android - cursor.moveToFirst() always returns false -

i using following code retrieve values db table.

public list<string> getprocedure() {     list<string> labels = new arraylist<string>();      string selectquery = "select * " + tablename;      sqlitedatabase db = this.getreadabledatabase();      cursor cursor = db.rawquery(selectquery, null);     log.d("before", "if");      if (cursor.movetofirst()) {         log.d("inside", "if");         while (cursor.movetonext()) {             log.d("inside", "while");             labels.add(cursor.getstring(1));         }     }            cursor.close();     db.close();          return labels; } 

and never log message "inside if" in logcat. mean?

i have data inside table , hence not able retrieve it! how rectify it?? please help!!

my stack trace:

e/sensormanager(6951): thread start d/sensormanager(6951): registerlistener :: handle = 4  name= mpl accel delay= 200000            listener= android.view.orientationeventlistener$sensoreventlistenerimpl@4207eb60 d/before(6951): if d/sensormanager(6951): unregisterlistener::  listener=     android.view.orientationeventlistener$sensoreventlistenerimpl@4207eb60 d/sensors(6951): remain listener = sending .. normal delay 200ms i/sensors(6951): senddelay --- 200000000 d/sensormanager(6951): jni - senddelay i/sensormanager(6951): set normal delay = true d/sensormanager(6951): registerlistener :: handle = 4  name= mpl accel delay= 200000     listener= android.view.orientationeventlistener$sensoreventlistenerimpl@4207eb60 i/adreno200-eglsub(6951): <configwindowmatch:2087>: format rgba_8888. e/spannablestringbuilder(6951): span_exclusive_exclusive spans cannot have 0 length e/spannablestringbuilder(6951): span_exclusive_exclusive spans cannot have 0 length