Android，android官網

Android，android官網
Exception raised during rendering: java.lang.System.arraycopy

本文地址: http://blog.csdn.net/caroline_wendy

Error: Exception raised during rendering: java.lang.System.arraycopy([CI[CII)V錯誤導致UI無法顯示，原因是Android的SDK使用Level20的可穿戴版本，下載其它的SDK即可。
基本原因是Android SDK的直接選取錯誤，可以修改SDK路徑，就是把Project Structure中(Command+;)，把SDK Location修改至SDK的最新路徑。
參考：http://stackoverflow.com/questions/25636400/exception-raised-during-rendering-java-lang-system-arraycopyciciiv-exceptiohttp://stackoverflow.com/questions/16581752/android-studio-how-to-change-android-sdk-path

The issue is because you are using the API level 20 for wearable devices. You need to download other sdk through the Android SDK Manager.In Eclipse, open windows->android sdk manager->select Android 4.4.2 and check Android sdk and ARM system image and click install packagesNow you have the API level 19 source code so eclipse will now be able to render the viewsNow go to the graphical layout tab of the layout and change the android version from 20 to 19.