Android:nullpointerexception when using Relativelayout with measure ()

When you use the measure () method to calculate the height of a view, you might get an error if the view contains a relativelayout layout:

07-13 13:18:34.330:e/androidruntime (12098): java.lang.NullPointerException
07-13 13:18:34.330:e/androidruntime (12098): at Android.widget.RelativeLayout.onMeasure (relativelayout.java:465)
07-13 13:18:34.330:e/androidruntime (12098): at Android.view.View.measure (view.java:15297)
......

is probably a bug of Android, Android4.4.4 version will not have this problem.

The solution is--
Judge the system version, if it is greater than or equal to 4.4.4 ignore, otherwise:

1. In this view do not use relativelayout layout, change to linerlayout or framelayout what ...

2. Before calling the measure () method, determine the value of View.getlayoutparams () and, if NULL, set a layoutparams for the YA.

   View.setlayoutparams (New Viewgroup.layoutparams (desiredwidth,desiredheight));

   Of course, you measure calculate the value may be inaccurate, but at least not crash ah ...
   Oh hehe ...

The first method is recommended.

Sync in: http://www.barryzhang.com/archives/423

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Android:nullpointerexception when using Relativelayout with measure ()