菜单的简单入门
public class WidgetActivity extends Activity { /** Called when the activity is first created. */private final String TAG = "WidgetActivity...";private Menu myMenu; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); } @Override public boolean onCreateOptionsMenu(Menu menu) { // TODO Auto-generated method stub super.onCreateOptionsMenu(menu); myMenu = menu; addRegularMenuItems(menu); addSeconderyMeunItems(menu); return true; } private void addSeconderyMeunItems(Menu menu) {// TODO Auto-generated method stubint base = Menu.CATEGORY_SECONDARY;menu.add(base, base+1, base+1, "sec. item 1");menu.add(base, base+2, base+2, "sec. item 2");menu.add(base, base+3, base+3, "sec. item 3");menu.add(base, base+3, base+3, "sec. item 4");menu.add(base, base+4, base+4, "sec. item 5");}@Override public boolean onOptionsItemSelected(MenuItem item) { // TODO Auto-generated method stub //一下是你的业务逻辑代码 Log.i(TAG, item.getItemId()+ ""); if(item.getItemId() == 1){ appendText("\nHello..."); }else if(item.getItemId() ==2){ appendText("\nitem2"); } else if( item.getItemId() == 3){ emptyText(); }else if( item.getItemId() == 4){ this.appendMenuItemText(item); this.myMenu.setGroupVisible(Menu.CATEGORY_SECONDARY, false); } else if(item.getItemId() == 5){ this.appendMenuItemText(item); this.myMenu.setGroupVisible(Menu.CATEGORY_SECONDARY, true); } else if( item.getItemId()==6){ this.appendMenuItemText(item); this.myMenu.setGroupEnabled(Menu.CATEGORY_SECONDARY, true); }else if(item.getItemId() == 7){ this.appendMenuItemText(item); this.myMenu.setGroupEnabled(Menu.CATEGORY_SECONDARY, false); }else if(item.getItemId() == 8 ){ this.appendMenuItemText(item); this.myMenu.setGroupCheckable(Menu.CATEGORY_SECONDARY, true, false); }else if(item.getItemId()==9){ this.appendMenuItemText(item); this.myMenu.setGroupCheckable(Menu.CATEGORY_SECONDARY, false, false); } else this.appendMenuItemText(item); return super.onOptionsItemSelected(item); } private void emptyText() {// TODO Auto-generated method stub TextView tv = (TextView) findViewById(R.id.textView); tv.setText("");}private void appendMenuItemText(MenuItem item) {// TODO Auto-generated method stubString title = item.getTitle().toString();TextView textView = (TextView) findViewById(R.id.textView);textView.setText(textView.getText() + "\n" + title);}private void appendText(String string) {// TODO Auto-generated method stubTextView tv = (TextView) findViewById(R.id.textView);tv.setText(tv.getText() + string);}private void addRegularMenuItems(Menu menu){ int base = Menu.FIRST; menu.add(base, base, base, "append"); menu.add(base, base+1, base+1, "item2"); menu.add(base, base + 2, base + 2, "clear"); menu.add(base,base+3,base+3,"hide secondery"); menu.add(base, base+4, base+4, "show secomdery"); menu.add(base, base+5, base+5, "enable scondery"); menu.add(base, base+6, base+6, "disable secondery"); menu.add(base, base+7, base+7, "check secondery"); menu.add(base, base+8, base+8, "uncheck secondery"); }}?