I'm trying to do Navigation drawer options. Here is my xml: ``` <ListView andr…

LinearLayout$LayoutParams cannot be cast to android.support.v4.widget.DrawerLayout$LayoutParams

android, navigation-drawer

Solution

Assign an ID to your LinearLayout in xml file:

<LinearLayout
        android:id="@+id/DrawerLinear"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">

        <!-- YOUR LISTVIEW IS HERE -->
</LinearLayout>

Then in you java class, Cast this LinearLayout:

private LinearLayout    DrawerLinear;

In OnCreate you should do this:

DrawerLinear = (LinearLayout) findViewById(R.id.DrawerLinear);

And in your onPrepareOptionMenu, put this:

public boolean onPrepareOptionsMenu(Menu menu) {

    boolean drawerOpen = mDrawerLayout.isDrawerOpen(DrawerLinear);
    menu.findItem(R.id.action_websearch).setVisible(!drawerOpen);
    return super.onPrepareOptionsMenu(menu);
}

it should solve your problem.

Problem

I'm trying to do Navigation drawer options. Here is my xml: ``` <?xml version="1.0" encoding="utf-8"?> <android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/drawer_layout" android:layout_width="match_parent" android:layout_height="match_parent"> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical"> <Button android:id="@+id/sendnewmessages" android:layout_width="wrap_content" android:layout_height="30dp" android:background="@drawable/nothere" android:gravity="center_horizontal" android:shadowColor="@android:color/black" android:shadowDx="1" android:shadowDy="1" android:shadowRadius="1" android:text="Send New Messages" android:textAlignment="center" android:textColor="@android:color/black" /> <EditText android:id="@+id/searchmessage" android:layout_height="40dp" android:layout_width="200dp" android:gravity="center" android:hint="Search Messages"/> <ListView android:id="@+id/listview" android:layout_width="match_parent" android:layout_height="wrap_content"> </ListView> <ListView android:id="@+id/left_drawer" android:layout_width="240dp" android:layout_height="match_parent" android:layout_gravity="start" android:choiceMode="singleChoice" android:divider="@android:color/transparent" android:dividerHeight="0dp" android:background="#111"/> </LinearLayout> </android.support.v4.widget.DrawerLayout> ``` If I remove `Linearlayout` there is no error. This button appears behind `listview`, `edittext` appears in the middle of screen. The problem is that the objects are not aligned. Is there a way align view objects in `DrawerLayout`? If I don't remove `linearlayout` I get this error: ``` LinearLayout$LayoutParams cannot be cast to android.support.v4.widget.DrawerLayout$LayoutParams ``` stacktrace: E/AndroidRuntime(3454): FATAL EXCEPTION: main Process: com.brilliant.bridge, PID: 3454 java.lang.ClassCastException: android.widget.LinearLayout$LayoutParams cannot be cast to android.support.v4.widget.DrawerLayout$LayoutParams at android.support.v4.widget.DrawerLayout.isDrawerView(DrawerLayout.java:910) at android.support.v4.widget.DrawerLayout.isDrawerOpen(DrawerLayout.java:1156) at com.brilliant.bridge.AdminMessages.onPrepareOptionsMenu(AdminMessages.java:220) at android.app.Activity.onPreparePanel(Activity.java:2556) at com.android.internal.policy.impl.PhoneWindow.preparePanel(PhoneWindow.java:464) at com.android.internal.policy.impl.PhoneWindow.doInvalidatePanelMenu(PhoneWindow.java:800) at com.android.internal.policy.impl.PhoneWindow$1.run(PhoneWindow.java:221) at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761) at android.view.Choreographer.doCallbacks(Choreographer.java:574) at android.view.Choreographer.doFrame(Choreographer.java:543) at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747) at android.os.Handler.handleCallback(Handler.java:733) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:136) at android.app.ActivityThread.main(ActivityThread.java:5017) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:515) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595) at dalvik.system.NativeStart.main(Native Method) ``` public boolean onPrepareOptionsMenu(Menu menu) { boolean drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList); menu.findItem(R.id.action_websearch).setVisible(!drawerOpen); return super.onPrepareOptionsMenu(menu); } ```

Original source