Connexion à android en utilisant la base de données

Question

Je suis nouveau sur Android et Java. Je fais un programme de page de connexion. Dans ce programme, je ne sais pas comment faire l'authentification de l'utilisateur ou le processus de validation.

s'il vous plaît aider moi

public class demo extends Activity implements OnClickListener { 
/** Called when the activity is first created. */ 
EditText txtbox1, txtbox2; 
private DataHelper dh; 
Button button2, button1; 
String name1, name2, name; 
String DB_PATH, DATABASE_NAME; 
String unames; 
TextView tv; 
private static final String TABLE_NAME = "table1"; 
    private DataHelper db; 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 
    txtbox1 = (EditText) findViewById(R.id.EditText01); 
    txtbox2 = (EditText) findViewById(R.id.EditText02); 
    button2 = (Button) findViewById(R.id.Button02); 
    button1 = (Button) findViewById(R.id.Button01); 
    button1.setOnClickListener(this); 
    button2.setOnClickListener(this); 
    tv = (TextView) this.findViewById(R.id.mywidget); 
     tv.setSelected(true); 
} 

@Override 
public void onClick(View v) { 
    // TODO Auto-generated method stub 
    int i = v.getId(); 
    { 
    if (i == R.id.Button01) { 
    name1 = txtbox1.getText().toString(); 
    name2 = txtbox2.getText().toString(); 

    System.out.println("txtbox1" + txtbox1); 
    System.out.println("name1" + name1); 
    System.out.println("name2" + name2); 

    StringBuilder sb = new StringBuilder(); 
    sb.append("Insert Employee Details:\n"); 
     dh = new DataHelper(this); 
      dh.deleteAll(); 
    dh.insert(name1); 
    dh.insert(name2); 

    Toast.makeText(getApplicationContext(), name1, 
     Toast.LENGTH_LONG).show(); 
    List<String> names = this.dh.selectAll(); 
    /* sb.append("Names in database:\n"); */ 
    for (String name : names) { 
    sb.append(name + "\n"); 
    System.out.println("name=" + names); 

    Log.d("EXAMPLE", "names size - " + names.size()); 
    } 

    } 
    } 
    if (i == R.id.Button02) 
    System.out.println("ok"); 
    System.out.println("name=" + unames); 

/*  GetValue(); 
*/ 
    { 
    if (name1.equals(unames)) { 
    System.out.println("ok1"); 
    Toast.makeText(getApplicationContext(), name1, 
     Toast.LENGTH_LONG).show(); 
    } else { 
    System.out.println("no"); 
    /* 
    * Toast.makeText(getApplicationContext(),no , 
    * Toast.LENGTH_LONG).show(); 
    */ 

    } 

    } 

} 
} 

partie de la base de données

public class DataHelper { 

private static final String DATABASE_NAME = "example1rrrr.db"; 
private static final int DATABASE_VERSION = 1; 
private static final String TABLE_NAME = "table1"; 
private static final String name = "name"; 
private static final String password = "password"; 
private static final String KEY_ROWID = "rowid"; 
private Context context; 
private static SQLiteDatabase db; 


private SQLiteStatement insertStmt; 
private static final String INSERT = "insert into " + TABLE_NAME 
    + "(name) values (?)"; 

public DataHelper(Context context) { 
    this.context = context; 
    OpenHelper openHelper = new OpenHelper(this.context); 
    this.db = openHelper.getWritableDatabase(); 
    this.insertStmt = this.db.compileStatement(INSERT); 
} 

public long insert(String name) { 
    this.insertStmt.bindString(1, name); 
    return this.insertStmt.executeInsert(); 
} 


public void deleteAll() { 
    this.db.delete(TABLE_NAME, null, null); 
} 

public List<String> selectAll() { 
    List<String> list = new ArrayList<String>(); 
    Cursor cursor = this.db.query(TABLE_NAME, new String[] { "name" }, 
    null, null, null, null, "name asc"); 
    if (cursor.moveToFirst()) { 
    do { 
    list.add(cursor.getString(0)); 
    } while (cursor.moveToNext()); 
    } 
    if (cursor != null && !cursor.isClosed()) { 
    cursor.close(); 
    } 
    return list; 
} 

private static class OpenHelper extends SQLiteOpenHelper { 

    OpenHelper(Context context) { 
    super(context, DATABASE_NAME, null, DATABASE_VERSION); 
    } 

    @Override 
    public void onCreate(SQLiteDatabase db) { 
    db.execSQL("CREATE TABLE " + TABLE_NAME 
    + "(id INTEGER PRIMARY KEY, name TEXT)"); 
    } 

    @Override 
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { 
    Log.w("Example", 
    "Upgrading database, this will drop tables and recreate."); 
    db.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME); 
    onCreate(db); 

    } 

Answer 1

Toute raison pour laquelle vous utilisez un db? Il serait plus facile de simplement stocker les données de connexion dans les préférences partagées:

http://developer.android.com/guide/topics/data/data-storage.html#pref