显示所有图层菜单

// 菜单-----------------------------------------------------------

	public boolean onCreateOptionsMenu(Menu menu) {
		menu.add(0, Menu.FIRST + 1, 0, "显示所有图层").setIcon(
				android.R.drawable.ic_menu_mapmode);
		// menu.add(0, Menu.FIRST + 2, 1, "图层管理").setIcon(
		// android.R.drawable.ic_menu_manage);
		return super.onCreateOptionsMenu(menu);
	}

	public boolean onOptionsItemSelected(MenuItem item) {
		switch (item.getItemId()) {
		case Menu.FIRST + 1:
			// 显示所有图层
		{
			int c = mapWnd.GetMap().GetLayerCount();
			// 通过循环得到所有的图层
			for (short i = 0; i < c; i++) {
				// 根据图层名称显示对应图层
				showBigClassLayer(mapWnd.GetMap().GetLayerAt(i).GetName());
			}
		}
			break;
		case Menu.FIRST + 2: {
			// 图层管理
			int c = mapWnd.GetMap().GetLayerCount();
			String[] name = new String[c];
			boolean[] selectable = new boolean[c];
			// 通过循环得到所有的图层
			for (short i = 0; i < c; i++) {
				name[i] = mapWnd.GetMap().GetLayerAt(i).GetName();
				showBigClassLayer(name[i]);
				selectable[i] = mapWnd.GetMap().GetLayerAt(i).IsSelectable();
			}
			Intent intent = new Intent();
			intent.setClass(MapBuJiSelectView.this, LayerManager.class);
			Bundle bundle = new Bundle();
			bundle.putSerializable("layername", name);
			bundle.putSerializable("selectable", selectable);
			intent.putExtras(bundle);
			// startActivity(intent);
		}
			break;

		default:

		}
		return super.onOptionsItemSelected(item);
	}