如何在使用ActionBarSherlock創建Activity之後刷新Fragment

Question

我想在運行時創建事物，並且在我想要設置的FragmentActivity中使用全局變量，然後由onActivityCreated（）方法中的Fragments使用它們。但是顯然它們在創建時是空的，直到創建Fragment之後才需要使用這些數據。有沒有人制定過這樣做的好方法？我目前使用ActionBarSherlock來做到這一點。

我希望能夠刷新片段，但不是活動，因爲一切都會再次爲空。

請任何人都可以幫助我。先謝謝你。

FragmentActivity代碼：

public class SlidingTabsActivity extends SherlockFragmentActivity 
{ 

/* Sliding tabs */ 
private ViewPager viewPager; 
private TabsAdapter tabsAdapter; 
private ActionBar actionBarTabs; 

/* Custom tab view */ 
private LayoutInflater customTabViewLayoutInflater; 
private View customTabView; 

/* Layer interfaces */ 
private CommsLayerInterface commsLayerInterface; 
private DeviceLayerInterface deviceLayerInterface; 

private PopupFirmware popupFirmware; // Popup firmware class instance 

/* Data set information */ 
private DeviceInfo deviceInfo; 
private Pages pages; 
private Page page1; 
private Page page2; 
private Page page3; 

@Override 
protected void onCreate(Bundle savedInstanceState) 
{ 
    super.onCreate(savedInstanceState); 

    viewPager = new ViewPager(this); 
    viewPager.setId(R.id.pager); 
    setContentView(viewPager); 

    tabsAdapter = new TabsAdapter(this, viewPager); // Declares the tabs adapter class with the view pager view 

    popupFirmware = new PopupFirmware(this); // Declaring popup firmware class 

    commsLayerInterface = new CommsLayerInterface(); 
    deviceLayerInterface = new DeviceLayerInterface(this); 

    deviceLayerInterface.setCommsLayerInterface(commsLayerInterface); 

    /* Custom tab view instances */ 
    customTabViewLayoutInflater = (LayoutInflater) this.getBaseContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
    customTabView = customTabViewLayoutInflater.inflate(R.layout.tabs_spinner, null); 

    /* Custom view functions */ 
    TabCustomViewFunctions.createSpinnerList(this, customTabView, deviceLayerInterface); 
    TabCustomViewFunctions.createNewFile(this, customTabView, deviceLayerInterface); 
    TabCustomViewFunctions.saveFile(customTabView, deviceLayerInterface); 

    /* Set up pages and device info */ 
    deviceInfo = deviceLayerInterface.getDeviceInfo(); 
    pages = deviceLayerInterface.getPages(); 
    setUpPages(pages); 

    /* Action Bar */ 
    actionBarTabs = getSupportActionBar(); 
    actionBarTabs.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS); 
    actionBarTabs.setCustomView(customTabView); 
    actionBarTabs.setDisplayShowCustomEnabled(true);  

    /* Adds fragments to the tabs adapter */ 
    tabsAdapter.addTab(actionBarTabs.newTab().setText("FRAG1"), Fragment_1.class, null); 
    tabsAdapter.addTab(actionBarTabs.newTab().setText("FRAG2"), Fragment_2.class, null); 
    tabsAdapter.addTab(actionBarTabs.newTab().setText("FRAG3"), Fragment_3.class, null); 

} 
} 

片段代碼：

public class Fragment_1 extends SherlockFragment 
{ 
private View view; 
private CustomLayout layout; // Container view layout class instance 
private SlidingTabsActivity slidingTabsActivity; 
private DeviceInfo deviceInfo; 
private Page page; 

@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) 
{ 
    view = inflater.inflate(R.layout.fragment_custom, container, false); 

    return view; 
} 

@Override 
public void onActivityCreated(Bundle savedInstanceState) 
{ 
    super.onActivityCreated(savedInstanceState); 

    /* Creates the new views from the layout class */ 
    slidingTabsActivity = (SlidingTabsActivity) getSherlockActivity(); 
    deviceInfo = slidingTabsActivity.getDeviceInfo(); 
    page = slidingTabsActivity.getPage1(); 

    if(page != null & deviceInfo != null) 
    { 
     layout = new CustomLayout(slidingTabsActivity); 
     layout.setDeviceInfo(deviceInfo); 
     layout.setPage(page); 
     layout.createView(); 

     System.out.println("Page and device info are NOT null!"); 
    } 
    else 
    { 
     System.out.println("Page and device info are null!"); 
    } 

} 

} 

Answer 1

使用接口使用活動回調。回調用於刷新片段。

此鏈接Communication With Fragments會幫助你。