacts_progressbar) ProgressBar progressBar;
ProgressDialog progressDialog;

private String currentQuery; // User's current query

/**
 * Grab a new instance of this fragment
 */
public static AddFromContactsFragment newInstance() {
    return new AddFromContactsFragment();
}

/**
 * Called after the views are set, place all view logic here
 */
@AfterViews
void afterAddFromContactsViews() {
    Log.d(LOG_TAG, "after views start");
    contactsList.setVisibility(View.GONE);
    // Get the SearchView and set the searchable configuration
    SearchManager searchManager = (SearchManager) getActivity().getSystemService(Context.SEARCH_SERVICE);
    searchView.setSearchableInfo(searchManager.getSearchableInfo(getActivity().getComponentName()));
    searchView.setIconifiedByDefault(false); // iconify the widget, don't expand it by default
    searchView.setOnQueryTextListener(this);
    searchView.setBackgroundColor(Color.WHITE);
    contactsList.setAdapter(addFromContactsActivityAdapter);
    handler = new ContactsHandler(findingFriendsLayout, addFromContactsActivityAdapter, getActivity(), contactsList); // The handler that will do all the hard stuff
    if (sessionManager.getUserContactPermission()) {
        checkForPermissions();
    } else {
        createAskForContactPermissionDialog();
    }
    Log.d(LOG_TAG, "after views end");
}

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    Log.d(LOG_TAG, "on create start");
    sessionManager = SessionManager.getInstance(getActivity());
    databaseHelper = LBDatabaseHelper.getInstance(getActivity());
    timer = new Timer();
    addFromContactsActivityAdapter = new AddFromContactsActivityAdapter(getActivity(), this, new ArrayList<Buddy>()); // Instantiate so handler doesn't get a null one
    Log.d(LOG_TAG, "on create end");
}

onCreate() 在片段中被调用，但不是 @AfterViews 方法。有人可以帮忙吗？谢谢。此外，新类正在由 AA 生成。

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1 回答 1

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哇，相对较快地弄清楚了，但我会把它留在这里，以防其他人自己遇到这个问题。

答案是我调用的棘手的 newInstance() 方法来获取 Fragment 的一个实例。

/**
* Grab a new instance of this fragment
*/
public static AddFromContactsFragment newInstance() {
return new AddFromContactsFragment();
}

这需要修改以返回生成类型 AddFromContactsFragment_ 的 Fragment。下划线很重要，因为它是 Android Annotations 版本。同样（我已经知道），创建 Intent 时，您必须使用 Activity 的“_”后缀版本来制作它们。

于 2016-03-07T01:31:08.597 回答