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Attempt to invoke virtual method 'char java.lang.String.charAt(int)' on a null object reference
java.lang.NullPointerException: Attempt to invoke virtual method 'char java.lang.String.charAt(int)' on a null object reference	at asia.sumikawa.cybereyeview.liveActivity.playAll(liveActivity.java:307)	at asia.sumikawa.cybereyeview.liveActivity.onCreate(liveActivity.java:77)