English 中文(简体)
旋转android设备时如何保持菜单项组打开
原标题:How do I keep a menu item group open when rotating android device

我已经在android清单中处理了屏幕旋转配置的更改,它适用于对话框主题的活动,但对于这些菜单组,它们在选择菜单项后打开(在onOptionsItemSelected中),当我旋转屏幕时仍然关闭。我可以在onConfigurationChanged中处理这些吗?或者有更好的方法吗?我已经附上了打开子菜单的代码。

@Override
public boolean onOptionsItemSelected(MenuItem item) {
   if (item.getGroupId() == R.id.submenu) {
      if (item.getItemId() == this.submenu) {
         return true;
      }
      this.value = item.getItemId();
      item.setChecked(true);
      //do something with value
      return true;
   }
   //...
   return super.onOptionsItemSelected(item);
}
最佳回答

这最终是一个非常简单的解决方案。我需要在AndroidManifest中的活动中添加android:configChanges=“orientation”行。

问题回答

您需要覆盖

    @Override
 public void onConfigurationChanged(Configuration newConfig) {
    // TODO Auto-generated method stub
    super.onConfigurationChanged(newConfig);
 }

但要做到这一点,您必须通过在“活动”级别的清单文件中添加标记来指定将自己处理的配置更改

     android:configChanges=["mcc", "mnc", "locale",
                             "touchscreen", "keyboard", "keyboardHidden",
                             "navigation", "orientation", "screenLayout",
                             "fontScale", "uiMode"]

on onConfigurationChanged保存状态并在onResume上重新加载





相关问题
Android - ListView fling gesture triggers context menu

I m relatively new to Android development. I m developing an app with a ListView. I ve followed the info in #1338475 and have my app recognizing the fling gesture, but after the gesture is complete, ...

AsyncTask and error handling on Android

I m converting my code from using Handler to AsyncTask. The latter is great at what it does - asynchronous updates and handling of results in the main UI thread. What s unclear to me is how to handle ...

Android intent filter for a particular file extension?

I want to be able to download a file with a particular extension from the net, and have it passed to my application to deal with it, but I haven t been able to figure out the intent filter. The ...

Android & Web: What is the equivalent style for the web?

I am quite impressed by the workflow I follow when developing Android applications: Define a layout in an xml file and then write all the code in a code-behind style. Is there an equivalent style for ...

TiledLayer equivalent in Android [duplicate]

To draw landscapes, backgrounds with patterns etc, we used TiledLayer in J2ME. Is there an android counterpart for that. Does android provide an option to set such tiled patterns in the layout XML?

Using Repo with Msysgit

When following the Android Open Source Project instructions on installing repo for use with Git, after running the repo init command, I run into this error: /c/Users/Andrew Rabon/bin/repo: line ...

Android "single top" launch mode and onNewIntent method

I read in the Android documentation that by setting my Activity s launchMode property to singleTop OR by adding the FLAG_ACTIVITY_SINGLE_TOP flag to my Intent, that calling startActivity(intent) would ...

From Web Development to Android Development

I have pretty good skills in PHP , Mysql and Javascript for a junior developer. If I wanted to try my hand as Android Development do you think I might find it tough ? Also what new languages would I ...

热门标签