PanelSlideListener on a null object reference

[ModirGithub]

Fatal Exception: java.lang.RuntimeException: Unable to start activity ComponentInfo java.lang.NullPointerException: Attempt to invoke virtual method 'void com.sothree.slidinguppanel.SlidingUpPanelLayout.addPanelSlideListener(com.sothree.slidinguppanel.SlidingUpPanelLayout$PanelSlideListener)' on a null object reference

[peter-yeh]

did u initialise and declare the slider???

[ModirGithub]

did u initialise and declare the slider???

crashed on Android 8.0.0
other version fixed

[ModirGithub]

Fatal Exception: java.lang.RuntimeException: Unable to start activity ComponentInfo java.lang.NullPointerException: Attempt to invoke virtual method 'void com.sothree.slidinguppanel.SlidingUpPanelLayout.addPanelSlideListener(com.sothree.slidinguppanel.SlidingUpPanelLayout$PanelSlideListener)' on a null object reference

FIX this Bug by insert this cods after setContentView

if (Build.VERSION.SDK_INT == 26) { setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED); } else { setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT); }