如何更改自定義選項卡的圖像，當收到一些通知

Question

我有一個自定義選項卡，我在後臺運行一個服務，在1分鐘後打一個web服務，並從web.Now獲取一些數據。現在我想當收到數據時，第一個選項卡圖像被更改。 請help.Thanks提前。

我的代碼

public class MainTabActivity extends TabActivity { 

public static TabHost mTabHost; 
public static TextView offLineText; 

private void setupTabHost() { 
    mTabHost = (TabHost) findViewById(android.R.id.tabhost);    
    mTabHost.setup(); 
} 

/** Called when the activity is first created. */ 
@Override 
public void onCreate(Bundle savedInstanceState) { 
    requestWindowFeature(Window.FEATURE_NO_TITLE);   
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.tab_test); 
    offLineText=(TextView)findViewById(R.id.offlinetext); 
    setupTabHost(); 
    mTabHost.getTabWidget().setDividerDrawable(R.drawable.tab_divider); 
    setupTab(new TextView(this), "New Order!","NewOrderActivity.class",R.drawable.neworder); 
    setupTab(new TextView(this), "Viewed Orders","ViewedOrderActivity.class",R.drawable.viewd); 
    setupTab(new TextView(this), "Settings", "SettingActivity.class",R.drawable.setting); 
    setupTab(new TextView(this), "Dashboard","DashboardActivity.class",R.drawable.view);  

} 

private void setupTab(final View view, final String tag, final String className, int neworder) { 
    View tabview = createTabView(mTabHost.getContext(), tag, mTabHost.getContext().getResources().getDrawable(neworder)); 

    Intent intent; 
    intent = new Intent().setClass(this, NewOrderActivity.class); 
    if (className.equals("NewOrderActivity.class")) { 
     intent = new Intent().setClass(this, NewOrderActivity.class);} 
    if (className.equals("ViewedOrderActivity.class")) { 
     intent = new Intent().setClass(this, ViewedOrderActivity.class);}  
    if (className.equals("SettingActivity.class")) { 
     intent = new Intent().setClass(this, SettingActivity.class);} 
    if (className.equals("DashboardActivity.class")) { 

     intent = new Intent().setClass(this, DashboardActivity.class); 
     } 

    TabSpec setContent = mTabHost.newTabSpec(tag).setIndicator(tabview).setContent(intent); { 
    }; 
    mTabHost.addTab(setContent); 
} 

private static View createTabView(final Context context, final String text,final Drawable drawable) { 

    View view = LayoutInflater.from(context).inflate(R.layout.tabs_bg, null); 
    TextView tv = (TextView) view.findViewById(R.id.tabsText); 
    tv.setText(text); 
    ImageView imageview=(ImageView) view.findViewById(R.id.imgTab);     
    imageview.setImageDrawable(drawable); 

    return view;   

} 

}

Answer 1

你嘗試使用Handler？ http://developer.android.com/reference/android/os/Handler.html