將數據顯示到列表視圖中

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以下代碼在listview中顯示來自sqlite數據庫的信息。它顯示日期和列表視圖允許我點擊，當我點擊一個日期時，它顯示我在該日期在列表視圖上完成的信息。我的問題是，當我在這個日期保存數據12.01.2013和我重複同一日期後，然後它顯示相同的日期兩次，我想它只是顯示一個日期，當我點擊它來顯示我的數據，我在早上保存，並且我在同一天晚些時候保存的數據不是兩個相似的日期。將數據顯示到列表視圖中

hereis代碼

public class Pro extends Activity implements OnItemClickListener { 

    private ListView uNamesListView; 

     private ListAdapter customerListAdapter; 
     private ArrayList<PojoClass> pojoArrayList; 

    final Context context = this; 
    private Button button; 
    private TextView result; 
    DBAdapter db = new DBAdapter(this); 

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

     uNamesListView = (ListView) findViewById(R.id.listView1); 
     uNamesListView.setOnItemClickListener(this); 

     pojoArrayList = new ArrayList<PojoClass>(); 
     customerListAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, populateList()); 
     uNamesListView.setAdapter(customerListAdapter);     


    } 

      public List<String> populateList() { 


       List<String> uGraduateNamesList = new ArrayList<String>(); 
       DatabaseHelper openHelperClass = new DatabaseHelper(this); 
       SQLiteDatabase sqliteDatabase = openHelperClass.getReadableDatabase(); 
       Cursor cursor = sqliteDatabase.query(DBAdapter.SCAN_TABLE, null, null, null, null, null, null); 
       startManagingCursor(cursor); 
       while (cursor.moveToNext()) { 

        String cDate = cursor.getString(cursor.getColumnIndex(DBAdapter.COLUMN_Date)); 
        String cMeterNumber = cursor.getString(cursor.getColumnIndex(DBAdapter.COLUMN_MeterNumber)); 
        String cVname = cursor.getString(cursor.getColumnIndex(DBAdapter.COLUMN_Vname)); 
        String cPname = cursor.getString(cursor.getColumnIndex(DBAdapter.COLUMN_PName)); 

        PojoClass ss = new PojoClass(); 
        ss.SetName(cDate); 
        ss.SetSurname(cMeterNumber); 
        ss.SetID(cVname); 
        ss.SetHaddress(cPname); 
       pojoArrayList.add(ss); 

        uGraduateNamesList.add(cDate); 
       } 
       sqliteDatabase.close(); 

       return uGraduateNamesList; 

    } 

    @Override 
    public void onItemClick(AdapterView<?> aa, View view, int ss, long bb) { 
     // TODO Auto-generated method stub 
     Intent updateCustomerIntent = new Intent(Pro.this, ViewByVendor.class); 

     updateCustomerIntent.putExtra("product", product); 
     startActivity(updateCustomerIntent); 

     Toast.makeText(getApplicationContext(), "Clicked on :" + ss, Toast.LENGTH_SHORT).show(); 
     PojoClass clickedObject = pojoArrayList.get(ss); 

     Bundle dataBundle = new Bundle(); 

     dataBundle.putString("clickedDate", clickedObject.getDates()); 
     dataBundle.putString("clickedMeterNumber", clickedObject.getMeterNumber()); 
     dataBundle.putString("clickedVname", clickedObject.getVname()); 
     dataBundle.putString("clickedPname", clickedObject.getPname()); 
     updateCustomerIntent.putExtras(dataBundle); 
     startActivity(updateCustomerIntent); 


    } 


}

我會感謝你的幫助。

來源

2013-01-11 CoT

閱讀列表視圖的日期時，您只需要唯一日期。在SQL中，這可與DISTINCT或GROUP BY來完成：

SELECT DISTINCT Date FROM ScanTable 
SELECT Date FROM ScanTable GROUP BY Date

Android的代碼是這樣的：

cursor = db.query(true,      // <-- distinct 
        DBAdapter.SCAN_TABLE, 
        new String[] { DBAdapter.COLUMN_Date }, 
        null, null, null, null, null, null); 
cursor = db.query(DBAdapter.SCAN_TABLE, 
        new String[] { DBAdapter.COLUMN_Date }, 
        null, null, 
        DBAdapter.COLUMN_Date,  // <-- groupBy 
        null, null);

要顯示的日期數據，你應該只傳遞日期該活動，並有閱讀所有匹配的日期的記錄：

SELECT * FROM ScanTable WHERE Date = ?

String selectedDate = ...; 
cursor = db.query(DBAdapter.SCAN_TABLE, null, 
        DBAdapter.COLUMN_Date + " = ?", selectedDate, 
        null, null, null);

來源

2013-01-12 07:47:18

將數據顯示到列表視圖中

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