右クリックメニューおよび選択

public class Context extends Activity {
    /** Called when the activity is first created. */
	String checkedItem;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        registerForContextMenu(findViewById(R.id.primaryText));
        registerForContextMenu(findViewById(R.id.secondaryText));
        
        

    }

	@Override
	public void onCreateContextMenu(ContextMenu menu, View v,
			ContextMenuInfo menuInfo) {
		// TODO Auto-generated method stub
		super.onCreateContextMenu(menu, v, menuInfo);
		if (v.getId() == R.id.primaryText) 
			    {
			       menu.setHeaderTitle("Primary context");
			       addMenuItem(menu, "Primary 1", true);
			       addMenuItem(menu, "Primary 2", true);
			       addMenuItem(menu, "Primary 3", false);
			     }
			     else
			     {
			       menu.setHeaderTitle("Secondary context");
			       addMenuItem(menu, "Secondary 1", true);   
			       addMenuItem(menu, "Secondary 2", true);
			       addMenuItem(menu, "Secondary 3", false);
			     }     

	}

	private MenuItem  addMenuItem(ContextMenu menu, String itemName, boolean checkable) {
		MenuItem item = menu.add(itemName);
		     item.setCheckable(checkable);
		
		     if (itemName.equals(checkedItem))
		     {
		       item.setChecked(true);
		    }
		   
		     
		    return item;

		// TODO Auto-generated method stub
		
	}

	@Override
	public boolean onContextItemSelected(MenuItem item) {
		// TODO Auto-generated method stub
		
		
		TextView statusText = (TextView) findViewById(R.id.statusView);
		    
		     if (item.isCheckable() == true)
		     {
		       // Visually display what is checked.
		       checkedItem = item.getTitle().toString();
		     }
		     
		     statusText.setText("Last item " + item.getTitle()); 
		     return true;
		   }
     

	
}