java.lang.ClassCastException: android.view.ViewGroup$LayoutParams without LayoutParams usage

Question

I use a view which has RelativeLayout -> ScrollView -> LinearLayout. I get exception:

11-22 11:17:24.605: ERROR/AndroidRuntime(5161): FATAL EXCEPTION: main
11-22 11:17:24.605: ERROR/AndroidRuntime(5161): java.lang.ClassCastException: android.view.ViewGroup$LayoutParams
11-22 11:17:24.605: ERROR/AndroidRuntime(5161):     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3131)
11-22 11:17:24.605: ERROR/AndroidRuntime(5161):     at android.widget.FrameLayout.onMeasure(FrameLayout.java:245)
11-22 11:17:24.605: ERROR/AndroidRuntime(5161):     at android.view.View.measure(View.java:8172)
11-22 11:17:24.605: ERROR/AndroidRuntime(5161):     at android.view.ViewRoot.performTraversals(ViewRoot.java:805)
11-22 11:17:24.605: ERROR/AndroidRuntime(5161):     at android.view.ViewRoot.handleMessage(ViewRoot.java:1744)
11-22 11:17:24.605: ERROR/AndroidRuntime(5161):     at android.os.Handler.dispatchMessage(Handler.java:99)
11-22 11:17:24.605: ERROR/AndroidRuntime(5161):     at android.os.Looper.loop(Looper.java:144)
11-22 11:17:24.605: ERROR/AndroidRuntime(5161):     at android.app.ActivityThread.main(ActivityThread.java:4937)
11-22 11:17:24.605: ERROR/AndroidRuntime(5161):     at java.lang.reflect.Method.invokeNative(Native Method)
11-22 11:17:24.605: ERROR/AndroidRuntime(5161):     at java.lang.reflect.Method.invoke(Method.java:521)
11-22 11:17:24.605: ERROR/AndroidRuntime(5161):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
11-22 11:17:24.605: ERROR/AndroidRuntime(5161):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
11-22 11:17:24.605: ERROR/AndroidRuntime(5161):     at dalvik.system.NativeStart.main(Native Method)

Why does it happen only occassionally? Why is there no detail of where the code failed?

Update: I suspect it should fail around this code:

EditText input = new EditText(context);
input.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));

LayoutParams is RelativeLayout.LayoutParams

Well, show us xml and java code. How do you expect us to solve this without them? — Jarno Argillander
– Jarno Argillander, Commented Nov 22, 2011 at 12:23
we don't care what you do suspect :) give us a larger portion of your code — STT LCU
– STT LCU, Commented Nov 22, 2011 at 12:33
added snippet for the code that I believe is causing trouble. — Taranfx
– Taranfx, Commented Nov 22, 2011 at 12:33
see, the point is that if you think that the problem is there you would probably be smart enough to fix that on your own. But the problem might have roots way before in your code. At least, post the whole method where that snippet is. Since you can't fix the problem on your own where you think you found it, it'll be probably elsewhere. — STT LCU
– STT LCU, Commented Nov 22, 2011 at 12:39

Jarno Argillander · Accepted Answer · 2011-11-22 12:47:30Z

45

Use new LinearLayout.LayoutParams(...) instead of new LayoutParams(...)

You always need to use the parent layout's class for the LayoutParams. E.g. if EditText is inside FrameLayout then FrameLayout.LayoutParams must be used.

edited Nov 22, 2011 at 12:47

answered Nov 22, 2011 at 12:37

Jarno Argillander

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Taranfx Over a year ago

Relative > scrollView > LinearLayout > EditText

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