為什么80%的碼農都做不了架構師？>>> ??

錯誤信息:

?java.lang.ClassCastException: android.widget.LinearLayout$LayoutParams cannot be cast to android.widget.RelativeLayout$LayoutParams
??? ?at android.widget.RelativeLayout$DependencyGraph.findRoots(RelativeLayout.java:1317)
??? ?at android.widget.RelativeLayout$DependencyGraph.getSortedViews(RelativeLayout.java:1264)
??? ?at android.widget.RelativeLayout.sortChildren(RelativeLayout.java:292)
??? ?at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:314)
??? ?at android.view.View.measure(View.java:12728)
??? ?at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4698)
??? ?at android.widget.FrameLayout.onMeasure(FrameLayout.java:293)
??? ?at android.view.View.measure(View.java:12728)
??? ?at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4698)
??? ?at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1369)
??? ?at android.widget.LinearLayout.measureVertical(LinearLayout.java:660)
??? ?at android.widget.LinearLayout.onMeasure(LinearLayout.java:553)
??? ?at android.view.View.measure(View.java:12728)
??? ?at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4698)
??? ?at android.widget.FrameLayout.onMeasure(FrameLayout.java:293)
??? ?at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2095)
??? ?at android.view.View.measure(View.java:12728)
??? ?at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1064)
??? ?at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2442)
??? ?at android.os.Handler.dispatchMessage(Handler.java:99)
??? ?at android.os.Looper.loop(Looper.java:137)
??? ?at android.app.ActivityThread.main(ActivityThread.java:4426)
??? ?at java.lang.reflect.Method.invokeNative(Native Method)
??? ?at java.lang.reflect.Method.invoke(Method.java:511)
??? ?at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:788)
??? ?at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:555)
??? ?at dalvik.system.NativeStart.main(Native Method)

解決辦法:

如果你要將一個view添加到另一個布局中，你必須設定該View的布局參數為其父類所使用的布局參數類型。

RelativeLayout.LayoutParams layoutParams=new RelativeLayout.
?? ??? ??? ??? ?LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT);
?? ??? ?layoutParams.setMargins(0, 120, 0, 0);

轉載于:https://my.oschina.net/arrom/blog/224958

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