java.lang.NullPointerException

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    • java.lang.NullPointerException at com.atry.MainActivity.openBT(MainActivity.java:120) at com.atry.MainActivity$1.onClick(MainActivity.java:55) at android.view.View.performClick(View.java:4439) at android.widget.Button.performClick(Button.java:139) at android.view.View$PerformClick.run(View.java:18395) at android.os.Handler.handleCallback(Handler.java:725) at android.os.Handler.dispatchMessage(Handler.java:92) at android.os.Looper.loop(Looper.java:176) at android.app.ActivityThread.main(ActivityThread.java:5317) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:511) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1102) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:869) at dalvik.system.NativeStart.main(Native Method)
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