Share Button on Navigation Drawer #646

Describe the bug
On Clicking Share Button Application crashes

Expected Behavior
The share option not showing

Steps to reproduce it

LogCat for the issue
java.lang.RuntimeException: Unable to start activity ComponentInfo{io.neurolab/io.neurolab.activities.ShareDataActivity}: java.lang.NullPointerException: Attempt to get length of null array
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3497)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3636)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:140)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:100)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2222)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:228)
at android.app.ActivityThread.main(ActivityThread.java:7782)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:981)
Caused by: java.lang.NullPointerException: Attempt to get length of null array
at io.neurolab.activities.ShareDataActivity.onCreate(ShareDataActivity.java:68)
at android.app.Activity.performCreate(Activity.java:7964)
at android.app.Activity.performCreate(Activity.java:7953)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1307)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3472)

Screenshots of the issue

System Information

Would you like to work on the issue?
Yes