刪除從表中的特定行與列表視圖

我有一個表「itemsDataTable」當我刪除一行：刪除從表中的特定行與列表視圖

public void deleteExpense(long idToDelete){ // Delete Expense 
    Log.d(TAG, "Expense deleted with id: " + idToDelete); 
    db.delete(TABLE, COLUMN_ID + " = " + idToDelete, null); 
}

它搞砸了。我從列表視圖中選擇一個項目，並在新的屏幕中選擇刪除該行。行的_id仍在表中，但該行中的所有細節均爲空。列表視圖的位置沒有用，因爲如果我刪除多次，位置不正確。

的結果是這樣的：

_id some_title 
1 blabla 
2 blabla 
3 
4 blabla 
5 
6 blabla

任何想法如何解決這一切混亂？

我的列表視圖：

ListView lvItemsHistory=(ListView)findViewById(R.id.listView1); 
     final ArrayList<Expense>expensesList=new ArrayList<Expense>(); 
     Cursor sortCurser=MainActivity.itemsDataBase.query(); 

     while (sortCurser.moveToNext()) { 
      expensesList.add(new Expense(
        sortCurser.getString(sortCurser.getColumnIndex(ItemsDataBase.COLUMN_DESCRIPTION)), 
        sortCurser.getInt(sortCurser.getColumnIndex(ItemsDataBase.COLUMN_PRICE)), 
        sortCurser.getString(sortCurser.getColumnIndex(ItemsDataBase.COLUMN_PAYMENT_OPTION)), 
        sortCurser.getString(sortCurser.getColumnIndex(ItemsDataBase.COLUMN_ITEM_CATEGORY)), 
        sortCurser.getString(sortCurser.getColumnIndex(ItemsDataBase.COLUMN_PHOTO_URL)), 
        sortCurser.getString(sortCurser.getColumnIndex(ItemsDataBase.COLUMN_LOCATION)), 
        sortCurser.getString(sortCurser.getColumnIndex(ItemsDataBase.COLUMN_DATE)), 
        sortCurser.getString(sortCurser.getColumnIndex(ItemsDataBase.COLUMN_TIME)), 
        sortCurser.getString(sortCurser.getColumnIndex(ItemsDataBase.COLUMN_VOICE_RECORD_URL)))); 
     } 

     ArrayAdapter<Expense>itemsAdapter=new ArrayAdapter<Expense>(this, android.R.layout.simple_list_item_1, expensesList); 
     lvItemsHistory.setAdapter(itemsAdapter); 
     lvItemsHistory.setOnItemClickListener(new AdapterView.OnItemClickListener() { 

      @Override 
      public void onItemClick(AdapterView<?> arg0, View arg1, int position, long arg3) { 
       Log.d(ItemsDataBase.TAG, "Position = " + (position + 1)); 
       Expense item=expensesList.get(position); 
       Intent intent=new Intent(HistoryExpense.this, ShowExpense.class); 
       intent.putExtra("itemName", item); 
       intent.putExtra("positionExpense", position + 1); 
       finish(); 
       startActivity(intent); 
      } 

     });

ShowExpense：

public class ShowExpense extends Activity { 

    protected int expenseID; 

    private boolean isPlay; 
    private MediaPlayer mediaPlayer; 
    Facebook facebook; 

    private TextView tvDescription, tvPrice, tvPaymentOption, tvCategory, tvLocation, tvDate, tvTime, tvIsAudioNote; 
    private ImageButton btnPlayRecordedNote, shareButton, btnShareToTwitter; 
    private Button btnDeleteItem, btnExportToPDF; 
    private ImageView ivItemPhoto; 


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

     isPlay = true; // Reset so we can play the audio 

     tvDescription = (TextView)findViewById(R.id.textView2); 
     tvPrice = (TextView)findViewById(R.id.textView4); 
     tvPaymentOption = (TextView)findViewById(R.id.textView6); 
     tvCategory=(TextView)findViewById(R.id.textView8); 
     tvLocation=(TextView)findViewById(R.id.textView10); 
     tvDate=(TextView)findViewById(R.id.textView12); 
     tvTime=(TextView)findViewById(R.id.textView14); 
     ivItemPhoto=(ImageView)findViewById(R.id.imageView1); 
     btnDeleteItem=(Button)findViewById(R.id.button1); 
     btnExportToPDF=(Button)findViewById(R.id.button3); 
     btnPlayRecordedNote=(ImageButton)findViewById(R.id.imageButton1); 
     tvIsAudioNote=(TextView)findViewById(R.id.textView15); 
     shareButton = (ImageButton)findViewById(R.id.imageButton2); 
     btnShareToTwitter = (ImageButton) findViewById(R.id.imageButtonTwitter); 

     Bundle bundle=getIntent().getExtras(); 
     final Expense item=(Expense)bundle.getSerializable("itemName"); 

     Bundle positionExpenseBundle = getIntent().getExtras(); 
     final int expensePosition = positionExpenseBundle.getInt("positionExpense"); 

     if (item.isAudioNote.equals("null") || item.isAudioNote.isEmpty()) { 
      tvIsAudioNote.setText("No recorded audio note."); 
     } 
     else { 
      tvIsAudioNote.setText("Recorded audio note saved to " + item.isAudioNote); 
     } 

     tvDescription.setText(item.strDescription); 
     tvPrice.setText(item.strPrice+""); 
     tvPaymentOption.setText(item.paymentOption); 
     tvCategory.setText(item.productCategory); 
     tvLocation.setText(item.isLocation); 
     tvDate.setText(item.isDate); 
     tvTime.setText(item.isTime); 

     final String PHOTO_URL=item.photoURL+""; 
     Log.i(ItemsDataBase.TAG, PHOTO_URL+""); 

     if (PHOTO_URL.isEmpty() || PHOTO_URL.equals("null") || PHOTO_URL.equals(null)) { 
      Log.d(ItemsDataBase.TAG, "There is no photo. Default photo will be presented."); 
      int defaultImageID=R.drawable.default_item_photo; 
      ivItemPhoto.setImageResource(defaultImageID); 
     } 
     else { 

      File file=new File(PHOTO_URL); 
      Log.i(ItemsDataBase.TAG, file.toString()); 
      if (file.exists()) { 
       Log.d(ItemsDataBase.TAG, "File photo url exists"); 
       Bitmap bmp=BitmapFactory.decodeFile(file.getAbsolutePath()); 
       Log.i(ItemsDataBase.TAG, "File absolute path="+file.getAbsolutePath()); 
       ivItemPhoto.setImageBitmap(bmp); 
      } 
      else { 
       Log.d(ItemsDataBase.TAG, "File photo url does not exists"); 
      } 
     } 

     btnDeleteItem.setOnClickListener(new View.OnClickListener() { // Delete Income 

      @Override 
      public void onClick(View v) { 

       MainActivity.itemsDataBase.deleteExpense(expensePosition); 
       runOnUiThread(new Runnable() { 

        public void run() { 

         AlertDialog.Builder builder=new AlertDialog.Builder(ShowExpense.this); //Notify user all is OK 
         AlertDialog completeOK=builder.setTitle("Information").setMessage("Expense deleted with id: " + (expensePosition)).setCancelable(false).setPositiveButton("OK", new DialogInterface.OnClickListener() { 

          @Override 
          public void onClick(DialogInterface dialog, int which) { 
           Log.d(ItemsDataBase.TAG, "Expense deleted with id: " + expensePosition); 

           finish(); 
          } 
         }).create(); 
         completeOK.show(); 
        } 
       }); 
      } 
     }); 

     btnExportToPDF.setOnClickListener(new View.OnClickListener() { // Export to pdf 

      @Override 
      public void onClick(View v) { 

       idanUtils idanUtils=new idanUtils(); 
       final String filename="/"+"EXPENSE_"+idanUtils.getDateAndTimeStamp()+".pdf"; 
       String deviceStorage=Environment.getExternalStorageDirectory().getAbsolutePath().toString(); 
       Log.d(ItemsDataBase.TAG, deviceStorage+filename); 

       File myDir = new File(deviceStorage + "/My Wallet"); 
       myDir.mkdirs(); 
       File file=new File(myDir, filename); 

       Document document=new Document(); 

       try { 
        PdfWriter.getInstance(document, new FileOutputStream(file)); 
        document.open(); 
        document.add(new Paragraph("Item description: "+item.strDescription)); 
        document.add(new Paragraph("Paid by: "+item.paymentOption)); 
        document.add(new Paragraph("Category: "+item.productCategory)); 
        document.add(new Paragraph("Price: "+item.strPrice)); 
        document.add(new Paragraph("Bught at: "+item.isLocation)); 
        document.add(new Paragraph("Dated: "+item.isDate)); 
        document.add(new Paragraph("Time: "+item.isTime)); 

        if (PHOTO_URL.isEmpty() || PHOTO_URL.equals("null")) { 
         document.add(new Paragraph("No image available")); 
         Log.i(ItemsDataBase.TAG, "No image available"); 
        } else { 
         Image image=Image.getInstance(item.photoURL); 
         image.scaleAbsolute(200f, 200f); 
         document.add(image); 
        } 

       } catch (Exception e) { 
        String error=(e.getMessage()==null)?"Error adding information to PDF document":e.getMessage(); 
        Log.e(ItemsDataBase.TAG, error); 
       } 
       document.close(); 

       runOnUiThread(new Runnable() { 

        public void run() { 

         AlertDialog.Builder builder=new AlertDialog.Builder(ShowExpense.this); //Notify user all is OK 
         AlertDialog completeOK=builder.setTitle("Information").setMessage(filename+" saved to /My Wallet folder on your internal storage.").setCancelable(false).setPositiveButton("OK", new DialogInterface.OnClickListener() { 

          @Override 
          public void onClick(DialogInterface dialog, int which) { 
           Log.d(ItemsDataBase.TAG, filename+" saved to /My Wallet folder on your internal storage."); 
          } 
         }).create(); 
         completeOK.show(); 
        } 
       }); 
      } 
     }); 

     btnPlayRecordedNote.setOnClickListener(new View.OnClickListener() { // Play recorded audio note 

      @Override 
      public void onClick(View v) { 

       if (isPlay) { // Play 
        mediaPlayer=new MediaPlayer(); 
        try { 
         mediaPlayer.setDataSource(item.isAudioNote); 
         mediaPlayer.prepare(); 
         mediaPlayer.start(); 
        } catch (IllegalArgumentException e) { 
         Log.e(ItemsDataBase.TAG, e.getMessage()); 
        } catch (IllegalStateException e) { 
         Log.e(ItemsDataBase.TAG, e.getMessage()); 
        } catch (IOException e) { 
         Log.e(ItemsDataBase.TAG, e.getMessage()); 
        } 
        isPlay = false; 
       } else{ // Stop 
        mediaPlayer.stop(); 
        mediaPlayer.release(); 
        isPlay = true; 
       } 

       //    MediaPlayer mediaPlayer=new MediaPlayer(); 
       //    try { 
       //     mediaPlayer.setDataSource(item.isAudioNote); 
       //     mediaPlayer.prepare(); 
       //     mediaPlayer.start(); 
       //    } catch (IllegalArgumentException e) { 
       //     Log.e(ItemsDataBase.TAG, e.getMessage()); 
       //    } catch (IllegalStateException e) { 
       //     Log.e(ItemsDataBase.TAG, e.getMessage()); 
       //    } catch (IOException e) { 
       //     Log.e(ItemsDataBase.TAG, e.getMessage()); 
       //    } 
       // TODO - On Key Press Back - STOP PLAY THE AUDIO NOTE 
       //    mediaPlayer.stop(); 
       //    mediaPlayer.release(); 
      } 
     }); 

     btnShareToTwitter.setOnClickListener(new View.OnClickListener() { // Share to Twitter 

      @Override 
      public void onClick(View v) { 

       String tweetUrl = "https://twitter.com/intent/tweet?text="; 
       String text = "Hi, just twitting from My Wallet app! I just spent " + item.strPrice + " to buy " + item.strDescription; 
       Uri uri = Uri.parse(tweetUrl + text); 
       startActivity(new Intent(Intent.ACTION_VIEW, uri)); 
      } 
     }); 

     shareButton.setOnClickListener(new View.OnClickListener() { // Share on Facebook 

      @Override 
      public void onClick(View v) { 
       FacebookConnect.message = "Hi! Just saying hello from My Wallet app! I just spent " + item.strPrice + "$ to buy " + item.strDescription + "!"; 
       FacebookConnect.postStatusUpdate(); 
       Intent fbIntent = new Intent(ShowExpense.this, FacebookConnect.class); 
       startActivity(fbIntent); 
       Log.d(ItemsDataBase.TAG, FacebookConnect.message); 
      } 
     }); 

    } 

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     // Inflate the menu; this adds items to the action bar if it is present. 
     getMenuInflater().inflate(R.menu.show_item_activity, menu); 
     return true; 
    } 

}

來源

2013-01-02 Idan Moshe

好的，一個問題是，您傳遞_position_不是_id_ ShowExpenses。所以當你調用'delete（expensePosition）'時，你正在使用錯誤的索引... – Sam

我現在注意到它，任何想法如何傳遞實際索引？ –

是的，使用'intent.putExtra（「positionExpense」，id）;'（如果它讓你感到困惑，你可能也想更改字符串名稱）。 – Sam

Delete row in database table given one column value - which is a string

來源

2013-01-02 18:55:01 mtaleb

我傳遞了我想要刪除的特定ID，但該函數刪除了整行並將ID保留在表上。 –

太棒了！現在它根據需要刪除整行。它解決了我的一半問題:) –

另一半是什麼？ – mtaleb

嘗試傳遞ID是這樣的：

db.delete(TABLE, COLUMN_ID + " =?", new String[] { idToDelete });

如果idToDelete是一個int /整數：

db.delete(TABLE, COLUMN_ID + " =?", new String[] { String.valueOf(idToDelete) });

來源

2013-01-02 19:00:23

有一個問題，我通過列表視圖的位置，而不是表中的實際_id。任何想法我該怎麼做？ –

您需要具有某種與數據庫中的列匹配的標識符。 –

刪除從表中的特定行與列表視圖

回答

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