java无法在Framelayout内设置Linearlayout参数

Question

我在框架布局中有一个线性布局。我想做的是根据屏幕大小，通过编程在线性布局中添加一些边距

<ScrollView xmlns:安卓="http://schemas.安卓.com/apk/res/安卓"
    安卓:layout_width="match_parent"
    安卓:layout_height="match_parent"
    安卓:fillViewport="true"
    安卓:scrollbars="none">
    <FrameLayout 
        安卓:id="@+id/activity_main"
        安卓:layout_width="match_parent"
        安卓:layout_height="match_parent"
        tools:context="com.example.aba.webcampstest.MainActivity"
        安卓:orientation="vertical">

        <ImageView
            安卓:id="@+id/headerImageView"
            安卓:layout_width="match_parent"
            安卓:layout_height="match_parent"
            安卓:adjustViewBounds="true"
            安卓:layout_marginTop="0dp"
            安卓:scaleType="centerCrop"/>

        <LinearLayout
            安卓:id="@+id/mainContainerLayout"
            安卓:layout_width="match_parent"
            安卓:layout_height="match_parent"
            安卓:orientation="vertical">

         //oher stuffs
       </LinearLayout>
    </FrameLayout >
</ScrollView>

我的activity onCreate方法包含

LinearLayout containerLayout = (LinearLayout) findViewById(R.id.mainContainerLayout);
int marginTopBottom = dpToPx((int)((dpHeight*8)/100),(int)density); //8%
int marginLeftRight = dpToPx((int)((dpWidth*6)/100),(int)density); //6%

LinearLayout.LayoutParams languageContainerLayoutParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.MATCH_PARENT);
languageContainerLayoutParams.setMargins(marginLeftRight,marginTopBottom,marginLeftRight,marginTopBottom);
containerLayout.setLayoutParams(languageContainerLayoutParams);

我在开始活动时出现错误

E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.aba.webcampstest, PID: 11723 java.lang.ClassCastException: 安卓.widget.LinearLayout$LayoutParams cannot be cast to 安卓.widget.FrameLayout$LayoutParams at 安卓.widget.FrameLayout.onMeasure(FrameLayout.java:311) at 安卓.view.View.measure(View.java:17495) at 安卓.widget.ScrollView.measureChildWithMargins(ScrollView.java:1779) at 安卓.widget.FrameLayout.onMeasure(FrameLayout.java:310) at 安卓.widget.ScrollView.onMeasure(ScrollView.java:476) at 安卓.view.View.measure(View.java:17495) at 安卓.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5363) at 安卓.widget.FrameLayout.onMeasure(FrameLayout.java:310) at 安卓.view.View.measure(View.java:17495) at 安卓.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5363) at 安卓.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1410) at 安卓.widget.LinearLayout.measureVertical(LinearLayout.java:695) at 安卓.widget.LinearLayout.onMeasure(LinearLayout.java:588) at 安卓.view.View.measure(View.java:17495) at 安卓.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5363) at 安卓.widget.FrameLayout.onMeasure(FrameLayout.java:310) at com.安卓.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2548) at 安卓.view.View.measure(View.java:17495) at 安卓.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2285) at 安卓.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1396) at 安卓.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1595) at 安卓.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1254) at 安卓.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6637) at 安卓.view.Choreographer$CallbackRecord.run(Choreographer.java:814) at 安卓.view.Choreographer.doCallbacks(Choreographer.java:614) at 安卓.view.Choreographer.doFrame(Choreographer.java:584) at 安卓.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:800) at 安卓.os.Handler.handleCallback(Handler.java:733) at 安卓.os.Handler.dispatchMessage(Handler.java:95) at 安卓.os.Looper.loop(Looper.java:146) at 安卓.app.ActivityThread.main(ActivityThread.java:5602) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:515) at com.安卓.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283) at com.安卓.internal.os.ZygoteInit.main(ZygoteInit.java:1099) at dalvik.system.NativeStart.main(Native Method)

有什么问题吗