hi can you tell me how to disable a tab in the UI of android code.. (eclair code)
If you mean to disable one tab button on TabWidget, then try this code:
// tabHost = ... (get TabHost)
tabHost.getTabWidget().getChildTabViewAt(your_index).setEnabled(false);
If you want to disable tab widget in overall, then:
// tabWidget = ... (get TabWidget)
tabWidget.setEnabled(false);
Read SDK Help for references: