如何更改tabactivity從tabactivity啓動的活動選項卡？或改變當前標籤

Question

public class HMITabActivity extends TabActivity{ 
@Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     final TabHost tabHost = getTabHost(); 
     tabHost.addTab(tabHost.newTabSpec("Tasks") 
       .setIndicator("Tasks", getResources().getDrawable(R.drawable.program)) 
       .setContent(new Intent(this, Tasks.class))); 

     tabHost.addTab(tabHost.newTabSpec("HMI") 
       .setIndicator("HMI") 
       .setContent(new Intent(this, HMI.class))); 
     tabHost.addTab(tabHost.newTabSpec("Diagnostics") 
       .setIndicator("Diagnostics", getResources().getDrawable(R.drawable.diagnostics)) 
       .setContent(new Intent(this, Diagnostics.class))); 
     tabHost.addTab(tabHost.newTabSpec("About") 
       .setIndicator("About") 
       .setContent(new Intent(this, Tasks.class).addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP))); 
     //WifiManager wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE); 
     //Method[] wmMethods = wifiManager.getClass().getDeclaredMethods(); 


    } 

}

如何於當前標籤從任何這些子活動的改變（例如：診斷活性）.... ??

Answer 1

從子活動：

((TabActivity) getParent()).getTabHost().setCurrentTab(2)