Populate Android Listview from SQLite database

Populate Android Listview from SQLite database - java

I've been trying to populate an Android Listview from a SQLite database using the code below. I have successfully done this from an array inside the same class. But in this case I'm attempting to populate it from a String array I have returned from another class. I'm new to this so am possibly doing this completely wrong. If anyone could look at the code and advise to what I'm doing wrong that'd be brilliant.
Any help would be really appreciated with this as I'm under serious pressure to get it finished, Thanks!
LoginActivity Class
public class LoginActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.login);
final EditText txtUserName = (EditText)findViewById(R.id.txtUsername);
final EditText txtPassword = (EditText)findViewById(R.id.txtPassword);
Button btnLogin = (Button)findViewById(R.id.btnLogin);
btnLogin.setOnClickListener(new OnClickListener(){
#Override
public void onClick(View v) {
String username = txtUserName.getText().toString();
String password = txtPassword.getText().toString();
try{
if(username.length() > 0 && password.length() >0)
{
DBUserAdapter dbUser = new DBUserAdapter(LoginActivity.this);
dbUser.open();
int UID = dbUser.Login(username, password);
if(UID != -1)
{
// TEST
//int UID = dbUser.getUserID(username, password);
//getSitesByClientname(UID);
// END TEST
// MY TEST CODE TO CHANGE ACTIVITY TO CLIENT SITES
Intent myIntent = new Intent(LoginActivity.this, ClientSites.class);
//Intent myIntent = new Intent(getApplicationContext(), ClientSites.class);
myIntent.putExtra("userID", UID);
startActivity(myIntent);
//finish();
// END MY TEST CODE
//Cursor UserID = dbUser.getUserID();
Toast.makeText(LoginActivity.this,"Successfully Logged In", Toast.LENGTH_LONG).show();
}else{
Toast.makeText(LoginActivity.this,"Invalid Username/Password", Toast.LENGTH_LONG).show();
}
dbUser.close();
}
}catch(Exception e)
{
Toast.makeText(LoginActivity.this,e.getMessage(), Toast.LENGTH_LONG).show();
}
}
});
}
}
Method from DBHelper Class to return String Array
public String[] getSitesByClientname(String id) {
String[] args={id};
//return db.rawQuery("SELECT client_sitename FROM " + CLIENT_SITES_TABLE + " WHERE client_id=?", args);
Cursor myCursor = db.rawQuery("SELECT client_sitename FROM " + CLIENT_SITES_TABLE + " WHERE client_id=?", args);
// loop through all rows and adding to array
int count;
count = myCursor.getCount();
final String[] results = new String[count];
results[0] = new String();
int i = 0;
try{
if (myCursor.moveToFirst()) {
do {
results[i] = myCursor.getString(myCursor.getColumnIndex("client_sitename"));
} while (myCursor.moveToNext());
}
}finally{
myCursor.close();
}
db.close();
// return results array
return results;
ClientSites Class
public class ClientSites extends ListActivity {
public final static String ID_EXTRA="com.example.loginfromlocal._ID";
private DBUserAdapter dbHelper = null;
//private Cursor ourCursor = null;
private ArrayAdapter<String> adapter=null;
//#SuppressWarnings("deprecation")
#SuppressLint("NewApi")
public void onCreate(Bundle savedInstanceState) {
try
{
super.onCreate(savedInstanceState);
//setContentView(R.layout.client_sites);
Intent i = getIntent();
String uID = String.valueOf(i.getIntExtra("userID", 0));
//int uID = i.getIntExtra("userID", 0);
//ListView myListView = (ListView)findViewById(R.id.myListView);
dbHelper = new DBUserAdapter(this);
dbHelper.createDatabase();
//dbHelper.openDataBase();
dbHelper.open();
String[] results = dbHelper.getSitesByClientname(uID);
//setListAdapter(new ArrayAdapter<String>(ClientSites.this, R.id.myListView, results));
//adapter = new ArrayAdapter<String>(ClientSites.this, R.id.myListView, results);
setListAdapter(new ArrayAdapter<String>(ClientSites.this, R.layout.client_sites, results));
//ListView myListView = (ListView)findViewById(R.id.myListView);
ListView listView = getListView();
listView.setTextFilterEnabled(true);
//#SuppressWarnings("deprecation")
//SimpleCursorAdapter adapter = new SimpleCursorAdapter(getBaseContext(), R.id.myListView, null, null, null);
//CursorAdapter adapter = new SimpleCursorAdapter(this, R.id.myListView, null, null, null, 0);
//adapter = new Adapter(ourCursor);
//Toast.makeText(ClientSites.this, "Booo!!!", Toast.LENGTH_LONG).show();
//myListView.setAdapter(adapter);
//myListView.setOnItemClickListener(onListClick);
}
catch (Exception e)
{
Log.e("ERROR", "XXERROR IN CODE: " + e.toString());
e.printStackTrace();
}
}
}
Any help with this would be great, Thanks!

Create own project with few activities. Start working with sqlite database
Create new application. Create login activity and DB helper. Trying to upload dada from DB. Reseach and development
Here is an example how to work with SQLite DB.
public class DBHelper extends SQLiteOpenHelper {
private static DBHelper instance;
private static final String DATABASE_NAME = "UserClientBase";
private static final int DATABASE_VERSION = 1;
public static interface USER extends BaseColumns {
String TABLE_NAME = "userTable";
String NAME = "userName";
String PASSWORD = "userPassword";
}
public static interface CLIENT extends BaseColumns {
String TABLE_NAME = "clientTable";
String NAME = "clientName";
String USER_ID = "userId";
}
private static final String CREATE_TABLE = "CREATE TABLE IF NOT EXISTS ";
private static final String DROP_TABLE = "DROP TABLE IF EXISTS ";
private static final String UNIQUE = "UNIQUE ON CONFLICT ABORT";
private static final String CREATE_TABLE_USER = CREATE_TABLE + USER.TABLE_NAME + " (" + USER._ID
+ " INTEGER PRIMARY KEY, " + USER.NAME + " TEXT " + UNIQUE + ", " + USER.PASSWORD + " TEXT);";
private static final String CREATE_TABLE_CLIENT = CREATE_TABLE + CLIENT.TABLE_NAME + " (" + CLIENT._ID
+ " INTEGER PRIMARY KEY, " + CLIENT.NAME + " TEXT UNIQUE, " + CLIENT.USER_ID + " INTEGER);";
private DBHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
public static DBHelper getInstance(Context context) {
if (instance == null) {
instance = new DBHelper(context);
}
return instance;
}
#Override
public void onCreate(SQLiteDatabase db) {
db.execSQL(CREATE_TABLE_USER);
db.execSQL(CREATE_TABLE_CLIENT);
}
#Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
db.execSQL(DROP_TABLE + USER.TABLE_NAME);
db.execSQL(DROP_TABLE + CLIENT.TABLE_NAME);
onCreate(db);
}
public long createUser(String newUserName, String newUserPassword) {
ContentValues values = new ContentValues();
values.put(USER.NAME, newUserName);
values.put(USER.PASSWORD, newUserPassword);
return getWritableDatabase().insert(USER.TABLE_NAME, null, values);
}
public long createClient(long userId, String newClientName) {
ContentValues values = new ContentValues();
values.put(CLIENT.USER_ID, userId);
values.put(CLIENT.NAME, newClientName);
return getWritableDatabase().insert(CLIENT.TABLE_NAME, null, values);
}
public boolean isCorrectLoginPassword(String login, String password) {
Cursor userListCursor = getReadableDatabase().rawQuery(
"SELECT * FROM " + USER.TABLE_NAME + " WHERE " + USER.NAME + " =? AND " + USER.PASSWORD
+ " =?", new String[] { login, password });
if ((userListCursor != null) && (userListCursor.getCount() > 0)) {
return true;
} else {
return false;
}
}
public Cursor getUserClientList(String userName) {
Cursor userClientList = getReadableDatabase().rawQuery(
"SELECT * FROM " + CLIENT.TABLE_NAME + " INNER JOIN " + USER.TABLE_NAME
+ " ON " + CLIENT.USER_ID + " = " + USER.TABLE_NAME + "." + USER._ID + " WHERE "
+ USER.NAME + " =?", new String[] { userName });
return userClientList;
}
}
Example of login button click listener.
String login = loginEdt.getText().toString();
String password = passwordEdt.getText().toString();
boolean loginSuccess = databaseHelper.isCorrectLoginPassword(login, password);
if(loginSuccess) {
Intent clientListIntent = new Intent(LoginActivity.this, ClientListActivity.class);
clientListIntent.putExtra(ClientListActivity.EXTRAS_LOGIN, login);
startActivity(clientListIntent);
} else {
Toast.makeText(LoginActivity.this, "Incorrect login/password", Toast.LENGTH_SHORT).show();
}
And example of listview with data from sql:
clientLv= (ListView)findViewById(R.id.listClient);
login = getIntent().getExtras().getString(EXTRAS_LOGIN);
dbHelper = DBHelper.getInstance(this);
Cursor clientList = dbHelper.getUserClientList(login);
adapter = new SimpleCursorAdapter(this, R.layout.row_client, clientList, new String[]{DBHelper.CLIENT.NAME}, new int[]{R.id.txtClientName} , SimpleCursorAdapter.FLAG_REGISTER_CONTENT_OBSERVER);
clientLv.setAdapter(adapter);

Related

how to add another column in another spinner of same or other table in android studio

how to add second column value of same or other table in another spinner from sqlite database using button click in android studio
retrievebtn.setOnClickListener(arg0 -> {
// TODO Auto-generated method stub
nos.clear();
names.clear();
//OPEN
db.openDB();
//RETRIEVE
Cursor c = db.getAllValues();
c.moveToFirst();
while(!c.isAfterLast())
{
String no = c.getString(0);
nos.add(no);
String name = c.getString(1);
names.add(name);
c.moveToNext();
}
//CLOSE
c.close();
db.close();
//SET IT TO SPINNER
sp1.setAdapter(adapter);
sp2.setAdapter(adapter);
});

Perhaps consider the following working example.
This consists of 2 spinners and 3 buttons. The buttons controlling from which of the 3 tables the data is extracted for the 2nd spinner.
The trick, as such, used is to use AS to utilise a standard column name, irrespective of the actual column name. The one difference is that this rather than using a normal adapter, it utilises a CursorAdapter (SimpleCursorAdapter as it's quite flexible) and thus you can extract the data directly.
First the SQLite side i.e. the class that extends SQLiteOpenHelper :-
class DBHelper extends SQLiteOpenHelper {
public static final String DATABASE_NAME = "the_database.db";
public static final int DATABASE_VERSION = 1;
public static final String TABLE1_TABLE = "_table1";
public static final String TABLE1_ID_COL = BaseColumns._ID;
public static final String TABLE1_NAME_COL = "_name";
public static final String TABLE1_DESC_COL = "_desc";
private static final String TABLE1_CREATE_SQL =
"CREATE TABLE IF NOT EXISTS " + TABLE1_TABLE + "(" +
TABLE1_ID_COL + " INTEGER PRIMARY KEY" +
"," + TABLE1_NAME_COL + " TEXT UNIQUE" +
"," + TABLE1_DESC_COL + " TEXT " +
");";
public static final String TABLE2_TABLE = "_table2";
public static final String TABLE2_ID_COL = BaseColumns._ID;
public static final String TABLE2_TABLE1_ID_MAP_COL = "_table1_id_map";
public static final String TABLE2_NAME_COL = "_name";
private static final String TABLE2_CREATE_SQL =
"CREATE TABLE IF NOT EXISTS " + TABLE2_TABLE + "(" +
TABLE2_ID_COL + " INTEGER PRIMARY KEY" +
"," + TABLE2_TABLE1_ID_MAP_COL + " INTEGER " +
"," + TABLE2_NAME_COL + " TEXT" +
");";
public static final String TABLE3_TABLE = "_table3";
public static final String TABLE3_ID_COL = BaseColumns._ID;
public static final String TABLE3_TABLE2_ID_MAP_COL = "_table2_id_map";
public static final String TABLE3_NAME_COL = "_name";
private static final String TABLE3_CREATE_SQL =
"CREATE TABLE IF NOT EXISTS " + TABLE3_TABLE +"(" +
TABLE3_ID_COL + " INTEGER PRIMARY KEY" +
"," + TABLE3_TABLE2_ID_MAP_COL + " INTEGER " +
"," + TABLE3_NAME_COL + " TEXT " +
");";
private static volatile DBHelper INSTANCE;
private SQLiteDatabase db;
public static final String SPINNER_COLUMN1 = "_spc1";
public static final String SPINNER_COLUMN2 = "_spc2";
private DBHelper(Context context) {
super(context,DATABASE_NAME,null,DATABASE_VERSION);
db = this.getWritableDatabase();
}
public static DBHelper getInstance(Context context) {
if (INSTANCE==null) {
INSTANCE = new DBHelper(context);
}
return INSTANCE;
}
#Override
public void onCreate(SQLiteDatabase db) {
db.execSQL(TABLE1_CREATE_SQL);
db.execSQL(TABLE2_CREATE_SQL);
db.execSQL(TABLE3_CREATE_SQL);
}
#Override
public void onUpgrade(SQLiteDatabase db, int i, int i1) {
}
public long insertTable1Row(String name,String description) {
ContentValues cv = new ContentValues();
cv.put(TABLE1_NAME_COL,name);
cv.put(TABLE1_DESC_COL,description);
return db.insert(TABLE1_TABLE,null,cv);
}
public long insertTable2Row(String name, long table1_id) {
ContentValues cv = new ContentValues();
cv.put(TABLE2_NAME_COL,name);
cv.put(TABLE2_TABLE1_ID_MAP_COL,table1_id);
return db.insert(TABLE2_TABLE,null,cv);
}
public long insertTable3Row(String name, long table2_id) {
ContentValues cv = new ContentValues();
cv.put(TABLE3_NAME_COL,name);
cv.put(TABLE3_TABLE2_ID_MAP_COL,table2_id);
return db.insert(TABLE3_TABLE,null,cv);
}
public Cursor getSpinnerData(String table, long map) {
String[] columns = new String[]{};
String whereClause = "";
String[] whereArgs = new String[]{String.valueOf(map)};
switch (table) {
case TABLE1_TABLE:
columns = new String[]{TABLE1_ID_COL,TABLE1_NAME_COL + " AS " + SPINNER_COLUMN1,TABLE1_DESC_COL + " AS " + SPINNER_COLUMN2};
whereClause = "";
break;
case TABLE2_TABLE:
columns = new String[]{TABLE2_ID_COL ,TABLE2_NAME_COL + " AS " + SPINNER_COLUMN1,"'-' AS " + SPINNER_COLUMN2};
whereClause = TABLE2_TABLE1_ID_MAP_COL + "=?";
break;
case TABLE3_TABLE:
columns = new String[]{TABLE3_ID_COL, TABLE3_NAME_COL + " AS " + SPINNER_COLUMN1,"'~' AS " + SPINNER_COLUMN2};
whereClause = TABLE3_TABLE2_ID_MAP_COL + "=?";
break;
}
if (map < 0) {
whereClause="";
whereArgs = new String[]{};
}
if (columns.length > 0) {
return db.query(table,columns,whereClause,whereArgs,null,null,null);
} else {
return db.query(TABLE1_TABLE,new String[]{"0 AS " + TABLE1_ID_COL + ",'ooops' AS " + SPINNER_COLUMN1,"'ooops' AS " + SPINNER_COLUMN2},null,null,null,null,null,"1");
}
}
}
as said there are three tables
a singleton approach has been utilised for the DBHelper
the most relevant aspect in regards to switching spinner data is the getSpinnerData function, which takes two parameters, the most relevant being the first the tablename which drives the resultant query.
Note the use of BaseColumns._ID ALL Cursor adapters must have a column name _id (which is what BaseColumns._ID resolves to). The column should be an integer value that uniquely identifies the row.
the 2nd parameter caters for the selection of only related data, but a negative is used to ignore this aspect.
The Activity "MainActivity" used to demonstrate is :-
public class MainActivity extends AppCompatActivity {
Button btn1, btn2, btn3;
Spinner sp1,sp2;
String[] spinnerColumns = new String[]{DBHelper.SPINNER_COLUMN1,DBHelper.SPINNER_COLUMN2};
SimpleCursorAdapter sca1,sca2;
String sp1_table_name = DBHelper.TABLE1_TABLE;
String sp2_table_name = DBHelper.TABLE2_TABLE;
Cursor csr1, csr2;
DBHelper dbHelper;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn1 = this.findViewById(R.id.button1);
btn2 = this.findViewById(R.id.button2);
btn3 = this.findViewById(R.id.button3);
sp1 = this.findViewById(R.id.spinner1);
sp2 = this.findViewById(R.id.spinner2);
dbHelper = DBHelper.getInstance(this);
Cursor test4Data = dbHelper.getWritableDatabase().query(DBHelper.TABLE1_TABLE,null,null,null,null,null,null, "1");
if (test4Data.getCount() < 1) {
addSomeData();
}
test4Data.close();
sp1_table_name = DBHelper.TABLE1_TABLE;
sp2_table_name = DBHelper.TABLE2_TABLE;
setUpButtons();
setOrRefreshSpinner1();
setOrRefreshSpinner2();
}
void setUpButtons() {
btn1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
sp2_table_name = DBHelper.TABLE1_TABLE;
setOrRefreshSpinner2();
setOrRefreshSpinner1();
}
});
btn2.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
sp2_table_name = DBHelper.TABLE2_TABLE;
setOrRefreshSpinner2();
setOrRefreshSpinner1();
}
});
btn3.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
sp2_table_name = DBHelper.TABLE3_TABLE;
setOrRefreshSpinner2();
setOrRefreshSpinner1();
}
});
}
void setOrRefreshSpinner1() {
csr1 = dbHelper.getSpinnerData(sp1_table_name,-1);
if (sca1==null) {
sca1 = new SimpleCursorAdapter(
this,
android.R.layout.simple_list_item_2,
csr1,
spinnerColumns,
new int[]{android.R.id.text1, android.R.id.text2},0
);
sp1.setAdapter(sca1);
} else {
sca1.swapCursor(csr1);
}
}
void setOrRefreshSpinner2() {
csr2 = dbHelper.getSpinnerData(sp2_table_name,-1);
if (sca2==null) {
sca2 = new SimpleCursorAdapter(
this,
android.R.layout.simple_list_item_2,
csr2,
spinnerColumns,
new int[]{android.R.id.text1, android.R.id.text2},0
);
sp2.setAdapter(sca2);
} else {
sca2.swapCursor(csr2);
}
}
private void addSomeData() {
long n1 = dbHelper.insertTable1Row("NAME001","The first name.");
long n2 = dbHelper.insertTable1Row("NAME002","The second name.");
long n3 = dbHelper.insertTable1Row("NAME003","The third name");
long t2n1 = dbHelper.insertTable2Row("CHILDNAME001",n1);
long t2n2 = dbHelper.insertTable2Row("CHILDNAME002",n2);
long t2n3 = dbHelper.insertTable2Row("CHILDNAME003", n3);
dbHelper.insertTable3Row("GRANDCHILDNAME001",t2n1);
dbHelper.insertTable3Row("GRANDCHILDNAME002",t2n1);
dbHelper.insertTable3Row("GRANDCHILDNAME003",t2n1);
dbHelper.insertTable3Row("GRANDCHILDNAME004",t2n2);
dbHelper.insertTable3Row("GRANDCHILDNAME005",t2n3);
}
}
Result
The above when run starts of with :-
With the first spinner dropdown shown :-
With the second spinner dropdown shown :-
If Button1 is clicked then both spinners (i.e. spinner2 has been changed to select data from Table1 rather than Table2) show data from Table1 (useless but for demonstration) :-
If Button3 is clicked then data from Table3 is displayed in the second spinner:-
Clicking Button2 shows data from Table2.
Of course the principle could be applied in many different ways.

My adapters were not set so I made below changes and got expected result.
// RETRIEVE
retrievebtn.setOnClickListener(arg0 -> {
// TODO Auto-generated method stub
nos.clear();
names.clear();
//OPEN
db.openDB();
//RETRIEVE
Cursor c = db.getAllValues();
c.moveToFirst();
while(!c.isAfterLast())
{
String no = c.getString(0);
nos.add(no);
String name = c.getString(1);
names.add(name);
c.moveToNext();
}
//CLOSE
c.close();
db.close();
//SET IT TO SPINNER
ArrayAdapter<String> adapter1 = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, nos);
ArrayAdapter<String> adapter2 = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, names);
sp1.setAdapter(adapter1);
sp2.setAdapter(adapter2);
});

sqlite database return on a null object reference

I am new in android. I have an app and when I click on the send button I get an error in the app:
SQLiteDatabase.execSQL(java.lang.String,java.lang.object)on a null object reference.
This is my Database code :
public class MyDatabase extends SQLiteOpenHelper {
public static final String DATABASE_NAME = "contact_db" ;
public static final String TABLE_NAME = "contact_msg" ;
public static final String COL_1 = "id" ;
public static final String COL_2 = "phoneNumber" ;
public static final String COL_3 = "text" ;
static SQLiteDatabase mDatabase;
public MyDatabase(#Nullable Context context) {
super(context, DATABASE_NAME, null,1);
}
#Override
public void onCreate(SQLiteDatabase mDatabase) {
mDatabase.execSQL("CREATE TABLE " + TABLE_NAME + " ( " +COL_1+ " INTEGEER PRIMARY KEY AUTOINCREMENT ," + COL_2 + "VARCHAR, "
+COL_3+ "VARCHAR )");
// mDatabase = openOrCreateDatabase(DATABASE_NAME, MODE_PRIVATE, null);
}
#Override
public void onUpgrade(SQLiteDatabase mDatabase, int i, int i1) {
mDatabase.execSQL("DROP TABLE IF EXISTS "+TABLE_NAME);
onCreate(mDatabase);
}
public static void addContacts(String phoneNumber, String text, Context context){
if (phoneNumber.isEmpty()){
// phoneEditText.setError("phoneNumber can not be empty...");
// phoneEditText.requestFocus();
return;
}
String sql = " INSERT INTO contact_msg(phoneNumber, text)" +
"VALUES (?, ?)";
mDatabase.execSQL(sql, new String []{phoneNumber, text});
Toast.makeText(context,"contacts addedddddd",Toast.LENGTH_SHORT).show();
}
}
and this is my SendActivity code :
public class SendActivity extends AppCompatActivity {
// define channel
private static final String ChANNEL_ID = "simplified_coding";
private static final String CHANNEL_NAME = "Simplified Coding";
private static final String ChANNEL_DESC = "Simplified Coding Notification";
Button sendBtn;
Button sendBtn2;
EditText phoneEditText;
EditText plainEditText;
MyDatabase MyDb;
// static TextView cipherTextView;
// static TextView receivedTextview;
static String pubKey="MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCJoBRPFYZb19vXqpiHzo2gPTq0" +
"D1Ey++4PohVNboTBfsscUYA8SMPX4/Jz0NmhDbtk1PL3rqOVKubcEyJumxA+l46B" +
"gNoQsnOBqXfE5Voo0GTbgP4AeN6MnkJ8mhawj3vu2TGmQqtlFYRyYbp6MZ6Q7ops" +
"kZBKULJJJSwC9qSpewIDAQAB";
static String privKey="MIICXAIBAAKBgQCJoBRPFYZb19vXqpiHzo2gPTq0D1Ey++4PohVNboTBfsscUYA8" +
"SMPX4/Jz0NmhDbtk1PL3rqOVKubcEyJumxA+l46BgNoQsnOBqXfE5Voo0GTbgP4A" +
"eN6MnkJ8mhawj3vu2TGmQqtlFYRyYbp6MZ6Q7opskZBKULJJJSwC9qSpewIDAQAB" +
"AoGATMqdimMgTS7s5DG0WlLOg5KmpsHFNQWNl/uAl2wLd0wgWPTA8OJJJLV0G1t1" +
"k3/uCB0qVTmE3T7LAhFLLRwou2wZbw3w48jF4uTXQJex6cf1xHVkXy6jBUVLlddW" +
"74MQv3pfBRs/s0NsYML4J713r55JNmTU26WDwLA2xPNiosECQQDxAQQb7i1ZmSnr" +
"9h0J6Ss3SGqpqDr/RRvUjSmCaCZtP/YFyNEd1aseQ8Wc31PpouwFgJbFYPEOAw+n" +
"h2UECEiHAkEAkjBUvSFOFNnQIeiq1TUN/piEehSa8inLdU1psroVr09GprpS6nGZ" +
"df66Nv0DhMCw6N1VjywnLNi8ru5zpg34bQJBAIXZWJzihRFT/XJtd+c/Np83evXK" +
"1ylbCn/b/ofMrDrU4SCJTYrSVn0yipf7eLEzqP3NUu9ATeDIVnNmwPWiXBUCQGCL" +
"PJs+8IMCqdqK/q8Zf6mA7hR1oTKGeZB5VHGtRP7m+wDHElU0OqXbWP1RsM4uN2dC" +
"LOwFu8V5SXq5jXS/yy0CQCpkkZ6YEHxcKJGptVyAtC5iYNCun0pYNjrJHflu6ia8" +
"pvX7FcJBo2l2Kmld6gXDlYnlJpyOSTapMDjSEs/DNr8=";
// public static final String DATABASE_NAME = "contact_db" ;
static SQLiteDatabase mDatabase;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_send );
getWindow().getDecorView().setBackgroundColor(Color.rgb(249, 247, 209));
MyDb = new MyDatabase(this);
// Database Code
mDatabase = openOrCreateDatabase(DATABASE_NAME, MODE_PRIVATE, null);
// CREATE_TABLE();
// handel android8 for channel
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
NotificationChannel channel = new NotificationChannel(ChANNEL_ID, CHANNEL_NAME, NotificationManager.IMPORTANCE_DEFAULT);
channel.setDescription(ChANNEL_DESC);
NotificationManager notificationManager = getSystemService(NotificationManager.class);
notificationManager.createNotificationChannel(channel);
}
Typeface face = Typeface.createFromAsset(getAssets(),
"fonts/BRoya.ttf");
phoneEditText = (EditText) findViewById(R.id.editTextPhoneNumber);
plainEditText = (EditText) findViewById(R.id.editTextContent);
// cipherTextView = (TextView) findViewById(R.id.textViewCipherText);
// receivedTextview = (TextView) findViewById(R.id.textViewReceivedText);
sendBtn = (Button) findViewById(R.id.buttonSendSMS);
sendBtn2 = (Button) findViewById(R.id.buttonSendContacts);
phoneEditText.setTypeface(face);
plainEditText.setTypeface(face);
// receivedTextview.setTypeface(face);
// sendBtn.setTypeface(face);
}
public void gotoMessage(View view){
switch (view.getId()) {
case R.id.buttonSendContacts:
startActivity(new Intent(this, MessageActivity .class));
break;
}
}
public void sendSMS(View V){
try {
String phoneNumber = phoneEditText.getText().toString();
String plainText = plainEditText.getText().toString();
String cipherText = encryptBeforeSend(plainText);
// String decodedText = decryptAfterReceive(cipherText);
// decodedText += "!!";
// cipherTextView.setText(cipherText);
// receivedTextview.setText(decodedText);
if (ContextCompat.checkSelfPermission(SendActivity.this, Manifest.permission.SEND_SMS) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(SendActivity.this, new String[]{Manifest.permission.SEND_SMS}, 1);
} else {
SmsManager smsManager = SmsManager.getDefault();
ArrayList<String> msgArray = smsManager.divideMessage(cipherText);
smsManager.sendMultipartTextMessage(phoneNumber, null, msgArray, null, null);
Toast.makeText(getApplicationContext(),
"SMS sent!",
Toast.LENGTH_LONG).show();
MyDb.addContacts(phoneNumber, plainText, this);
}
}
catch (Exception e) {
Toast.makeText(getApplicationContext(),
"SMS faild, please try again later!"+e.toString(),
Toast.LENGTH_LONG).show();
e.printStackTrace();
}
}
public String encryptBeforeSend(String inputString) {
// encrypt
byte[] userData = inputString.getBytes();
try {
byte[] encodeData = myRSA.encryptByPublicKey(userData, pubKey);
// String encodeStr = new BigInteger(1, encodeData).toString(16);
String encodeStr = Base64.encodeToString(encodeData, Base64.DEFAULT);
return encodeStr;
}
catch (Exception ex){
ex.printStackTrace();
return ex.toString();
}
}
}
When I call the sendSMS function I get the database null object reference error and when I call the gotoMessage function the app does crash and I know that the cause of the crash is the database.
Can anybody help me?

First of all, the string passed in your mDatabase.execSQL() inside onCreate() is not a valid db query due to typo (INTEGEER) and wrong spacing during string concatenation. It should be:
#Override
public void onCreate(SQLiteDatabase mDatabase) {
mDatabase.execSQL("CREATE TABLE " + TABLE_NAME + " (" + COL_1 + " INTEGER PRIMARY KEY, " + COL_2 + " VARCHAR, " + COL_3 + " VARCHAR)");
}
Possibly the database table won't be created otherwise.
Next, as stated in the official documentation,
getWritableDatabase() is used to create and/or open a database that will be used for reading and writing.
Also, according to the documentation,
execSQL() executes a single SQL statement that is NOT a SELECT/INSERT/UPDATE/DELETE. For INSERT statements, use any of the following instead.
insert(java.lang.String, java.lang.String, android.content.ContentValues)
insertOrThrow(java.lang.String, java.lang.String, android.content.ContentValues)
insertWithOnConflict(java.lang.String, java.lang.String, android.content.ContentValues, int)
So, your addContacts() method should be like this:
public void addContacts(String phoneNumber, String text, Context context) {
if (phoneNumber.isEmpty())
return;
SQLiteDatabase mDatabase = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put("phoneNumber", phoneNumber);
values.put("text", text);
mDatabase.insert("contact_msg", null, values);
mDatabase.close();
Toast.makeText(context, "contacts added", Toast.LENGTH_SHORT).show();
}

Couldn't read row 0, col -1 from CursorWindow Displaying Records

Good day, I was trying to retrieved my data's and display them in a simple way.
Here's my sample code: SQLiteLocalDatabase .java
public class SQLiteLocalDatabase extends SQLiteOpenHelper{
private SQLiteDatabase sqLiteDatabase;
private static final String DB_NAME = "project.db";
private static final int VERSION = 1;
public static final String DB_TABLE = " user ";
public static final String ID = " _id ";
public static final String FULL_NAME = " fullname ";
public static final String LOCATION = " location ";
public static final String EMAIL_ADD = " email ";
public static final String PASSWORD = " password ";
public SQLiteLocalDatabase(Context context) {
super(context, DB_NAME, null, VERSION);
}
#Override
public void onCreate(SQLiteDatabase db) {
String queryTable = " CREATE TABLE " + DB_TABLE + "( " + ID + " INTEGER PRIMARY KEY AUTOINCREMENT, "+ FULL_NAME + " TEXT , " + LOCATION + " TEXT NOT NULL, " + EMAIL_ADD + " TEXT , " + PASSWORD + " TEXT " + " ) ";
//setUpDb();
db.execSQL(queryTable);
}
public void setUpDb(){
//TO OPEN DATABASE - RE-WRITABLE
sqLiteDatabase = getWritableDatabase();
}
public void closeTransactionDb(){
//CLOSE DB IF OPEN
if(sqLiteDatabase != null && sqLiteDatabase.isOpen()){
sqLiteDatabase.close();
}
}
//INSERT DATA
public long insert(int id,String fullname, String location,String email,String password){
//CONTENT VALUE contains name-value-pairs
ContentValues values = new ContentValues();
if(id != -1) {
values.put(ID,id);
values.put(FULL_NAME, fullname);
values.put(LOCATION, location);
values.put(EMAIL_ADD, email);
values.put(PASSWORD, password);
}
//Object Table, column, values
return sqLiteDatabase.insert(DB_TABLE, null, values);
}
//UPDATE
public long update(int id, String fullname,String location,String email, String password){
//CONTENT VALUE contains name-value-pairs
ContentValues values = new ContentValues();
values.put(FULL_NAME,fullname);
values.put(LOCATION,location);
values.put(EMAIL_ADD,email);
values.put(PASSWORD,password);
//WHERE
String where = ID + " = " +id;
//Object Table, values, destination-id
return sqLiteDatabase.update(DB_TABLE, values, where, null);
}
//DELETE
//
public long delete(int id){
//WHERE
String where = ID + " = " +id;
//Object Table, values, destination-id
return sqLiteDatabase.delete(DB_TABLE, where, null);
}
public Cursor getAllRecords(){
String queryDB = "SELECT * FROM " + DB_TABLE;
return sqLiteDatabase.rawQuery(queryDB, null);
}
public Cursor getSingleRecord(){
String querySingleRecord = "SELECT * FROM " + DB_TABLE + "WHERE _id = " +ID;
return sqLiteDatabase.rawQuery(querySingleRecord,null);
}
#Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
}
For my main: AddItemsActivity .java
public class AddItemsActivity extends AppCompatActivity implements View.OnClickListener{
SQLiteLocalDatabase sqLiteLocalDatabase;
TextView textViewDbData;
EditText editTextFullName;
EditText editTextAddress;
EditText editTextEmailAdd;
EditText editTextPassword;
EditText editTextIDNO;
Button btnSave;
Button btnUpdate;
Button btnSearch;
Button btnDelete;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_add_items);
sqLiteLocalDatabase = new SQLiteLocalDatabase(AddItemsActivity.this);
//CALL FUNCTION
setUpWidgets();
}
public void setUpWidgets(){
textViewDbData = (TextView) findViewById(R.id.textViewDbData);
editTextFullName = (EditText) findViewById(R.id.editTextViewAddFullName);
editTextAddress = (EditText) findViewById(R.id.editTextAddLocation);
editTextEmailAdd = (EditText) findViewById(R.id.editTextAddEmailAddress);
editTextPassword = (EditText) findViewById(R.id.editTextRegPassword);
editTextIDNO = (EditText) findViewById(R.id.editTextAddID);
btnSave = (Button) findViewById(R.id.buttonAddContacts);
btnSave.setOnClickListener(this);
btnUpdate = (Button) findViewById(R.id.buttonUpdate);
btnUpdate.setOnClickListener(this);
btnSearch = (Button) findViewById(R.id.buttonDeleteRecord);
btnSearch.setOnClickListener(this);
btnDelete = (Button) findViewById(R.id.buttonShowRecords);
btnDelete.setOnClickListener(this);
}
public void clearTextFields(){
editTextFullName.setText("");
editTextAddress.setText("");
editTextEmailAdd.setText("");
editTextPassword.setText("");
editTextIDNO.setText("");
}
#Override
public void onClick(View v) {
String fullName = editTextFullName.getText().toString().trim();
String location = editTextAddress.getText().toString().trim();
String emailAdd = editTextEmailAdd.getText().toString().trim();
String password = editTextPassword.getText().toString().trim();
switch (v.getId()){
case R.id.buttonAddContacts:
//IF result == -1
long result = sqLiteLocalDatabase.insert(Integer.parseInt(getValue(editTextIDNO)), fullName, location, emailAdd, password);
if(result == -1){
Toast.makeText(AddItemsActivity.this, "Error: Someone own that Id",Toast.LENGTH_LONG).show();
}else
{
Toast.makeText(AddItemsActivity.this, "Success Id: " +result,Toast.LENGTH_LONG).show();
clearTextFields();
}
break;
case R.id.buttonUpdate:
if(editTextIDNO.getText().equals("")){
Toast.makeText(AddItemsActivity.this, "Please Enter User ID ",Toast.LENGTH_LONG).show();
}
else {
long update = sqLiteLocalDatabase.update(Integer.parseInt(getValue(editTextIDNO)),
getValue(editTextFullName),
getValue(editTextAddress),
getValue(editTextEmailAdd),
getValue(editTextPassword)
);
if (update == 0) {
Toast.makeText(AddItemsActivity.this, "Error Updating ", Toast.LENGTH_LONG).show();
} else if (update == -1) {
Toast.makeText(AddItemsActivity.this, "Successfully Modified", Toast.LENGTH_LONG).show();
clearTextFields();
} else {
Toast.makeText(AddItemsActivity.this, "Error All data updated Id: " + update, Toast.LENGTH_LONG).show();
}
}
break;
case R.id.buttonDeleteRecord:
long delete = sqLiteLocalDatabase.delete(Integer.parseInt(getValue(editTextIDNO)));
if(delete == 0) {
Toast.makeText(AddItemsActivity.this, "Error Delete", Toast.LENGTH_LONG).show();
} else
{
Toast.makeText(AddItemsActivity.this, "Success Delete", Toast.LENGTH_LONG).show();
clearTextFields();
}
break;
case R.id.buttonShowRecords:
StringBuffer finalData = new StringBuffer();
Cursor cursor = sqLiteLocalDatabase.getAllRecords();
for (cursor.moveToFirst(); !cursor.isAfterLast(); cursor.moveToNext() ){
finalData.append(cursor.getLong(cursor.getColumnIndex(sqLiteLocalDatabase.ID)));
finalData.append(" - ");
finalData.append(cursor.getString(cursor.getColumnIndex(sqLiteLocalDatabase.FULL_NAME)));
finalData.append(" - ");
finalData.append(cursor.getString(cursor.getColumnIndex(sqLiteLocalDatabase.LOCATION)));
finalData.append(" - ");
finalData.append(cursor.getInt(cursor.getColumnIndex(sqLiteLocalDatabase.EMAIL_ADD)));
finalData.append(" - ");
finalData.append(cursor.getInt(cursor.getColumnIndex(sqLiteLocalDatabase.PASSWORD)));
finalData.append("\n");
}
textViewDbData.setText(finalData);
break;
}
}
public String getValue(EditText editText){
return editText.getText().toString().trim();
}
#Override
protected void onStart() {
super.onStart();
sqLiteLocalDatabase.setUpDb();
}
#Override
protected void onStop() {
super.onStop();
sqLiteLocalDatabase.closeTransactionDb();
}
My problem was with the getAllRecords in the append part.
Logcat:

This is because one of the method of getting column index like cursor.getColumnIndex(sqLiteLocalDatabase.ID) returns -1.
Make sure the Cursor contains all the columns you are retrieving and check if getColumnIndex method is not returning -1.
if(cursor.getColumnIndex(sqLiteLocalDatabase.ID) != -1) {
finalData.append(cursor.getLong(cursor.getColumnIndex(sqLiteLocalDatabase.ID)));
finalData.append(" - ");
}
Likewise check all conditions.
Hope it'll work.

How to update a specific row in SQLite?

Im trying to update a users current credits, but I don't want to replace the value, just add on a selected amount from the spinner and add it on to the the users current credits? Thank you.
My database code?
package com.example.parkangel;
public class UDbHelper extends SQLiteOpenHelper
{
public static final String KEY_ROWID = "_id";
public static final String KEY_PFNAME = "payeeFname";
public static final String KEY_PSNAME = "payeeSname";
public static final String KEY_CARD = "card";
public static final String KEY_CREDITS = "credits";
private static final String DATABASE_NAME = "UserData.db";
private static final String DATABASE_TABLE = "UserTable";
private static final int DATABASE_VERSION = 1;
//private UDbHelper dbHelper;
//private final Context ourContext;
private static UDbHelper instance;
private SQLiteDatabase ourDatabase;
public UDbHelper(Context context)
{
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
public static UDbHelper getInstance(Context context)
{
if (instance == null)
{
instance = new UDbHelper(context);
}
return instance;
}
#Override
public void onCreate(SQLiteDatabase db)
{
// TODO Auto-generated method stub
db.execSQL("CREATE TABLE " + DATABASE_TABLE + " (" +
KEY_ROWID + " INTEGER PRIMARY KEY AUTOINCREMENT, " +
KEY_PFNAME + " TEXT NOT NULL, " + KEY_PSNAME + "
TEXT NOT NULL, " +
KEY_CARD + " INTEGER NOT NULL, " + KEY_CREDITS + "
INTEGER NOT NULL);");
ContentValues values = new ContentValues();
values.put(KEY_PFNAME, "Tutku");
values.put(KEY_PSNAME, "Erbil");
values.put(KEY_CARD, "12345677");
values.put(KEY_CREDITS, 5);
db.insert(DATABASE_TABLE, null, values);
}
#Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion)
{
// TODO Auto-generated method stub
db.execSQL("DROP TABLE IF EXISTS " + DATABASE_TABLE);
onCreate(db);
}
public synchronized UDbHelper open() throws SQLException
{
System.out.println ("running open");
if(ourDatabase == null || !ourDatabase.isOpen())
ourDatabase = getWritableDatabase();
return this;
}
public String getData()
{
// TODO Auto-generated method stub
String[] columns = new String[] {KEY_ROWID, KEY_PFNAME, KEY_PSNAME,
KEY_CARD, KEY_CREDITS};
Cursor c = ourDatabase.query(DATABASE_TABLE, columns, null, null,
null, null, null);
String result = " ";
int iRow = c.getColumnIndexOrThrow(KEY_ROWID);
int iPFname = c.getColumnIndexOrThrow(KEY_PFNAME);
int iPSname = c.getColumnIndexOrThrow(KEY_PSNAME);
int iCard = c.getColumnIndexOrThrow(KEY_CARD);
int iCredits = c.getColumnIndexOrThrow(KEY_CREDITS);
for(c.moveToFirst(); !c.isAfterLast(); c.moveToNext()){
result = result + c.getString(iRow) + " " +
c.getString(iPFname) + " " +
c.getString(iPSname) + " " + c.getString(iCard) + " " +
c.getString(iCredits) + "\n";
}
return result;
}
public void upDateUser(String money) {
// TODO Auto-generated method stub
ContentValues cvUpdate = new ContentValues();
cvUpdate.put(KEY_CREDITS, money);
ourDatabase.update(DATABASE_TABLE, cvUpdate, null, null);
}
}
Class that needs to perform the actoin:
package com.example.parkangel;
public class Balance extends Activity implements OnClickListener{
Button add;
TextView display;
Spinner spinner3;
Integer[] money = new Integer[] {1, 2, 5, 10};
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.balance_layout);
TextView tv = (TextView) findViewById(R.id.firstn);
UDbHelper db = new UDbHelper(this);
db.open();
String data = db.getData();
//db.addUser();
db.close();
tv.setText(data);
ArrayAdapter<Integer> adapter3 = new ArrayAdapter<Integer>(Balance.this,
android.R.layout.simple_spinner_item, money);
spinner3 = (Spinner) findViewById (R.id.moneytoadd);
spinner3.setAdapter(adapter3);
add = (Button) findViewById(R.id.topup);
add.setOnClickListener(this);
//add = (Button) findViewById(R.id.topup);
}
public void onClick(View arg0)
{
switch (arg0.getId()){
case R.id.topup:
boolean work = true;
try{
String money = spinner3.getContext().toString();
UDbHelper ud = new UDbHelper(this);
ud.open();
ud.upDateUser(money);
ud.close();
}catch (Exception e){
work = false;
String error = e.toString();
Dialog d = new Dialog(this);
d.setTitle("Unable To TopUp!");
TextView dg = new TextView(this);
dg.setText(error);
d.setContentView(dg);
d.show();
}finally{
if(work){
Dialog d = new Dialog(this);
d.setTitle("You Have ToppedUp!");
TextView dg = new TextView(this);
dg.setText("TopUp Successful");
d.setContentView(dg);
d.show();
}
}
break;
}
}
public void updateActivity(View view){
Intent book = new Intent(Balance.this, BookTicket.class);
startActivity(book);
}
public void addBalance(View view){
Intent addB = new Intent(Balance.this, Balance.class);
startActivity(addB);
}
public void doUpdate(View view){
Intent upd = new Intent(Balance.this, UpdateTicket.class);
startActivity(upd);
}
}

First of all you should have an ID that will let you find the user you are interested in. That do a select to get the current value that is stored in database. Parse the value to integer and add "new" money. And finally, update the value in database.
public void upDateUser(String ID, String money) {
String query = "Select money from TABLE_NAME where ID = " + ID;
SQLiteDatabase db = this.getWriteableDatabase();
Cursor cursor = db.rawQuery(selectQuery, null);
int oldMoney = 0;
if (cursor.moveToFirst()) {
oldMoney = Integer.parseInt(cursor.getString(0)); //Cause we get only from money column
}
ContentValues cvUpdate = new ContentValues();
cvUpdate.put(KEY_CREDITS, oldMoney + money);
String filter = "UID" + "=" + ID;
db.update(DATABASE_TABLE, cvUpdate, filter, null);
}
Of course you have to check if cursor returns exactly one row and do some other checks.

Can't add more than one record, ID not autoincrimenting

I'm trying to add site details to a database and then after I insert a row, output the result to a TextView. The record is being inserted into the database because it's being shown in a TextView, however I can only insert one record and I'm not sure why. I'm been using the tutorial here and modifying it to meet my needs.
Here is my DBAdapter:
public class DBAdapter {
// ///////////////////////////////////////////////////////////////////
// Constants & Data
// ///////////////////////////////////////////////////////////////////
// For logging:
private static final String TAG = "DBAdapter";
// DB Fields
public static final String KEY_ROWID = "_id";
public static final int COL_ROWID = 0;
/*
* CHANGE 1:
*/
// TODO: Setup your fields here:
public static final String KEY_NAME = "name";
public static final String KEY_ADDRESS = "address";
public static final String KEY_USERNAME = "username";
public static final String KEY_PASSWORD = "password";
public static final String KEY_PORT = "port";
// TODO: Setup your field numbers here (0 = KEY_ROWID, 1=...)
public static final int COL_NAME = 1;
public static final int COL_ADDRESS = 2;
public static final int COL_USERNAME = 3;
public static final int COL_PASSWORD = 4;
public static final int COL_PORT = 5;
public static final String[] ALL_KEYS = new String[] { KEY_ROWID, KEY_NAME,
KEY_ADDRESS, KEY_USERNAME, KEY_PASSWORD, KEY_PORT };
// DB info: it's name, and the table we are using (just one).
public static final String DATABASE_NAME = "Sites";
public static final String DATABASE_TABLE = "SiteTable";
// Track DB version if a new version of your app changes the format.
public static final int DATABASE_VERSION = 2;
private static final String DATABASE_CREATE_SQL = "create table "
+ DATABASE_TABLE
+ " ("
+ KEY_ROWID
+ " integer primary key autoincrement, "
/*
* CHANGE 2:
*/
// TODO: Place your fields here!
// + KEY_{...} + " {type} not null"
// - Key is the column name you created above.
// - {type} is one of: text, integer, real, blob
// (http://www.sqlite.org/datatype3.html)
// - "not null" means it is a required field (must be given a
// value).
// NOTE: All must be comma separated (end of line!) Last one must
// have NO comma!!
+ KEY_NAME + " string not null, " + KEY_ADDRESS
+ " string not null, " + KEY_USERNAME + " string not null, "
+ KEY_PASSWORD + " string not null, " + KEY_PORT
+ " integer not null"
// Rest of creation:
+ ");";
// Context of application who uses us.
private final Context context;
private DatabaseHelper myDBHelper;
private SQLiteDatabase db;
// ///////////////////////////////////////////////////////////////////
// Public methods:
// ///////////////////////////////////////////////////////////////////
public DBAdapter(Context ctx) {
this.context = ctx;
myDBHelper = new DatabaseHelper(context);
}
// Open the database connection.
public DBAdapter open() {
db = myDBHelper.getWritableDatabase();
return this;
}
// Close the database connection.
public void close() {
myDBHelper.close();
}
// Add a new set of values to the database.
public long insertRow(String name, String address, String username,
String password, int port) {
/*
* CHANGE 3:
*/
// TODO: Update data in the row with new fields.
// TODO: Also change the function's arguments to be what you need!
// Create row's data:
ContentValues initialValues = new ContentValues();
initialValues.put(KEY_NAME, name);
initialValues.put(KEY_ADDRESS, address);
initialValues.put(KEY_USERNAME, username);
initialValues.put(KEY_PASSWORD, password);
initialValues.put(KEY_PORT, port);
// Insert it into the database.
return db.insert(DATABASE_TABLE, null, initialValues);
}
// Delete a row from the database, by rowId (primary key)
public boolean deleteRow(long rowId) {
String where = KEY_ROWID + "=" + rowId;
return db.delete(DATABASE_TABLE, where, null) != 0;
}
public void deleteAll() {
Cursor c = getAllRows();
long rowId = c.getColumnIndexOrThrow(KEY_ROWID);
if (c.moveToFirst()) {
do {
deleteRow(c.getLong((int) rowId));
} while (c.moveToNext());
}
c.close();
}
// Return all data in the database.
public Cursor getAllRows() {
String where = null;
Cursor c = db.query(true, DATABASE_TABLE, ALL_KEYS, where, null, null,
null, null, null);
if (c != null) {
c.moveToFirst();
}
return c;
}
// Get a specific row (by rowId)
public Cursor getRow(long rowId) {
String where = KEY_ROWID + "=" + rowId;
Cursor c = db.query(true, DATABASE_TABLE, ALL_KEYS, where, null, null,
null, null, null);
if (c != null) {
c.moveToFirst();
}
return c;
}
// Change an existing row to be equal to new data.
public boolean updateRow(long rowId, String name, String address,
String username, String password, String port) {
String where = KEY_ROWID + "=" + rowId;
/*
* CHANGE 4:
*/
// TODO: Update data in the row with new fields.
// TODO: Also change the function's arguments to be what you need!
// Create row's data:
ContentValues newValues = new ContentValues();
newValues.put(KEY_NAME, name);
newValues.put(KEY_ADDRESS, address);
newValues.put(KEY_USERNAME, username);
// newValues.put(KEY_PASSWORD, password);
// newValues.put(KEY_PORT, port);
// Insert it into the database.
return db.update(DATABASE_TABLE, newValues, where, null) != 0;
}
// ///////////////////////////////////////////////////////////////////
// Private Helper Classes:
// ///////////////////////////////////////////////////////////////////
/**
* Private class which handles database creation and upgrading. Used to
* handle low-level database access.
*/
private static class DatabaseHelper extends SQLiteOpenHelper {
DatabaseHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
#Override
public void onCreate(SQLiteDatabase _db) {
_db.execSQL(DATABASE_CREATE_SQL);
}
#Override
public void onUpgrade(SQLiteDatabase _db, int oldVersion, int newVersion) {
Log.w(TAG, "Upgrading application's database from version "
+ oldVersion + " to " + newVersion
+ ", which will destroy all old data!");
// Destroy old database:
_db.execSQL("DROP TABLE IF EXISTS " + DATABASE_TABLE);
// Recreate new database:
onCreate(_db);
}
}
}
I'm querying the database here:
public class FTPConnector extends Activity {
DBAdapter myDb;
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.ftp);
status = (TextView) findViewById(R.id.status);
editAddress = (EditText) findViewById(R.id.editAddress);
editUser = (EditText) findViewById(R.id.editUsername);
editPassword = (EditText) findViewById(R.id.editPassword);
addsiteBtn = (Button) findViewById(R.id.addsiteBtn);
addsiteBtn.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
siteManager();
}
});
openDb();
}
private void openDb() {
myDb = new DBAdapter(this);
myDb.open();
}
#Override
protected void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
closeDb();
}
private void closeDb() {
myDb.close();
}
//Where the insertRecord() happens
public void siteManager() {
final AlertDialog customDialog = new AlertDialog.Builder(this).create();
LayoutInflater layoutInflater = (LayoutInflater) getApplicationContext()
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View view = layoutInflater.inflate(R.layout.site_manager, null);
final EditText tmpname = (EditText) view
.findViewById(R.id.dialogsitename);
final EditText tmpaddress = (EditText) view
.findViewById(R.id.dialogaddress);
final EditText tmpuser = (EditText) view
.findViewById(R.id.dialogusername);
final EditText tmppass = (EditText) view
.findViewById(R.id.dialogpassword);
final EditText tmpport = (EditText) view.findViewById(R.id.dialogport);
final TextView tmpsites = (TextView) view.findViewById(R.id.textView6);
final CheckBox tmppassive = (CheckBox) view
.findViewById(R.id.dialogpassive);
final Button tmpclose = (Button) view.findViewById(R.id.closeBtn);
final Button tmptestBtn = (Button) view.findViewById(R.id.testBtn);
final Button tmpsavetsite = (Button) view.findViewById(R.id.saveSite);
customDialog.setView(tmpclose);
customDialog.setView(tmptestBtn);
customDialog.setView(tmpname);
customDialog.setView(tmpaddress);
customDialog.setView(tmpuser);
customDialog.setView(tmppass);
customDialog.setView(tmpport);
customDialog.setView(tmppassive);
customDialog.setView(tmpsavetsite);
customDialog.setView(tmpsites);
tmpclose.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
customDialog.dismiss();
}
});
tmptestBtn.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
_name = tmpname.getText().toString();
_address = tmpaddress.getText().toString();
_user = tmpuser.getText().toString();
_pass = tmppass.getText().toString();
_port = Integer.parseInt(tmpport.getText().toString());
_passive = false;
if (tmppassive.isChecked()) {
_passive = true;
}
boolean status = ftpConnect(_address, _user, _pass, _port);
if (status == true) {
Toast.makeText(FTPConnector.this, "Connection Succesful",
Toast.LENGTH_LONG).show();
} else {
Toast.makeText(FTPConnector.this,
"Connection Failed:" + status, Toast.LENGTH_LONG)
.show();
}
}
});
tmpsavetsite.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
tmpsites.setText("");
String msg = "!";
_name = tmpname.getText().toString();
_address = tmpaddress.getText().toString();
_user = tmpuser.getText().toString();
_pass = tmppass.getText().toString();
_port = Integer.parseInt(tmpport.getText().toString());
long newId = myDb.insertRow(_name, _address, _user, _pass, 21);
Cursor c = myDb.getAllRows();
if (c.moveToFirst()) {
int id = c.getInt(0);
String _name = c.getString(1);
String _address = c.getString(2);
String _user = c.getString(3);
String _pass = c.getString(4);
int _port = c.getInt(5);
msg += "id=" + id + "\n";
msg += ", name=" + _name + "\n";
msg += ", address=" + _address + "\n";
msg += ", username=" + _user + "\n";
msg += ", password=" + _pass + "\n";
msg += ", port=" + _port + "\n";
while (c.moveToNext());
}
c.close();
// displayText(msg);
tmpsites.setText(msg);
}
});
customDialog.setView(view);
customDialog.show();
}
Why can't I add more than one record?

In here :
while (c.moveToNext()); //<<<
currently you are not using any loop like do-while for iterating through cursor(you forget to add do block with while). get all data from cursor as using for loop:
//more to the first row
c.moveToFirst();
//iterate over rows
for (int i = 0; i < c.getCount(); i++) {
// get all data here from current row..
//move to the next row
c.moveToNext();
}
//close the cursor
c.close();
and using do-while you can get all values from current row as:
c.moveToFirst(); //more to the first row
do {
// get all data here from current row..
} while (c.moveToNext());

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