無法添加新的記錄到sqlite數據庫android

Question

我想在我的sqlite數據庫中添加新記錄。我沒有得到任何錯誤，但也沒有看到數據庫中的任何類型的記錄，當我看到數據庫使用sqlite經理 以下是我寫的代碼。 PLZ幫助我擺脫這個問題。

以下是我的數據庫處理程序的代碼..

enter code here 
import android.content.ContentValues; 
import android.content.Context; 
import android.database.Cursor; 
import android.database.sqlite.SQLiteDatabase; 
import android.database.sqlite.SQLiteDatabase.CursorFactory; 
import android.database.sqlite.SQLiteOpenHelper; 
import android.util.Log; 
import android.widget.Toast; 

public class DatabaseHandler extends SQLiteOpenHelper 
{ 

private static final int DATABASE_VERSON=1; 
private static final String DATABASE_NAME="Info_manager"; 
private static final String TABLE_DETAILS = "info_detail"; 

// Contacts Table Columns names 
private static final String KEY_ID = "id"; 
private static final String KEY_FNAME = "f_name"; 
private static final String KEY_LNAME = "l_name"; 
private static final String KEY_PH_NO = "c_num"; 
private static final String KEY_EMAIL = "e_mail"; 



public DatabaseHandler(Context context) 
{ 
    super(context,null , null, 1); 
} 

@Override 
public void onCreate(SQLiteDatabase db) 
{ 
    //db = this.getWritableDatabase(); 
    ///System.out.println("----333------"); 
    String CREATE_DETAILS_TABLE = "CREATE TABLE " + TABLE_DETAILS 
    + "(" 
    + KEY_ID + " INTEGER PRIMARY KEY AUTOINCREMENT," + KEY_FNAME + " TEXT," + KEY_LNAME + " TEXT," + KEY_PH_NO + " TEXT," + KEY_EMAIL + " TEXT " + ")"; 

    db.execSQL(CREATE_DETAILS_TABLE); 
    ///System.out.println("----444------"); 
} 

@Override 
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) 
{ 
    // Drop older table if existed 
    db.execSQL("DROP TABLE IF EXISTS " + TABLE_DETAILS); 
    // Create tables again 
    onCreate(db); 

} 


// Adding new contact 
void addContact(Contact contact) 
{ 
    SQLiteDatabase db = this.getWritableDatabase(); 
    // ContentValues values = new ContentValues(); 

    String sql; 
    sql = "INSERT INTO info_detail (f_name, l_name, c_num, e_mail) " + 
    "VALUES ('" + contact.getfName().toString() + "', '" + contact.getlName().toString() + "', '" + contact.getContactNumber().toString()+ "', '" + contact.getEmailAddress().toString() +"')"; 

    db.execSQL(sql); 

    /*values.put(KEY_FNAME, contact.getfName()); 
    values.put(KEY_LNAME, contact.getlName()); 
    values.put(KEY_PH_NO, contact.getContactNumber()); 
    values.put(KEY_EMAIL, contact.getEmailAddress());*/ 
    // Inserting Row 
    System.out.print("----inserting----"); 
    //db.insert(TABLE_DETAILS, null, values); 

    System.out.print("----inserted----"); 
    db.close(); 
} 

}

和下面是我把它叫做處理器

public class SQLitelActivity extends Activity implements OnClickListener 
{ 

EditText fname,lname,con_num,email_adr; 
Button savebtn,viewbtn; 
DatabaseHandler db; 
//SQLiteDatabase db; 
@Override 
public void onCreate(Bundle savedInstanceState) 
{ 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_sqlitel); 

    fname=(EditText)findViewById(R.id.fname); 
    lname=(EditText)findViewById(R.id.lname); 
    con_num=(EditText)findViewById(R.id.cnumber); 
    email_adr=(EditText)findViewById(R.id.email); 

    savebtn=(Button)findViewById(R.id.save); 
    viewbtn=(Button)findViewById(R.id.view); 

    db=new DatabaseHandler(this); 

    savebtn.setOnClickListener(new OnClickListener() 
    { 
     @Override 
     public void onClick(View v) 
     { 
      //System.out.println("----111------"); 
      db.addContact(new Contact(fname.getText().toString() 
        , lname.getText().toString(),con_num.getText().toString(),email_adr.getText().toString())); 
     // System.out.println("----222------"); 
     } 
    } 
    ); 

Answer 1

這裏的活動與修改代碼，

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

你錯過了數據庫名稱在超級構造函數。

，我使用下面的方法來添加聯繫人數據庫，

// Adding new contact 
    void addContact(Contact contact) { 
     SQLiteDatabase db = this.getWritableDatabase(); 

     ContentValues values = new ContentValues(); 
     values.put(KEY_FNAME, contact.getfName().toString()); // Contact First Name 
     values.put(KEY_LNAME, contact.getlName().toString()); // Contact Last Name 
     values.put(KEY_PH_NO, contact.getContactNumber().toString()); // Contact Number 
     values.put(KEY_EMAIL, contact.getEmailAddress().toString()); // Contact Email 

     // Inserting Row 
     db.insert(TABLE_CONTACTS, null, values); 
     db.close(); // Closing database connection 
    } 

我希望這會幫助你。謝謝。