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    java.lang.NullPointerException
        at com.codename1.impl.android.AndroidAsyncView.flushGraphics(AndroidAsyncView.java:368)
        at com.codename1.impl.android.AndroidImplementation.flushGraphics(AndroidImplementation.java:934)
        at com.codename1.impl.CodenameOneImplementation.paintDirty(CodenameOneImplementation.java:547)
        at com.codename1.ui.Display.edtLoopImpl(Display.java:1074)
    4 frames hidden