Création de base de donnée et affichage [SQLite]

Bonsoir,

Voila je suis developpeur sur un projet d'application android mais je nécessite une base de donnée pour pouvoir enregistrer des notifications dans la base de données et pouvoir les affichés et les supprimés.
J'ai un code qui bloquer car je n'arrive pas a comprendre comment cela fonctionne pour l'affichage et l'ajout dans la base de donnée.
Je ne sais pas comment procédé pour codé cela. J'ai une activité ou j'ai un listview qui devrait afficher les notrification et que je pourrais delete apres la lecture de celle-ci. J'ai une activité qui me permet d'ajouter a la base de données une notifications donc Un nom / Description / échéance mais celle-ci n'est pas relié a la base de donnée donc c'est juste un formulaire vide.

Voici le code de l'application :

Mon main :

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package com.example.maxime.appli100;
 
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.graphics.Typeface;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.NavigationView;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.text.format.DateFormat;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;
 
import java.util.Date;
import java.util.List;
 
public class MainActivity extends AppCompatActivity
        implements NavigationView.OnNavigationItemSelectedListener, View.OnClickListener {
 
    public TextView jourt = null;
    public TextView moist = null;
    public TextView titre_agenda = null;
    public ImageView icon_agenda = null;
    public ImageView cercle_date_acceuil = null;
    public ImageButton slide_layout = null;
    public boolean verif = Boolean.parseBoolean(null);
 
    public static boolean RepNotif = false;
    private NotificationDataSource datasource;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
 
        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
                this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
        drawer.setDrawerListener(toggle);
        toggle.syncState();
 
        NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
        navigationView.setNavigationItemSelectedListener(this);
 
        Date jour = new Date();
        CharSequence j = DateFormat.format("d", jour.getTime());
        jourt = (TextView) findViewById(R.id.jour);
        jourt.setText(j);
        Date mois = new Date();
        CharSequence m = DateFormat.format("MMM", mois.getTime());
        moist = (TextView) findViewById(R.id.mois);
        moist.setText(m);
 
        // Importation de la font de Assets
        Typeface typeface = Typeface.createFromAsset(getAssets(), "Roboto-Regular.ttf");
        // Assignation de la font au TextView
        moist.setTypeface(typeface);
        jourt.setTypeface(typeface);
 
        titre_agenda = (TextView) findViewById(R.id.titre_agenda);
        titre_agenda.setText("Cette semaine");
 
        icon_agenda = (ImageView) findViewById(R.id.icon_agenda);
        icon_agenda.setImageResource(R.drawable.vignette_agenda);
 
        cercle_date_acceuil = (ImageView) findViewById(R.id.cercle_date_acceuil);
        cercle_date_acceuil.setImageResource(R.drawable.cercle_date_acceuil);
 
        RelativeLayout slide_layout = (RelativeLayout) findViewById(R.id.notif1_layout);
        slide_layout.setOnClickListener(this);
 
        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View Views) {
                Intent addevent = new Intent(MainActivity.this, AddEvent.class);
                startActivity(addevent);
            }
        });
 
        DataBase();
    }
 
    private void DataBase(){
        datasource = new NotificationDataSource(this);
        datasource.open();
 
        List<String> values = datasource.getAllName();
 
        // utilisez SimpleCursorAdapter pour afficher les
        // �l�ments dans une ListView
        ArrayAdapter<Notification> adapter = new ArrayAdapter<Notification>(this,
                android.R.layout.simple_list_item_1, values);
        setListAdapter(adapter);
    }
 
    @Override
    public void onBackPressed() {
        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        if (drawer.isDrawerOpen(GravityCompat.START)) {
            drawer.closeDrawer(GravityCompat.START);
        } else {
            super.onBackPressed();
        }
    }
 
    @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, menu);
        return true;
    }
 
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
 
        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }
 
        return super.onOptionsItemSelected(item);
    }
 
    @SuppressWarnings("StatementWithEmptyBody")
    @Override
    public boolean onNavigationItemSelected(MenuItem item) {
        // Handle navigation view item clicks here.
        int id = item.getItemId();
 
        if (id == R.id.nav_acceuil) {
            Intent intentacceuil = new Intent(this, MainActivity.class);
            intentacceuil.putExtra("Acceuil", "nav_acceuil");
            startActivity(intentacceuil);
        } else if (id == R.id.nav_planning_cours) {
            Intent intentplanning = new Intent(this, PlanningCours.class);
            intentplanning.putExtra("Planning", "nav_planning_cours");
            startActivity(intentplanning);
        } else if (id == R.id.nav_groupe_class) {
 
        } else if (id == R.id.nav_agenda) {
 
        } else if (id == R.id.nav_note) {
 
        } else if (id == R.id.nav_stats) {
 
        } else if (id == R.id.nav_profil) {
 
        }
 
        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        drawer.closeDrawer(GravityCompat.START);
        return true;
    }
 
    //Fonction click des notifs
    @Override
    public void onClick(View v) {
        notif(R.id.notif_acceuil);
 
    }
 
    // Fonction pour les notifs
    public void notif(int res){
        if (verif == false) {
            RelativeLayout layout_slide = (RelativeLayout) findViewById(res);
            layout_slide.setVisibility(View.VISIBLE);
            verif = true;
            RelativeLayout.LayoutParams params = (RelativeLayout.LayoutParams) layout_slide.getLayoutParams();
            params.setMargins(0, 150, 0, 0);
            layout_slide.setLayoutParams(params);
            slide_layout = (ImageButton) findViewById(R.id.arrow_notif1);
            slide_layout.setImageResource(R.mipmap.ic_arrow_drop_up);
 
        } else if (verif == true) {
            RelativeLayout layout_slide = (RelativeLayout) findViewById(res);
            layout_slide.setVisibility(View.INVISIBLE);
            verif = false;
            RelativeLayout.LayoutParams params = (RelativeLayout.LayoutParams) layout_slide.getLayoutParams();
            params.setMargins(0, -300, 0, 0);
            layout_slide.setLayoutParams(params);
            slide_layout = (ImageButton) findViewById(R.id.arrow_notif1);
            slide_layout.setImageResource(R.mipmap.ic_arrow_drop_down);
 
        }
    }
 
    // Sera appel�e par l'attribut onClick
    // des boutons d�clar�s dans main.xml
    public void onClick(View view) {
        @SuppressWarnings("unchecked")
        ArrayAdapter<Comment> adapter = (ArrayAdapter<Comment>) getListAdapter();
        Comment comment = null;
        switch (view.getId()) {
            case R.id.add:
                String[] comments = new String[] { "Cool", "Very nice", "Hate it" };
                int nextInt = new Random().nextInt(3);
                // enregistrer le nouveau commentaire dans la base de donn�es
                comment = datasource.createComment(comments[nextInt]);
                adapter.add(comment);
                break;
            case R.id.delete:
                if (getListAdapter().getCount() > 0) {
                    comment = (Comment) getListAdapter().getItem(0);
                    datasource.deleteComment(comment);
                    adapter.remove(comment);
                }
                break;
        }
        adapter.notifyDataSetChanged();
    }
 
    @Override
    protected void onResume() {
        datasource.open();
        super.onResume();
    }
 
    @Override
    protected void onPause() {
        datasource.close();
        super.onPause();
    }
 
 
}

Base de donnée :

Code:

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package com.example.maxime.appli100;
 
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.provider.BaseColumns;
 
/**
 * Created by Maxime on 20/01/2016.
 */
public final class DataBaseNotif extends SQLiteOpenHelper {
 
    /* Inner class that defines the table contents */
    public static abstract class DateBase implements BaseColumns {
        public static final String COLUMN_NAME_ID = "id";
        public static final String COLUMN_NAME_NAME = "nom";
        public static final String COLUMN_NAME_DESCRIPTION = "description";
        public static final String COLUMN_NAME_ECHEANCE = "echeance";
    }
 
 
    public static final int VERSION_TABLE = 1;
 
    public static final String NOTIF_TABLE_NAME = "Notification";
    public static final String NOTIF_TABLE_CREATE=
            "CREATE TABLE " + NOTIF_TABLE_NAME + " (" +
                    DateBase.COLUMN_NAME_ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " +
                    DateBase.COLUMN_NAME_NAME + " TEXT, " +
                    DateBase.COLUMN_NAME_DESCRIPTION + " TEXT, " +
                    DateBase.COLUMN_NAME_ECHEANCE + " TEXT);";
 
    public static final String METIER_TABLE_DROP = "DROP TABLE IF EXISTS " + NOTIF_TABLE_NAME + ";";
 
    public DataBaseNotif(Context context) {
        super(context, NOTIF_TABLE_NAME, null, VERSION_TABLE);
    }
 
    @Override
    public void onCreate(SQLiteDatabase db) {
        db.execSQL(NOTIF_TABLE_CREATE);
    }
 
    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        db.execSQL(METIER_TABLE_DROP);
        onCreate(db);
    }
 
    public void onDowngrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        onUpgrade(db, oldVersion, newVersion);
    }
 
}

Les getter and setters de la base de donnée :

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package com.example.maxime.appli100;
 
/**
 * Created by Maxime on 20/01/2016.
 *
 */
public class Notification {
    // Notez que l'identifiant est un long
    private String id;
    private String nom;
    private String description;
    private String echeance;
 
    public Notification(String id, String nom, String description, String echeance) {
        super();
        this.id = id;
        this.nom = nom;
        this.description = description;
        this.echeance = echeance;
    }
 
    public Notification(){
 
    }
 
    public String getId() {
        return id;
    }
 
    public void setId(String id) {
        this.id = id;
    }
 
    public String getNom() {
        return nom;
    }
 
    public String getDescription() {
        return description;
    }
 
    public String getEcheance() {
        return echeance;
    }
 
    public void setNom(String nom) {
        this.nom = nom;
    }
 
    public void setDescription(String description) {
        this.description = description;
    }
 
    public void setEcheance(String echeance) {
        this.echeance = echeance;
    }
 
    @Override
    public String toString() {
        return "Notification{" +
                "id='" + id + '\'' +
                ", nom='" + nom + '\'' +
                ", description='" + description + '\'' +
                ", echeance='" + echeance + '\'' +
                '}';
    }
}

Les fonctions sur laquelle je bloque pour prendre les notifications et les affichés :

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package com.example.maxime.appli100;
 
/**
 * Created by Maxime on 20/01/2016.
 */
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
 
import com.example.maxime.appli100.Notification;
 
import java.util.ArrayList;
import java.util.List;
 
public class NotificationDataSource {
 
    // Champs de la base de données
    private SQLiteDatabase database;
    private DataBaseNotif dbHelper;
    private String[] allColumns = { DataBaseNotif.DateBase.COLUMN_NAME_ID,
            DataBaseNotif.DateBase.COLUMN_NAME_NAME,
            DataBaseNotif.DateBase.COLUMN_NAME_DESCRIPTION,
            DataBaseNotif.DateBase.COLUMN_NAME_ECHEANCE,};
 
    Notification notif = new Notification();
 
    public NotificationDataSource(Context context) {
        dbHelper = new DataBaseNotif(context);
    }
 
    public void open() throws SQLException {
        database = dbHelper.getWritableDatabase();
    }
 
    public void close() {
        dbHelper.close();
    }
 
    /*
        COMMANDE POUR GERER LE NOM DES NOTIFICATIONS
    */
 
    public String createName(String Name) {
        ContentValues values = new ContentValues();
        values.put(DataBaseNotif.DateBase.COLUMN_NAME_NAME, Name);
        long insertId = database.insert(DataBaseNotif.DateBase.COLUMN_NAME_NAME, null,
                values);
        Cursor cursor = database.query(DataBaseNotif.DateBase.COLUMN_NAME_NAME,
                allColumns, DataBaseNotif.DateBase.COLUMN_NAME_ID + " = " + insertId, null,
                null, null, null);
        cursor.moveToFirst();
        String newName = cursorToName(cursor).getNom();
        cursor.close();
        return newName;
    }
 
    public void deleteName(Notification N) {
        String id = N.getId();
        System.out.println("Comment deleted with id: " + id);
        database.delete(DataBaseNotif.DateBase.COLUMN_NAME_NAME, DataBaseNotif.DateBase.COLUMN_NAME_ID
                + " = " + id, null);
    }
 
 
    public List<String> getAllName() {
        List<String> names = new ArrayList<>();
 
        Cursor cursor = database.query(DataBaseNotif.DateBase.COLUMN_NAME_NAME,
                allColumns, null, null, null, null, null);
 
        cursor.moveToFirst();
        while (!cursor.isAfterLast()) {
            String name = cursorToName(cursor).getNom(); //Ligne modifiée
            names.add(name);
            cursor.moveToNext();
        }
        // assurez-vous de la fermeture du curseur
        cursor.close();
        return names;
    }
 
 
    private Notification cursorToName(Cursor cursor) {
        Notification n = new Notification();
        n.setId(cursor.getString(0));
        n.setNom(cursor.getString(1));
        return n;
    }
 
    /*
        COMMANDE POUR GERER LA DESCRIPTION DES NOTIFICATIONS
    */
 
    public String createDescription(String Name) {
        ContentValues values = new ContentValues();
        values.put(DataBaseNotif.DateBase.COLUMN_NAME_DESCRIPTION, Name);
        long insertId = database.insert(DataBaseNotif.DateBase.COLUMN_NAME_DESCRIPTION, null,
                values);
        Cursor cursor = database.query(DataBaseNotif.DateBase.COLUMN_NAME_DESCRIPTION,
                allColumns, DataBaseNotif.DateBase.COLUMN_NAME_ID + " = " + insertId, null,
                null, null, null);
        cursor.moveToFirst();
        String newName = cursorToName(cursor).getNom();
        cursor.close();
        return newName;
    }
 
    public void deleteDescription(Notification N) {
        String id = N.getId();
        System.out.println("Comment deleted with id: " + id);
        database.delete(DataBaseNotif.DateBase.COLUMN_NAME_DESCRIPTION, DataBaseNotif.DateBase.COLUMN_NAME_ID
                + " = " + id, null);
    }
 
 
    public List<String> getAllDescription() {
        List<String> names = new ArrayList<>();
 
        Cursor cursor = database.query(DataBaseNotif.DateBase.COLUMN_NAME_DESCRIPTION,
                allColumns, null, null, null, null, null);
 
        cursor.moveToFirst();
        while (!cursor.isAfterLast()) {
            String name = cursorToName(cursor).getNom(); //Ligne modifiée
            names.add(name);
            cursor.moveToNext();
        }
        // assurez-vous de la fermeture du curseur
        cursor.close();
        return names;
    }
 
 
    private Notification cursorToDescription(Cursor cursor) {
        Notification n = new Notification();
        n.setId(cursor.getString(0));
        n.setNom(cursor.getString(1));
        return n;
    }
 
    /*
        COMMANDE POUR GERER LES ECHEANCES DES NOTIFICATIONS
    */
 
    public String createEcheance(String Name) {
        ContentValues values = new ContentValues();
        values.put(DataBaseNotif.DateBase.COLUMN_NAME_ECHEANCE, Name);
        long insertId = database.insert(DataBaseNotif.DateBase.COLUMN_NAME_ECHEANCE, null,
                values);
        Cursor cursor = database.query(DataBaseNotif.DateBase.COLUMN_NAME_ECHEANCE,
                allColumns, DataBaseNotif.DateBase.COLUMN_NAME_ID + " = " + insertId, null,
                null, null, null);
        cursor.moveToFirst();
        String newName = cursorToName(cursor).getNom();
        cursor.close();
        return newName;
    }
 
    public void deleteEcheance(Notification N) {
        String id = N.getId();
        System.out.println("Comment deleted with id: " + id);
        database.delete(DataBaseNotif.DateBase.COLUMN_NAME_ECHEANCE, DataBaseNotif.DateBase.COLUMN_NAME_ID
                + " = " + id, null);
    }
 
 
    public List<String> getAllEcheance() {
        List<String> names = new ArrayList<>();
 
        Cursor cursor = database.query(DataBaseNotif.DateBase.COLUMN_NAME_ECHEANCE,
                allColumns, null, null, null, null, null);
 
        cursor.moveToFirst();
        while (!cursor.isAfterLast()) {
            String name = cursorToName(cursor).getNom(); //Ligne modifiée
            names.add(name);
            cursor.moveToNext();
        }
        // assurez-vous de la fermeture du curseur
        cursor.close();
        return names;
    }
 
 
    private Notification cursorToEcheance(Cursor cursor) {
        Notification n = new Notification();
        n.setId(cursor.getString(0));
        n.setNom(cursor.getString(1));
        return n;
    }
}

Voici l'activité qui permet d'ajouté une notification (Non fonctionnel, il faut faire le lien avec la base de donnée):

Code:

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package com.example.maxime.appli100;
 
import android.content.ContentValues;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.os.Bundle;
import android.os.Parcel;
import android.provider.ContactsContract;
import android.renderscript.ScriptGroup;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.widget.EditText;
import android.widget.Toast;
import com.example.maxime.appli100.MainActivity.*;
 
 
 
public class AddEvent extends AppCompatActivity {
 
    private String titre;
    private String description;
    private String echeance;
 
    EditText titre_edit;
    EditText description_edit;
    EditText echeance_edit;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_add_event);
        //Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        //setSupportActionBar(toolbar);
 
        titre_edit = (EditText)findViewById(R.id.titre_event);
        description_edit = (EditText)findViewById(R.id.description_event);
        echeance_edit = (EditText)findViewById(R.id.echeance_event);
 
        android.support.v7.app.ActionBar actionBar = this.getSupportActionBar();
        actionBar.setDefaultDisplayHomeAsUpEnabled(true);
    }
 
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        super.onCreateOptionsMenu(menu);
        MenuInflater inflater = getMenuInflater();
        //R.menu.menu est l'id de notre menu
        inflater.inflate(R.menu.add_event, menu);
        return true;
    }
 
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
 
        //noinspection SimplifiableIfStatement
        if (id == R.id.enregistrer) {
 
            titre = titre_edit.getText().toString();
            description = description_edit.getText().toString();
            echeance = echeance_edit.getText().toString();
 
            DataBaseNotif bdNotif = new DataBaseNotif(getApplicationContext());
            SQLiteDatabase db = bdNotif.getWritableDatabase();
 
            ContentValues values = new ContentValues();
            values.put(DataBaseNotif.DateBase.COLUMN_NAME_ID, id);
            values.put(DataBaseNotif.DateBase.COLUMN_NAME_NAME, titre);
            values.put(DataBaseNotif.DateBase.COLUMN_NAME_DESCRIPTION, description);
            values.put(DataBaseNotif.DateBase.COLUMN_NAME_ECHEANCE, echeance);
 
            db.insert(DataBaseNotif.NOTIF_TABLE_NAME, DataBaseNotif.DateBase.COLUMN_NAME_NAME, values);
            db.insert(DataBaseNotif.NOTIF_TABLE_NAME, DataBaseNotif.DateBase.COLUMN_NAME_DESCRIPTION, values);
            db.insert(DataBaseNotif.NOTIF_TABLE_NAME, DataBaseNotif.DateBase.COLUMN_NAME_ECHEANCE, values);
 
            DataBase();
 
            Toast.makeText(AddEvent.this, "OkaySuper", Toast.LENGTH_LONG).show();
            return true;
        }
 
        return super.onOptionsItemSelected(item);
    }
 
    public void DataBase(){
 
        DataBaseNotif bdNotif = new DataBaseNotif(getApplicationContext());
        SQLiteDatabase db = bdNotif.getReadableDatabase();
        Cursor c = db.rawQuery("select * from " + DataBaseNotif.NOTIF_TABLE_NAME, null);
 
 
        while (c.moveToNext()) {
            String id = c.getString(0);
            String nom = c.getString(1);
            String description = c.getString(2);
            String echeance = c.getString(3);
            Notification n = new Notification(id, nom, description, echeance);
 
        }
        c.close();
 
    }
}

Tout d'abord je te remercie si tu est arrivée jusque là.
Si tout-fois tu arrive a m'aidez a comprendre comment fonctionne les base de donnée sous android et que tu est motivé a m'aidez n'hésite pas a me poser des questions si tu ne comprend pas certaine chose ;)
Merci pour ta futur réponse je l'espère.
Bonne soirée .
Rweisha