Hi I am getting the following error in my code may be I am missing something, I have another with same kinds code and that works fine:
java.lang.NullPointerException: Attempt to invoke virtual method 'long app.akexorcist.bluetoothspp.DatabaseHelper.insertData(java.lang.String, java.lang.String, java.lang.String, java.lang.String, java.lang.String, java.lang.String, java.lang.String, java.lang.String, java.lang.String, java.lang.String, java.lang.String, java.lang.String)' on a null object reference
Here are some of the code:
Thank you
public void postDataToSQLite() { SharedPreferences sharedpreferences = getSharedPreferences(LoginActivity.MyPREFERENCES, Context.MODE_PRIVATE); SharedPreferences.Editor editor = sharedpreferences.edit();
SharedPreferences vehiclesharedpreferences = getSharedPreferences(VehicleEntryActivity.MyVehicle, Context.MODE_PRIVATE);
SharedPreferences.Editor vehicle_editor = sharedpreferences.edit();
String name = txtName.getText().toString();
String surname = txtSurname.getText().toString();
String idno = txtIDNo.getText().toString();
String birth = txtDateBirth.getText().toString();
String username = sharedpreferences.getString(Name, "");
editor.apply();
String make = vehiclesharedpreferences.getString(Make, "");
String colour = vehiclesharedpreferences.getString(Colour, "");
String expiry = vehiclesharedpreferences.getString(Expiry, "");
String regno = vehiclesharedpreferences.getString(RegNo, "");
String date = vehiclesharedpreferences.getString(DateTime, "");
String loc = vehiclesharedpreferences.getString(GPS, "");
vehicle_editor.apply();
String event = "Entry";
if(name.isEmpty() || surname.isEmpty() || idno.isEmpty() || birth.isEmpty())
{
Toast.makeText(this, "Please scan drivers licence", Toast.LENGTH_SHORT).show();
}
else
{
long id = helper.insertData(make,colour,expiry,regno,date,loc,name,surname,idno,birth,event,username);
Intent intent = null;
if(id<=0)
{
Message.message(getApplicationContext(),"Failed... Please Check Data");
}
else
{
Message.message(getApplicationContext(),"Insert Successful");
intent = new Intent(getApplicationContext(), Main.class);
startActivity(intent);
}
}
}
Database helper class:
public long insertData(String make, String colour, String expiry,String regno,String date,String loc,String name,String surname,String idno,String birth,String event,String username) { SQLiteDatabase dbb = myhelper.getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put(myDbHelper.COLUMN_MAKE, make);
contentValues.put(myDbHelper.COLUMN_COLOUR, colour);
contentValues.put(myDbHelper.COLUMN_EXPIRY_DATE, expiry);
contentValues.put(myDbHelper.COLUMN_REG_NO, regno);
contentValues.put(myDbHelper.COLUMN_DATE, date);
contentValues.put(myDbHelper.COLUMN_LOC, loc);
contentValues.put(myDbHelper.COLUMN_DRIVER_NAME, name);
contentValues.put(myDbHelper.COLUMN_DRIVER_SURNAME, surname);
contentValues.put(myDbHelper.COLUMN_DRIVER_IDNO, idno);
contentValues.put(myDbHelper.COLUMN_DRIVER_BIRTH, birth);
contentValues.put(myDbHelper.COLUMN_EVENT, event);
contentValues.put(myDbHelper.COLUMN_ENTRY_USERNAME, username);
long id = dbb.insert(myDbHelper.TABLE_SCAN, null , contentValues);
dbb.close();
return id;
}
E/AndroidRuntime: FATAL EXCEPTION: main Process: app.akexorcist.bluetoothspp, PID: 23330 java.lang.NullPointerException: Attempt to invoke virtual method 'long app.akexorcist.bluetoothspp.DatabaseHelper.insertData(java.lang.String, java.lang.String, java.lang.String, java.lang.String, java.lang.String, java.lang.String, java.lang.String, java.lang.String, java.lang.String, java.lang.String, java.lang.String, java.lang.String)' on a null object reference at app.akexorcist.bluetoothspp.LicenseEntryActivity.postDataToSQLite(LicenseEntryActivity.java:281) at app.akexorcist.bluetoothspp.LicenseEntryActivity$1.onClick(LicenseEntryActivity.java:81) at android.view.View.performClick(View.java:4781) at android.view.View$PerformClick.run(View.java:19874) at android.os.Handler.handleCallback(Handler.java:739) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:135) at android.app.ActivityThread.main(ActivityThread.java:5254) at java.lang.reflect.Method.invoke(Native Method) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:902) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:697)
