Hi,
Sorry for reposting this, but some of the initial details were incorrect. I
have followed the instructions from this site to the letter
http://www.reigndesign.com/blog/using-your-own-sqlite-database-in-android-applications/comment-page-2/
but to no avail. Each time I run the code suggested, the Eclipse debugger
keep throwing the following error
no such table: TABLE: , while compiling: SELECT _id, network, url FROM
TABLE.
I created the database using SQLite Browser and ran the emulator's shell and
can see that the database was there.
Here is the code that I am implementing to manage the database:
package com.rodney.IET_Events_Widget;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.
SQLiteDatabase;
import android.database.sqlite.SQLiteException;
import android.database.sqlite.SQLiteOpenHelper;
public class DataBaseHelper extends SQLiteOpenHelper {
//The Android's default system path of your application database.
private static String DB_PATH =
"/data/data/com.rodney.IET_Events_Widget/databases/";
private static final String DB_NAME = "local_network_db";
private static final String DB_TABLE = "local_network";
public static final String KEY_NETWORK = "network";
public static final String KEY_URL = "url";
public static final String KEY_ROWID = "_id";
private SQLiteDatabase myDataBase;
private final Context myContext;
/**
* Constructor
* Takes and keeps a reference of the passed context in order to access
to the application assets and resources.
* @param context
*/
public DataBaseHelper(Context context) {
super(context, DB_NAME, null, 1);
this.myContext = context;
}
/**
* Creates a empty database on the system and rewrites it with your own
database.
* */
public void createDataBase() throws SQLException{
boolean dbExist = checkDataBase();
if(dbExist){
//do nothing - database already exist
}else{
//By calling this method and empty database will be created into
the default system path
//of your application so we are gonna be able to overwrite that
database with our database.
this.getReadableDatabase();
try {
copyDataBase();
} catch (IOException e) {
throw new Error("Error copying database");
}
}
}
/**
* Check if the database already exist to avoid re-copying the file each
time you open the application.
* @return true if it exists, false if it doesn't
*/
private boolean checkDataBase(){
SQLiteDatabase checkDB = null;
try{
String myPath = DB_PATH + DB_NAME;
checkDB = SQLiteDatabase.openDatabase(myPath, null,
SQLiteDatabase.OPEN_READONLY);
}catch(SQLiteException e){
//database does't exist yet.
}
if(checkDB != null){
checkDB.close();
}
return checkDB != null ? true : false;
}
/**
* Copies your database from your local assets-folder to the just
created empty database in the
* system folder, from where it can be accessed and handled.
* This is done by transferring bytestream.
* */
private void copyDataBase() throws IOException{
//Open your local db as the input stream
InputStream myInput = myContext.getAssets().open(DB_NAME);
// Path to the just created empty db
String outFileName = DB_PATH + DB_NAME;
//Open the empty db as the output stream
OutputStream myOutput = new FileOutputStream(outFileName);
//transfer bytes from the inputfile to the outputfile
byte[] buffer = new byte[1024];
int length;
while ((length = myInput.read(buffer))>0){
myOutput.write(buffer, 0, length);
}
//Close the streams
myOutput.flush();
myOutput.close();
myInput.close();
}
public void openDataBase() throws SQLException{
//Open the database
String myPath = DB_PATH + DB_NAME;
myDataBase = SQLiteDatabase.openDatabase(myPath, null,
SQLiteDatabase.OPEN_READONLY);
}
@Override
public synchronized void close() {
if(myDataBase != null)
myDataBase.close();
super.close();
}
@Override
public void onCreate(SQLiteDatabase db) {
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion)
{
}
/**
* Return a Cursor over the list of all notes in the database
*
* @return Cursor over all notes
*/
public Cursor fetchAll() {
return myDataBase.query(DB_TABLE, new String[] {KEY_ROWID,
KEY_NETWORK,KEY_URL}, null, null, null, null, null);
}
}
And here is the code for the implementation in my ListView Activity:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.cfg_activity);
mDbHelper = new DataBaseHelper(this);
mDbHelper.openDataBase();
fillData();
saveButton();
cancelButton();
Intent intent = getIntent();
Bundle extras = intent.getExtras();
if (extras != null) {
mAppWidgetId = extras.getInt(
AppWidgetManager.EXTRA_APPWIDGET_ID,
AppWidgetManager.INVALID_APPWIDGET_ID);
}
}
.........
...........
.................
private void fillData() {
// Get all of the rows from the database and create the item
list
mNetworkCursor = mDbHelper.fetchAll();
startManagingCursor(mNetworkCursor);
// Create an array to specify the fields we want to display in
the list (only TITLE)
String[] from = new String[]{DataBaseHelper.KEY_NETWORK};
// and an array of the fields we want to bind those fields to
(in this case just text1)
int[] to = new int[]{R.id.text1};
// Now create a simple cursor adapter and set it to display
SimpleCursorAdapter iet_networks = new
SimpleCursorAdapter(this, R.layout.ln_rows, mNetworkCursor, from, to);
setListAdapter(networks);
}
Any clues or help will be greatly appreciated, let me know if more detail is
required.
Many thanks in advance
Rodney
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