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Fragment is trying to cast to activity

I know this answer is probably simple but i cannot figure it out. I am modifying example code for a project and keep getting a ClassCastException when i try to launch the app. Says that ListActivityFragment cannot be cast to android.app.Activity. What im not understanding(which is probably the simple part) is why its trying to cast it onto an activity when my main is a fragmentactivity. I know the code is rough, still trying to finish it up but cant get past this.
FragmentActivity
public class MainActivity extends FragmentActivity {
private boolean isLargeScreen = true;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (findViewById(R.id.normal_screen_layout) != null) {
isLargeScreen = false;
ListActivityFragment listActivityFragment = new ListActivityFragment();
listActivityFragment.setArguments(getIntent().getExtras());
getSupportFragmentManager().beginTransaction()
.add(R.id.normal_screen_layout, listActivityFragment)
.commit();
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.addItem:
ListActivityFragment newFragment = new ListActivityFragment();
FragmentTransaction transaction = getSupportFragmentManager()
.beginTransaction();
transaction.replace(R.id.normal_screen_layout, newFragment);
transaction.addToBackStack(null);
transaction.commit();
break;
default:
return super.onOptionsItemSelected(item);
}
return true;
}
}
}
ListActivity
public class ListActivityFragment extends ListFragment implements
OnClickListener {
private ArrayList<String> items = new ArrayList<String>();
private ListView listView;
private View outerView;
private Button deleteButton;
private ListActivityListener listener;
public interface ListActivityListener {
public void meetingAdded();
}
public ListActivityFragment() {
}
public void onAttach(Activity activity) {
super.onAttach(activity);
try {
listener = (ListActivityListener) activity;
} catch (ClassCastException e) {
throw new ClassCastException(activity.toString()
+ " must implement OnHeadlineSelectedListener");
}
}
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
outerView = inflater.inflate(R.layout.list_of_meetings, container,
false);
listView = (ListView) outerView.findViewById(R.id.listView1);
deleteButton = (Button) outerView.findViewById(R.id.deleteButton);
createList();
return outerView;
}
public void createList() {
items.clear();
Iterator<Items> iterator = ItemCollection.Instance().iterator();
while (iterator.hasNext()) {
items.add(iterator.next().toString());
}
listView.setAdapter(new ArrayAdapter<String>(getActivity(),
android.R.layout.simple_list_item_1, items));
}
#Override
public void onClick(DialogInterface arg0, int arg1) {
ListView listView = getListView();
for (int index = 0; index < listView.getChildCount(); index++) {
View viewGroup = listView.getChildAt(index);
CheckBox checkBox = (CheckBox) viewGroup
.findViewById(R.id.itemSelectCheckBox);
if (checkBox.isChecked()) {
TextView textView = (TextView) viewGroup
.findViewById(R.id.productTextView);
int key = (Integer) textView.getTag();
ItemCollection.Instance().delete(key);
}
}
createList();
}
#Override
public void onStart() {
super.onStart();
}
public void onListItemClick(ListView l, View v, int position, long id) {
getListView().setItemChecked(position, true);
}
}
And heres the Logcat
07-15 01:59:50.710: E/AndroidRuntime(878): FATAL EXCEPTION: main
07-15 01:59:50.710: E/AndroidRuntime(878): Process: com.example.assignment5, PID: 878
07-15 01:59:50.710: E/AndroidRuntime(878): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.assignment5/com.example.assignment5.ListActivityFragment}: java.lang.ClassCastException: com.example.assignment5.ListActivityFragment cannot be cast to android.app.Activity
07-15 01:59:50.710: E/AndroidRuntime(878): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2121)
07-15 01:59:50.710: E/AndroidRuntime(878): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
07-15 01:59:50.710: E/AndroidRuntime(878): at android.app.ActivityThread.access$800(ActivityThread.java:135)
07-15 01:59:50.710: E/AndroidRuntime(878): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
07-15 01:59:50.710: E/AndroidRuntime(878): at android.os.Handler.dispatchMessage(Handler.java:102)
07-15 01:59:50.710: E/AndroidRuntime(878): at android.os.Looper.loop(Looper.java:136)
07-15 01:59:50.710: E/AndroidRuntime(878): at android.app.ActivityThread.main(ActivityThread.java:5017)
07-15 01:59:50.710: E/AndroidRuntime(878): at java.lang.reflect.Method.invokeNative(Native Method)
07-15 01:59:50.710: E/AndroidRuntime(878): at java.lang.reflect.Method.invoke(Method.java:515)
07-15 01:59:50.710: E/AndroidRuntime(878): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
07-15 01:59:50.710: E/AndroidRuntime(878): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
07-15 01:59:50.710: E/AndroidRuntime(878): at dalvik.system.NativeStart.main(Native Method)
07-15 01:59:50.710: E/AndroidRuntime(878): Caused by: java.lang.ClassCastException: com.example.assignment5.ListActivityFragment cannot be cast to android.app.Activity
07-15 01:59:50.710: E/AndroidRuntime(878): at android.app.Instrumentation.newActivity(Instrumentation.java:1061)
07-15 01:59:50.710: E/AndroidRuntime(878): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2112)
07-15 01:59:50.710: E/AndroidRuntime(878): ... 11 more
07-15 01:59:51.160: E/NetdConnector(383): NDC Command {65 bandwidth setiquota eth0 9223372036854775807} took too long (1117ms)

Caused by: java.lang.ClassCastException:
com.example.assignment5.ListActivityFragment cannot be cast to
android.app.Activity 07-15 01:59:50.710: E/AndroidRuntime(878):
As the error says -
ListActivityFragment is not an activity. So you are trying to access it just like an activity.
Make sure you haven't declared ListActivityFragment in the manifest. In your manifest if you made an entry for the fragment then that's wrong.
Also make sure that you haven't used startActivity for the fragment. Because this is done for activity class and not for fragment class.

Retrieve SQLite data in edit text from Spinner selected item in Android

I have spinner in Activity and edittext's. When i run the app I'm getting warning of nullPointerException.I dosen't retrieve the SQLite data in edit text in onCreate().Can someone help me.
Here is my code.
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.delete_entry);
databaseHelper = new DatabaseHelper(this);
databaseHelper.onOpen(db);
spinner_searchByEmpName = (Spinner)findViewById(R.id.searchByEmpName);
loadSerachBYProject() ;
spinner_searchByEmpName.setOnItemSelectedListener(new OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
// TODO Auto-generated method stub
selectedEmployeeName = spinner_searchByEmpName.getSelectedItem().toString().trim();
System.out.println("selectedProjectName " + selectedEmployeeName);
}
#Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
});
etEmpName=(EditText)findViewById(R.id.Delete_editText_StaffEmployee_Name);
etDepartment=(EditText)findViewById(R.id.Delete_editText_Department);
etDesignation=(EditText)findViewById(R.id.Delete_editText_Designation);
try {
Cursor cursor = db.rawQuery("SELECT staff_employee_id, staff_emp_name, department, designation FROM employee_details WHERE staff_emp_name = ?",
new String[] { "" + selectedEmployeeName });
etEmpName.setText(cursor.getString(cursor
.getColumnIndex("staff_emp_name")));
etDepartment.setText(cursor.getString(cursor
.getColumnIndex("department")));
etDesignation.setText(cursor.getString(cursor
.getColumnIndex("designation")));
}
catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
}
private void loadSerachBYProject()
{
DatabaseHelper databaseHelper = new DatabaseHelper(getApplicationContext());
// Spinner Drop down elements
List<String> projectsName = databaseHelper.getAllEmployeeName();
// Creating adapter for spinner
ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item, projectsName);
// Drop down layout style - list view with radio button
dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
// attaching data adapter to spinner
spinner_searchByEmpName.setAdapter(dataAdapter);
}
}
Thanks in Advance.
Here is My Log cat error info
06-26 18:08:09.073: W/System.err(601): java.lang.NullPointerException
06-26 18:08:09.083: W/System.err(601): at com.employee_review.Update_Entry.onCreate(Update_Entry.java:68)
06-26 18:08:09.083: W/System.err(601): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
06-26 18:08:09.083: W/System.err(601): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
06-26 18:08:09.083: W/System.err(601): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
06-26 18:08:09.092: W/System.err(601): at android.app.ActivityThread.access$1500(ActivityThread.java:117)
06-26 18:08:09.092: W/System.err(601): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
06-26 18:08:09.103: W/System.err(601): at android.os.Handler.dispatchMessage(Handler.java:99)
06-26 18:08:09.103: W/System.err(601): at android.os.Looper.loop(Looper.java:123)
06-26 18:08:09.113: W/System.err(601): at android.app.ActivityThread.main(ActivityThread.java:3683)
06-26 18:08:09.123: W/System.err(601): at java.lang.reflect.Method.invokeNative(Native Method)
06-26 18:08:09.133: W/System.err(601): at java.lang.reflect.Method.invoke(Method.java:507)
06-26 18:08:09.133: W/System.err(601): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
06-26 18:08:09.133: W/System.err(601): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
06-26 18:08:09.133: W/System.err(601): at dalvik.system.NativeStart.main(Native Method)

Try this , i guess
if(cursor!=null){
etEmpName.setText(cursor.getString(cursor
.getColumnIndex("staff_emp_name")));
etDepartment.setText(cursor.getString(cursor
.getColumnIndex("department")));
etDesignation.setText(cursor.getString(cursor
.getColumnIndex("designation")));
}

db is never initialized. It must be initialized in onCreate(), as that's the first method that is run in an Activity. I see this:
databaseHelper = new DatabaseHelper(this);
databaseHelper.onOpen(db);
I'm guessing you really should have this:
databaseHelper = new DatabaseHelper(this);
db=databaseHelper.getReadableDatabase();

Fatal Exception when viewing/ writing database SQLite?

I get an error when I run my emulator, and try to start reading or viewing the database..
Please see my logcat at the bottum of this page!
I have a Database activity, a SQLView activity, and an SQLite activity.
The database activity is to run the database, the SQLView activity to view the database, and the last one, my SQLite activity is to wrie to my database.
I use SQLiteAssetHelper, and my .rar file is in my assets/databases/Voedsel.rar .
This are my activities:
My database activity:
package com.jacob.eindproject;
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.database.sqlite.SQLiteDatabase.CursorFactory;
import java.sql.*;
import com.readystatesoftware.sqliteasset.SQLiteAssetHelper;
public class Database extends SQLiteAssetHelper {
public static final String KEY_PRODUCT = "Product";
public static final String KEY_EENHEID = "Eenheid";
public static final String KEY_KCAL = "Kcal";
private static final String DATABASE_NAME = "Voedsel";
private static final String DATABASE_TABLE = "Voeding";
private static final int DATABASE_VERSION = 1;
private DbHelper ourHelper;
private Context Context;
private SQLiteDatabase ourDatabase;
private static class DbHelper extends SQLiteAssetHelper{
public DbHelper(Context context) {
super(context, DATABASE_NAME, context.getExternalFilesDir(null).getAbsolutePath(), null, DATABASE_VERSION);
// TODO Auto-generated constructor stub
}
}
#Override
public void onUpgrade(SQLiteDatabase Voedsel, int oldVersion, int newVersion) {
Voedsel.execSQL("DROP TABLE IF EXISTS " + DATABASE_TABLE);
onCreate(Voedsel);
}
public Database(Context context){
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
public Database open() throws SQLException{
ourHelper = new DbHelper(Context);
ourDatabase = ourHelper.getWritableDatabase();
return this;
}
public void close() {
ourHelper.close();
}
public long createEntry(String product, String kcal, String eenheid) {
ContentValues cv = new ContentValues();
cv.put(KEY_PRODUCT, product);
cv.put(KEY_EENHEID, eenheid);
cv.put(KEY_KCAL, kcal);
return ourDatabase.insert(DATABASE_TABLE, null, cv);
}
public String getData() {
// TODO Auto-generated method stub
String[] columns = new String[]{ KEY_PRODUCT, KEY_EENHEID, KEY_KCAL};
Cursor c = ourDatabase.query(DATABASE_TABLE, columns, null, null, null, null, null);
String result = "";
int iProduct = c.getColumnIndex(KEY_PRODUCT);
int iEenheid = c.getColumnIndex(KEY_EENHEID);
int iKcal = c.getColumnIndex(KEY_KCAL);
for (c.moveToFirst(); !c.isAfterLast(); c.moveToNext()){
result = result + c.getString(iProduct) + " " + c.getString(iEenheid) + " " + c.getString(iKcal) + "\n";
}
return result;
}
public void close(Database database) {
// TODO Auto-generated method stub
}
}
My SQLite activity:
public class SQLite extends Activity implements View.OnClickListener {
Button sqlUpdate, sqlView;
EditText sqlVoeding, sqlKcal, sqlEenheid;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.sqllite);
sqlUpdate = (Button) findViewById(R.id.bSQLUpdate);
sqlVoeding = (EditText) findViewById(R.id.etSQLVoeding);
sqlEenheid = (EditText) findViewById(R.id.etSQLEenheid);
sqlKcal = (EditText) findViewById(R.id.etSQLKcal);
sqlView = (Button) findViewById(R.id.bSQLopenView);
sqlView.setOnClickListener((android.view.View.OnClickListener) this);
sqlUpdate.setOnClickListener((android.view.View.OnClickListener) this);
}
public void onClick(View arg0) {
switch (arg0.getId()) {
case R.id.bSQLUpdate:
boolean didItWork = true;
try{
String voeding = sqlVoeding.getText().toString();
String Kcal = sqlKcal.getText().toString();
String eenheid = sqlEenheid.getText().toString();
Database entry = new Database(SQLite.this);
entry.open();
entry.createEntry(voeding, Kcal, eenheid);
entry.close();
}catch (Exception e ){
didItWork = false;
}finally{
if (didItWork){
Dialog d = new Dialog(this);
d.setTitle("Heak Yeay");
TextView tv = new TextView(this);
tv.setText("Succes");
d.setContentView(tv);
d.show();
}
}
break;
case R.id.bSQLopenView:
Intent i = new Intent(this, SQLView.class);
startActivity(i);
}
}
public void onClick(DialogInterface arg0, int arg1) {
// TODO Auto-generated method stub
}
}
And the SQLView activity:
public class SQLView extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.sqlview);
TextView tv = (TextView) findViewById(R.id.tvSQLinfo);
Database info = new Database(this);
info.open();
String data = info.getData();
info.close();
tv.setText(data);
}
}
This is my logcat error when I click the SQLView activity:
12-16 14:28:26.883: E/AndroidRuntime(1170): FATAL EXCEPTION: main
12-16 14:28:26.883: E/AndroidRuntime(1170): java.lang.NoClassDefFoundError: com.jacob.eindproject.Database
12-16 14:28:26.883: E/AndroidRuntime(1170): at com.jacob.eindproject.SQLView.onCreate(SQLView.java:14)
12-16 14:28:26.883: E/AndroidRuntime(1170): at android.app.Activity.performCreate(Activity.java:5133)
12-16 14:28:26.883: E/AndroidRuntime(1170): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
12-16 14:28:26.883: E/AndroidRuntime(1170): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
12-16 14:28:26.883: E/AndroidRuntime(1170): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
12-16 14:28:26.883: E/AndroidRuntime(1170): at android.app.ActivityThread.access$600(ActivityThread.java:141)
12-16 14:28:26.883: E/AndroidRuntime(1170): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
12-16 14:28:26.883: E/AndroidRuntime(1170): at android.os.Handler.dispatchMessage(Handler.java:99)
12-16 14:28:26.883: E/AndroidRuntime(1170): at android.os.Looper.loop(Looper.java:137)
12-16 14:28:26.883: E/AndroidRuntime(1170): at android.app.ActivityThread.main(ActivityThread.java:5103)
12-16 14:28:26.883: E/AndroidRuntime(1170): at java.lang.reflect.Method.invokeNative(Native Method)
12-16 14:28:26.883: E/AndroidRuntime(1170): at java.lang.reflect.Method.invoke(Method.java:525)
12-16 14:28:26.883: E/AndroidRuntime(1170): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
12-16 14:28:26.883: E/AndroidRuntime(1170): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
12-16 14:28:26.883: E/AndroidRuntime(1170): at dalvik.system.NativeStart.main(Native Method)
And this is my error when I click my 'write' activity:
12-16 14:27:35.913: E/AndroidRuntime(999): FATAL EXCEPTION: main
12-16 14:27:35.913: E/AndroidRuntime(999): java.lang.NoClassDefFoundError: com.jacob.eindproject.Database
12-16 14:27:35.913: E/AndroidRuntime(999): at com.jacob.eindproject.SQLite.onClick(SQLite.java:45)
12-16 14:27:35.913: E/AndroidRuntime(999): at android.view.View.performClick(View.java:4240)
12-16 14:27:35.913: E/AndroidRuntime(999): at android.view.View$PerformClick.run(View.java:17721)
12-16 14:27:35.913: E/AndroidRuntime(999): at android.os.Handler.handleCallback(Handler.java:730)
12-16 14:27:35.913: E/AndroidRuntime(999): at android.os.Handler.dispatchMessage(Handler.java:92)
12-16 14:27:35.913: E/AndroidRuntime(999): at android.os.Looper.loop(Looper.java:137)
12-16 14:27:35.913: E/AndroidRuntime(999): at android.app.ActivityThread.main(ActivityThread.java:5103)
12-16 14:27:35.913: E/AndroidRuntime(999): at java.lang.reflect.Method.invokeNative(Native Method)
12-16 14:27:35.913: E/AndroidRuntime(999): at java.lang.reflect.Method.invoke(Method.java:525)
12-16 14:27:35.913: E/AndroidRuntime(999): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
12-16 14:27:35.913: E/AndroidRuntime(999): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
12-16 14:27:35.913: E/AndroidRuntime(999): at dalvik.system.NativeStart.main(Native Method)
Hopefully someone can help me fix my error. Thank you all in advance for taking your time.
Jacob.

I don't think you've added the SQLiteAssetHelper library to your project correctly.
You must ensure that the build path for your project is correct, and all referenced libraries are selected.
Right click on your project and select 'Properties'
Click on 'Android'
Make sure your SQLiteAssetHelper library is selected

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.

App Crashes When Reading Contacts

I've got a crash while trying to read the contacts of the user, I thought because it's because of the Emulator, but I want to triple check, as I don't have an android based phone. The Logcat gives an error that, it can't read the row "id" did I incorrectly name that string?
Lastly, how would I implement a dialogue box, to see if the user wants the app to read the contacts?
Thanks so much:)
Code:
private void checkandImportContacts() {
// TODO Auto-generated method stub
SharedPreferences sp = getSharedPreferences(PREFS_CHECK, 0);
String checkfirstime = sp.getString("key3", null);
if(checkfirstime !=null && equals("sdhdasudafdsugdiasgdas38ey98d1diass")) {
finish();
} else {
Cursor cursor = getContacts();
while (cursor.moveToNext()) {
String displayName = cursor.getString(cursor.getColumnIndex(ContactsContract.Data.DISPLAY_NAME));
Toast.makeText(getApplicationContext(), displayName, Toast.LENGTH_LONG).show();
}
}
}
private Cursor getContacts() {
Uri uri = ContactsContract.Contacts.CONTENT_URI;
String[] projection = new String[] { ContactsContract.Contacts._ID, ContactsContract.Contacts.DISPLAY_NAME };
String selection = ContactsContract.Contacts.IN_VISIBLE_GROUP + " = ‘" + ("1") + "’";
String[] selectionArgs = null;
String sortOrder = ContactsContract.Contacts.DISPLAY_NAME+ " COLLATE LOCALIZED ASC";
return managedQuery(uri, projection, selection, selectionArgs, sortOrder);
}
LogCat:
04-23 16:49:48.288: E/AndroidRuntime(437): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.gta5news.bananaphone/com.gta5news.bananaphone.ChatService}: android.database.sqlite.SQLiteException: no such column: ‘1’: , while compiling: SELECT _id, display_name FROM view_contacts_restricted WHERE (in_visible_group = ‘1’) ORDER BY display_name COLLATE LOCALIZED ASC
04-23 16:49:48.288: E/AndroidRuntime(437): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
04-23 16:49:48.288: E/AndroidRuntime(437): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
04-23 16:49:48.288: E/AndroidRuntime(437): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
04-23 16:49:48.288: E/AndroidRuntime(437): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
04-23 16:49:48.288: E/AndroidRuntime(437): at android.os.Handler.dispatchMessage(Handler.java:99)
04-23 16:49:48.288: E/AndroidRuntime(437): at android.os.Looper.loop(Looper.java:123)
04-23 16:49:48.288: E/AndroidRuntime(437): at android.app.ActivityThread.main(ActivityThread.java:4627)
04-23 16:49:48.288: E/AndroidRuntime(437): at java.lang.reflect.Method.invokeNative(Native Method)
04-23 16:49:48.288: E/AndroidRuntime(437): at java.lang.reflect.Method.invoke(Method.java:521)
04-23 16:49:48.288: E/AndroidRuntime(437): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
04-23 16:49:48.288: E/AndroidRuntime(437): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
04-23 16:49:48.288: E/AndroidRuntime(437): at dalvik.system.NativeStart.main(Native Method)
04-23 16:49:48.288: E/AndroidRuntime(437): Caused by: android.database.sqlite.SQLiteException: no such column: ‘1’: , while compiling: SELECT _id, display_name FROM view_contacts_restricted WHERE (in_visible_group = ‘1’) ORDER BY display_name COLLATE LOCALIZED ASC
04-23 16:49:48.288: E/AndroidRuntime(437): at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:158)
04-23 16:49:48.288: E/AndroidRuntime(437): at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:114)
04-23 16:49:48.288: E/AndroidRuntime(437): at android.content.ContentProviderProxy.bulkQueryInternal(ContentProviderNative.java:330)
04-23 16:49:48.288: E/AndroidRuntime(437): at android.content.ContentProviderProxy.query(ContentProviderNative.java:366)
04-23 16:49:48.288: E/AndroidRuntime(437): at android.content.ContentResolver.query(ContentResolver.java:245)
04-23 16:49:48.288: E/AndroidRuntime(437): at android.app.Activity.managedQuery(Activity.java:1520)
04-23 16:49:48.288: E/AndroidRuntime(437): at com.gta5news.bananaphone.ChatService.getContacts(ChatService.java:73)
04-23 16:49:48.288: E/AndroidRuntime(437): at com.gta5news.bananaphone.ChatService.checkandImportContacts(ChatService.java:56)
04-23 16:49:48.288: E/AndroidRuntime(437): at com.gta5news.bananaphone.ChatService.onCreate(ChatService.java:46)
04-23 16:49:48.288: E/AndroidRuntime(437): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
04-23 16:49:48.288: E/AndroidRuntime(437): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)

You use the wrong chars in your query
Caused by: android.database.sqlite.SQLiteException: no such column: ‘1’
SQLite tries to interpret the ‘1’ as column name since it is no primitive value. Values in SQLite are surrounded by ', column names by " or nothing.
if that group thing is dynamic do it like this:
int group = 1;
String selection = ContactsContract.Contacts.IN_VISIBLE_GROUP + " = ?";
String[] selectionArgs = new String[] { String.valueOf(group) };
The value is automatically wrapped in ' & escaped then. If the value is static you can simply do
String selection = ContactsContract.Contacts.IN_VISIBLE_GROUP + " = 1";
String[] selectionArgs = null;

private void getDetails(){
Uri uri = ContactsContract.CommonDataKinds.Phone.CONTENT_URI;
ContentResolver cr = getContentResolver();
Cursor cur = cr.query(ContactsContract.Contacts.CONTENT_URI,null, null, null, null);
String[] projection = new String[] {ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME,
ContactsContract.CommonDataKinds.Phone.NUMBER };
Cursor names = getContentResolver().query(uri, projection, null, null, null);
int indexName = names.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME);
int indexNumber = names.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER);
names.moveToFirst();
do {
String name = names.getString(indexName);
Log.e("Name new:", name);
String number = names.getString(indexNumber);
Log.e("Number new:","::"+number);
} while (names.moveToNext());
}
The above retrun all the name and number from from your contact database..