從SQLite顯示記錄到ListView中

雖然這個問題在這裏已經問了很多次，但我找不到適合我的代碼的正確答案。我意識到它可能很小，但我似乎無法找到問題。從SQLite顯示記錄到ListView中

這是我的RunDatabase類。

 // Getting All Contacts 
public List<RecordLists> getAllContacts() { 
    List<RecordLists> contactList = new ArrayList<RecordLists>(); 
    // Select All Query 
    String selectQuery = "SELECT * FROM " + TABLE_NAME; 
    CustomSQLiteOpenHelper helper = new CustomSQLiteOpenHelper(context); 
    SQLiteDatabase db = helper.getWritableDatabase(); 
    Cursor cursor = db.rawQuery(selectQuery, null); 

    // looping through all rows and adding to list 
    if (cursor.moveToFirst()) { 
     do { 
      RecordLists contact = new RecordLists(); 
      contact.setId(Integer.parseInt(cursor.getString(0))); 
      contact.setUserName(cursor.getString(1)); 
      contact.setFirstName(cursor.getString(2)); 
      contact.setLastName(cursor.getString(3)); 
      contact.setPassword(cursor.getString(4)); 

      String name = cursor.getString(1) +"\n"+ cursor.getString(2) + "\n" + cursor.getString(3) + "\n" + cursor.getString(4); 
      AllRecords.ArrayofName.add(name); 
      // Adding contact to list 
      contactList.add(contact); 
     } while (cursor.moveToNext()); 
    } 

    // return contact list 
    return contactList; 
}

現在我在另一個活動是AllRecords.java調用這個和代碼是：

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.fragment_main); 

     try { 
      RunDatabase db = new RunDatabase(this); 

      // Reading all contacts 
      Log.d("Reading: ", "Reading all Records.."); 


      List<RecordLists> contacts = db.getAllContacts(); 
      ArrayAdapter<RecordLists> adapter = new ArrayAdapter<RecordLists>(this, R.layout.records, contacts); 
      for (RecordLists cn : contacts) 
      { 
      final String log = "Id: "+cn.getId()+ " ,UserName " + cn.getUserName() + " ,FirstName: " + cn.getFirstName() + " ,LastName: " + cn.getLastName() + " ,Password " + cn.getPassword(); 
       // Writing Contacts to log  
      Log.d("Name: ", log); 

        RecordList = (ListView) findViewById(R.id.list_View); 
        RecordList.setEmptyView(findViewById(android.R.id.empty)); 
        RecordList.setAdapter(adapter);

來源

2014-05-07 Umair

如果tou使用遊標，則使用遊標適配器而不是陣列適配器來填充列表視圖 – Siva

你的問題和你卡在哪裏？你有嘗試過什麼嗎？你得到的輸出是什麼？ – Sripathi

@Siva但它的投擲錯誤... – Umair

光標適配器來填充返回列表視圖和數據從數據庫中的最佳選擇。。下面是根據您的要求更改遊標適配器的示例代碼。

public class adapter extends CursorAdapter{ 

     public adapter (Context context, Cursor c) { 
      super(context, c); 
      // TODO Auto-generated constructor stub 
     } 

     @Override 
     public void bindView(View view, Context context, Cursor c) { 
      // TODO Auto-generated method stub 


      //here write code for populating list view 

     } 

     @Override 
     public View newView(Context context, Cursor cursor, ViewGroup parent) { 
      // TODO Auto-generated method stub 

      LayoutInflater inflate=LayoutInflater.from(context); 
      View v=inflate.inflate(R.layout.records, parent,false); 
      bindView(v, context, cursor); 
      return v; 
     } 


    }

現在通過在需要的地方創建對象來調用適配器。

來源

2014-05-07 12:13:50 Siva

非常感謝它的工作... :) – Umair

不客氣... – Siva

從SQLite顯示記錄到ListView中

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