java.lang.NullPointerException

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    samebug tip
    Assign onCickListener to imageView in ExpandableListView inside getChildView.

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    Root Cause Analysis

    1. java.lang.NullPointerException

      No message provided

      at javax.swing.plaf.basic.BasicTreeUI.paintRow()
    2. Java RT
      SystemEventQueueUtilities$ComponentWorkRequest.run
      1. javax.swing.plaf.basic.BasicTreeUI.paintRow(BasicTreeUI.java:1413)
      2. javax.swing.plaf.basic.BasicTreeUI.paint(BasicTreeUI.java:1203)
      3. javax.swing.plaf.metal.MetalTreeUI.paint(MetalTreeUI.java:152)
      4. javax.swing.plaf.ComponentUI.update(ComponentUI.java:142)
      5. javax.swing.JComponent.paintComponent(JComponent.java:742)
      6. javax.swing.JComponent.paint(JComponent.java:1005)
      7. javax.swing.JComponent.paintWithOffscreenBuffer(JComponent.java:4963)
      8. javax.swing.JComponent.paintDoubleBuffered(JComponent.java:4916)
      9. javax.swing.JComponent._paintImmediately(JComponent.java:4859)
      10. javax.swing.JComponent.paintImmediately(JComponent.java:4666)
      11. javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:451)
      12. javax.swing.SystemEventQueueUtilities$ComponentWorkRequest.run(SystemEventQueueUtilities.java:114)
      12 frames