旋转 Android 设备时如何保持菜单项组打开

发布于 2024-11-08 21:22:59 字数 557 浏览 2 评论 0原文

我已经在 android 清单中处理了屏幕旋转配置更改，该更改适用于对话框主题活动，但是对于这些菜单组，在选择菜单项（在 onOptionsItemSelected 中）后打开的菜单组在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？我已附上打开子菜单的代码。

@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);
}

原文

I've handled screen rotation config changes in the android manifest, which works for dialog themed activities, however for these menu groups, which open after selecting a menu item (in onOptionsItemSelected) still close when I rotate the screen. Can I handle these in onConfigurationChanged? Or is there a better way? I've attached the code that opens the submenu.

@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);
}

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爱你是孤单的心事 2024-11-15 21:22:59

您将需要重写，

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

但要做到这一点，您必须指定您将通过在 Activity 级别上的清单文件中添加 onConfigurationChanged 上的标记来自行处理的配置更改

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

，保存状态并在 onResume 上重新加载它

you will need to override

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

But to do this you must specify the configuration change you will handle yourself by adding to the manifest file on the Activity level the tag

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

on onConfigurationChanged save the state and reload it on onResume

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