我试图在导航抽屉中添加垂直线性布局(标题,图像,菜单标题,列表视图和底部的图标).然而,应用程序崩溃显示
'java.lang.ClassCastException: android.widget.LinearLayout$LayoutParams cannot be cast to android.support.v4.widget.DrawerLayout$LayoutParams'
错误.我不确定这是否可能是直接的方式,因为我检查了几个链接,我得到的唯一关闭是this.任何帮助表示赞赏.
提前致谢.
这是我的代码.
<!-- The main context view -->
<FrameLayout
android:id="@+id/content_frame"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<!-- The navigation drawer -->
<LinearLayout
android:layout_width="240dp"
android:layout_height="match_parent"
android:layout_gravity="start"
android:background="#fff"
android:gravity="bottom|center"
android:orientation="vertical"
android:paddingTop="30dp" >
<ListView
android:id="@+id/left_drawer"
android:choiceMode="singleChoice"
android:divider="#E8E8E8"
android:dividerHeight="1dp"
android:footerDividersEnabled="false"
android:headerDividersEnabled="false" />
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:padding="10dp"
android:src="@drawable/footer_image" />
</LinearLayout>
现在的问题是,xml不允许我为listview定义宽度和高度(Element未知),我也无法运行它,因为编译器说“你必须提供layout_width”属性？请帮忙.
我的代码与scrollview.
<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" >
<!-- The main context view -->
<FrameLayout
android:id="@+id/content_frame"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<!-- The navigation drawer -->
<ScrollView
android:id="@+id/leftRL"
android:layout_width="240dp"
android:layout_height="match_parent"
android:layout_gravity="start"
android:layout_marginBottom="5dp"
android:background="#fff" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:paddingLeft="10dp"
android:paddingRight="10dp"
android:paddingTop="10dp" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingBottom="3dp"
android:src="@drawable/ic_launcher"
android:text="Dummy"
android:textColor="#2E3192"
android:textStyle="bold" />
<View
android:layout_width="fill_parent"
android:layout_height="2dip"
android:background="#2E3192" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:paddingTop="2dp" >
<ImageView
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="3"
android:background="#e8e8e8"
android:scaleType="fitXY"
android:src="@drawable/ic_launcher" />
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="7"
android:gravity="center"
android:orientation="vertical"
android:padding="5dp" >
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Dummy name"
android:textSize="15sp" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="dummyemail@imhot.com"
android:textSize="10sp" />
</LinearLayout>
</LinearLayout>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:paddingBottom="3dp"
android:src="@drawable/ic_launcher"
android:text="Dummy item"
android:textColor="#2E3192"
android:textStyle="bold" />
<View
android:layout_width="fill_parent"
android:layout_height="2dip"
android:background="#2E3192" />
</LinearLayout>
<ListView/>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginTop="40dp"
android:padding="10dp"
android:src="@drawable/footer_image" />
</LinearLayout>
</ScrollView>
</android.support.v4.widget.DrawerLayout>
解决方法
如果没有代码,您的查询很难理解. stacktrace,但无论如何……
记住android.support.v4.widget.DrawerLayout只能有3个元素(按照这个顺序)：
>您的主页
>左抽屉
>右抽屉
复制粘贴这个例子(只有前两个元素)&继续你的要求
<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" >
<!-- Your main screen -->
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<RelativeLayout
android:id="@+id/topRL"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#DE6D53"
android:orientation="horizontal" >
<ImageButton
android:id="@+id/left_drawer_button"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:gravity="center_vertical"
android:onClick="onOpenLeftDrawer"
android:src="@drawable/ic_launcher" />
</RelativeLayout>
<FrameLayout
android:id="@+id/frame_to_be_replaced"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="@+id/topRL" />
</RelativeLayout>
<!-- left drawer -->
<RelativeLayout
android:id="@+id/whatYouWantInLeftDrawer"
android:layout_width="290dp"
android:layout_height="match_parent"
android:layout_gravity="start"
android:background="@android:color/black" >
<TextView
android:id="@+id/textView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="title"
android:textColor="@android:color/white" />
<ListView
android:id="@+id/left_expandableListView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="start" />
<TextView
android:layout_width="25dp"
android:layout_height="25dp"
android:layout_alignParentBottom="true"
android:textColor="@android:color/white"
android:text="bottom" />
</RelativeLayout>
</android.support.v4.widget.DrawerLayout>
你的活动：
public class MainActivity extends Activity {
RelativeLayout leftRL;
RelativeLayout rightRL;
DrawerLayout drawerLayout;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// I'm removing the ActionBar.
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.temp);
leftRL = (RelativeLayout)findViewById(R.id.whatYouWantInLeftDrawer);
drawerLayout = (DrawerLayout)findViewById(R.id.drawer_layout);
}
public void onOpenLeftDrawer(View view)
{
drawerLayout.openDrawer(leftRL);
}
}
