Develop Reference

Com.example path with errors

When I was releasing an apk on google play I had to use a different package name cause of "com.example". I tried this and I get crash after testing an application. Before that everything was ok. I can send a manifest.
There are my errors.
My classes
Details.java
public class Details extends AppCompatActivity {
NoteDatabase db;
Note note;
TextView mDetails;
TextView clientDetails;
TextView timeDetails;
TextView nameDetails;
TextView detailsDetails;
ImageView noteDetails;
private Bitmap getImageFromByte(byte[] zdjecie){
return BitmapFactory.decodeByteArray(zdjecie, 0, zdjecie.length);
}
#SuppressLint("WrongThread")
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_details);
Toolbar toolbar = findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
mDetails = findViewById(R.id.detailsOfNote);
mDetails.setMovementMethod(new ScrollingMovementMethod());
clientDetails = findViewById(R.id.clientOfNote);
timeDetails = findViewById(R.id.timeofNote);
nameDetails = findViewById(R.id.nameOfNote);
detailsDetails = findViewById(R.id.detailsOfNote);
noteDetails = findViewById(R.id.noteImage);
Intent i = getIntent();
Long id = i.getLongExtra("ID", 0);
db = new NoteDatabase(this);
note = db.getNote(id);
getSupportActionBar().setTitle(note.getTitle());
mDetails.setText(note.getContent());
clientDetails.setText(note.getTitle());
timeDetails.setText(note.getTime());
nameDetails.setText(note.getName());
detailsDetails.setText(note.getDetails());
noteDetails.setImageBitmap(stringToImage(note.getImage()));
Toast.makeText(this, "Podgląd klienta", Toast.LENGTH_SHORT).show();
FloatingActionButton fab = findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
db.deleteNote(note.getID());
Toast.makeText(getApplicationContext(), "Klient usunięty", Toast.LENGTH_SHORT).show();
startActivity(new Intent(getApplicationContext(),klienci.class));
}
});
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.edit_menu, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(#NonNull MenuItem item) {
if(item.getItemId() == R.id.editNote){
Toast.makeText(this, "Edytowanie notatki", Toast.LENGTH_SHORT).show();
Intent i = new Intent(this,Edit.class);
i.putExtra("ID",note.getID());
startActivity(i);
}
return super.onOptionsItemSelected(item);
}
private void goToMain() {
Intent i = new Intent(this,klienci.class);
startActivity(i);
}
private Bitmap stringToImage(String imgString){
byte[] decodedString = Base64.decode(imgString,Base64.DEFAULT);
Bitmap decodedByte = BitmapFactory.decodeByteArray(decodedString,0,decodedString.length);
return decodedByte;
}
NoteDatabase.java
public class NoteDatabase extends SQLiteOpenHelper {
private static final int DATABASE_VERSION = 42;
private static final String DATABASE_NAME = "notedbs";
private static final String DATABASE_TABLE = "notestables";
private static final String KEY_ID = "id";
private static final String KEY_TITLE = "title";
private static final String KEY_CONTENT = "content";
private static final String KEY_DATE = "date";
private static final String KEY_TIME = "time";
private static final String KEY_PHONE = "phone";
private static final String KEY_CLIENT = "client";
private static final String KEY_DETAILS = "details";
private static final String KEY_IMAGE = "image";
NoteDatabase(Context context) {
super(context, DATABASE_NAME,null,DATABASE_VERSION);
}
#Override
public void onCreate(SQLiteDatabase db) {
String query = "CREATE TABLE "+ DATABASE_TABLE + "("+ KEY_ID+" INT PRIMARY KEY,"+
KEY_TITLE + " TEXT,"+
KEY_CONTENT + " TEXT,"+
KEY_DATE + " TEXT,"+
KEY_TIME + " TEXT,"+
KEY_CLIENT + " TEXT,"+
KEY_DETAILS + " TEXT,"+
KEY_PHONE + " TEXT,"+
KEY_IMAGE + " TEXT"+")";
db.execSQL(query);
}
#Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
if(oldVersion >= newVersion)
return;
db.execSQL("DROP TABLE IF EXISTS " + DATABASE_TABLE);
onCreate(db);
}
public long addNote(Note note) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues c = new ContentValues();
c.put(KEY_TITLE,note.getTitle());
c.put(KEY_CONTENT,note.getContent());
c.put(KEY_PHONE,note.getPhone());
c.put(KEY_CLIENT,note.getClient());
c.put(KEY_DETAILS,note.getDetails());
c.put(KEY_DATE,note.getDate());
c.put(KEY_TIME,note.getTime());
c.put(KEY_IMAGE,note.getImage());
long ID = db.insert(DATABASE_TABLE,null, c);
Log.d("Inserted", "ID -> " + ID);
return ID;
}
public Note getNote(long id){
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = db.query(DATABASE_TABLE,new String[] {KEY_ID,KEY_TITLE,KEY_CONTENT,KEY_PHONE,KEY_CLIENT,KEY_DETAILS,KEY_DATE,KEY_TIME,KEY_IMAGE}, KEY_ID+"=?",
new String[]{String.valueOf(id)}, null, null,null);
if (cursor != null)
cursor.moveToFirst();
return new Note
(cursor.getLong(0)
,cursor.getString(1)
,cursor.getString(2)
,cursor.getString(3)
,cursor.getString(4)
,cursor.getString(5)
,cursor.getString(6)
,cursor.getString(7)
,cursor.getString(8));
}
public List<Note> getNotes() {
SQLiteDatabase db = this.getReadableDatabase();
List<Note> allNotes = new ArrayList<>();
String query = "SELECT * FROM " + DATABASE_TABLE + " ORDER BY "+KEY_TITLE+" ASC";
Cursor cursor = db.rawQuery(query,null);
if(cursor.moveToFirst()){
do{
Note note = new Note();
note.setID(cursor.getLong(0));
note.setTitle(cursor.getString(1));
note.setDetails(cursor.getString(2));
note.setPhone(cursor.getString(3));
note.setClient(cursor.getString(4));
note.setContent(cursor.getString(5));
note.setDate(cursor.getString(6));
note.setTime(cursor.getString(7));
note.setImage(cursor.getString(8));
allNotes.add(note);
}while(cursor.moveToNext());
}
return allNotes;
}
public int editNote(Note note){
SQLiteDatabase db = this.getWritableDatabase();
ContentValues c = new ContentValues();
Log.d("Edited", "Edited Title: -> "+ note.getTitle() + "\n ID -> "+note.getZdjecie());
c.put(KEY_TITLE,note.getTitle());
c.put(KEY_CONTENT,note.getContent());
c.put(KEY_PHONE,note.getPhone());
c.put(KEY_CLIENT,note.getClient());
c.put(KEY_DETAILS,note.getDetails());
c.put(KEY_DATE,note.getDate());
c.put(KEY_TIME,note.getTime());
c.put(KEY_IMAGE,note.getImage());
return db.update(DATABASE_TABLE,c,KEY_ID +"=?",new String[]{String.valueOf(note.getID())});
}
void deleteNote(long id) {
SQLiteDatabase db = this.getWritableDatabase();
db.delete(DATABASE_TABLE, KEY_ID + "=?", new String[]{String.valueOf(id)});
db.close();
}

You are trying to get 0 index in the database. Every time you add a new Note its ID will be 0. So, change your database KEY_ID to AUTOINCREMENT.
String query = "CREATE TABLE " + DATABASE_TABLE + "(" + KEY_ID + " INTEGER PRIMARY KEY AUTOINCREMENT," +
KEY_TITLE + " TEXT," +
KEY_CONTENT + " TEXT," +
KEY_DATE + " TEXT," +
KEY_TIME + " TEXT," +
KEY_PIES + " TEXT," +
KEY_RASAPSA + " TEXT," +
KEY_TEL + " TEXT," +
KEY_ZDJECIE + " TEXT" + ")";
db.execSQL(query);
Then check your cursor not null in
getNote()

Adding Date (TextView) into SQLite Database

I'm creating an SQLiteDatabase, I was able to add all the EditText values into the Database however when trying to add a Date which I have used a DatePicker to find and input into TextView, the app crashes.
Is there a different way to insert TextView values into SQLiteDatabase.
Main Activity:
public class MainActivity extends AppCompatActivity implements DatePickerDialog.OnDateSetListener {
DatabaseHelper peopleDB;
TextView etDate;
Button btnAddData, btnViewData;
EditText etName, etEmail, etAddress;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
peopleDB = new DatabaseHelper(this);
etName = (EditText) findViewById(R.id.editName);
etEmail = (EditText) findViewById(R.id.editEmail);
etAddress = (EditText) findViewById(R.id.editAddress);
etDate = (TextView) findViewById(R.id.textView4);
btnAddData = (Button) findViewById(R.id.btnAddData);
btnViewData = (Button) findViewById(R.id.btnViewData);
Button button = (Button) findViewById(R.id.button);
button.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
DialogFragment datePicker = new DatePickerFragment();
datePicker.show(getSupportFragmentManager(), "date picker");
}
});
AddData();
ViewData();
}
public void AddData() {
btnAddData.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
String name = etName.getText().toString();
String email = etEmail.getText().toString();
String tvShow = etAddress.getText().toString();
String date = etDate.getText().toString();
boolean insertData = peopleDB.addData(name, email, tvShow, date);
if (insertData == true) {
Toast.makeText(MainActivity.this, "Data Successfully Inserted!", Toast.LENGTH_LONG).show();
} else {
Toast.makeText(MainActivity.this, "Something went wrong :(.", Toast.LENGTH_LONG).show();
}
}
});
}
#Override
public void onDateSet(DatePicker view, int year, int month, int dayOfMonth) {
Calendar c = Calendar.getInstance();
c.set(Calendar.YEAR, year);
c.set(Calendar.MONTH, month);
c.set(Calendar.DAY_OF_MONTH, dayOfMonth);
String currentDateString = DateFormat.getDateInstance(DateFormat.FULL).format(c.getTime());
TextView textView = (TextView) findViewById(R.id.textView4);
textView.setText(currentDateString);
}
public void ViewData() {
btnViewData.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Cursor data = peopleDB.showData();
if(data.getCount() == 0) {
display("Error", "No Data Found.");
return;
}
//display message
String datestring = etDate.getText().toString();
StringBuffer buffer = new StringBuffer();
while (data.moveToNext()){
buffer.append("ID: " + data.getString(0) + "\n");
buffer.append("Name: " + data.getString(1) + "\n");
buffer.append("Email: " + data.getString(2) + "\n");
buffer.append("Address: " + data.getString(3) + "\n");
buffer.append("Date: " + data.getString(4) + "\n");
}
display("All Stored Data:", buffer.toString());
}
});
}
DatabaseHelper Activity:
public class DatabaseHelper extends SQLiteOpenHelper {
public static final String DATABASE_NAME = "people.db";
public static final String TABLE_NAME = "people_table";
public static final String COL1 = "ID";
public static final String COL2 = "NAME";
public static final String COL3 = "EMAIL";
public static final String COL4 = "ADDRESS";
public static final String COL5 = "DATE";
public DatabaseHelper(Context context) {
super(context, DATABASE_NAME, null, 1);
}
#Override
public void onCreate(SQLiteDatabase db) {
String createTable = "CREATE TABLE " + TABLE_NAME + " (ID INTEGER PRIMARY KEY AUTOINCREMENT, " +
" NAME TEXT, EMAIL TEXT, ADDRESS TEXT)";
db.execSQL(createTable);
}
#Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
db.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME);
onCreate(db);
}
public boolean addData(String name, String email, String address, String date){
SQLiteDatabase db = this.getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put(COL2, name);
contentValues.put(COL3, email);
contentValues.put(COL4, address);
contentValues.put(COL5, date);
long result = db.insert(TABLE_NAME, null, contentValues);
if (result == -1) {
return false;
}
else {
return true;
}
}
public Cursor showData(){
SQLiteDatabase db = this.getWritableDatabase();
Cursor data = db.rawQuery("SELECT * FROM " + TABLE_NAME, null);
return data;
}
}

I think that you did not add date column in create database statement so change this at DatabaseHelper class
#Override
public void onCreate(SQLiteDatabase db) {
String createTable = "CREATE TABLE " + TABLE_NAME + " (ID INTEGER PRIMARY KEY AUTOINCREMENT, " +
" NAME TEXT, EMAIL TEXT, ADDRESS TEXT)";
db.execSQL(createTable);
}
to
#Override
public void onCreate(SQLiteDatabase db) {
String createTable = "CREATE TABLE " + TABLE_NAME + " (ID INTEGER PRIMARY KEY AUTOINCREMENT, " +
" NAME TEXT, EMAIL TEXT, ADDRESS TEXT , DATE DATETIME)";
db.execSQL(createTable);
}
For best code refactor variables names by click shift+F6 then rename
public static final String COL1 = "ID";
public static final String COL2 = "NAME";
public static final String COL3 = "EMAIL";
public static final String COL4 = "ADDRESS";
public static final String COL5 = "DATE";
to
public static final String COL_ID = "ID";
public static final String COL_NAME = "NAME";
public static final String COL_EMAIL = "EMAIL";
public static final String COL_ADDRESS = "ADDRESS";
public static final String COL_DATE = "DATE";
and change create statement to
#Override
public void onCreate(SQLiteDatabase db) {
String createTable = "CREATE TABLE " + TABLE_NAME + " (" +
COL_ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " +
COL_NAME +" TEXT," +
COL_EMAIL +" TEXT,"+
COL_ADDRESS + " TEXT ,"+
COL_DATE + " DATETIME)";
db.execSQL(createTable);
}

Problem with inserting new record to sqlite in android studio

I want to insert a new record into a sqlite db.
My table is called words. It has the columns id, word, meaning, details, lesson, ticks.
When I try to insert a new record, it just saves details as word and lesson as meaning, whereas details and lesson are stored with a null value.
The autoincrement primary key id and ticks are stored correctly.
Code
Handler:
public class DatabaseHandler extends SQLiteOpenHelper {
private static final int DATABASE_VERSION = 1;
protected static final String DATABASE_NAME = "wordDatabase";
public DatabaseHandler(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
#Override
public void onCreate(SQLiteDatabase db) {
String sql = "CREATE TABLE words " +
"( id INTEGER PRIMARY KEY AUTOINCREMENT, " +
"word TEXT, " +
"meaning TEXT, " +
"details TEXT, " +
"lesson TEXT, " +
"ticks INTEGER ) ";
db.execSQL(sql);
}
#Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
String sql = "DROP TABLE IF EXISTS words";
db.execSQL(sql);
onCreate(db);
}
Object:
public class ObjectStudent {
int id;
String word;
String meaning;
String details;
String lesson;
int ticks;
public ObjectStudent(){
}
OnClickListener:
public class OnClickeListenerCreateStudent implements View.OnClickListener {
#Override
public void onClick(View view) {
final Context context = view.getRootView().getContext();
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
final View formElementsView = inflater.inflate(R.layout.student_input_form, null, false);
final EditText et_word = (EditText) formElementsView.findViewById(R.id.et_word);
final EditText et_meaning = (EditText) formElementsView.findViewById(R.id.et_meaning);
final EditText et_details = (EditText) formElementsView.findViewById(R.id.et_details);
final EditText et_lesson = (EditText) formElementsView.findViewById(R.id.et_lesson);
new AlertDialog.Builder(context)
.setView(formElementsView)
.setTitle("Create Word")
.setPositiveButton("Add",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
String wordTitle = et_word.getText().toString();
String wordMeaning = et_meaning.getText().toString();
String wordDetails = et_details.getText().toString();
String wordLesson = et_lesson.getText().toString();
ObjectStudent objectStudent = new ObjectStudent();
/* objectStudent.word= wordTitle;
objectStudent.meaning= wordMeaning;
objectStudent.details= wordDetails;
objectStudent.lesson= wordLesson;*/
objectStudent.word = "word"; // et_word.getText().toString();
objectStudent.meaning = "meaning"; // et_meaning.getText().toString();
objectStudent.details = "details"; // et_details.getText().toString();
objectStudent.lesson = "lesson"; // et_lesson.getText().toString();
objectStudent.ticks= 1;
boolean createSuccessful = new TableControllerStudent(context).create(objectStudent);
if(createSuccessful){
Toast.makeText(context, "Word information was saved.", Toast.LENGTH_SHORT).show();
}else{
Toast.makeText(context, "Unable to save Word information.", Toast.LENGTH_SHORT).show();
}
((MainActivity) context).countRecords();
((MainActivity) context).readRecords();
dialog.cancel();
}
}).show();
}
Create method on TableControllerStudent class:
public class TableControllerStudent extends DatabaseHandler {
public TableControllerStudent(Context context) {
super(context);
}
public boolean create(ObjectStudent objectStudent) {
ContentValues values = new ContentValues();
/* values.put("word", objectStudent.word);
values.put("meaning", objectStudent.meaning);
values.put("details", objectStudent.details);
values.put("lesson", objectStudent.lesson);*/
values.put("word", "w");
values.put("meaning", "m");
values.put("details", "d");
values.put("lesson", "l");
values.put("ticks", objectStudent.ticks);
SQLiteDatabase db = this.getWritableDatabase();
db.execSQL("INSERT INTO " + "words "+ "(word, meaning,details, lesson, ticks ) VALUES ('word','meaning','details','lesson',2)");
//boolean createSuccessful = db.insert("words", null, values) > 0;
db.close();
//return createSuccessful;
return true;
}

Just update Database version to higher version(instead of 1,use 5).And check it.before run the application ,please uninstall and then run.

Use
db.insert(YOUR_TABLE_NAME,values);
instead of
db.execSQL() function

java.lang.NoSuchMethodException: perfIOPrefetchStart [duplicate]

public class Main2Activity extends AppCompatActivity {
private EditText editText1, editText2, editText3, editText4;
private Button button;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
editText1 = (EditText) findViewById(R.id.editText);
editText2 = (EditText) findViewById(R.id.editText2);
editText3 = (EditText) findViewById(R.id.editText3);
editText4 = (EditText) findViewById(R.id.editText4);
button = (Button) findViewById(R.id.button3);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String un, pw, cpw, ph;
un = editText1.getText().toString();
pw = editText2.getText().toString();
cpw = editText3.getText().toString();
ph = editText4.getText().toString();
DbHelper dbHelpero = new DbHelper(Main2Activity.this);
SQLiteDatabase db = dbHelpero.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(Entry.C_UNAME, un);
values.put(Entry.C_PASS, pw);
values.put(Entry.C_CPASS, cpw);
values.put(Entry.C_PNO, ph);
long newRowId = db.insert(Entry.TABLE_NAME, null, values);
if (newRowId == -1) {
Toast.makeText(getApplicationContext(), "Error while adding", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(getApplicationContext(), "Yo Registration is complete", Toast.LENGTH_SHORT).show();
}
}
});
}
}
Here is the Contract.java
public class Contract {
private Contract() {
}
public static final class Entry implements BaseColumns {
public final static String TABLE_NAME = "details";
public final static String _ID = BaseColumns._ID;
public final static String C_UNAME = "uname";
public final static String C_PASS = "pw";
public final static String C_CPASS = "cpw";
public final static String C_PNO = "pno";
}
}
And the DbHelper.java
public class DbHelper extends SQLiteOpenHelper {
public static final String LOG_TAG = DbHelper.class.getSimpleName();
public final static String DATABASE_NAME = "contacts.db";
private static final int DATABASE_VERSION = 1;
public DbHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
#Override
public void onCreate(SQLiteDatabase db) {
String CREATE_TABLE = "CREATE TABLE " + Entry.TABLE_NAME + " ("
+ Entry._ID + " TEXT PRIMARY KEY AUTOINCREMENT, "
+ Entry.C_UNAME + " TEXT, "
+ Entry.C_PASS + " TEXT, "
+ Entry.C_CPASS + " TEXT, "
+ Entry.C_PNO + " TEXT" + ")";
db.execSQL(CREATE_TABLE);
}
#Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
}
}
There are no syntax errors but still, the app is crashing.

Replace your CREATE_TABLE query with:
String CREATE_TABLE = "CREATE TABLE " + Entry.TABLE_NAME + " ("
+ Entry._ID + " INTEGER PRIMARY KEY AUTOINCREMENT, "
+ Entry.C_UNAME + " TEXT, "
+ Entry.C_PASS + " TEXT, "
+ Entry.C_CPASS + " TEXT, "
+ Entry.C_PNO + " TEXT" + ")";
You can't have a TEXT type have an AUTOINCREMENT property as you currently have it on your _ID field. You need to change it to be an INTEGER so it can be used as PRIMARY KEY and then have it AUTOINCREMENT

How to update a password in a SQLite database (Login and Registration System)? [duplicate]

This question already has answers here:
Unfortunately MyApp has stopped. How can I solve this?
(23 answers)
Closed 5 years ago.
When I click Submit Button in Change password class or layout the app crashes. What's wrong with my code, please teach me! Thanks in Advance. I am working with Sqlite database for user login system and user can change their password from app bar layout. On clicking >>change password in App Bar new activity pops up i.e changePassword Activity. Upto here everything works fine but after typing password and clicking on submit button the app crashes and sets back to MainActivity.
Here is my change password class
public class changePasswordActivity extends AppCompatActivity {
EditText oldpasswordEditText;
EditText newpasswordEditText;
EditText confirmpasswordEditText;
Button btnsubmit;
String realusername, realpassword;
String checkoldpass, checknewpass, checkconfirmpass;
SQLiteHelper sqLiteHelper;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_change_password);
oldpasswordEditText = findViewById(R.id.oldpasswordEditText);
newpasswordEditText = findViewById(R.id.newPasswordEditText);
confirmpasswordEditText = findViewById(R.id.confirmPasswordEditText);
btnsubmit= findViewById(R.id.btnsubmit);
checkoldpass = oldpasswordEditText.getText().toString();
checknewpass = newpasswordEditText.getText().toString();
checkconfirmpass = confirmpasswordEditText.getText().toString();
realusername = getIntent().getStringExtra("USERNAME");
realpassword= getIntent().getStringExtra("PASSWORD");
btnsubmit.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if(!(checkconfirmpass.equals(checknewpass))) {
Toast.makeText(changePasswordActivity.this,"New Password didn't matched",Toast.LENGTH_SHORT).show();
}else if (!(realpassword.equals(checkoldpass))){
Toast.makeText(changePasswordActivity.this,"Old password didn't matched",Toast.LENGTH_SHORT).show();
}
else if (checkconfirmpass.equals(checkoldpass)){
Toast.makeText(changePasswordActivity.this,"New password cannot be same as old password",Toast.LENGTH_SHORT).show();
}else if(checkconfirmpass.equals(checknewpass.equals(checkoldpass))) {
Toast.makeText(changePasswordActivity.this, "New password cannot be same as old password", Toast.LENGTH_SHORT).show();
}
else{
sqLiteHelper = new SQLiteHelper(changePasswordActivity.this);
sqLiteHelper.changepassword(checknewpass,realusername);
}
}
});
}
}
Here is my SQLiteHelper class
public class SQLiteHelper extends SQLiteOpenHelper {
SQLiteDatabase db;
private static final String DATABASE_NAME = "info.db";
private static final int DATABASE_VERSION = 1;
public static final String TABLE_NAME = "profile";
public static final String COLUMN_ID = "userid";
public static final String COLUMN_FULLNAME = "fullname";
public static final String COLUMN_EMAIL = "email";
public static final String COLUMN_PASSWORD = "password";
public static final String COLUMN_MOBILE = "mobile";
private static final String CREATE_TABLE_QUERY =
"CREATE TABLE " + TABLE_NAME + " (" +
COLUMN_ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " +
COLUMN_FULLNAME + " TEXT, " +
COLUMN_EMAIL + " TEXT, " +
COLUMN_PASSWORD + " TEXT, " +
COLUMN_MOBILE + " TEXT " + ")";
//modified constructor
public SQLiteHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
#Override
public void onCreate(SQLiteDatabase db) {
db.execSQL(CREATE_TABLE_QUERY);
}
#Override
public void onUpgrade(SQLiteDatabase db, int i, int i1) {
db.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME);
onCreate(db);
}
public Cursor getData() {
String query = "SELECT * FROM" + TABLE_NAME;
Cursor data = db.rawQuery(query, null);
return data;
}
public void changepassword(String mpassword, String mname) {
Cursor cur= db.rawQuery("UPDATE "+SQLiteHelper.TABLE_NAME+" SET "
+SQLiteHelper.COLUMN_PASSWORD
+" = '"+mpassword+"' WHERE "+ SQLiteHelper.COLUMN_EMAIL+" = ?",new String[]{mname});
}
}

db will be null, there is also no need for a Cursor, so change
public void changepassword(String mpassword, String mname) {
Cursor cur= db.rawQuery("UPDATE "+SQLiteHelper.TABLE_NAME+" SET "
+SQLiteHelper.COLUMN_PASSWORD
+" = '"+mpassword+"' WHERE "+ SQLiteHelper.COLUMN_EMAIL+" = ?",new String[]{mname});
}
To :-
public void changepassword(String mpassword, String mname) {
SQLiteDatabase db = this.getWriteableDatabae();
db.rawQuery("UPDATE "+SQLiteHelper.TABLE_NAME+" SET "
+SQLiteHelper.COLUMN_PASSWORD
+" = '"+mpassword+"' WHERE "+ SQLiteHelper.COLUMN_EMAIL+" = ?",new String[]{mname});
}
You will also have the same issue with the getData method so you should add SQLiteDatabase db = this.getWriteableDatabae(); to the getData method as well.
Alternately you could change :-
public SQLiteHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
to :-
public SQLiteHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
db = this.getWriteableDatabase();
}
In which case db will be a valid SQLiteDatabase.