SQLite 数据库不更新列表视图项并插入新项

当项目为listview单击后，它会在另一个活动中打开，该活动具有edittext。编辑项目后，当我保存它时，项目不会在列表视图中更新，但会在列表视图中插入一个新条目。

如何更新现有项目而不插入新项目？

这是我的代码

活动：TRList.class

ArrayList<HashMap<String, String>> items = new ArrayList<>();
List<TRListFormat> list = trDb.getAllReminders();

for (TRListFormat val : list) {
    HashMap<String, String> map = new HashMap<>();
    map.put("title",val.getTitle());
    map.put("description", val.getDes());
    map.put("date", val.getDate());
    map.put("time", val.getTime());

    items.add(map);
}

adapter = new SimpleAdapter(this, items, R.layout.tr_list_format,
            new String[] { "title", "description", "date", "time" },
            new int[] {R.id.tbr_title, R.id.tbr_des, R.id.tbr_date, R.id.tbr_time });

lv = (ListView)findViewById(R.id.tbr_list);
lv.setAdapter(adapter);
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> adapterView, View view, int position, long id) {
            Intent intent = new Intent(TRList.this, TRTimeReminder.class);
            intent.putExtra("remId", (int)id);
            startActivity(intent);
        }
});

When listView单击项目，它会打开另一个活动

TRTimeReminder.class我已经设定保存按钮 in menu

case R.id.menu_tbr_done:
            String title = edTitle.getText().toString();
            String des = edDes.getText().toString();
            String time = timeView.getText().toString();
            String date = dateView.getText().toString();

            Bundle extras = getIntent().getExtras();
            if(extras != null) {
                int value = extras.getInt("remId");
                if (value > 0) {
                    trDb.updateReminder(new TRListFormat(value, title, des, date, time));
                }
            }
            else{
                trDb.addReminder(new TRListFormat(title, des, date, time));
            }

            Intent i = new Intent(getApplicationContext(), TRList.class);
            startActivity(i);

            edTitle.getText().clear();
            edDes.getText().clear();
            dateView.setText(currDate);
            timeView.setText(currTime);

            return true;

TRDBHelper.class

//Add new reminder
void addReminder(TRListFormat format){

    SQLiteDatabase db = this.getWritableDatabase();

    ContentValues values = new ContentValues();
    values.put(COLUMN_TITLE, format.getTitle());
    values.put(COLUMN_DES, format.getDes());
    values.put(COLUMN_DATE, format.getDate());
    values.put(COLUMN_TIME, format.getTime());

    db.insert(TABLE_NAME, null, values);
    db.close();
}

//Update single reminder
public void updateReminder(TRListFormat format){

    SQLiteDatabase db = this.getWritableDatabase();

    int id = format.getId();

    ContentValues values = new ContentValues();
    values.put(COLUMN_ID, format.getId());
    values.put(COLUMN_TITLE, format.getTitle());
    values.put(COLUMN_DES, format.getDes());
    values.put(COLUMN_DATE, format.getDate());
    values.put(COLUMN_TIME, format.getTime());

    db.update(TABLE_NAME, values, COLUMN_ID+ " = " +id, null);
    db.close();
}

我认为你的适配器有问题。有 2 个可能的问题。

1. 适配器数据未更新。你说的是相反，新值被添加到 ListView 中。你真的确定吗？
2. 您还没有调用适配器的方法notifyDataSetChanged() http://developer.android.com/reference/android/widget/BaseAdapter.html#notifyDataSetChanged()更改值后。