java.lang.ClassCastException: android.view.ViewGroup$LayoutParams cannot be cast to android.widget.RelativeLayout$LayoutParams
28,353
Solution 1
In your code you are importing import android.widget.RelativeLayout.LayoutParams;
instead of android.view.ViewGroup.LayoutParams
so Delete import android.widget.RelativeLayout.LayoutParams;
and Add import android.view.ViewGroup.LayoutParams
Solution 2
You should make the LayoutParams object of the parent layout. Example in the layout below to set height and width of the LinearLayout you have to make the LayoutParmas of RelativeLayout not LinearLayout itself.
<?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:
//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
Author by
bukanamay
Updated on August 30, 2022Comments
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bukanamay over 1 year
I've just edited my XML, I've put slide menu code in my XML, but there is an error.
<?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:
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)
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IgorGanapolsky over 10 yearsWhy would ViewGroup.LayoutParams make a difference?
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kalyan pvs about 10 years@IgorGanapolsky because LayoutParams is a inner class of particular classes..RelativeLayout extend ViewGroup so you can typecast but RelativeLayout.LayoutParams can not extend ViewGroup.LayoutParams so it will throw ClassCastException
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AppiDevo about 8 yearsAnd that is great answer.