SwitchCompat在actionbar中,带有片段

Question

尝试将SwitchCompat设置为操作栏时出错.

这是我的abswitch.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/abswitch"
    android:layout_width="fill_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal" >

    <android.support.v7.widget.SwitchCompat
        android:id="@+id/switchForActionBar"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerVertical="true"
        android:text="" />

</RelativeLayout>

这是我的profile_menu.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">
    <item
        android:id="@+id/myswitch"
        android:title=""
        app:showAsAction="always"
        android:actionLayout="@layout/abswitch"/>
</menu>

在这里onCreateOptionsMenu来自片段

@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
    inflater.inflate(R.menu.profile_menu, menu);
    MenuItem item = menu.findItem(R.id.myswitch);
    item.setActionView(R.layout.abswitch);
    SwitchCompat switchCompat = (SwitchCompat) item.getActionView();
    super.onCreateOptionsMenu(menu, inflater);
}

这是每次我尝试启动我的应用程序时得到的错误

Process: ru.dennes544.vkapp, PID: 15974
java.lang.ClassCastException: android.widget.RelativeLayout cannot be cast to android.support.v7.widget.SwitchCompat
        at ru.dennes544.vkapp.Profile.onCreateOptionsMenu(Profile.java:216)
        at android.support.v4.app.Fragment.performCreateOptionsMenu(Fragment.java:1868)
        at android.support.v4.app.FragmentManagerImpl.dispatchCreateOptionsMenu(FragmentManager.java:1989)
        at android.support.v4.app.FragmentActivity.onCreatePanelMenu(FragmentActivity.java:276)
        at android.support.v7.app.ActionBarActivity.superOnCreatePanelMenu(ActionBarActivity.java:276)
        at android.support.v7.app.ActionBarActivityDelegate$1.onCreatePanelMenu(ActionBarActivityDelegate.java:79)
        at android.support.v7.widget.WindowCallbackWrapper.onCreatePanelMenu(WindowCallbackWrapper.java:49)
        at android.support.v7.internal.app.ToolbarActionBar.populateOptionsMenu(ToolbarActionBar.java:459)
        at android.support.v7.internal.app.ToolbarActionBar$1.run(ToolbarActionBar.java:69)
        at android.os.Handler.handleCallback(Handler.java:739)
        at android.os.Handler.dispatchMessage(Handler.java:95)
        at android.os.Looper.loop(Looper.java:135)
        at android.app.ActivityThread.main(ActivityThread.java:5221)
        at java.lang.reflect.Method.invoke(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:372)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)

提前致谢.

PS抱歉对于pastebin链接,stackoverflow没有正确格式化xml的

编辑:想通了.

在profile_menu.xml中更改

<item
    android:id="@+id/toggleservice"
    app:actionViewClass="android.support.v7.widget.SwitchCompat"
    app:showAsAction="always"
    android:title=""/>

在Profile.class中

@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
    inflater.inflate(R.menu.profile_menu, menu);
    MenuItem item = menu.findItem(R.id.toggleservice);
    SwitchCompat switchCompat = (SwitchCompat) MenuItemCompat.getActionView(item);
    super.onCreateOptionsMenu(menu, inflater);
}

现在它的工作.谢谢大家!

Answer 1

代替：

SwitchCompat switchCompat = (SwitchCompat) MenuItemCompat.getActionView(item);

你应该做：

RelativeLayout relativeLayout= (RelativeLayout) MenuItemCompat.getActionView(item);
SwitchCompat switchCompat = (SwitchCompat) relativeLayout.findViewById(R.id.switchForActionBar);

或者