CODEWITHSUNDEEP
androidgrid-layoutandroid-2.3-gingerbread
artem
artem

Reputation: 16767

GridLayout android.view.ViewGroup$LayoutParams cannot be cast to android.support.v7.widget.GridLayout$LayoutParams

I have GridLayout as child view, with set (empty) GridLayout.LayoutParams

setLayoutParams(new GridLayout.LayoutParams());

I do not set LayoutParams to this anywhere else. But I'm getting exception

E/AndroidRuntime( 1620): FATAL EXCEPTION: main
E/AndroidRuntime( 1620): java.lang.ClassCastException: android.view.ViewGroup$LayoutParams cannot be cast to android.support.v7.widget.GridLayout$LayoutParams
E/AndroidRuntime( 1620):    at android.support.v7.widget.GridLayout.computeLayoutParamsHashCode(GridLayout.java:872)
E/AndroidRuntime( 1620):    at android.support.v7.widget.GridLayout.checkForLayoutParamsModification(GridLayout.java:879)
E/AndroidRuntime( 1620):    at android.support.v7.widget.GridLayout.onMeasure(GridLayout.java:927)
E/AndroidRuntime( 1620):    at android.view.View.measure(View.java:15172)
E/AndroidRuntime( 1620):    at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1249)
E/AndroidRuntime( 1620):    at android.view.View.measure(View.java:15172)
E/AndroidRuntime( 1620):    at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4814)
E/AndroidRuntime( 1620):    at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1390)
E/AndroidRuntime( 1620):    at android.widget.LinearLayout.measureVertical(LinearLayout.java:681)
E/AndroidRuntime( 1620):    at android.widget.LinearLayout.onMeasure(LinearLayout.java:574)
E/AndroidRuntime( 1620):    at android.view.View.measure(View.java:15172)
E/AndroidRuntime( 1620):    at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4814)
E/AndroidRuntime( 1620):    at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
E/AndroidRuntime( 1620):    at android.view.View.measure(View.java:15172)
E/AndroidRuntime( 1620):    at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4814)
E/AndroidRuntime( 1620):    at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1390)
E/AndroidRuntime( 1620):    at android.widget.LinearLayout.measureVertical(LinearLayout.java:681)
E/AndroidRuntime( 1620):    at android.widget.LinearLayout.onMeasure(LinearLayout.java:574)
E/AndroidRuntime( 1620):    at android.view.View.measure(View.java:15172)
E/AndroidRuntime( 1620):    at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4814)
E/AndroidRuntime( 1620):    at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
E/AndroidRuntime( 1620):    at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2148)
E/AndroidRuntime( 1620):    at android.view.View.measure(View.java:15172)
E/AndroidRuntime( 1620):    at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1848)
E/AndroidRuntime( 1620):    at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1100)
E/AndroidRuntime( 1620):    at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1273)
E/AndroidRuntime( 1620):    at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:998)
E/AndroidRuntime( 1620):    at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4212)
E/AndroidRuntime( 1620):    at android.view.Choreographer$CallbackRecord.run(Choreographer.java:725)
E/AndroidRuntime( 1620):    at android.view.Choreographer.doCallbacks(Choreographer.java:555)
E/AndroidRuntime( 1620):    at android.view.Choreographer.doFrame(Choreographer.java:525)
E/AndroidRuntime( 1620):    at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:711)
E/AndroidRuntime( 1620):    at android.os.Handler.handleCallback(Handler.java:615)
E/AndroidRuntime( 1620):    at android.os.Handler.dispatchMessage(Handler.java:92)
E/AndroidRuntime( 1620):    at android.os.Looper.loop(Looper.java:137)
E/AndroidRuntime( 1620):    at android.app.ActivityThread.main(ActivityThread.java:4745)
E/AndroidRuntime( 1620):    at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime( 1620):    at java.lang.reflect.Method.invoke(Method.java:511)
E/AndroidRuntime( 1620):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
E/AndroidRuntime( 1620):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
E/AndroidRuntime( 1620):    at dalvik.system.NativeStart.main(Native Method)
W/ActivityManager(  304):   Force finishing activity com.capsule.launcher/.LauncherActivity

Why?

Upvotes: 2

Views: 3476

Answers (2)

Leszek
Leszek

Reputation: 6598

Which version of Android Api your app uses? Looks like it uses Api 14 or above and You also use android support library. Error described in question is possible when you try to pass GridLayout.LayoutParams() from Api 14 to GridLayout.setLayoutParams from support library. Please, check your imports.

Upvotes: 2

Tim
Tim

Reputation: 35923

Are you passing a GridLayout.LayoutParams to the GridLayout itself? I don't believe that's right.

When you call setLayoutParams, you're providing information to the parent class about how to layout the particular child. You should pass a <ParentClass>.LayoutParams to the GridLayout, where ParentClass is whatever container the GridLayout is in.

GridLayout.LayoutParams is only for setting the layoutParams for the children of a GridLayout.

Upvotes: 3

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