Develop Reference

Only one column of data inserted in the sqlite database

So I'm using multiple radiogroup and an EditText to insert the data into the database. The problem is that only one column of data is inserted and it is always the the collection_time column.
This is the coding to insert the data:
BtnNext1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(SelectPrintingDetails.this, Summary.class);
int selectedId = rgCP.getCheckedRadioButtonId();
if(selectedId != -1)
{
RadioButton selectedRadioButton = (RadioButton) findViewById(selectedId);
String rbCP = selectedRadioButton.getText().toString();
Boolean insertPD = db.insertcolor(rbCP);
if(insertPD == true)
{
intent.putExtra("Color", rbCP);
}
else
{
Toast.makeText(getApplicationContext(), "Data is not inserted",Toast.LENGTH_SHORT).show();
}
}
else
{
Toast.makeText(getApplicationContext(), "Radiobutton is not selected",Toast.LENGTH_SHORT).show();
}
int selectedId1 = rgFP.getCheckedRadioButtonId();
if(selectedId1 != -1)
{
RadioButton selectedRadioButton = (RadioButton) findViewById(selectedId1);
String rbFP = selectedRadioButton.getText().toString();
Boolean insertPD1 = db.insertflip(rbFP);
if(insertPD1 == true)
{
intent.putExtra("Flip", rbFP);
}
else
{
Toast.makeText(getApplicationContext(), "Data is not inserted",Toast.LENGTH_SHORT).show();
}
}
else
{
Toast.makeText(getApplicationContext(), "Radiobutton is not selected",Toast.LENGTH_SHORT).show();
}
int selectedId2 = rgPC.getCheckedRadioButtonId();
if(selectedId1 != -1)
{
RadioButton selectedRadioButton = (RadioButton) findViewById(selectedId2);
String rbPC = selectedRadioButton.getText().toString();
Boolean insertPD2 = db.insertpc(rbPC);
if(insertPD2 == true)
{
intent.putExtra("Plastic", rbPC);
}
else
{
Toast.makeText(getApplicationContext(), "Data is not inserted",Toast.LENGTH_SHORT).show();
}
}
else
{
Toast.makeText(getApplicationContext(), "Radiobutton is not selected",Toast.LENGTH_SHORT).show();
}
int selectedId3 = rgBind.getCheckedRadioButtonId();
if(selectedId1 != -1)
{
RadioButton selectedRadioButton = (RadioButton) findViewById(selectedId3);
String rbBind = selectedRadioButton.getText().toString();
Boolean insertPD3 = db.insertbind(rbBind);
if(insertPD3 == true)
{
intent.putExtra("Bind", rbBind);
}
else
{
Toast.makeText(getApplicationContext(), "Data is not inserted",Toast.LENGTH_SHORT).show();
}
}
else
{
Toast.makeText(getApplicationContext(), "Radiobutton is not selected",Toast.LENGTH_SHORT).show();
}
String timecollect = etCT.getText().toString();
Boolean insertPD4 = db.insertct(timecollect);
if(insertPD4 == true)
{
intent.putExtra("Collect", timecollect);
}
else
{
Toast.makeText(getApplicationContext(), "Data is not inserted",Toast.LENGTH_SHORT).show();
}
startActivity(intent);
}
});
This is the databasehelper :
public class DatabaseHelper extends SQLiteOpenHelper {
public DatabaseHelper(Context context) {
super(context, "hdatabase1.db", null, 1);
}
#Override
public void onCreate(SQLiteDatabase db) {
db.execSQL("Create table printingdetails (color text, binding text, collection_time text, flipped_page text, plastic_cover text)");
}
#Override
public void onUpgrade(SQLiteDatabase db, int i, int i1) {
db.execSQL("drop table if exists printingdetails");
}
public boolean insertcolor(String color)
{
SQLiteDatabase db = this.getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put("color", color);
long ins = db.insert("printingdetails", null, contentValues);
if(ins==-1) return false;
else return true;
}
public boolean insertflip(String flipped_page)
{
SQLiteDatabase db = this.getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put("flipped_page", flipped_page);
long ins = db.insert("printingdetails", null, contentValues);
if(ins==-1) return false;
else return true;
}
public boolean insertpc(String plastic_cover)
{
SQLiteDatabase db = this.getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put("plastic_cover", plastic_cover);
long ins = db.insert("printingdetails", null, contentValues);
if(ins==-1) return false;
else return true;
}
public boolean insertbind(String binding)
{
SQLiteDatabase db = this.getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put("binding", binding);
long ins = db.insert("printingdetails", null, contentValues);
if(ins==-1) return false;
else return true;
}
public boolean insertct (String collection_time)
{
SQLiteDatabase db = this.getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put("collection_time", collection_time);
long ins = db.insert("printingdetails", null, contentValues);
if(ins==-1) return false;
else return true;
}
I hope you guys guide me how to insert all the data in every column. I'm still new and I had already refer to several related post here and none of it really helping

Currently you seem to be inserting the value of each column separately. This means instead of a single row, you end up with multiple rows where only one column has a value and the rest are empty.
In order to fix this, you need a single method which is something like this:
public boolean insertRow(String color, String binding, String time, String flipped_page, String plastic_cover) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put("color", color);
contentValues.put("binding", binding);
contentValues.put("collection_time", time);
contentValues.put("flipped_page", flipped_page);
contentValues.put("plastic_cover", plastic_cover);
long ins = db.insert("printingdetails", null, contentValues);
if(ins==-1) return false;
else return true;
}
Each individual insert command should be removed. Now, your onClick method will have to retrieve all the selected items and then call this insert method. Handling of unselected radio groups will depend on your application. In the sample below, I am simply interrupting the method, thus cancelling the submission. If some radio groups are optional, then you can set the corresponding strings to empty ("") and proceed with the method rather than cancelling the submission by returning.
public void onClick(View v) {
Intent intent = new Intent(SelectPrintingDetails.this, Summary.class);
String color, binding, time, page, cover;
int selectedId = rgCP.getCheckedRadioButtonId();
if(selectedId != -1)
{
RadioButton selectedRadioButton = (RadioButton) findViewById(selectedId);
color = selectedRadioButton.getText().toString();
}
else
{
Toast.makeText(getApplicationContext(), "Color is not selected",Toast.LENGTH_SHORT).show();
return; // this prevents the rest of the code from executing
}
int selectedId1 = rgFP.getCheckedRadioButtonId();
if(selectedId1 != -1)
{
RadioButton selectedRadioButton = (RadioButton) findViewById(selectedId1);
page = selectedRadioButton.getText().toString();
}
else
{
Toast.makeText(getApplicationContext(), "FlipPage is not selected",Toast.LENGTH_SHORT).show();
return;
}
int selectedId2 = rgPC.getCheckedRadioButtonId();
if(selectedId2 != -1)
{
RadioButton selectedRadioButton = (RadioButton) findViewById(selectedId2);
cover = selectedRadioButton.getText().toString();
}
else
{
Toast.makeText(getApplicationContext(), "Plastic Cover is not selected",Toast.LENGTH_SHORT).show();
return;
}
int selectedId3 = rgBind.getCheckedRadioButtonId();
if(selectedId3 != -1)
{
RadioButton selectedRadioButton = (RadioButton) findViewById(selectedId3);
binding = selectedRadioButton.getText().toString();
}
else
{
Toast.makeText(getApplicationContext(), "Binding is not selected",Toast.LENGTH_SHORT).show();
return;
}
time = etCT.getText().toString();
// since all attributed have been read, now we call insert
// you can read the returned boolean to determine if the insertion was successful
db.insertRow(color, binding, time, page, cover);
// Also add all of them as intent extras
intent.putExtra("Color", color);
intent.putExtra("Bind", binding);
intent.putExtra("Collect", time);
intent.putExtra("Flip", page);
intent.putExtra("Plastic", cover);
startActivity(intent);
}
I hope this helps you understand where you were going wrong, and how you can take this forward.

Android - adding validation to input fields

I am making an Android app that uses a sqlite database to store the app data, an activity class to edit / insert data, a DbHelper to manage the database creation and version, and a content provider which manages access to the database.
I have managed to get data to be queried, inserted, deleted and edited from the database. However, I'm not too sure on how to add visual feedback to the user. I've tried adding a Toast in place where I have put an IllegalArgumentException but the app will simply add the content to the database.
If I omit the Name, the app will trigger the defined IllegalArgumentException and then crash the application.
This is a snippet for the insert method in the content provider
#Override
public Uri insert(Uri uri, ContentValues contentValues) {
final int match = sUriMatcher.match(uri);
switch (match) {
case PATIENT:
return insertPatient(uri, contentValues);
default:
throw new IllegalArgumentException("Insertion is not supported for " + uri);
}
}
/**
* Insert a patient into the database with the given content values.
*/
private Uri insertPatient(Uri uri, ContentValues values) {
String name = values.getAsString(PatientEntry.COLUMN_PATIENT_NAME);
if (name == null || name.length()==0) {
//Toast.makeText(getContext(), "Patient requires a name", Toast.LENGTH_SHORT).show();
throw new IllegalArgumentException("Patient requires a name");
}
Integer weight = values.getAsInteger(PatientEntry.COLUMN_PATIENT_WEIGHT);
if (weight != null && weight < 0) {
throw new IllegalArgumentException("Patient requires valid weight");
}
SQLiteDatabase database = mDbHelper.getWritableDatabase();
long id = database.insert(PatientEntry.TABLE_NAME, null, values);
if (id == -1) {
Log.e(LOG_TAG, "Failed to insert row for " + uri);
return null;
}
getContext().getContentResolver().notifyChange(uri, null);
return ContentUris.withAppendedId(uri, id);
}
This is a snippet from the activity file
private void savePatient() {
String nameString = mNameEditText.getText().toString().trim();
String weightString = mWeightEditText.getText().toString().trim();
if (mCurrentPatientUri == null &&
TextUtils.isEmpty(nameString) && TextUtils.isEmpty(weightString) {
Toast.makeText(this, "Data was not saved", Toast.LENGTH_SHORT).show();
return;
}
ContentValues values = new ContentValues();
values.put(PatientEntry.COLUMN_PATIENT_NAME, nameString);
int weight = 0;
if (!TextUtils.isEmpty(weightString)) {
weight = Integer.parseInt(weightString);
}
values.put(PatientEntry.COLUMN_PATIENT_WEIGHT, weight);
// Determine if this is a new or existing Patient by checking if mCurrentPatientUri is null or not
if (mCurrentPatientUri == null) {
// This is a NEW patient
Uri newUri = getContentResolver().insert(PatientEntry.CONTENT_URI, values);
if (newUri == null) {
Toast.makeText(this, getString(R.string.editor_insert_patient_failed),
Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(this, getString(R.string.editor_insert_patient_successful),
Toast.LENGTH_SHORT).show();
}
} else {
// Otherwise this is an EXISTING patient
int rowsAffected = getContentResolver().update(mCurrentPatientUri, values, null, null);
if (rowsAffected == 0) {
Toast.makeText(this, getString(R.string.editor_update_patient_failed),
Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(this, getString(R.string.editor_update_patient_successful),
Toast.LENGTH_SHORT).show();
}
}
}
Could someone kindly lend a hand?
.................................................................
EDIT 1:
This is the menu in the activity which calls savePatient:
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// User clicked on a menu option in the app bar overflow menu
switch (item.getItemId()) {
case R.id.action_save:
savePatient();
finish();
return true;
case R.id.action_delete:
showDeleteConfirmationDialog();
return true;
case android.R.id.home:
if (!mPatientHasChanged) {
NavUtils.navigateUpFromSameTask(EditorActivity.this);
return true;
}
// Otherwise if there are unsaved changes, setup a dialog to warn the user.
DialogInterface.OnClickListener discardButtonClickListener =
new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {
NavUtils.navigateUpFromSameTask(EditorActivity.this);
}
};
showUnsavedChangesDialog(discardButtonClickListener);
return true;
}
return super.onOptionsItemSelected(item);
}

For visual feedback validations are to be done as early as possible.
For example before you call save patient on some user action just call validatePatient() which if fails save will not be called.
For Visual feedback you can have error texts below your fields that will become visible only if validation related to that field fails.

How do I use one button to swap between adding and deleting data from an sqlite database?

I have an sqlite database that collects data from the user and can delete it as well.
Here is it being created:
db.execSQL("CREATE TABLE " + TABLE_NAME + " (ID INTEGER PRIMARY KEY AUTOINCREMENT, DATA TEXT UNIQUE) ");
Here's the code for the adding data and removing data
public boolean insertData(String data) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues cValues = new ContentValues();
cValues.put(Col_2, data);
long result = db.insert(TABLE_NAME, null, cValues);
if (result == -1)
return false;
else
return true;
}
public boolean deleteData(String data){
SQLiteDatabase db = this.getWritableDatabase();
long result = db.delete(TABLE_NAME, "DATA = ?", new String[]{data});
ContentValues cValues = new ContentValues();
if (result == 0)
return false;
else
return true;
}
Here is the java button im trying to use
public void changeData(){
favBtn.setOnClickListener(
new View.OnClickListener(){
#Override
public void onClick(View v){
boolean isInserted = myDB.insertData(textView.getText().toString());
if(isInserted == true)
Toast.makeText(randomApp.this, "Added Data", Toast.LENGTH_LONG).show();
else
Toast.makeText(randomApp.this, "Data was deleted", Toast.LENGTH_LONG).show();
myDB.deleteData(textView.getText().toString());
}
}
);
}
The issue is that when this button is clicked it adds data but then will not remove said data. It will just continue playing the "added data" toast and add said data to the database- there is a unique constraint with the data
column but I'm not really sure what I'm doing wrong or missing as I understand it should not be added twice. It should remove the data if that is already added and vice versa.

According to your code the delete data code will always execute. And the data you are inserting will immediately deleted, hence the unique constraint won't break ever. You didn't put any {} in your else case and it contains two statements; first one considered as the statement inside else and second one will be considered as a statement outside the if and else case. So for fixing this issue you need to put {} properly. (Personal opinion : Try to put {} in if and else cases even if there is only one statement)
You should change that to:
if(isInserted == true)
{
Toast.makeText(randomApp.this, "Added Data", Toast.LENGTH_LONG).show();
}
else
{
Toast.makeText(randomApp.this, "Data was deleted", Toast.LENGTH_LONG).show();
myDB.deleteData(textView.getText().toString());
}

You are calling myDB.insertData on every click first, for every insert it will return true, so isInserted will be true always, thats why do you add multiple times the same data. Try this:
private isInserted = false;
public void changeData(){
favBtn.setOnClickListener(
new View.OnClickListener(){
#Override
public void onClick(View v){
if(!isInserted){
Toast.makeText(randomApp.this, "Added Data", Toast.LENGTH_LONG).show();
myDB.insertData(textView.getText().toString());
}
else{
Toast.makeText(randomApp.this, "Data was deleted", Toast.LENGTH_LONG).show();
myDB.deleteData(textView.getText().toString());
}
isInserted = !isInserted;
}
}
);
}

Android check user in Database

First sorry for my poor english :)
I click button but app close automaticly
I want if user exist database , read editttext "exist"
Database activity code:
public Boolean varmi(String KULLANICI) {
// TODO Auto-generated method stub
Cursor c = DB_Database.query(DATABASE_TABLOSU, kolonlar, K_ADI + "=" + KULLANICI, null, null, null, null);
if(c.moveToFirst()){
return true;
}
else{
return null;
}
}
Main activity code:
buttonGiris.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
String KULLANICI=editKullanici.getText().toString();
db.dbyiac();
if(db.varmi(KULLANICI) != null){
textBilgiler.setText("User exist");
}
else{textBilgiler.setText("User don't exist");}
db.dbyikapat();
}

String literals in SQL must be in single quotes. Better yet, use ? literal placeholder and argument binding:
Cursor c = DB_Database.query(DATABASE_TABLOSU, kolonlar, K_ADI + "=?", new String[] { KULLANICI }, null, null, null);

cursor.getColumnIndex(String columnName) returns -1 if, the column doesn't exist :) and call this method textBilgiler.setText("User don't exist"); :) kolay gele.

How to pass data from sqlite listview to new intent?

(this is my lunch.class which populate the listview from database.tell me if there is any mistakes.im still new to this.)
public class Lunch extends Activity implements OnItemClickListener {
DBOpener dbopener;
#Override
protected void onCreate(Bundle savedInstanceState) {
//for fullscreen view
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.dinner);
dbopener = new DBOpener(this);
}
// Open the DB, query all subject codes and refresh the listview
// when app resumes
#Override
protected void onResume() {
super.onResume();
// Configure the listview
ArrayList<String> mealNames = new ArrayList<String>();
ListView lstDine = (ListView)this.findViewById(R.id.dine);
lstDine.setAdapter(new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, mealNames));
// Open/create the DB
try {
dbopener.createDatabase(); // Create DB if necessary
dbopener.openDatabase(); // Open the DB
Cursor dinners = dbopener.getLunchNames();
while (dinners.moveToNext()) {
mealNames.add(dinners.getString(0)); // Get the current subj
// code, add to list
}
dinners.close();
// Update the listview
ArrayAdapter<String> ad = (ArrayAdapter<String>)lstDine.getAdapter();
ad.notifyDataSetChanged();
lstDine.setOnItemClickListener(this);
} catch (Exception e) {
Toast.makeText(this, "Could not open DB",
Toast.LENGTH_LONG).show();
}
}
// Close the DB when app pauses
#Override
protected void onPause() {
super.onPause();
dbopener.close();
}
// When user clicks on an item
public void onItemClick(AdapterView<?> parent, View v, int pos, long id) {
// Use subject code from listview to retrieve other
// details with the dbopener
switch(pos)
{
case 0 :
Intent newActivity = new Intent("com.edu.tp.iit.mns.Display");
newActivity.putExtra("1", "2"); // this is where im unaware of the codes.how to pass the strings of value to the next page
startActivity(newActivity);
break;
}
switch(pos)
{
case 1 :
Intent newActivity = new Intent("com.edu.tp.iit.mns.Display");
startActivity(newActivity);
break;
}
switch(pos)
{
case 2 :
Intent newActivity = new Intent("com.edu.tp.iit.mns.Display");
startActivity(newActivity);
break;
}
switch(pos)
{
case 3 :
Intent newActivity = new Intent("com.edu.tp.iit.mns.Display");
startActivity(newActivity);
break;
}
switch(pos)
{
case 4 :
Intent newActivity = new Intent("com.edu.tp.iit.mns.Display");
startActivity(newActivity);
break;
}
switch(pos)
{
case 5 :
Intent newActivity = new Intent("com.edu.tp.iit.mns.Display");
startActivity(newActivity);
break;
}
switch(pos)
{
case 6 :
Intent newActivity = new Intent("com.edu.tp.iit.mns.Display");
startActivity(newActivity);
break;
}
switch(pos)
{
case 7 :
Intent newActivity = new Intent("com.edu.tp.iit.mns.Display");
startActivity(newActivity);
break;
}
}
(this is the display.class (image 2) works like a template to display dynamic info like image,food name, food description and its rating.
public class Display extends Activity {
DBOpener dbopener;
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.display);
dbopener = new DBOpener(this);
}
#Override
protected void onResume() {
super.onResume();
// Configure the listview
// ArrayList<String> mealNames = new ArrayList<String>();
// ListView lstDine = (ListView)this.findViewById(R.id.dine);
// lstDine.setAdapter(new ArrayAdapter<String>(this,
// android.R.layout.simple_list_item_1, mealNames));
// Open/create the DB
try {
// dbopener.createDatabase(); // Create DB if necessary
dbopener.openDatabase(); // Open the DB
Toast.makeText(this, " open DB",
Toast.LENGTH_LONG).show();
Cursor dinners = dbopener.getLunchNames();
while (dinners.moveToNext()) {
// mealNames.add(dinners.getString(0)); // Get the current subj
// code, add to list
}
dinners.close();
// Update the listview
// ArrayAdapter<String> ad = (ArrayAdapter<String>)lstDine.getAdapter();
// ad.notifyDataSetChanged();
//
// lstDine.setOnItemClickListener(this);
} catch (Exception e) {
Toast.makeText(this, "Could not open DB",
Toast.LENGTH_LONG).show();
}
}
// Close the DB when app pauses
#Override
protected void onPause() {
super.onPause();
dbopener.close();
}
}
and lastly my dpopener file:
public class DBOpener extends SQLiteOpenHelper {
private static String DB_PATH =
"/data/data/com.edu.tp.iit.mns/databases/"; //path of our database
private static String DB_NAME ="finals"; // Database name
private final Context myContext;
private SQLiteDatabase db;
#Override
public void onCreate(SQLiteDatabase db) {
// TODO Auto-generated method stub
}
#Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// TODO Auto-generated method stub
}
public DBOpener(Context context) {
super(context, DB_NAME, null, 1);
myContext = context;
}
public void createDatabase() throws IOException {
boolean dbExists = checkDatabase();
if (dbExists) {
// Do nothing, DB already exists
Log.d("DBOpener", "DB exists");
} else {
// By calling this method an empty database will be created
// in the default system path of your application, which we
// will overwrite with our own database.
Log.d("DBOpener", "DB does not exit - copying from assets");
this.getReadableDatabase();
copyDatabase();
}
}
private boolean checkDatabase() {
SQLiteDatabase checkDB = null;
try {
// Try opening the database
String path = DB_PATH + DB_NAME;
checkDB = SQLiteDatabase.openDatabase(path, null,
SQLiteDatabase.OPEN_READONLY);
} catch (SQLiteException e) {
// If it fails, DB does not exist
}
if (checkDB != null)
checkDB.close(); // Close the DB; we don’t need it now
return checkDB != null;
}
private void copyDatabase() throws IOException {
InputStream istream = myContext.getAssets().open(DB_NAME);
OutputStream ostream = new FileOutputStream(DB_PATH + DB_NAME);
// Transfer bytes from istream to ostream
byte[] buffer = new byte[1024];
int length;
while ((length = istream.read(buffer)) > 0) {
ostream.write(buffer, 0, length);
}
// Close streams
istream.close();
ostream.flush();
ostream.close();
}
public void openDatabase() throws SQLiteException {
db = SQLiteDatabase.openDatabase(DB_PATH + DB_NAME, null,
SQLiteDatabase.OPEN_READWRITE);
}
#Override
public synchronized void close() {
if (db != null)
db.close();
super.close();
}
// Retrieve all subject codes
public Cursor getDinnerNames() {
if (db == null)
return null;
return db.query("dinner", new String[] {"name"},
null, null, null, null, null);
}
// Get details of specific subject
public Cursor getDinnerDetails(String name) {
if (db == null)
return null;
return db.query("dinner", new String[] {"name", "nutrition", "rating"},
"name = ?", new String[] {name}, null, null, null);
}
// Retrieve all subject codes
public Cursor getLunchNames() {
if (db == null)
return null;
return db.query("lunch", new String[] {"name"},
null, null, null, null, null);
}
// Get details of specific subject
public Cursor getLunchDetails(String name) {
if (db == null)
return null;
return db.query("dinner", new String[] {"name", "nutrition", "rating"},
"name = ?", new String[] {name}, null, null, null);
}
// Retrieve all subject codes
public Cursor getBreakfastNames() {
if (db == null)
return null;
return db.query("breakfast", new String[] {"name"},
null, null, null, null, null);
}
// Get details of specific subject
public Cursor getBreakfastDetails(String name) {
if (db == null)
return null;
return db.query("breakfast", new String[] {"name", "nutrition", "rating"},
"name = ?", new String[] {name}, null, null, null);
}
}
can u help me kick start with the case 0 so that i can complete the code. example, user click BBQ chicken sandwich. it will navigate to display.class and retrieve the info from db and shows image rating and stuffs.

To pass arguments to the new activity via intent you use the putExtra(), like you put on your code:
newActivity.putExtra("1", "2");
The first parameter should be an String constant to identify your parameter, you will use this String to get the value later. The second parameter is the value, android has methods for all the primitives.
On the new activity, you use getExtra("1", "2"), where 1 is the constant you used earlier and 2 is the default value, in case it doesn't finds the value or the constant you used.