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eclipse calling database error

I want to add word from the insert.java class to the database translate.sql in the assets folder, but when i click the button for insert.java in the emulator it keeps shutdown unexpectedly.
I already search and trying to resolve this but seems it keep coming.
So i need help to identify the error in the code or some misspelling name from the database or others..
this is the class for insert.java
package com.han;
import android.app.Activity;
//import android.app.AlertDialog;
//import android.content.DialogInterface;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class Insert extends Activity {
public Button search, add, back;
public EditText indo;
public EditText tora;
public Cursor mCursor;
public DbHelper helper;
public String insertkataindonesia, insertkatatora;
public int id,temp_id;
public SQLiteDatabase db = null;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_insert);
helper = new DbHelper(this);
db = helper.getWritableDatabase();
mCursor = helper.getAll();
search = (Button) findViewById(R.id.btnSearch);
add = (Button) findViewById(R.id.btnAdd);
back = (Button) findViewById(R.id.btnBack);
indo = (EditText) findViewById(R.id.insertBahasaIndonesia);
tora = (EditText) findViewById(R.id.insertBahasaTora);
add.setEnabled(false);
search.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick (View v){
String result = "";
insertkataindonesia = indo.getText().toString().toLowerCase();
mCursor = db.rawQuery("SELECT _id,kata_indo, kata_tora FROM translate " + "WHERE kata_indo = '"+insertkataindonesia+"' ORDER BY kata_indo",null);
if(mCursor.moveToFirst()){
result = mCursor.getString(2);
for
(;!mCursor.isAfterLast();mCursor.moveToNext()){
result = mCursor.getString(2);
}
}
if (result.equals("")){
result = "";
Toast.makeText(Insert.this,"Kata tidak ditemukan, silahkan tambahkan kata", Toast.LENGTH_LONG).show();
add.setEnabled(true);
}
tora.setText(result);
}});
add.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick (View v){
insertkataindonesia = indo.getText().toString().toLowerCase();
insertkatatora = tora.getText().toString().toLowerCase();
if (insertkatatora.equals("") && insertkataindonesia.equals("")){
Toast.makeText(Insert.this,"Tidak ada kata untuk disimpan", Toast.LENGTH_LONG).show();
}
else if (insertkatatora.equals("")){
Toast.makeText(Insert.this,"Tidak ada kata toraja untuk disimpan", Toast.LENGTH_LONG).show();
}
else if (insertkataindonesia.equals("")){
Toast.makeText(Insert.this,"Tidak ada kata Indonesia untuk disimpan", Toast.LENGTH_LONG).show();
}
else if (id==-1){
Toast.makeText(Insert.this,"Kata sudah ada di database, silahkan hapus dulu", Toast.LENGTH_LONG).show();
}
else{
helper.insertKey(insertkataindonesia, insertkatatora);
Toast.makeText(Insert.this,"Kata telah disimpan", Toast.LENGTH_SHORT).show();
indo.setText("");
tora.setText("");
}
}
});
back.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick (View v){
Intent menu = new Intent(Insert.this,
MainActivity.class);
menu.putExtra("pesan", "From Insert Menu");
startActivity(menu);
}
});
}
}
and this is the class for dbhelper.java
package com.han;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import android.content.ContentValues;
import android.content.Context;
import android.content.res.AssetManager;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteException;
import android.database.sqlite.SQLiteOpenHelper;
public class DbHelper extends SQLiteOpenHelper {
private static final String DATABASE_NAME="translate.sql";
public static final String KEY_ROWID = "_id";
private static final int VERSION = 1;
private static File DATABASE_FILE;
private boolean mInvalidDatabaseFile = false;
private boolean mIsUpgraded = false;
private Context mContext;
private int mOpenConnections = 0;
private static DbHelper mInstance;
synchronized static public DbHelper getInstance(Context context) {
if (mInstance == null) {
mInstance = new
DbHelper(context.getApplicationContext());
}
return mInstance;
}
public DbHelper(Context context) {
super(context, DATABASE_NAME, null, VERSION);
this.mContext = context;
SQLiteDatabase db = null;
try {
db = getReadableDatabase();
if (db != null) {
db.close();
}
DATABASE_FILE =
context.getDatabasePath(DATABASE_NAME);
if (mInvalidDatabaseFile) {
copyDatabase();
}
if (mIsUpgraded) {
doUpgrade();
}
}catch (SQLiteException e) {
} finally {
if (db != null && db.isOpen()) {
db.close();
}
}
}
#Override
public void onCreate(SQLiteDatabase db) {
mInvalidDatabaseFile = true;
}
#Override
public void onUpgrade(SQLiteDatabase database, int old_version,
int new_version) {
mInvalidDatabaseFile = true;
mIsUpgraded = true;
}
private void doUpgrade() {
}
#Override
public synchronized void onOpen(SQLiteDatabase db) {
super.onOpen(db);
mOpenConnections++;
if (!db.isReadOnly()) {
db.execSQL("PRAGMA foreign_keys=ON;");
}
}
#Override
public synchronized void close() {
mOpenConnections--;
if (mOpenConnections == 0) {
super.close();
}
}
private void copyDatabase() {
AssetManager assetManager =
mContext.getResources().getAssets();
InputStream in = null;
OutputStream out = null;
try {
in = assetManager.open(DATABASE_NAME);
out = new FileOutputStream(DATABASE_FILE);
byte[] buffer = new byte[1024];
int read = 0;
while ((read = in.read(buffer)) != -1) {
out.write(buffer, 0, read);
}
} catch (IOException e) {
} finally {
if (in != null) {
try {
in.close();
} catch
(IOException e) {}
}
if (out != null) {
try {
out.close();
} catch (IOException e) {}
}
}
setDatabaseVersion();
mInvalidDatabaseFile = false;
}
private void setDatabaseVersion() {
SQLiteDatabase db = null;
try {
db = SQLiteDatabase.openDatabase(DATABASE_FILE.getAbsolutePath(), null, SQLiteDatabase.OPEN_READWRITE);
db.execSQL("PRAGMA user_version = " + VERSION);
} catch (SQLiteException e ) {
} finally {
if (db != null && db.isOpen()) {
db.close();
}
}
}
public Cursor getAll (){
return(getReadableDatabase().rawQuery("SELECT _id, kata_indo, kata_tora from translate ORDER BY _id ASC",null));
}
public void insertKey(String indo, String tora){
ContentValues cv = new ContentValues();
cv.put("kata_indo", indo);
cv.put("kata_tora", tora);
getWritableDatabase().insert("translate","kata_indo", cv);
}
public void delete(long id){
getWritableDatabase().delete("translate", KEY_ROWID + "=" + id, null);
}
}
and here is the logcat
11-18 00:16:38.489: E/AndroidRuntime(396): FATAL EXCEPTION: main
11-18 00:16:38.489: E/AndroidRuntime(396): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.han/com.han.Insert}: android.database.sqlite.SQLiteException: no such table: translate: , while compiling: SELECT _id, kata_indo, kata_tora from translate ORDER BY _id ASC
11-18 00:16:38.489: E/AndroidRuntime(396): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
11-18 00:16:38.489: E/AndroidRuntime(396): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
11-18 00:16:38.489: E/AndroidRuntime(396): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
11-18 00:16:38.489: E/AndroidRuntime(396): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
11-18 00:16:38.489: E/AndroidRuntime(396): at android.os.Handler.dispatchMessage(Handler.java:99)
11-18 00:16:38.489: E/AndroidRuntime(396): at android.os.Looper.loop(Looper.java:123)
11-18 00:16:38.489: E/AndroidRuntime(396): at android.app.ActivityThread.main(ActivityThread.java:4627)
11-18 00:16:38.489: E/AndroidRuntime(396): at java.lang.reflect.Method.invokeNative(Native Method)
11-18 00:16:38.489: E/AndroidRuntime(396): at java.lang.reflect.Method.invoke(Method.java:521)
11-18 00:16:38.489: E/AndroidRuntime(396): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
11-18 00:16:38.489: E/AndroidRuntime(396): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
11-18 00:16:38.489: E/AndroidRuntime(396): at dalvik.system.NativeStart.main(Native Method)
11-18 00:16:38.489: E/AndroidRuntime(396): Caused by: android.database.sqlite.SQLiteException: no such table: translate: , while compiling: SELECT _id, kata_indo, kata_tora from translate ORDER BY _id ASC
11-18 00:16:38.489: E/AndroidRuntime(396): at android.database.sqlite.SQLiteCompiledSql.native_compile(Native Method)
11-18 00:16:38.489: E/AndroidRuntime(396): at android.database.sqlite.SQLiteCompiledSql.compile(SQLiteCompiledSql.java:91)
11-18 00:16:38.489: E/AndroidRuntime(396): at android.database.sqlite.SQLiteCompiledSql.<init>(SQLiteCompiledSql.java:64)
11-18 00:16:38.489: E/AndroidRuntime(396): at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:80)
11-18 00:16:38.489: E/AndroidRuntime(396): at android.database.sqlite.SQLiteQuery.<init>(SQLiteQuery.java:46)
11-18 00:16:38.489: E/AndroidRuntime(396): at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:42)
11-18 00:16:38.489: E/AndroidRuntime(396): at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1345)
11-18 00:16:38.489: E/AndroidRuntime(396): at android.database.sqlite.SQLiteDatabase.rawQuery(SQLiteDatabase.java:1315)
11-18 00:16:38.489: E/AndroidRuntime(396): at com.han.DbHelper.getAll(DbHelper.java:149)
11-18 00:16:38.489: E/AndroidRuntime(396): at com.han.Insert.onCreate(Insert.java:31)
11-18 00:16:38.489: E/AndroidRuntime(396): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
11-18 00:16:38.489: E/AndroidRuntime(396): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
Appreciate your help.

This error: no such table: translate, when you are SURE that the table's name and the request are written properly, typically means that you are working on an empty DB or that a table is missing because the creation of this one failed for some reasons.
For example I'm sure that there is the first access you make to the database right for this table? If you select something you will see that you have no table or data.
This error come from an error while creating the db. Basically what most of the apps are doing is creating an empty db in the device and then copying the content of the one provided with the app, in your asset folder, to the empty one. However if there is an error in the process the copy is cancelled and your database remains empty. If you create all the db programmatically it should mean that the table creation failed.
Try to Select * on your db to see if there is content or not, then check your db creation process. You'll probably find out that one of your tables is missing, or that the creation of the db failed.

RuntimeError while retriving data from sqlite database in android

I'm trying to insert and retrieve data from database in eclipse using sqlite, but it shows a RuntimeError. I create a layout with three edit texts and one button to create simple information from but nothing is created. I create java database with the following code:
package com.example.databasetest;
import android.content.ContentValues;
import android.content.Context;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;
public class DBHelper extends SQLiteOpenHelper{
private static final int DATABASE_VERSION = 1;
private static final String DATABASE_NAME = "teacher";
private static final String TABLE_NAME = "teacher_table";
private static final String NAME = "teacher_name";
private static final String FATHER_NAME = "father_name";
private static final String MOTHER_NAME = "mother_name";
SQLiteDatabase data=this.getWritableDatabase();
Context ctx;
public DBHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
ctx=context;
Log.d("DATABASE OPERATION", "DATABASE CREATED");
}
#Override
public void onCreate(SQLiteDatabase db) {
data=db;
db.execSQL("CREATE TABLE " + TABLE_NAME + " ("
+ NAME + " TEXT,"
+ FATHER_NAME + " TEXT,"
+ MOTHER_NAME + " INTEGER,"
+ ");");
Log.d("DATABASE OPERATION", "TABLE CREATED");
}
public void open() throws SQLException
{
DBHelper db1 = new DBHelper(ctx);
data = db1.getWritableDatabase();
}
public void close()
{
data.close();
}
#Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
db.execSQL("DROP TABLE IF EXCEPTION EXISTS");
onCreate(db);
}
public void onInsert(DBHelper db,String name,String f_name, String m_name)
{
SQLiteDatabase sql= db.getWritableDatabase();
ContentValues cv=new ContentValues();
cv.put("teacher_name",name);
cv.put("father_name", f_name);
cv.put("mother_name", m_name);
sql.insert(TABLE_NAME, null, cv);
Log.d("DATABASE OPERATION", "ONE ROW INSERTED.....");
}
}
AND java file as...
package com.example.databasetest;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class MainActivity extends Activity {
EditText NAME,FATHER,MOTHER,ID;
String name,father,mother,id;
int i=1;
Button save;
Context ctxx;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
NAME=(EditText)findViewById(R.id.name);
FATHER=(EditText)findViewById(R.id.father_name);
MOTHER=(EditText)findViewById(R.id.mother_name);
ID=(EditText)findViewById(R.id.emp_id);
save=(Button)findViewById(R.id.submit);
save.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
id=ID.getText().toString();
name=NAME.getText().toString();
father=FATHER.getText().toString();
mother=MOTHER.getText().toString();
if(id.equals(i))
{
Toast.makeText(getBaseContext(), "not allow insertion", Toast.LENGTH_LONG).show();
}
else
{
DBHelper DB=new DBHelper(ctxx);
DB.open();
DB.onInsert(DB, name, father, mother);
Toast.makeText(getBaseContext(), "insertion sucessful", Toast.LENGTH_LONG).show();
finish();
}
}
});
}
}
and its show run time error when i click on button as in log cat..
05-08 02:54:05.932: D/AndroidRuntime(922): Shutting down VM
05-08 02:54:05.999: W/dalvikvm(922): threadid=1: thread exiting with uncaught exception (group=0x41465700)
05-08 02:54:06.189: E/AndroidRuntime(922): FATAL EXCEPTION: main
05-08 02:54:06.189: E/AndroidRuntime(922): java.lang.NullPointerException
05-08 02:54:06.189: E/AndroidRuntime(922): at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:224)
05-08 02:54:06.189: E/AndroidRuntime(922): at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:164)
05-08 02:54:06.189: E/AndroidRuntime(922): at com.example.databasetest.DBHelper.<init>(DBHelper.java:22)
05-08 02:54:06.189: E/AndroidRuntime(922): at com.example.databasetest.MainActivity$1.onClick(MainActivity.java:49)
05-08 02:54:06.189: E/AndroidRuntime(922): at android.view.View.performClick(View.java:4240)
05-08 02:54:06.189: E/AndroidRuntime(922): at android.view.View$PerformClick.run(View.java:17721)
05-08 02:54:06.189: E/AndroidRuntime(922): at android.os.Handler.handleCallback(Handler.java:730)
05-08 02:54:06.189: E/AndroidRuntime(922): at android.os.Handler.dispatchMessage(Handler.java:92)
05-08 02:54:06.189: E/AndroidRuntime(922): at android.os.Looper.loop(Looper.java:137)
05-08 02:54:06.189: E/AndroidRuntime(922): at android.app.ActivityThread.main(ActivityThread.java:5103)
05-08 02:54:06.189: E/AndroidRuntime(922): at java.lang.reflect.Method.invokeNative(Native Method)
05-08 02:54:06.189: E/AndroidRuntime(922): at java.lang.reflect.Method.invoke(Method.java:525)
05-08 02:54:06.189: E/AndroidRuntime(922): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
05-08 02:54:06.189: E/AndroidRuntime(922): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
05-08 02:54:06.189: E/AndroidRuntime(922): at dalvik.system.NativeStart.main(Native Method)
05-08 02:54:09.589: I/Process(922): Sending signal. PID: 922 SIG: 9

ctxx is never initialzed, and this probably the cause of the crash. Generally speaking, when you deal with Activity and Fragment subclass, you almost never need to keep a reference to the Context. Activity is a subclass of Context, and usually this is enough. In a Fragment you can retrieve the context of the Activity hosting the Fragment with getActivity()
Chante
DBHelper DB=new DBHelper(ctxx);
with
DBHelper DB=new DBHelper(MainActivity.this);
As #DerGolem pointed out, you are using the type INTEGER for the column MOTHER_NAME. Probably you want to use TEXT, instead, and you will also need a the primary key "_id"
db.execSQL("CREATE TABLE " + TABLE_NAME + " ("
+ BaseColumns._ID + " INTEGER PRIMARY KEY AUTOINCREMENT, "
+ NAME + " TEXT,"
+ FATHER_NAME + " TEXT,"
+ MOTHER_NAME + " TEXT"
+ ");");

In your activity initialize the ctxx in onCreate:
ctxx=this;
or
DBHelper DB=new DBHelper(MainActivity.this);
whenever you will initialize database object will null you will get sqlite locked exception.

Also fixe this
public void onCreate(SQLiteDatabase db) {
data=db;
db.execSQL("CREATE TABLE " + TABLE_NAME + " ("
+ NAME + " TEXT,"
+ FATHER_NAME + " TEXT,"
+ MOTHER_NAME + " TEXT"
+ ");");
Log.d("DATABASE OPERATION", "TABLE CREATED");
}
for "INTEGER," remove ,.
and intialise it like this DBHelper.
DBHelper DB=new DBHelper(MainActivity.this);

You need init ctxx in onCreate() method:
ctxx = this;
If you want to know more about sqlite on android -> ok. But if you want to less code you can try some SqliteLibrary for android. (example ActiveAndroid, GreenDAO.....).

android: trying to add counter information to sqlite database

I'm made a counter app and I want to add a save function where it saves the current number of the counter into the database. But when I try to run it, its closes unexpectedly.
The logcat and code is below
package com.example.testdatabase;
import android.app.Activity;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class MainActivity extends Activity {
int counter;
Button add;
Button sub;
Button save;
TextView display;
private SharedPreferences prefs;
private String prefName = "MyPref";
MySQLiteHelper db = new MySQLiteHelper(this);
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
counter = 0;
add = (Button) findViewById(R.id.button1);
sub = (Button) findViewById(R.id.button2);
display = (TextView) findViewById(R.id.tvDisplay);
add.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
counter++;
display.setText("Counter: " + counter);
}
});
sub.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
counter--;
display.setText("Counter: " + counter);
}
});
save.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
db.add(counter);
}
});
}
protected void onPause()
{
super.onPause();
prefs = getSharedPreferences(prefName, MODE_PRIVATE);
SharedPreferences.Editor edit = prefs.edit();
edit.putInt("counter", counter);
edit.commit();
}
protected void onResume()
{
super.onResume();
prefs = getSharedPreferences(prefName, MODE_PRIVATE);
counter = prefs.getInt("counter", counter);
display.setText("Counter: " + counter);
}
}
the class the handles the database stuff
package com.example.testdatabase;
import android.content.ContentValues;
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
public class MySQLiteHelper extends SQLiteOpenHelper {
// Database Version
private static final int DATABASE_VERSION = 1;
// Database Name
private static final String DATABASE_NAME = "CountDB";
public MySQLiteHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
#Override
public void onCreate(SQLiteDatabase db) {
// SQL statement to create counter table
String CREATE_COUNT_TABLE = "CREATE TABLE count ( " +
"id INTEGER PRIMARY KEY AUTOINCREMENT, " +
"amount INT )";
// create books table
db.execSQL(CREATE_COUNT_TABLE);
}
#Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// Drop older counter table if existed
db.execSQL("DROP TABLE IF EXISTS count");
// create fresh count table
this.onCreate(db);
}
// Books table name
private static final String TABLE_COUNTER= "count";
// Books Table Columns names
private static final String KEY_ID = "id";
private static final String KEY_AMOUNT = "amount";
private static final String[] COLUMNS = {KEY_ID,KEY_AMOUNT};
public void add(int counter){
// 1. get reference to writable DB
SQLiteDatabase db = this.getWritableDatabase();
// 2. create ContentValues to add key "column"/value
ContentValues values = new ContentValues();
values.put(KEY_AMOUNT, counter); // get counter amount
// 3. insert
db.insert(TABLE_COUNTER, // table
null, //nullColumnHack
values); // key/value -> keys = column names/ values = column values
// 4. close
db.close();
}
the logcat
15:08:30.713: D/AndroidRuntime(302): Shutting down VM
11-17 15:08:30.713: W/dalvikvm(302): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
11-17 15:08:30.742: E/AndroidRuntime(302): FATAL EXCEPTION: main
11-17 15:08:30.742: E/AndroidRuntime(302): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.testdatabase/com.example.testdatabase.MainActivity}: java.lang.NullPointerException
11-17 15:08:30.742: E/AndroidRuntime(302): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
11-17 15:08:30.742: E/AndroidRuntime(302): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
11-17 15:08:30.742: E/AndroidRuntime(302): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
11-17 15:08:30.742: E/AndroidRuntime(302): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
11-17 15:08:30.742: E/AndroidRuntime(302): at android.os.Handler.dispatchMessage(Handler.java:99)
11-17 15:08:30.742: E/AndroidRuntime(302): at android.os.Looper.loop(Looper.java:123)
11-17 15:08:30.742: E/AndroidRuntime(302): at android.app.ActivityThread.main(ActivityThread.java:4627)
11-17 15:08:30.742: E/AndroidRuntime(302): at java.lang.reflect.Method.invokeNative(Native Method)
11-17 15:08:30.742: E/AndroidRuntime(302): at java.lang.reflect.Method.invoke(Method.java:521)
11-17 15:08:30.742: E/AndroidRuntime(302): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
11-17 15:08:30.742: E/AndroidRuntime(302): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
11-17 15:08:30.742: E/AndroidRuntime(302): at dalvik.system.NativeStart.main(Native Method)
11-17 15:08:30.742: E/AndroidRuntime(302): Caused by: java.lang.NullPointerException
11-17 15:08:30.742: E/AndroidRuntime(302): at com.example.testdatabase.MainActivity.onCreate(MainActivity.java:49)
11-17 15:08:30.742: E/AndroidRuntime(302): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
11-17 15:08:30.742: E/AndroidRuntime(302): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
11-17 15:08:30.742: E/AndroidRuntime(302): ... 11 more
any ideas?

Program throws an exception in :
save.setOnClickListener(new View.OnClickListener() ...
It seems that Button save is not initialized.

Android Java IllegalStateException: Could not execute method of the activity

I'm trying to code a simple randomizer app. I had the randomizer button working, but then I changed some code (which I thought was irrelevant to the randomizer button) and it started crashing and getting the "IllegalStateException: Could not execute method of the activity" error. From what I can tell, this error is very specific to what the code is, because I could not find any answers that fit my code.
package com.example.randomgamechooser;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.widget.TextView;
public class MainScreen extends Activity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_screen);
}
public void chooseGame (View view) {
GameList dbUtil = new GameList(this);
dbUtil.open();
String string = dbUtil.getRandomEntry();
//TextView textView = new TextView(this);
TextView textView = (TextView) findViewById(R.id.chosenbox);
textView.setTextSize(40);
textView.setText(string);
//setContentView (textView);
dbUtil.close();
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main_screen, menu);
return true;
}
//starts the Game Selection activity
public void openGames (View view) {
Intent intent = new Intent(this, GameSelction.class);
startActivity(intent);
}
}
And this is the referenced GameList class
package com.example.randomgamechooser;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;
import java.util.Random;
public class GameList {
private static final String TAG = "GameList";
//database name
private static final String DATABASE_NAME = "game_list";
//database version
private static final int DATABASE_VERSION = 1;
//table name
private static final String DATABASE_TABLE = "game_list";
//table columns
public static final String KEY_NAME = "name";
public static final String KEY_GENRE = "genre";
public static final String KEY_ROWID = "_id";
//database creation sql statement
private static final String CREATE_GAME_TABLE =
"create table " + DATABASE_TABLE + " (" + KEY_ROWID + " integer primary key autoincrement, "
+ KEY_NAME +" text not null, " + KEY_GENRE + " text not null);";
//Context
private final Context mCtx;
private DatabaseHelper mDbHelper;
private static SQLiteDatabase mDb;
//Inner private class. Database Helper class for creating and updating database.
private static class DatabaseHelper extends SQLiteOpenHelper {
DatabaseHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
// onCreate method is called for the 1st time when database doesn't exists.
#Override
public void onCreate(SQLiteDatabase db) {
Log.i(TAG, "Creating DataBase: " + CREATE_GAME_TABLE);
db.execSQL(CREATE_GAME_TABLE);
}
//onUpgrade method is called when database version changes.
#Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
Log.w(TAG, "Upgrading database from version " + oldVersion + " to "
+ newVersion);
}
}
//Constructor - takes the context to allow the database to be opened/created
//#param ctx the Context within which to work
public GameList(Context ctx) {
this.mCtx = ctx;
}
//This method is used for creating/opening connection
//#return instance of GameList
//#throws SQLException
public GameList open() throws SQLException {
mDbHelper = new DatabaseHelper(mCtx);
mDb = mDbHelper.getWritableDatabase();
return this;
}
//This method is used for closing the connection.
public void close() {
mDbHelper.close();
}
//This method is used to create/insert new game.
//#param name
// #param genre
// #return long
public long createGame(String name, String genre) {
ContentValues initialValues = new ContentValues();
initialValues.put(KEY_NAME, name);
initialValues.put(KEY_GENRE, genre);
return mDb.insert(DATABASE_TABLE, null, initialValues);
}
// This method will delete game.
// #param rowId
// #return boolean
public static boolean deleteGame(long rowId) {
return mDb.delete(DATABASE_TABLE, KEY_ROWID + "=" + rowId, null) > 0;
}
// This method will return Cursor holding all the games.
// #return Cursor
public Cursor fetchAllGames() {
return mDb.query(DATABASE_TABLE, new String[] {KEY_ROWID, KEY_NAME,
KEY_GENRE}, null, null, null, null, null);
}
// This method will return Cursor holding the specific game.
// #param id
// #return Cursor
// #throws SQLException
public Cursor fetchGame(long id) throws SQLException {
Cursor mCursor =
mDb.query(true, DATABASE_TABLE, new String[] {KEY_ROWID,
KEY_NAME, KEY_GENRE}, KEY_ROWID + "=" + id, null,
null, null, null, null);
if (mCursor != null) {
mCursor.moveToFirst();
}
return mCursor;
}
public int getAllEntries()
{
Cursor cursor = mDb.rawQuery(
"SELECT COUNT(name) FROM game_list", null);
if(cursor.moveToFirst()) {
return cursor.getInt(0);
}
return cursor.getInt(0);
}
public String getRandomEntry()
{
//id = getAllEntries();
Random random = new Random();
int rand = random.nextInt(getAllEntries());
if(rand == 0)
++rand;
Cursor cursor = mDb.rawQuery(
"SELECT name FROM game_list WHERE _id = " + rand, null);
if(cursor.moveToFirst()) {
return cursor.getString(0);
}
return cursor.getString(0);
}
// This method will update game.
// #param id
// #param name
// #param standard
// #return boolean
public boolean updateGame(int id, String name, String standard) {
ContentValues args = new ContentValues();
args.put(KEY_NAME, name);
args.put(KEY_GENRE, standard);
return mDb.update(DATABASE_TABLE, args, KEY_ROWID + "=" + id, null) > 0;
}
}
and here is the error log
07-31 14:50:45.215: D/AndroidRuntime(280): Shutting down VM
07-31 14:50:45.215: W/dalvikvm(280): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
07-31 14:50:45.236: E/AndroidRuntime(280): FATAL EXCEPTION: main
07-31 14:50:45.236: E/AndroidRuntime(280): java.lang.IllegalStateException: Could not execute method of the activity
07-31 14:50:45.236: E/AndroidRuntime(280): at android.view.View$1.onClick(View.java:2072)
07-31 14:50:45.236: E/AndroidRuntime(280): at android.view.View.performClick(View.java:2408)
07-31 14:50:45.236: E/AndroidRuntime(280): at android.view.View$PerformClick.run(View.java:8816)
07-31 14:50:45.236: E/AndroidRuntime(280): at android.os.Handler.handleCallback(Handler.java:587)
07-31 14:50:45.236: E/AndroidRuntime(280): at android.os.Handler.dispatchMessage(Handler.java:92)
07-31 14:50:45.236: E/AndroidRuntime(280): at android.os.Looper.loop(Looper.java:123)
07-31 14:50:45.236: E/AndroidRuntime(280): at android.app.ActivityThread.main(ActivityThread.java:4627)
07-31 14:50:45.236: E/AndroidRuntime(280): at java.lang.reflect.Method.invokeNative(Native Method)
07-31 14:50:45.236: E/AndroidRuntime(280): at java.lang.reflect.Method.invoke(Method.java:521)
07-31 14:50:45.236: E/AndroidRuntime(280): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
07-31 14:50:45.236: E/AndroidRuntime(280): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
07-31 14:50:45.236: E/AndroidRuntime(280): at dalvik.system.NativeStart.main(Native Method)
07-31 14:50:45.236: E/AndroidRuntime(280): Caused by: java.lang.reflect.InvocationTargetException
07-31 14:50:45.236: E/AndroidRuntime(280): at com.example.randomgamechooser.MainScreen.chooseGame(MainScreen.java:23)
07-31 14:50:45.236: E/AndroidRuntime(280): at java.lang.reflect.Method.invokeNative(Native Method)
07-31 14:50:45.236: E/AndroidRuntime(280): at java.lang.reflect.Method.invoke(Method.java:521)
07-31 14:50:45.236: E/AndroidRuntime(280): at android.view.View$1.onClick(View.java:2067)
07-31 14:50:45.236: E/AndroidRuntime(280): ... 11 more
07-31 14:50:45.236: E/AndroidRuntime(280): Caused by: android.database.CursorIndexOutOfBoundsException: Index 0 requested, with a size of 0
07-31 14:50:45.236: E/AndroidRuntime(280): at android.database.AbstractCursor.checkPosition(AbstractCursor.java:580)
07-31 14:50:45.236: E/AndroidRuntime(280): at android.database.AbstractWindowedCursor.checkPosition(AbstractWindowedCursor.java:214)
07-31 14:50:45.236: E/AndroidRuntime(280): at android.database.AbstractWindowedCursor.getString(AbstractWindowedCursor.java:41)
07-31 14:50:45.236: E/AndroidRuntime(280): at com.example.randomgamechooser.GameList.getRandomEntry(GameList.java:153)
07-31 14:50:45.236: E/AndroidRuntime(280): ... 15 more

Read the stacktrace carefuly. Answer is at the last "Caused by" exception;
07-31 14:50:45.236: E/AndroidRuntime(280): Caused by: android.database.CursorIndexOutOfBoundsException: Index 0 requested, with a size of 0
07-31 14:50:45.236: E/AndroidRuntime(280): at android.database.AbstractCursor.checkPosition(AbstractCursor.java:580)
07-31 14:50:45.236: E/AndroidRuntime(280): at android.database.AbstractWindowedCursor.checkPosition(AbstractWindowedCursor.java:214)
07-31 14:50:45.236: E/AndroidRuntime(280): at android.database.AbstractWindowedCursor.getString(AbstractWindowedCursor.java:41)
07-31 14:50:45.236: E/AndroidRuntime(280): at com.example.randomgamechooser.GameList.getRandomEntry(GameList.java:153)
07-31 14:50:45.236: E/AndroidRuntime(280): ... 15 more
Query in method getRandomEntry() returns empty result, while you read from the first position.

SQLite Cursor crashes

i have a problem with my SQLite class. In fact, i was learning how to setting up (update and read) a database on android and I successfully wrote on the database, but when i try to read the informations and display them on the screen, my application just crashes.
I searched the problem and found that the cause of the crash is the Cursor. I commented the cursor's method, so if someone can help me with that, i would be thankful.
This my Database class.
package com.example.sqlprogramming;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
public class DatabaseClass {
public static final String KEY_ROWID = "_id";
public static final String KEY_NAME = "person_name";
public static final String KEY_RATE = "person_rate";
private static final String DATABASE_NAME = "HotOrNotdb";
private static final String DATABASE_TABLE = "peopleTable";
private static final int DATABASE_VERSION = 2;
private Dhelper ourHelperdb;
private final Context ourContext;
private SQLiteDatabase ourDatabase;
private static class Dhelper extends SQLiteOpenHelper{
public Dhelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
// TODO Auto-generated constructor stub
}
#Override
public void onCreate(SQLiteDatabase db) {
// TODO Auto-generated method stub
db.execSQL("create table if not exists " + DATABASE_TABLE + " (" +
KEY_ROWID + " INTEGER PRIMARY KEY AUTOINCREMENT, " +
KEY_NAME + "VARCHAR NOT NULL, " +
KEY_RATE + "VARCHAR NOT NULL);");
}
#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 DatabaseClass(Context c){
ourContext = c;
}
public DatabaseClass open() throws SQLException{
ourHelperdb = new Dhelper(ourContext);
ourDatabase = ourHelperdb.getWritableDatabase();
return this;
}
public void close(){
ourHelperdb.close();
}
public long addEntry(String personName, String personHotness) {
// TODO Auto-generated method stub
ContentValues cv = new ContentValues();
cv.put(KEY_NAME, personName);
cv.put(KEY_RATE, personHotness);
return ourDatabase.insert(DATABASE_TABLE, null, cv);
}
//HERE IS MY PROBLEM WITH THE CURSOR
public String getData() {
// TODO Auto-generated method stub
String[] columns = new String[]{KEY_ROWID, KEY_NAME, KEY_RATE};
String result = "hello";
Cursor c = ourDatabase.query(true, DATABASE_TABLE, columns, null, null, null, null, null, null);
int iRowId = c.getColumnIndex(KEY_ROWID);
int iName = c.getColumnIndex(KEY_NAME);
int iRate = c.getColumnIndex(KEY_RATE);
for (c.moveToFirst(); !c.isAfterLast(); c.moveToNext()){
result = result + c.getString(iRowId) + " " + c.getString(iName) +" " + c.getString(iRate) + "\n";
}
c.close();
return result;
}
}
And this Class call the Database Class and should take informations from database to display it on the screen.
package com.example.sqlprogramming;
import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;
public class SQLview extends Activity{
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.layout_sqlview);
TextView textInfo = (TextView) findViewById (R.id.tvSQLinfo);
DatabaseClass info = new DatabaseClass(this);
info.open();
String _data = info.getData();
info.close();
textInfo.setText(_data);
}
}
Thank you again.
I'll post stacktrace and logcat soon.
Here is my Logcat/Stacktrace
02-24 20:08:12.378: E/Curosr!(1221): I got an error here :
02-24 20:08:12.378: E/Curosr!(1221): android.database.sqlite.SQLiteException: no such column: person_name (code 1): , while compiling: SELECT _id AS _id, person_name, person_rate FROM peopleTable
02-24 20:08:12.378: E/Curosr!(1221): at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
02-24 20:08:12.378: E/Curosr!(1221): at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:882)
02-24 20:08:12.378: E/Curosr!(1221): at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:493)
02-24 20:08:12.378: E/Curosr!(1221): at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
02-24 20:08:12.378: E/Curosr!(1221): at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58)
02-24 20:08:12.378: E/Curosr!(1221): at android.database.sqlite.SQLiteQuery.<init>(SQLiteQuery.java:37)
02-24 20:08:12.378: E/Curosr!(1221): at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:44)
02-24 20:08:12.378: E/Curosr!(1221): at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1314)
02-24 20:08:12.378: E/Curosr!(1221): at android.database.sqlite.SQLiteDatabase.queryWithFactory(SQLiteDatabase.java:1161)
02-24 20:08:12.378: E/Curosr!(1221): at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1032)
02-24 20:08:12.378: E/Curosr!(1221): at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1200)
02-24 20:08:12.378: E/Curosr!(1221): at com.example.sqlprogramming.DatabaseClass.getData(DatabaseClass.java:75)
02-24 20:08:12.378: E/Curosr!(1221): at com.example.sqlprogramming.SQLview.onCreate(SQLview.java:14)
02-24 20:08:12.378: E/Curosr!(1221): at android.app.Activity.performCreate(Activity.java:5104)
02-24 20:08:12.378: E/Curosr!(1221): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
02-24 20:08:12.378: E/Curosr!(1221): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
02-24 20:08:12.378: E/Curosr!(1221): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
02-24 20:08:12.378: E/Curosr!(1221): at android.app.ActivityThread.access$600(ActivityThread.java:141)
02-24 20:08:12.378: E/Curosr!(1221): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
02-24 20:08:12.378: E/Curosr!(1221): at android.os.Handler.dispatchMessage(Handler.java:99)
02-24 20:08:12.378: E/Curosr!(1221): at android.os.Looper.loop(Looper.java:137)
02-24 20:08:12.378: E/Curosr!(1221): at android.app.ActivityThread.main(ActivityThread.java:5039)
02-24 20:08:12.378: E/Curosr!(1221): at java.lang.reflect.Method.invokeNative(Native Method)
02-24 20:08:12.378: E/Curosr!(1221): at java.lang.reflect.Method.invoke(Method.java:511)
02-24 20:08:12.378: E/Curosr!(1221): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
02-24 20:08:12.378: E/Curosr!(1221): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
02-24 20:08:12.378: E/Curosr!(1221): at dalvik.system.NativeStart.main(Native Method)

Your create statement is missing a few spaces. Try using:
db.execSQL("create table if not exists " + DATABASE_TABLE + " (" +
KEY_ROWID + " INTEGER PRIMARY KEY AUTOINCREMENT, " +
KEY_NAME + " VARCHAR NOT NULL, " +
KEY_RATE + " VARCHAR NOT NULL);");
According to your current statement, your last two column names become person_nameVARCHAR and person_rateVARCHAR

If you're reading, you need to use:
ourDatabase = ourHelperdb.getReadableDatabase();
When you open your DB, you are setting it to write.
(That's my first guess, post stack trace).
Here's a working example from some of my code on how to read a cursor:
mDb = mDbHelper.getReadableDatabase();
Cursor c = mDb.query("Timesheets", new String[] {
KEY_TIMESHEETS_ROWID + " AS _id", KEY_TIMESHEETS_DESCRIPTION,
KEY_TIMESHEETS_TITLE, KEY_TIMESHEETS_DATE_START,
KEY_TIMESHEETS_DATE_END, KEY_TIMESHEETS_INVOICED,
KEY_TIMESHEETS_PROJECTID }, "timesheet_id = ?",
new String[] { String.valueOf(timesheetId) }, null, null, null);
c.moveToFirst();
SimpleDateFormat dateFormat = new SimpleDateFormat(
"yyyy-MM-dd HH:mm:ss");
Timesheet timesheet = new Timesheet();
while (c.isAfterLast() == false) {
timesheet.setTimesheetId(c.getInt(0));
// ...
c.moveToNext();
}
c.close();