导航抽屉不会保留所选项目

时间:2016-01-04 04:45:24

标签: android navigation-drawer

当我点击一个不同组(特殊)的项目时,在NavigationDrawer中保留所选项目时遇到问题。

    ...
    <item
        android:id="@+id/item_notifications"
        android:icon="@drawable/ic_notifications_black_24dp"
        android:title="@string/drawer_notification"
        android:visible="true" />
</group>
<group android:id="@+id/special">
    <item
        android:id="@+id/item_settings"
        android:icon="@drawable/ic_settings_48dp"
        android:title="@string/drawer_settings" />
    <item
        android:id="@+id/item_feedback"
        android:icon="@drawable/ic_chat_bubble_black_24dp"
        android:title="@string/drawer_feedback" />

    <item
        android:id="@+id/item_logout"
        android:icon="@drawable/ic_arrow_back_black_24dp"
        android:title="@string/drawer_logout" />

</group>

这是我的MainActivity中的切换案例:

@Override public boolean onNavigationItemSelected(MenuItem menuItem) {
menuItem.setChecked(true);

switch (menuItem.getItemId()) {
case R.id.item_notifications:
    mCurrentSelectedPosition = 6;
    getSupportFragmentManager().beginTransaction()
        .replace(R.id.container, BaseFragment.newInstance("Notifications"))
        .commit();
    mDrawerLayout.closeDrawers();
    return true;

  case R.id.item_settings:
    mCurrentSelectedPosition = 7;
    mDrawerLayout.closeDrawers();
    Snackbar.make(findViewById(R.id.container), "Settings", Snackbar.LENGTH_SHORT).show();
    return true;

  case R.id.item_feedback:
    mCurrentSelectedPosition = 8;
    mDrawerLayout.closeDrawers();
    getSupportFragmentManager().beginTransaction()
            .replace(R.id.container, FeedbackFragment.getInstance())
            .commit();
    return true;

  case R.id.item_logout:
    mDrawerLayout.closeDrawers();
    session.logoutUser(MainActivity.this);
    return true;
  }
}

我的代码没有任何问题。只是当我点击抽屉中的另一个组时,navigationDrawer不会保留我选择的项目。

1 个答案:

答案 0 :(得分:1)

您需要在菜单组中添加以下行:

  

机器人:checkableBehavior =&#34;单&#34;

将帮助您保留所选状态。

<group android:id="@+id/special" 
       android:checkableBehavior="single">
    <item
        android:id="@+id/item_settings"
        android:icon="@drawable/ic_settings_48dp"
        android:title="@string/drawer_settings" />
    <item
        android:id="@+id/item_feedback"
        android:icon="@drawable/ic_chat_bubble_black_24dp"
        android:title="@string/drawer_feedback" />

    <item
        android:id="@+id/item_logout"
        android:icon="@drawable/ic_arrow_back_black_24dp"
        android:title="@string/drawer_logout" />

</group>

查看此official blog post以获取更多参考资料......

希望它会有所帮助。