Kann meine Daten nicht in meiner SQLite-Datenbank anzeigen [Android]

Question

Ich weiß nicht, was schief gelaufen ist, aber wenn ich auf Login klicke, werden die Werte nicht angezeigt. dies ist mein Code für die profile.java ist

TextView vName = (TextView) findViewById(R.id.tvName); 
    TextView vEmail = (TextView) findViewById(R.id.tvEmail); 
    TextView vMobile = (TextView) findViewById(R.id.tvMobile); 

    Contact contact = new Contact(); 
    vName.setText(contact.getName().toString()); 
    vEmail.setText(contact.getEmail().toString()); 
    vMobile.setText(contact.getMobile().toString()); 

    Button btnOut = (Button) findViewById(R.id.btnOut); 
    btnOut.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      Intent Outent = new Intent(Profile.this,MainActivity.class); 
      startActivity(Outent); 
      finish(); 
     } 
    }); 

Hier ist meine Datenbank, habe ich versucht, eine Methode in meinem DatabaseHelper.java machen aber immer noch hat es nicht funktioniert. Ich hätte gerne Hilfe von Profis wie euch. DatabaseHelper.java

private static final String TABLE_CREATE = "create table contacts(id integer primary key not null ,"+ 
     "name text not null, email text not null, pass text not null, mobile text not null);"; 

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


@Override 
public void onCreate(SQLiteDatabase db) { 
    db.execSQL(TABLE_CREATE); 
    this.db =db; 
} 

public void insertContact(Contact c){ 
    db = this.getWritableDatabase(); 
    ContentValues values = new ContentValues(); 

    String query = "select * from contacts"; 
    Cursor cursor = db.rawQuery(query,null); 
    int count = cursor.getCount(); 


    values.put(COLUMN_ID,count); 
    values.put(COLUMN_NAME,c.getName()); 
    values.put(COLUMN_EMAIL,c.getEmail()); 
    values.put(COLUMN_PASS, c.getPass()); 
    values.put(COLUMN_MOBILE, c.getMobile()); 

    db.insert(TABLE_NAME,null,values); 
    db.close(); 
} 

public Cursor getAllData(){ 
    SQLiteDatabase db = this.getWritableDatabase(); 
    Cursor res = db.rawQuery("select email,name,mobile from"+TABLE_NAME,null); 
    return res; 
} 

public String searchPass(String email){ 
    db = this.getReadableDatabase(); 
    String query = "select email, pass from " + TABLE_NAME; 
    Cursor cursor = db.rawQuery(query,null); 
    String a, b; 
    b = "not found"; 
    if(cursor.moveToFirst()){ 
     do{ 
      a = cursor.getString(0); 

      if(a.equals(email)){ 
       b = cursor.getString(1); 
       break; 
      } 
     }while(cursor.moveToNext()); 
    } 
    return b; 
} 

@Override 
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { 
    String query = "DROP TABLE IF EXISTS" + TABLE_NAME; 
    db.execSQL(query); 
    this.onCreate(db); 
} 

Answer 1

Sie sind nicht getAllData() in Ihrem Profil Aktivitäts aufrufen.

ProfileActivity

List<Contact> contacts = db.getAllData();   
     for (Contact cn : contacts) { 
      String name = cn.getName(); 
      vName.setText(name); 
      // follow by getEmail and getMobile 
     } 

DatabaseHelper

// Getting All Data 
    public List<Contact> getAllData() { 
     List<Contact> contactList = new ArrayList<Contact>(); 
     // Select All Query 
     String selectQuery = "SELECT email,name,mobile from"+TABLE_NAME; 

     SQLiteDatabase db = this.getWritableDatabase(); 
     Cursor cursor = db.rawQuery(selectQuery, null); 

     // looping through all rows and adding to list 
     if (cursor.moveToFirst()) { 
      do { 
       Contact contact = new Contact(); 
       contact.setName((cursor.getString(0)); 
       contact.setEmail(cursor.getString(1)); 
       contact.setMobile(cursor.getString(2)); 
       contactList.add(contact); 
      } while (cursor.moveToNext()); 
     } 

     return contactList; 
    } 

Hoffentlich ist es genau und hilfreich.