notifications - Log cat unknown error on while running AccessibilityService in API 16 android -

i'm having unknown logcat warning , error message shown while tried run code in api 16 of android. it's working in android l. i'm trying fetch notifications using code.

could know this. please help.

07-09 20:52:45.850  26369-26369/? d/dalvikvm﹕ late-enabling checkjni 07-09 20:52:46.681  26369-26369/com.example.tony.acctest e/trace﹕ error opening trace file: no such file or directory (2) 07-09 20:52:47.362  26369-26369/com.example.tony.acctest i/dalvikvm﹕ not find method android.view.viewgroup.onrtlpropertieschanged, referenced method android.support.v7.widget.toolbar.onrtlpropertieschanged 07-09 20:52:47.362  26369-26369/com.example.tony.acctest w/dalvikvm﹕ vfy: unable resolve virtual method 13334: landroid/view/viewgroup;.onrtlpropertieschanged (i)v 07-09 20:52:47.362  26369-26369/com.example.tony.acctest d/dalvikvm﹕ vfy: replacing opcode 0x6f @ 0x0007 07-09 20:52:47.372  26369-26369/com.example.tony.acctest i/dalvikvm﹕ not find method android.content.res.typedarray.getchangingconfigurations, referenced method android.support.v7.internal.widget.tinttypedarray.getchangingconfigurations 07-09 20:52:47.372  26369-26369/com.example.tony.acctest w/dalvikvm﹕ vfy: unable resolve virtual method 412: landroid/content/res/typedarray;.getchangingconfigurations ()i 07-09 20:52:47.372  26369-26369/com.example.tony.acctest d/dalvikvm﹕ vfy: replacing opcode 0x6e @ 0x0002 07-09 20:52:47.372  26369-26369/com.example.tony.acctest i/dalvikvm﹕ not find method android.content.res.typedarray.gettype, referenced method android.support.v7.internal.widget.tinttypedarray.gettype 07-09 20:52:47.372  26369-26369/com.example.tony.acctest w/dalvikvm﹕ vfy: unable resolve virtual method 434: landroid/content/res/typedarray;.gettype (i)i 07-09 20:52:47.372  26369-26369/com.example.tony.acctest d/dalvikvm﹕ vfy: replacing opcode 0x6e @ 0x0002 

i'm not able run service, it's not working. per knowledge code should work api level 14.

to refer code, please take @ answer @ cannot access notification through android accessibilityservice

the logcat error still shwoing, found it. code worked when compiled api version 14.