Crashing while choosing the last element in the basic list "DSListView"

[Umarlovesall]

DSListView stringDSListView;
stringDSListView = findViewById(R.id.ds_sport_list);

    ArrayList<String> al = new ArrayList<>();
    al.add("umar");
    al.add("akshay");
    al.add("arun");

    ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_dropdown_item_1line,al);
    stringDSListView.setAdapter(arrayAdapter);

This is the code and following is the logcat :

java.lang.IndexOutOfBoundsException: Index: 3, Size: 3
at java.util.ArrayList.get(ArrayList.java:437)
at android.widget.ArrayAdapter.getItem(ArrayAdapter.java:394)
at com.ramotion.directselect.DSListView.hideListView(DSListView.java:225)
at com.ramotion.directselect.DSListView.access$200(DSListView.java:37)
at com.ramotion.directselect.DSListView$4.run(DSListView.java:411)
at android.os.Handler.handleCallback(Handler.java:883)
at android.os.Handler.dispatchMessage(Handler.java:100)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7711)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:516)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:950)