我有一个表'itemsDataTable'，当我删除一行时：
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。我从列表视图中选择一个项目，然后在新屏幕中我可以选择删除该行。该行的 _id 仍在表中，但该行中的所有详细信息均为空。列表视图的位置没有用，因为如果我多次删除，位置不正确。
结果是这样的：
_id some_title
1 blabla
2 blabla
3
4 blabla
5
6 blabla
任何想法如何解决所有这些混乱？
我的列表视图：
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);
}
});
显示费用：
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;
}
}