Database save user and retrive

MyActivity.java

public class MyActivity extends ActionBarActivity {

    SomsDatabaseAdapter somsDatabaseAdapter;
    EditText userName,passWord;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_my);

        userName = (EditText) findViewById(R.id.edittext_username);
        passWord = (EditText) findViewById(R.id.edittext_password);

        somsDatabaseAdapter = new SomsDatabaseAdapter(this);
    }
    public void addUser(View view){
        String user = userName.getText().toString();
        String pass = passWord.getText().toString();

        long id = somsDatabaseAdapter.insertData(user,pass);
        if(id<0){
            Message.message(this,"Un Successfull");
        }else{
            Message.message(this,"Successfull inserted a row, row number "+id);
        }

    }
    public void viewDetails(View view){
        String data = somsDatabaseAdapter.getAllData();
        Message.message(this,data);
    }
}

SomsDatabaseAdapter.java

public class SomsDatabaseAdapter{

    SomsHelper helper;
    public SomsDatabaseAdapter(Context context){
        helper= new SomsHelper(context);
    }
    public long insertData(String name,String password){
        SQLiteDatabase db = helper.getWritableDatabase();
        ContentValues contentValues = new ContentValues();
        contentValues.put(SomsHelper.NAME, name);
        contentValues.put(SomsHelper.PASSWORD, password);
        long id =db.insert(SomsHelper.TABLE_NAME,null,contentValues);
        return id;
    }
    public String getAllData(){
        SQLiteDatabase db = helper.getWritableDatabase();
        //select -id,NAME,Password from SomuHelper
        String[] columns={SomsHelper.UID, SomsHelper.NAME, SomsHelper.PASSWORD};
        Cursor cursor = db.query(SomsHelper.TABLE_NAME, columns, null, null, null, null, null);
        StringBuffer buffer = new StringBuffer();
        while(cursor.moveToNext()){
            //int index1 = cursor.getColumnIndex(SomsHelper.UID);
            int cid = cursor.getInt(0);
            String name = cursor.getString(1);
            String password = cursor.getString(2);
            buffer.append(cid+" "+name+" "+password+"\n");
        }
        return buffer.toString();
    }

   static class SomsHelper  extends SQLiteOpenHelper {
       private static final String DATABASE_NAME = "somsdatabase";
       private static final String TABLE_NAME = "SOMSTABLE";
       private static final String UID = "_id";
       private static final String NAME = "Name";
       private static final String PASSWORD = "Password";
       private static final String CREATE_TABLE="CREATE TABLE "+TABLE_NAME+" ("+UID+" INTEGER PRIMARY KEY AUTOINCREMENT, "+NAME+" VARCHAR(255), "+PASSWORD+" VARCHAR(255));";
       private static final String DROP_TABLE="DROP TABLE IF EXISTS "+TABLE_NAME;
       private static final int DATABASE_VERSION = 7;
       private Context context;

       public SomsHelper(Context context){
           super(context, DATABASE_NAME, null, DATABASE_VERSION);
           this.context = context;
           Message.message(context,"constructor called");
       }
       @Override
       public void onCreate(SQLiteDatabase db) {
           //first time called when db is created
           //CREATE TABLE SOMSTABLE (_id INTEGER PRIMARYKEY AUTOINCREMENT, Name VARCHAR(255));
           try {
               db.execSQL(CREATE_TABLE);
               Message.message(context,"OnCreate called");
           } catch (SQLException e) {
               Message.message(context,""+e);
           }


       }

       @Override
       public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
           try {
               Message.message(context,"OnUpgrade called");
               db.execSQL(DROP_TABLE);
               onCreate(db);
           } catch (SQLException e) {
               Message.message(context,""+e);
           }
       }
   }
}