的LinearLayout $的LayoutParams不能转换为android.support.v4.widget.DrawerLayout $的LayoutParams [英] LinearLayout$LayoutParams cannot be cast to android.support.v4.widget.DrawerLayout$LayoutParams
问题描述
我想要做的抽屉式导航选项。
下面是我的xml:
< XML版本=1.0编码=UTF-8&GT?;
< android.support.v4.widget.DrawerLayout
的xmlns:机器人=http://schemas.android.com/apk/res/android
机器人:ID =@ + ID / drawer_layout
机器人:layout_width =match_parent
机器人:layout_height =match_parent>
<的LinearLayout
机器人:layout_width =match_parent
机器人:layout_height =WRAP_CONTENT
机器人:方向=垂直>
<按钮
机器人:ID =@ + ID / sendnewmessages
机器人:layout_width =WRAP_CONTENT
机器人:layout_height =30dp
机器人:背景=@可绘制/ nothere
机器人:重力=center_horizontal
机器人:则shadowColor =@机器人:彩色/黑白
机器人:shadowDx =1
机器人:shadowDy =1
机器人:shadowRadius =1
机器人:文=发送新邮件
机器人:textAlignment =中心
机器人:文字颜色=@机器人:彩色/黑白/>
<的EditText
机器人:ID =@ + ID / searchmessage
机器人:layout_height =40dp
机器人:layout_width =200dp
机器人:重力=中心
机器人:提示=搜索信息/>
<的ListView
机器人:ID =@ + ID /列表视图
机器人:layout_width =match_parent
机器人:layout_height =WRAP_CONTENT>
< / ListView控件>
< ListView的机器人:ID =@ + ID / left_drawer
机器人:layout_width =240dp
机器人:layout_height =match_parent
机器人:layout_gravity =开始
机器人:choiceMode =singleChoice
机器人:分隔=@机器人:彩色/透明
机器人:dividerHeight =0dp
机器人:后台=#111/>
< / LinearLayout中>
< /android.support.v4.widget.DrawerLayout>
如果我删除的LinearLayout
没有错误。此按钮出现的背后列表视图
,的EditText
出现在屏幕中央。的问题是,对象未对准。有没有办法在 DrawerLayout
对齐视图对象?
如果我不删除的LinearLayout
我得到这个错误:
的LinearLayout $的LayoutParams不能转换为android.support.v4.widget.DrawerLayout $的LayoutParams
堆栈跟踪:
E / AndroidRuntime(3454):致命异常:主要流程:com.brilliant.bridge,PID:3454 java.lang.ClassCastException: android.widget.LinearLayout $的LayoutParams不能转换到 android.support.v4.widget.DrawerLayout $的LayoutParams在 android.support.v4.widget.DrawerLayout.isDrawerView(DrawerLayout.java:910) 在 android.support.v4.widget.DrawerLayout.isDrawerOpen(DrawerLayout.java:1156) 在 com.brilliant.bridge.AdminMessages.on prepareOptionsMenu(AdminMessages.java:220) 在android.app.Activity.on $ P $在pparePanel(Activity.java:2556) com.android.internal.policy.impl.PhoneWindow。preparePanel(PhoneWindow.java:464) 在 com.android.internal.policy.impl.PhoneWindow.doInvalidatePanelMenu(PhoneWindow.java:800) 在 com.android.internal.policy.impl.PhoneWindow $ 1.运行(PhoneWindow.java:221) 在 android.view.Choreographer $ CallbackRecord.run(Choreographer.java:761) 在android.view.Choreographer.doCallbacks(Choreographer.java:574)在 android.view.Choreographer.doFrame(Choreographer.java:543)在 android.view.Choreographer $ FrameDisplayEventReceiver.run(Choreographer.java:747) 在android.os.Handler.handleCallback(Handler.java:733)在 android.os.Handler.dispatchMessage(Handler.java:95)在 android.os.Looper.loop(Looper.java:136)在 android.app.ActivityThread.main(ActivityThread.java:5017)在 java.lang.reflect.Method.invokeNative(本机方法)在 java.lang.reflect.Method.invoke(Method.java:515)在 com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:779) 在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)在 dalvik.system.NativeStart.main(本机方法)
prepareOptionsMenu(功能菜单)公共布尔{
布尔drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList);
menu.findItem(R.id.action_websearch).setVisible(drawerOpen!);
返回super.on prepareOptionsMenu(菜单);
}
分配一个ID在XML文件中的LinearLayout中:
<的LinearLayout
机器人:ID =@ + ID / DrawerLinear
机器人:layout_width =match_parent
机器人:layout_height =WRAP_CONTENT
机器人:方向=垂直>
<! - 你LISTVIEW IS HERE - >
< / LinearLayout中>
然后,在你的java类,施放此的LinearLayout:
私人的LinearLayout DrawerLinear;
在OnCreate中,你应该这样做:
DrawerLinear =(的LinearLayout)findViewbyid(R.id.DrawerLinear);
而在你的prepareOptionMenu,把这样的:
prepareOptionsMenu(功能菜单)公共布尔{
布尔drawerOpen = mDrawerLayout.isDrawerOpen(DrawerLinear);
menu.findItem(R.id.action_websearch).setVisible(drawerOpen!);
返回super.on prepareOptionsMenu(菜单);
}
它应该解决您的问题。
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);
}
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.
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