I am very novice programmer in Android. My query is to fetch data from SQLite and then reflect all data in to list column . now when i click on button, that all data must be converted in .pdf format with good tabularised format... Millions of thank in advance..
public class Details_List extends Activity {
Button share;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.details_list);
ListView lv= (ListView)findViewById(R.id.listview);
share = (Button)findViewById(R.id.email);
share.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent i = new Intent(Details_List.this, Email.class);
startActivity(i);
}
});
// create the grid item mapping
String[] from = new String[] {"rowid", "col_1", "col_2", "col_3", "col_4", "col_5"};
int[] to = new int[] { R.id.item1, R.id.item2, R.id.item3, R.id.item4, R.id.item5, R.id.item6};
// prepare the list of all records
List<HashMap<String, String>> fillMaps = new ArrayList<HashMap<String, String>>();
for(int i = 1; i < 10; i++){
HashMap<String, String> map = new HashMap<String, String>();
map.put("rowid", "" + i);
map.put("col_1", "col_1_item_" + i);
map.put("col_2", "col_2_item_" + i);
map.put("col_3", "col_3_item_" + i);
map.put("col_3", "col_4_item_" + i);
map.put("col_3", "col_5_item_" + i);
fillMaps.add(map);
}
// fill in the grid_item layout
SimpleAdapter adapter = new SimpleAdapter(this, fillMaps, R.layout.grid_item, from, to);
lv.setAdapter(adapter);
}
}
for your first purpose to get data from SQLite DB into arraylist, here is an example below:
public class DatabaseHelper_Notification extends SQLiteOpenHelper
{
public String TAG = "DatabaseHelper:";
private static final String DATABASE_NAME = "Notifications";
private final Context cntxtDBContext;
final static int DATABASE_VERSION = 2;
final String _TableName = "Notifications";
final String _RowID = "RowID";
final String _NotificationID = "NotificationID";
final String _NotificationText = "NotificationText";
final String _NotificationRead = "NotificationRead";
/**
* the default constructor of this class
*
* @param context
* the context in which this object is to be used
*/
public DatabaseHelper_Notification(Context context)
{
super(context, DATABASE_NAME, null, DATABASE_VERSION);
this.cntxtDBContext = context;
// strDB_path = cntxtDBContext.getDatabasePath(strDB_NAME).toString();
}
@Override
public void onCreate(SQLiteDatabase db)
{
String CREATE_CONTACTS_TABLE = "CREATE TABLE " + _TableName + "(" + _RowID + " INTEGER PRIMARY KEY," + _NotificationID
+ " INTEGER NOT NULL DEFAULT (0)," + _NotificationText + " TEXT" + "," + _NotificationRead + " BOOL NOT NULL DEFAULT (0))";
db.execSQL(CREATE_CONTACTS_TABLE);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion)
{
if (newVersion > oldVersion)
{
db.execSQL("DROP TABLE IF EXISTS " + _TableName);
// Create tables again
onCreate(db);
}
}
/**
* gets all notification news from notifications database
*
* @return the list of the notification present in the database
*/
public ArrayList<NotificationCls> getAllNotifications()
{
ArrayList<NotificationCls> alNotifications = new ArrayList<NotificationCls>();
;
Cursor curData = null;
SQLiteDatabase db = null;
try
{
db = this.getReadableDatabase();
String strSelectQuery = "SELECT * FROM " + _TableName;
curData = db.rawQuery(strSelectQuery, null);
if (curData.getCount() > 0)
{
curData.moveToFirst();
do
{
NotificationCls noti = new NotificationCls();
noti.setStrNotificationText(curData.getString(curData.getColumnIndex(_NotificationText)));
noti.setiNotificationiID(curData.getInt(curData.getColumnIndex(_NotificationID)));
boolean bRead = curData.getInt(curData.getColumnIndex(_NotificationRead)) == 0 ? false : true;
noti.setbNotificationRead(bRead);
alNotifications.add(noti);
}
while (curData.moveToNext());
}
}
catch (SQLException e)
{
e.printStackTrace();
}
catch (Exception e)
{
e.printStackTrace();
}
finally
{
if (curData != null)
{
curData.close();
}
if (db != null)
{
db.close();
}
}
return alNotifications;
}
/**
* insert the notification message in the database
*
* @param Msg
* the message received in push notification
* @param id
* the id on which the notification was sent
* @return this method will return <code>true</code> if the DB transaction was successful else it will return <code>false</code>
*/
public boolean insertNotification(String Msg, int id)
{
long lid = -1;
SQLiteDatabase db = null;
try
{
db = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(_NotificationID, id);
values.put(_NotificationText, Msg);
db.insert(_TableName, null, values);
db.close();
}
catch (SQLException e)
{
lid = -1;
e.printStackTrace();
}
catch (Exception e)
{
lid = -1;
e.printStackTrace();
}
finally
{
if (db != null)
db.close();
}
return lid == -1 ? false : true;
}
/**
* this method will delete all the records associated with the specified notification id
*
* @param iNotificationiID
* the id on which the notification was sent
* @return this method will return <code>true</code> if the DB transaction was successful else it will return <code>false</code>
*/
public boolean deleteNotification(int iNotificationiID)
{
int result = 0;
SQLiteDatabase db = this.getWritableDatabase();
result = db.delete(_TableName, _NotificationID + " = " + iNotificationiID, new String[] {});
db.close();
if (result > 0)
{
return true;
}
else
{
return false;
}
}
/**
* this method will delete all the records from the database
*
* @return this method will return <code>true</code> if the DB transaction was successful else it will return <code>false</code>
*/
public boolean deleteAllNotifications()
{
int result = 0;
SQLiteDatabase db = this.getWritableDatabase();
result = db.delete(_TableName, null, new String[] {});
db.close();
if (result > 0)
{
return true;
}
else
{
return false;
}
}
/**
* this method will return the number of records present in the database
*
* @return the number of records present in the database
*/
public int getNotificationsCount()
{
String countQuery = "SELECT * FROM " + _TableName;
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = db.rawQuery(countQuery, null);
cursor.close();
// return count
return cursor.getCount();
}
public boolean markNotificationAsRead(int iNotificationiID)
{
// TODO Auto-generated method stub
int result = -1;
SQLiteDatabase db = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(_NotificationRead, 1);
// updating row
result = db.update(_TableName, values, _NotificationID + " = ?", new String[] { String.valueOf(iNotificationiID) });
db.close();
if (result > 0)
{
return true;
}
else
{
return false;
}
}
public boolean markAllNotificationAsRead()
{
// TODO Auto-generated method stub
int result = -1;
SQLiteDatabase db = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(_NotificationRead, 1);
// updating row
result = db.update(_TableName, values, null, new String[] {});
db.close();
if (result > 0)
{
return true;
}
else
{
return false;
}
}
/**
* gets all notification news from notifications database
*
* @return the list of the notification present in the database
*/
public ArrayList<NotificationCls> getAllUnreadNotifications()
{
ArrayList<NotificationCls> alNotifications = new ArrayList<NotificationCls>();
;
Cursor curData = null;
SQLiteDatabase db = null;
try
{
db = this.getReadableDatabase();
String strSelectQuery = "SELECT * FROM " + _TableName + " WHERE " + _NotificationRead + "=0";
curData = db.rawQuery(strSelectQuery, null);
if (curData.getCount() > 0)
{
curData.moveToFirst();
do
{
NotificationCls noti = new NotificationCls();
noti.setStrNotificationText(curData.getString(curData.getColumnIndex(_NotificationText)));
noti.setiNotificationiID(curData.getInt(curData.getColumnIndex(_NotificationID)));
alNotifications.add(noti);
}
while (curData.moveToNext());
}
}
catch (SQLException e)
{
e.printStackTrace();
}
catch (Exception e)
{
e.printStackTrace();
}
finally
{
if (curData != null)
{
curData.close();
}
if (db != null)
{
db.close();
}
}
return alNotifications;
}
and this is the entity class:
public class NotificationCls
{
String strNotificationText;
int iNotificationiID;
boolean bNotificationRead = false;
public String getStrNotificationText()
{
return strNotificationText;
}
public void setStrNotificationText(String strNotificationText)
{
this.strNotificationText = strNotificationText;
}
public int getiNotificationiID()
{
return iNotificationiID;
}
public void setiNotificationiID(int iNotificationiID)
{
this.iNotificationiID = iNotificationiID;
}
public boolean isbNotificationRead()
{
return bNotificationRead;
}
public void setbNotificationRead(boolean bNotificationRead)
{
this.bNotificationRead = bNotificationRead;
}
}
to get all data from SQLite in arraylist write below code in your activity:
DatabaseHelper_Notification databaseHelper_notification = new DatabaseHelper_Notification(this);
ArrayList<NotificationCls> alNotifications = databaseHelper_notification.getAllNotifications();
I hope this helps you...
