菜单组操作
import android.app.Activity;import android.os.Bundle;import android.view.Menu;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;/** * Class which shows what we can do with group of menu items * * @author FaYnaSoft Labs */public class Main extends Activity {private boolean isRemoved = false;private boolean isEnabled = false;private boolean isVisible = false;private static final int FILE = 0;private static final int EDIT = 1;private static final int VIEW = 2;private static final int NEW_MENU_ITEM = Menu.FIRST;private static final int SAVE_MENU_ITEM = NEW_MENU_ITEM + 1;private static final int CUT_MENU_ITEM = SAVE_MENU_ITEM + 1;private static final int COPY_MENU_ITEM = CUT_MENU_ITEM + 1;private static final int LIST_MENU_ITEM = COPY_MENU_ITEM + 1;private static final int ICON_MENU_ITEM = LIST_MENU_ITEM + 1;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);Button rmBtn = (Button) findViewById(R.id.rmBtn);rmBtn.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {isRemoved = true;}});Button enableBtn = (Button) findViewById(R.id.enableBtn);enableBtn.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {if(isEnabled) {isEnabled = false;} else {isEnabled = true;}}});Button visibleBtn = (Button) findViewById(R.id.visibleBtn);visibleBtn.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {if(isVisible) {isVisible = false;} else {isVisible = true;}}});}@Overridepublic boolean onPrepareOptionsMenu(Menu menu) {menu.clear();menu.add(FILE, NEW_MENU_ITEM, 0, "New");menu.add(FILE, SAVE_MENU_ITEM, 1, "Save");if(isRemoved) {menu.removeGroup(FILE);}menu.add(EDIT, CUT_MENU_ITEM, 2, "Cut");menu.add(EDIT, COPY_MENU_ITEM, 3, "Edit");if(isEnabled) {menu.setGroupEnabled(EDIT, true);} else {menu.setGroupEnabled(EDIT, false);}menu.add(VIEW, LIST_MENU_ITEM, 4, "List");menu.add(VIEW, ICON_MENU_ITEM, 5, "Icons");if(isVisible) {menu.setGroupVisible(VIEW, true);} else {menu.setGroupVisible(VIEW, false);}return super.onCreateOptionsMenu(menu);}} menu.setGroupEnabled(EDIT, true/false);
页:
[1]