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Using Android studio and my application force closes when i click a button [duplicate]

This question already has answers here:
Unfortunately MyApp has stopped. How can I solve this?
(23 answers)
Closed 3 years ago.
Hi I'm making a bill splitting app in android studio 3.3. I've made a database with sqlite and it stores a product's name and cost. As I am trying to get the total cost of the input from the database and store it in a text view the app closes. I've came to the conclusion that the problem is located in the getTotal() method in MyDBHandler.java
public class MyDBHandler extends SQLiteOpenHelper{
private static final int DATABASE_VERSION = 6;
private static final String DATABASE_NAME = "productDB.db";
public static final String TABLE_PRODUCTS = "products";
public static final String COLUMN_ID = "_id";
public static final String COLUMN_PRODUCTNAME = "productname";
public static final String COLUMN_PRODUCTCOST = "productcost";
//We need to pass database information along to superclass
public MyDBHandler(Context context, String name,
SQLiteDatabase.CursorFactory factory, int version) {
super(context, DATABASE_NAME, factory, DATABASE_VERSION);
}
#Override
public void onCreate(SQLiteDatabase db) {
String query = "CREATE TABLE " + TABLE_PRODUCTS + "(" +
COLUMN_ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " +
COLUMN_PRODUCTNAME + " TEXT " + "," +
COLUMN_PRODUCTCOST + " INTEGER " +
");";
db.execSQL(query);
}
#Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
db.execSQL("DROP TABLE IF EXISTS " + TABLE_PRODUCTS);
onCreate(db);
}
//Add a new row to the database
public void addProduct(Products product){
ContentValues values = new ContentValues();
values.put(COLUMN_PRODUCTNAME, product.get_productname());
values.put(COLUMN_PRODUCTCOST, product.get_productcost());
SQLiteDatabase db = getWritableDatabase();
db.insert(TABLE_PRODUCTS, null, values);
db.close();
}
//Delete a product from the database
public void deleteProduct(String productName){
SQLiteDatabase db = getWritableDatabase();
db.execSQL("DELETE FROM " + TABLE_PRODUCTS + " WHERE " +
COLUMN_PRODUCTNAME + "=\"" + productName + "\";");
}
//get the total sum of teh Product_Cost column
//
// TODO: fix this method to display total
// NOTE: THIS IS YOUR PROBLEM
//
//
public int GetTotal(){
int temp;
SQLiteDatabase db = getWritableDatabase();
String query = " SELECT SUM(COLUMN_PRODUCTCOST) FROM " + TABLE_PRODUCTS + ";";
Cursor cursor = db.rawQuery(query , null);
if (cursor.moveToFirst()) {
temp = cursor.getInt(0);
}
else return 0;
cursor.close();
return temp;
}
// converts the elements in the database to a string so you can print the database out.
public String databaseToString(){
String dbString = "";
SQLiteDatabase db = getWritableDatabase();
String query = "SELECT * FROM " + TABLE_PRODUCTS + " WHERE 1";// why not leave out the WHERE clause?
//Cursor points to a location in your results
Cursor recordSet = db.rawQuery(query, null);
//Move to the first row in your results
recordSet.moveToFirst();
//Position after the last row means the end of the results
while (!recordSet.isAfterLast()) {
// null could happen if we used our empty constructor
if (recordSet.getString(recordSet.getColumnIndex("productname")) != null) {
dbString += recordSet.getString(recordSet.getColumnIndex("productname"));
dbString += "\t $";
dbString += recordSet.getString(recordSet.getColumnIndex("productcost"));
dbString += "\n";
}
recordSet.moveToNext();
}
db.close();
return dbString;
}
}
public class MainActivity extends AppCompatActivity {
EditText userInput;
EditText userInputC;
TextView recordsTextView;
TextView Results;
MyDBHandler dbHandler;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
userInput = (EditText) findViewById(R.id.user_Input);
userInputC = (EditText) findViewById(R.id.user_InputC);
recordsTextView = (TextView) findViewById(R.id.records_TextView);
Results = (TextView) findViewById(R.id.Results);
/* Can pass nulls because of the constants in the helper.
* the 1 means version 1 so don't run update.
*/
dbHandler = new MyDBHandler(this, null, null, 1);
printDatabase();
}
//Print the database
public void printDatabase(){
String dbString = dbHandler.databaseToString();
recordsTextView.setText(dbString);
userInput.setText("");
userInputC.setText("");
}
/*
//Add a product to the database
public void addButtonClicked(View view){
// dbHandler.add needs an object parameter.
int count = Integer.parseInt(Results.getText().toString());
int num = Integer.parseInt(userInputC.getText().toString());
count = count + num;
String temp = Results.getText().toString();
float temp1 = Float.parseFloat(temp);
//Results.setText(Integer.toString(count));
Results.setText(Float.toString(count));
Products product = new Products(userInput.getText().toString(), temp1);
dbHandler.addProduct(product);
//Results = ;
printDatabase();
}*/
#SuppressLint("SetTextI18n")
public void addButtonClicked(View view){
// dbHandler.add needs an object parameter.
int usersinput = Integer.parseInt(userInputC.getText().toString());
Products product = new Products(userInput.getText().toString(), usersinput);
int temp = dbHandler.GetTotal();
dbHandler.addProduct(product);
Results.setText(Integer.toString(temp));
printDatabase();
}
//Delete items
public void deleteButtonClicked(View view){
// dbHandler delete needs string to find in the db
String inputText = userInput.getText().toString();
dbHandler.deleteProduct(inputText);
printDatabase();
}
}

You should change :-
String query = " SELECT SUM(COLUMN_PRODUCTCOST) FROM " + TABLE_PRODUCTS + ";";
to be
String query = " SELECT SUM(" + COLUMN_PRODUCTCOST + ") FROM " + TABLE_PRODUCTS + ";";
Otherwise the query will fail as there is no column named COLUMN_PRODUCTCOST, instead you want the value when COLUMN_PRODUCTCOST is resolved (i.e. productcost), which is a column name.
You may also wish to consider using the query convenience method rather than using the rawQuery method.
Your code could then be :-
public int GetTotal(){
int temp;
SQLiteDatabase db = getWritableDatabase();
String[] columns = new String[]{"SELECT SUM(" + COLUMN_PRODUCTCOST + ")"}
Cursor cursor = db.query(TABLE_PRODUCTS,columns,null,null,null,null,null);
if (cursor.moveToFirst()) {
temp = cursor.getInt(0);
}
else temp = 0; //<<<<<<<<<< CHANGED not to return as the Cursor would not be closed.
cursor.close();
return temp;
}
Note this closes the Cursor even if there are no rows, which should be the case (you could apply this to your code that uses rawQuery).

This is a bad sql query:
String query = " SELECT SUM(COLUMN_PRODUCTCOST) FROM " + TABLE_PRODUCTS + ";"
Should it be
String query = " SELECT SUM(" + COLUMN_PRODUCTCOST + ") FROM " + TABLE_PRODUCTS + ";"

android.database.CursorIndexOutOfBoundsException -- my cursor is empty

So I have been trying to query in my sqlite database for my android app. However, it seems like my cursor is not working like it is supposed too as I can get any results.
I know that I only have 3 items in my database, but what I put in my query are valid attributes for my 3 items stored. But there is still no result.
Below is my code for the query function and my database model.
// To get data from DB by querying the items selected
public String getData(int firstSelection, int secondSelection, int thirdSelection,
int fourthSelection, int fifthSelection)
{
SQLiteDatabase db = dbHelper.getWritableDatabase();
String firstSelectionStr, secondSelectionStr, thirdSelectionStr, fourthSelectionStr, fifthSelectionStr;
firstSelectionStr = Integer.toString(firstSelection);
secondSelectionStr = Integer.toString(secondSelection);
thirdSelectionStr = Integer.toString(thirdSelection);
fourthSelectionStr = Integer.toString(fourthSelection);
fifthSelectionStr = Integer.toString(fifthSelection);
//String[] columns = {DBHelper.UID,DBHelper.CNAME};
//Cursor cursor = db.query(DBHelper.TABLE_NAME,columns,null,null,null,null,null);
String selectQuery = "SELECT * FROM "+ DBHelper.TABLE_NAME + " WHERE " + DBHelper.FIRST_ATTRIBUTE + "=? "
+ " AND " + DBHelper.SECOND_ATTRIBUTE + "=? " + " AND " + DBHelper.THIRD_ATTRIBUTE + "=? " + " AND " + DBHelper.FOURTH_ATTRIBUTE + "=? "
+ " AND " + DBHelper.FIFTH_ATTRIBUTE + "=?";
Cursor cursor=db.rawQuery(selectQuery, new String[] {firstSelectionStr, secondSelectionStr, thirdSelectionStr,
fourthSelectionStr, fifthSelectionStr});
StringBuilder buffer = new StringBuilder();
cursor.moveToFirst();
if (cursor != null) {
int tresult = cursor.getCount();
// Append every data together
do {
//int cursorID = cursor.getInt(cursor.getColumnIndex(DBHelper.UID));
String chosenItem = cursor.getString(cursor.getColumnIndex(DBHelper.CNAME));
buffer.append(chosenItem + " ");
} while (cursor.moveToNext());
/*while (cursor.moveToNext())
{
//int cursorID = cursor.getInt(cursor.getColumnIndex(DBHelper.UID));
String chosenItem = cursor.getString(cursor.getColumnIndex(DBHelper.CNAME));
buffer.append(chosenItem + " ");
}*/
}
return buffer.toString();
}
static class DBHelper extends SQLiteOpenHelper
{
private static final String DATABASE_NAME = "CraftsAppDatabase.db"; // Database Name
private static final String TABLE_NAME = "CraftTools"; // Table Name
private static final String RESULT_TABLE = "Result"; // Table Name
private static final int DATABASE_Version = 1; // Database Version
private static final String UID="_id"; // Column I (Primary Key)
private static final String CNAME = "Craft_Name"; //Column II
private static final String RESULT = "Result_Name"; //Column II
private static final String FIRST_ATTRIBUTE = "First_Attribute"; //Column III
private static final String SECOND_ATTRIBUTE = "Second_Attribute"; //Column IV
private static final String THIRD_ATTRIBUTE = "Third_Attribute"; //Column V
private static final String FOURTH_ATTRIBUTE = "Fourth_Attribute"; //Column VI
private static final String FIFTH_ATTRIBUTE = "Fifth_Attribute"; //Column VII
private static final String CREATE_TABLE = "CREATE TABLE "+TABLE_NAME+
" ("+UID+" INTEGER PRIMARY KEY AUTOINCREMENT, "+CNAME+" VARCHAR(255)" +
", "+FIRST_ATTRIBUTE+" VARCHAR(255), "+SECOND_ATTRIBUTE+" VARCHAR(255)" +
", "+THIRD_ATTRIBUTE+" VARCHAR(255), "+FOURTH_ATTRIBUTE+" VARCHAR(255)" +
", "+FIFTH_ATTRIBUTE+" VARCHAR(255));";
private static final String CREATE_OTHER_TABLE = "CREATE TABLE "+RESULT_TABLE+
" ("+UID+" INTEGER PRIMARY KEY AUTOINCREMENT, "+RESULT+" VARCHAR(255));";
private static final String DROP_TABLE ="DROP TABLE IF EXISTS "+RESULT_TABLE;
private Context context;
public DBHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_Version);
this.context=context;
}
/*public void deleteTable(SQLiteDatabase db) {
db = getWritableDatabase();
db.execSQL("DROP TABLE IF EXISTS CraftTools");
}*/
public void onCreate(SQLiteDatabase db) {
db.execSQL(DROP_TABLE);
db.execSQL(CREATE_OTHER_TABLE);
db.execSQL(CREATE_TABLE);
db.execSQL("INSERT INTO " + TABLE_NAME + "(Craft_Name, First_Attribute, Second_Attribute, Third_Attribute, Fourth_Attribute, Fifth_Attribute ) " +
"VALUES ('Landscape Drawing', '1', '4','8', '0', '0')");
db.execSQL("INSERT INTO " + TABLE_NAME + "(Craft_Name, First_Attribute, Second_Attribute, Third_Attribute, Fourth_Attribute, Fifth_Attribute ) " +
"VALUES ('Popsicle Sticks House', '2', '3','0', '0', '0')");
db.execSQL("INSERT INTO " + TABLE_NAME + "(Craft_Name, First_Attribute, Second_Attribute, Third_Attribute, Fourth_Attribute, Fifth_Attribute ) " +
"VALUES ('Sunset Painting', '4', '7','10', '0', '0')");
/*try {
db.execSQL(CREATE_TABLE);
} catch (Exception e) {
Message.message(context,""+e);
}*/
}
#Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
//db.execSQL(DROP_TABLE);
onCreate(db);
if (newVersion > oldVersion) {
db.execSQL("ALTER TABLE CraftTools ADD COLUMN FIRST_ATTRIBUTE INTEGER DEFAULT 0");
db.execSQL("ALTER TABLE CraftTools ADD COLUMN SECOND_ATTRIBUTE INTEGER DEFAULT 0");
db.execSQL("ALTER TABLE CraftTools ADD COLUMN THIRD_ATTRIBUTE INTEGER DEFAULT 0");
db.execSQL("ALTER TABLE CraftTools ADD COLUMN FOURTH_ATTRIBUTE INTEGER DEFAULT 0");
db.execSQL("ALTER TABLE CraftTools ADD COLUMN FIFTH_ATTRIBUTE INTEGER DEFAULT 0");
//onCreate(db);
/*try {
Message.message(context,"OnUpgrade");
db.execSQL(DROP_TABLE);
onCreate(db);
}catch (Exception e) {
Message.message(context,""+e);*/
}
}
}
My logcat for the error is below this line. I am not sure why my result is empty or why nothing is being put in the buffer.
11-27 22:43:28.898 4502-4502/com.example.android.androidcraftsappprototype E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.android.androidcraftsappprototype, PID: 4502
android.database.CursorIndexOutOfBoundsException: Index 0 requested, with a size of 0
at android.database.AbstractCursor.checkPosition(AbstractCursor.java:468)
at android.database.AbstractWindowedCursor.checkPosition(AbstractWindowedCursor.java:136)
at android.database.AbstractWindowedCursor.getString(AbstractWindowedCursor.java:50)
at com.example.android.androidcraftsappprototype.DBAdapter.getData(DBAdapter.java:86)
at com.example.android.androidcraftsappprototype.SetupPage$2.onClick(SetupPage.java:118)
at android.view.View.performClick(View.java:6294)
at android.view.View$PerformClick.run(View.java:24770)
at android.os.Handler.handleCallback(Handler.java:790)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6494)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)

i think your course return 0 item according to query..so you should write below condition
cursor.moveToFirst(); <--- instead of this
if(cursor.moveToFirst()){
// here all your code
}

Separating a quiz questions into different groups

I've searched a lot for this question but can't seem to actually find an answer. My quiz app works well, but I realized that 50 questions all at once were too many.
Right now, my app works by people clicking a button that says "Begin" and they enter the quiz. After the quiz, all of the questions that they got wrong are shown with the correct answer. However, what I'd like to do is group these into questions of 10. So, select "Question Set 1" Button, "Question Set 2" Button, etc. Then, I'd still like to show the correct answer to the questions contained in this question set.
I'm not actually sure how to separate the questions and have my logic still work. Below I've included by database helper class. I've exempted most of the questions to shorten it. Thank you so much!
public class DbHelper extends SQLiteOpenHelper {
private static final int DATABASE_VERSION = 1;
// Database Name
private static final String DATABASE_NAME = "realEstateQuiz";
// tasks table name
private static final String TABLE_QUEST = "quest";
// tasks Table Columns names
private static final String KEY_ID = "questionId";
private static final String KEY_QUES = "question";
private static final String KEY_ANSWER = "answer"; // correct option
private static final String KEY_OPTA = "opta"; // option a
private static final String KEY_OPTB = "optb"; // option b
private static final String KEY_OPTC = "optc"; // option c
private static final String KEY_OPTD = "optd"; // option d
private SQLiteDatabase dbase;
public DbHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
#Override
public void onCreate(SQLiteDatabase db) {
dbase = db;
String sql = "CREATE TABLE IF NOT EXISTS " + TABLE_QUEST + " ( " + KEY_ID
+ " INTEGER PRIMARY KEY AUTOINCREMENT, " + KEY_QUES + " TEXT, " + KEY_ANSWER + " TEXT, " + KEY_OPTA
+ " TEXT, " + KEY_OPTB + " TEXT, " + KEY_OPTC + " TEXT," + KEY_OPTD + " TEXT)";
db.execSQL(sql);
addQuestions(db);
// db.close();
}
private void addQuestions(SQLiteDatabase db) {
Question q1 = new Question(
"When a real estate professional exaggerates " + "about a parcel of property, they are likely:",
"Misrepresenting the property", "Guilty of fraud", "Puffing", "All of the above", "Puffing");
this.addQuestion(q1, db);
}
#Override
public void onUpgrade(SQLiteDatabase db, int oldV, int newV) {
// Drop older table if existed
db.execSQL("DROP TABLE IF EXISTS " + TABLE_QUEST);
// Create tables again
onCreate(db);
}
// Adding new question
public void addQuestion(Question quest, SQLiteDatabase db) {
ContentValues values = new ContentValues();
values.put(KEY_QUES, quest.getQuestion());
values.put(KEY_ANSWER, quest.getAnswer());
values.put(KEY_OPTA, quest.getOpta());
values.put(KEY_OPTB, quest.getOptb());
values.put(KEY_OPTC, quest.getOptc());
values.put(KEY_OPTD, quest.getOptd());
// Inserting Row
db.insert(TABLE_QUEST, null, values);
}
public List<Question> getAllQuestions() {
List<Question> quesList = new ArrayList<Question>();
// Select All Query
String selectQuery = "SELECT * FROM " + TABLE_QUEST;
dbase = this.getReadableDatabase();
Cursor cursor = dbase.rawQuery(selectQuery, null);
// looping through all rows and adding to list
if (cursor.moveToFirst()) {
do {
Question quest = new Question();
quest.setQuestionId(cursor.getInt(0));
quest.setQuestion(cursor.getString(1));
quest.setAnswer(cursor.getString(2));
quest.setOpta(cursor.getString(3));
quest.setOptb(cursor.getString(4));
quest.setOptc(cursor.getString(5));
quest.setOptd(cursor.getString(6));
quesList.add(quest);
} while (cursor.moveToNext());
}
// return quest list
cursor.close();
dbase.close();
return quesList;
}
public int rowcount() {
int row = 0;
String selectQuery = "SELECT * FROM " + TABLE_QUEST;
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery(selectQuery, null);
row = cursor.getCount();
cursor.close();
return row;
}
}

It seems to me that your Question objects and corresponding table should contain an additional field which indicates which Question Set they belong to. Your DbHelper class should then beable to query Questions by set. Or alternatively you could sort all Questions by their set in the java code, but I would prefer to leave that to the db.
However, If you wish to divide all the questions into sets of 10 you could try something like the following:
List<Set<Question>> questionSets = new ArrayList<Set<Question>>();
Set<Question> questionSet = new HashSet<Question>();
questionSets.add(questionSet);
int counter = 0;
for(Question question : dbHelper.getAllQuestions()){
if(++counter > 10){
counter = 0;
questionSet = new HashSet<Question>();
questionSets.add(questionSet);
}
questionSet.add(question);
}
This will collect ten questions into a Set and the add them to the list of Question Sets. You could then access each question set from that list.

Sql query is not working for SQLite database in android

i am new to android. i want to execute a sql query of selecting data with id 1 to 10.The query i m using is running successfully on DB browser for sqlite but not in the code. ab and bc are static variables of class catogaries.please help.
public class QuizHelper extends SQLiteOpenHelper {
private static final int DATABASE_VERSION =1;
// Database Name
private static final String DATABASE_NAME = "bcd";
// tasks table name
private static final String TABLE_QUEST = "quest";
// tasks Table Columns names
private static final String KEY_ID = "qid";
private static final String KEY_QUES = "question";
private static final String KEY_ANSWER = "answer"; // correct option
private static final String KEY_OPTA = "opta"; // option a
private static final String KEY_OPTB = "optb"; // option b
private static final String KEY_OPTC = "optc"; // option c
private SQLiteDatabase dbase;
public QuizHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
#Override
public void onCreate(SQLiteDatabase db) {
dbase = db;
String sql = "CREATE TABLE IF NOT EXISTS " + TABLE_QUEST + " ( "
+ KEY_ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " + KEY_QUES
+ " TEXT, " + KEY_ANSWER + " TEXT, " + KEY_OPTA + " TEXT, "
+ KEY_OPTB + " TEXT, " + KEY_OPTC + " TEXT)";
db.execSQL(sql);
addQuestion();
// db.close();
}
private void addQuestion() {
Question q1 = new Question("Who is the president of india ?",
"narender modi", "hamid ansari", "pranab mukherji", "pranab
mukherji");
this.addQuestion(q1);
Question q2 = new Question(" Name of the first university of India
?", "Nalanda University", "Takshshila University", "BHU", "Nalanda
University");
this.addQuestion(q2);
Question q3 = new Question("Which college is awarded as Outstanding
Engineering Institute North Award”?", "Thapar University",
"G.N.D.E.C", "S.L.I.E.T", "G.N.D.E.C");
this.addQuestion(q3);
Question q4 = new Question("Name of the first Aircraft Carrier Indian
Ship ?", "Samudragupt", "I.N.S. Vikrant", "I.N.S Virat", "I.N.S.
Vikrant");
this.addQuestion(q4);
Question q5 = new Question("In which town of Punjab the largest grain
market of Asia is Available?", "Bathinda", "Khanna", "Ludhiana",
"Khanna");
this.addQuestion(q5);
Question q6 = new Question("Which is the highest dam in India?",
"Bhakhra Dam", "Hirakud Dam", "Tehri Dam", "Tehri Dam");
this.addQuestion(q6);
Question q7 = new Question("Which Indian state is having longest
coastline ?", "Rajasthan", "Gujrat", "Punjab", "Gujrat");
this.addQuestion(q7);
Question q8 = new Question("Name of the first Country to print books
?", "China", "India", "USA", "China");
this.addQuestion(q8);
Question q9 = new Question("Study of the Universe is known as?",
"Sociology", "Cosmology", "Petology", "Cosmology");
this.addQuestion(q9);
Question q10 = new Question("Big Bang theory explains ?", "Origin of
Universe.", "Origin of Sun", "Laws of physics.", "Origin of
Universe.");
this.addQuestion(q10);
Question q11 = new Question("Which Planet is dwarf planet?",
"Mercury", "Pluto", "Venus", "Pluto");
this.addQuestion(q11);
}
#Override
public void onUpgrade(SQLiteDatabase db, int oldV, int newV) {
// Drop older table if existed
db.execSQL("DROP TABLE IF EXISTS " + TABLE_QUEST);
// Create tables again
onCreate(db);
}
// Adding new question
public void addQuestion(Question quest) {
// SQLiteDatabase db = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(KEY_QUES, quest.getQUESTION());
values.put(KEY_ANSWER, quest.getANSWER());
values.put(KEY_OPTA, quest.getOPTA());
values.put(KEY_OPTB, quest.getOPTB());
values.put(KEY_OPTC, quest.getOPTC());
// Inserting Row
dbase.insert(TABLE_QUEST, null, values);
}
public List<Question> getAllQuestions() {
List<Question> quesList = new ArrayList<Question>();
// Select All Query
String selectQuery = "SELECT * FROM " + TABLE_QUEST + "WHERE" + KEY_ID + "BETWEEN" + catogaries.bc + "AND" +catogaries.ab;
dbase = this.getReadableDatabase();
Cursor cursor = dbase.rawQuery(selectQuery, null);
// looping through all rows and adding to list
if (cursor.moveToFirst()) {
do {
Question quest = new Question();
quest.setID(cursor.getInt(0));
quest.setQUESTION(cursor.getString(1));
quest.setANSWER(cursor.getString(2));
quest.setOPTA(cursor.getString(3));
quest.setOPTB(cursor.getString(4));
quest.setOPTC(cursor.getString(5));
quesList.add(quest);
} while (cursor.moveToNext());
}
// return quest list
return quesList;
}
Error Log
04-05 15:00:28.452 31300-31300/com.example.chaitanya.myquiz
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.chaitanya.myquiz, PID: 31300
java.lang.RuntimeException: Unable to start activity
ComponentInfo
{com.example.chaitanya.myquiz.QuestionActivity}:
android.database.sqlite.SQLiteException: no such table:
questWHEREqidBETWEEN0AND10 (code 1): , while compiling:
SELECT* FROM questWHEREqidBETWEEN0AND10
at
android.app.ActivityThread.performLaunchActivity
(ActivityThread.java:2305)
at
android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2365)
at android.app.ActivityThread.access$800(ActivityThread.java:147)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1283)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5237)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:707)
Caused by: android.database.sqlite.SQLiteException: no such table: questWHEREqidBETWEEN0AND10 (code 1): , while compiling: SELECT * FROM questWHEREqidBETWEEN0AND10
at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)

Focus on the Exception:
no such table: questWHEREqidBETWEEN0AND10
You are missing space between table name , Where clause , And keyword etc . so the query makes it a whole string
use:
String selectQuery = "SELECT * FROM " + TABLE_QUEST + " WHERE " + KEY_ID + " BETWEEN " + catogaries.bc + " AND " +catogaries.ab;

Unable to make more than 2 columns in SQLite Android Eclipse?

Why is that when i have more than 3 columns the app crashes? I tried debugging it by commenting out one column and it runs perfectly. After debugging it some more I found out that the problem might be on the 'populateListview' because I was able to run the app but now it won't display anything. Why do you think I couldn't run it with more than 3 columns?
Here's my dbAdapter:
// Field Names:
public static final String KEY_ROWID = "_id";
public static final String KEY_INGREDIENTNAME = "ingredientname";
public static final String KEY_IMAGE = "image";
public static final String KEY_DETAILS = "details";
public static final String[] ALL_KEYS = new String[] {KEY_ROWID, KEY_INGREDIENTNAME, KEY_IMAGE, KEY_DETAILS};
// Column Numbers for each Field Name:
public static final int COL_ROWID = 0;
public static final int COL_INGREDIENTNAME = 1;
public static final int COL_IMAGE = 2;
public static final int COL_DETAILS = 3;
//SQL statement to create database
private static final String DATABASE_CREATE_SQL =
"CREATE TABLE " + DATABASE_TABLE
+ " (" + KEY_ROWID + " INTEGER PRIMARY KEY AUTOINCREMENT, "
+ KEY_INGREDIENTNAME + " TEXT NOT NULL, "
+ KEY_IMAGE + " TEXT"
+ KEY_DETAILS + " TEXT"
+ ");";
// Add a new set of values to be inserted into the database.
public long insertRow(String ingredientname, String image, String detailsValue) {
ContentValues initialValues = new ContentValues();
initialValues.put(KEY_INGREDIENTNAME, ingredientname);
initialValues.put(KEY_IMAGE, image);
initialValues.put(KEY_DETAILS, detailsValue);
// Insert the data into the database.
return db.insert(DATABASE_TABLE, null, initialValues);
}
// 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;
}
Here's my populateListView Code:
private void populateListView() {
Cursor cursor = myDb.getAllRows();
String[] fromFieldNames = new String[] { //DBAdapter.KEY_ROWID,
DBAdapter.KEY_INGREDIENTNAME };
int[] toViewIDs = new int[] { //R.id.textViewItemNumber,
R.id.textViewItemTask };
SimpleCursorAdapter myCursorAdapter;
myCursorAdapter = new SimpleCursorAdapter(getBaseContext(),
R.layout.item_layout, cursor, fromFieldNames, toViewIDs, 0);
ListView myList = (ListView) findViewById(R.id.listViewTask);
myList.setAdapter(myCursorAdapter);
}

You miss a comma, here:
private static final String DATABASE_CREATE_SQL =
"CREATE TABLE " + DATABASE_TABLE
+ " (" + KEY_ROWID + " INTEGER PRIMARY KEY AUTOINCREMENT, "
+ KEY_INGREDIENTNAME + " TEXT NOT NULL, "
+ KEY_IMAGE + " TEXT"
+ KEY_DETAILS + " TEXT"
+ ");";
It should be
private static final String DATABASE_CREATE_SQL =
"CREATE TABLE " + DATABASE_TABLE
+ " (" + KEY_ROWID + " INTEGER PRIMARY KEY AUTOINCREMENT, "
+ KEY_INGREDIENTNAME + " TEXT NOT NULL, "
+ KEY_IMAGE + " TEXT,"
+ KEY_DETAILS + " TEXT"
+ ");";