[英]java.lang.ClassCastException: android.view.ViewGroup$LayoutParams cannot be cast to android.widget.RelativeLayout$LayoutParams
I've just edited my XML, I've put slide menu code in my XML, but there is an error.我刚刚编辑了我的 XML,我在 XML 中放入了幻灯片菜单代码,但出现了错误。
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#ffffff" >
<ListView
android:id="@+id/menu_content_menulist"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="8dp"
android:cacheColorHint="@android:color/transparent"
android:divider="@null"
android:listSelector="@null"/>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.mozaik.tangsel.side_menu_scroll.ScrollerLinearLayout
android:id="@+id/menu_content_side_slide_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="verti_
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="@+id/content_statis"
android:orientation="vertical"
android:background="@drawable/bg_app"
>
<include layout="@layout/layout_action_bar" />
<ScrollView
android:id="@+id/SV"
android:layout_width="fill_parent"
android:layout_height="match_parent"
android:fillViewport="true"
>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="4dp"
android:background="@drawable/inbox_interface"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<ImageView
android:id="@+id/ImageMozaikTangsel"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_margin="10dip" />
</LinearLayout>
<LinearLayout
android:id="@+id/tabMozaikTangselLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
</LinearLayout>
</LinearLayout>
</LinearLayout>
</ScrollView>
</LinearLayout>
</com.mozaik.tangsel.side_menu_scroll.ScrollerLinearLayout>
</RelativeLayout>
</RelativeLayout>
Error in logcat: logcat 中的错误:
10-26 15:53:32.126: E/AndroidRuntime(10869): FATAL EXCEPTION: main
10-26 15:53:32.126: E/AndroidRuntime(10869): java.lang.ClassCastException: android.view.ViewGroup$LayoutParams cannot be cast to android.widget.RelativeLayout$LayoutParams
10-26 15:53:32.126: E/AndroidRuntime(10869): at android.widget.RelativeLayout$DependencyGraph.findRoots(RelativeLayout.java:1352)
10-26 15:53:32.126: E/AndroidRuntime(10869): at android.widget.RelativeLayout$DependencyGraph.getSortedViews(RelativeLayout.java:1299)
10-26 15:53:32.126: E/AndroidRuntime(10869): at android.widget.RelativeLayout.sortChildren(RelativeLayout.java:316)
10-26 15:53:32.126: E/AndroidRuntime(10869): at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:337)
10-26 15:53:32.126: E/AndroidRuntime(10869): at android.view.View.measure(View.java:15193)
10-26 15:53:32.126: E/AndroidRuntime(10869): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4816)
10-26 15:53:32.126: E/AndroidRuntime(10869): at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
10-26 15:53:32.126: E/AndroidRuntime(10869): at android.view.View.measure(View.java:15193)
10-26 15:53:32.126: E/AndroidRuntime(10869): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4816)
10-26 15:53:32.126: E/AndroidRuntime(10869): at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1390)
10-26 15:53:32.126: E/AndroidRuntime(10869): at android.widget.LinearLayout.measureVertical(LinearLayout.java:681)
10-26 15:53:32.126: E/AndroidRuntime(10869): at android.widget.LinearLayout.onMeasure(LinearLayout.java:574)
10-26 15:53:32.126: E/AndroidRuntime(10869): at android.view.View.measure(View.java:15193)
10-26 15:53:32.126: E/AndroidRuntime(10869): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4816)
10-26 15:53:32.126: E/AndroidRuntime(10869): at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
10-26 15:53:32.126: E/AndroidRuntime(10869): at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2217)
10-26 15:53:32.126: E/AndroidRuntime(10869): at android.view.View.measure(View.java:15193)
10-26 15:53:32.126: E/AndroidRuntime(10869): at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1850)
10-26 15:53:32.126: E/AndroidRuntime(10869): at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1102)
10-26 15:53:32.126: E/AndroidRuntime(10869): at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1275)
10-26 15:53:32.126: E/AndroidRuntime(10869): at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1000)
10-26 15:53:32.126: E/AndroidRuntime(10869): at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4216)
10-26 15:53:32.126: E/AndroidRuntime(10869): at android.view.Choreographer$CallbackRecord.run(Choreographer.java:725)
10-26 15:53:32.126: E/AndroidRuntime(10869): at android.view.Choreographer.doCallbacks(Choreographer.java:555)
10-26 15:53:32.126: E/AndroidRuntime(10869): at android.view.Choreographer.doFrame(Choreographer.java:525)
10-26 15:53:32.126: E/AndroidRuntime(10869): at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:711)
10-26 15:53:32.126: E/AndroidRuntime(10869): at android.os.Handler.handleCallback(Handler.java:615)
10-26 15:53:32.126: E/AndroidRuntime(10869): at android.os.Handler.dispatchMessage(Handler.java:92)
10-26 15:53:32.126: E/AndroidRuntime(10869): at android.os.Looper.loop(Looper.java:137)
10-26 15:53:32.126: E/AndroidRuntime(10869): at android.app.ActivityThread.main(ActivityThread.java:4794)
10-26 15:53:32.126: E/AndroidRuntime(10869): at java.lang.reflect.Method.invokeNative(Native Method)
10-26 15:53:32.126: E/AndroidRuntime(10869): at java.lang.reflect.Method.invoke(Method.java:511)
10-26 15:53:32.126: E/AndroidRuntime(10869): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
10-26 15:53:32.126: E/AndroidRuntime(10869): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:556)
10-26 15:53:32.126: E/AndroidRuntime(10869): at dalvik.system.NativeStart.main(Native Method)
In your code you are importing import android.widget.RelativeLayout.LayoutParams;
在您的代码中,您导入
import android.widget.RelativeLayout.LayoutParams;
instead of android.view.ViewGroup.LayoutParams
而不是
android.view.ViewGroup.LayoutParams
so Delete import android.widget.RelativeLayout.LayoutParams;
所以删除
import android.widget.RelativeLayout.LayoutParams;
and Add import android.view.ViewGroup.LayoutParams
并添加
import android.view.ViewGroup.LayoutParams
You should make the LayoutParams object of the parent layout. 您应该创建父布局的LayoutParams对象。 Example in the layout below to set height and width of the LinearLayout you have to make the LayoutParmas of RelativeLayout not LinearLayout itself.
在下面的布局中设置LinearLayout的高度和宽度的示例,您必须使RelativeLayout的LayoutParmas本身不是LinearLayout。
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".newsblog.NewsDetailsActivity"
>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</RelativeLayout>
Java: Java的:
//IN ACTIVITY
RelativeLayout.LayoutParams params=new RelativeLayout.LayoutParams(30,30); //Parent Params
linearLayout.setLayoutParmas(params); //Child Layout
//If you want to set the params of the Relative Layout above. It seems it doesn't have any parent but it has a parent created by android framework which is a frame layout. So
FrameLayout.LayoutParmas params=new FrameLayout.LayoutParmas(30, 30);//FrameLayout is a parentcreated by anroid frame work
relativeLayout.setLayoutParmas(params); ////Here Relative layout is child
只需单击Cnt + o即可删除不需要的导入
Use code below: 使用以下代码:
imageView.setLayoutParams(
new android.widget.RelativeLayout.LayoutParams(
ViewPager.LayoutParams.MATCH_PARENT,
ViewPager.LayoutParams.MATCH_PARENT));
Do let me know if you face any error. 如果您遇到任何错误,请告诉我。
** **
To Set RecyclerView Margin Programatically In Android
在 Android 中以编程方式设置 RecyclerView 边距
** **
MarginLayoutParams mp = (MarginLayoutParams) myRecyclerView.getLayoutParams();
mp.setMarginStart(0);
mp.setMarginEnd(0);
//mp.setMargins(10,10,10,10);
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