I can't insert data into a SQLite databse on Android -

i trying insert room numbers , coordinates database, access them give directions rooms, seems failing insert data database.

here database handler:

public class mrldatabasehandler extends sqliteopenhelper {        //private context context;     //private string locationsfile;       private static final int database_version = 1;      private static final string database_name = "mrl_locationsdb3";      static final string table_locations = "locations"; //table name      private static final string key_id = "_gpspoint_id";     private static final string key_rnumber = "_rnumber";     private static final string key_lat = "_latitude";     private static final string key_longi = "_longitude";     private static final string key_alti = "_altitude";       public mrldatabasehandler(context context) {         super(context, database_name, null, database_version);         //this.context = context;         //locationsfile = context.getstring(r.string.mrl_locations);     }       @override     public void oncreate(sqlitedatabase db) {         string create_locations_table = "create table " + table_locations + "("                 + key_id + " integer primary key autoincrement," + key_rnumber + " text," + key_lat + " double,"                 + key_longi + " double,"  + key_alti + " double"+ ")";         db.execsql(create_locations_table);          //populating locations table         /**mrl_locationsloader locationloader = new mrl_locationsloader(context, db, locationsfile);             try {                 locationloader.loaddata();              }catch (ioexception e){                 e.printstacktrace();                 } ***/       }      @override     public void onupgrade(sqlitedatabase db, int oldversion, int newversion) {          db.execsql("drop table if exists " + table_locations);          // create tables again         oncreate(db);      }  //////crud implemetation     // adding new coordinate         void addcoordinate( mrl_locationsmodelclass point) {             sqlitedatabase db = this.getwritabledatabase();              contentvalues values = new contentvalues();             values.put(key_id , point.get_gpspoint_id());             values.put(key_rnumber, point.get_rnumber());              values.put(key_lat, point.get_latitude());              values.put(key_longi, point.get_longitude());              values.put(key_alti, point.get_altitude());                // inserting row             db.insert(table_locations, null, values);             db.close(); // closing database connection         }      // getting single coordinate sqlite database     mrl_locationsmodelclass getpoint(int id) {         sqlitedatabase db = this.getreadabledatabase();          cursor cursor = db.query(table_locations, new string[] { key_id,                 key_rnumber, key_lat, key_longi, key_alti }, key_id + "=?",                 new string[] { string.valueof(id) }, null, null, null, null);         if (cursor != null)             cursor.movetofirst();          mrl_locationsmodelclass locationsmodelclass = new mrl_locationsmodelclass(                 integer.parseint(cursor.getstring(0)), cursor.getstring(1),                 double.parsedouble(cursor.getstring(2)),                 double.parsedouble(cursor.getstring(3)),                 double.parsedouble(cursor.getstring(4)));         // return contact         return locationsmodelclass;      } 

here class using it:

public class drawpath extends activity {      mrldatabasehandler db = new mrldatabasehandler(this);     int dest = 9, src = 6;      @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);          // inserting coordinates                 log.d("insert: ", "inserting ..");                 db.addcoordinate(new mrl_locationsmodelclass("l101", -12.804646,28.240218,  (double) 1223));                 db.addcoordinate(new mrl_locationsmodelclass("c102", -12.8048,28.240736, (double) 1227));                 db.addcoordinate(new mrl_locationsmodelclass("z103", -12.805274,28.240529, (double) 1225));                 db.addcoordinate(new mrl_locationsmodelclass("a104", -12.805347,28.238821, (double) 1232));                 db.addcoordinate(new mrl_locationsmodelclass("nh201",-12.804497,28.24068, (double) 1222));            mrl_locationsmodelclass srcpoint = db.getpoint(src);         mrl_locationsmodelclass destpoint = db.getpoint(dest);         shareddata data = shareddata.getinstance();         data.setapikey("0fm62i15vxd_pvpf8wxdtk0ooud2wm8rxst3kvg");         data.setsrc_lat(srcpoint.get_latitude());         data.setsrc_lng(srcpoint.get_longitude());         data.setdest_lat(destpoint.get_latitude());         data.setdest_lng(destpoint.get_longitude());         startactivity(new intent(drawpath.this,routepath.class));       }    } 

and here logcat:

03-13 05:19:26.337: d/insert:(618): inserting .. 03-13 05:19:30.940: e/database(618): error inserting _longitude=28.240736 _rnumber=c102 _altitude=1227.0 _latitude=-12.8048 _gpspoint_id=0 03-13 05:19:30.940: e/database(618): android.database.sqlite.sqliteconstraintexception: error code 19: constraint failed 03-13 05:19:30.940: e/database(618):    @ android.database.sqlite.sqlitestatement.native_execute(native method) 03-13 05:19:30.940: e/database(618):    @ android.database.sqlite.sqlitestatement.execute(sqlitestatement.java:55) 03-13 05:19:30.940: e/database(618):    @ android.database.sqlite.sqlitedatabase.insertwithonconflict(sqlitedatabase.java:1549) 03-13 05:19:30.940: e/database(618):    @ android.database.sqlite.sqlitedatabase.insert(sqlitedatabase.java:1410) 03-13 05:19:30.940: e/database(618):    @ com.agarwal.route.mrldatabasehandler.addcoordinate(mrldatabasehandler.java:84) 03-13 05:19:30.940: e/database(618):    @ com.agarwal.route.drawpath.oncreate(drawpath.java:20) 03-13 05:19:30.940: e/database(618):    @ android.app.instrumentation.callactivityoncreate(instrumentation.java:1047) 03-13 05:19:30.940: e/database(618):    @ android.app.activitythread.performlaunchactivity(activitythread.java:2627) 03-13 05:19:30.940: e/database(618):    @ android.app.activitythread.handlelaunchactivity(activitythread.java:2679) 03-13 05:19:30.940: e/database(618):    @ android.app.activitythread.access$2300(activitythread.java:125) 03-13 05:19:30.940: e/database(618):    @ android.app.activitythread$h.handlemessage(activitythread.java:2033) 03-13 05:19:30.940: e/database(618):    @ android.os.handler.dispatchmessage(handler.java:99) 03-13 05:19:30.940: e/database(618):    @ android.os.looper.loop(looper.java:123) 03-13 05:19:30.940: e/database(618):    @ android.app.activitythread.main(activitythread.java:4627) 03-13 05:19:30.940: e/database(618):    @ java.lang.reflect.method.invokenative(native method) 03-13 05:19:30.940: e/database(618):    @ java.lang.reflect.method.invoke(method.java:521) 03-13 05:19:30.940: e/database(618):    @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:868) 03-13 05:19:30.940: e/database(618):    @ com.android.internal.os.zygoteinit.main(zygoteinit.java:626) 03-13 05:19:30.940: e/database(618):    @ dalvik.system.nativestart.main(native method) 

you're trying add value 0 integer primary key column on , on again. causes constraint failure.

to fix it, remove line addcoordinate():

values.put(key_id , point.get_gpspoint_id()); 

to capture autogenerated id value, take return value insert():

long id = db.insert(table_locations, null, values); point.set_gpspoint_id(id); 

(old question got bumped edit.)