討論區列表 >> Android APP 開發 >> Listview滑動刪除 數組越界
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樓主 shun 
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private void ShowRecords(){ final ArrayList<Contact> contacts = new ArrayList<>(db.getAllContacts()); data=new dataAdapter(this, contacts); lv.setAdapter(data); lv.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { dataModel = contacts.get(position); Toast.makeText(getApplicationContext(),String.valueOf(dataModel.getID()), Toast.LENGTH_SHORT).show(); } }); //加入侧滑显示的菜单 //1.首先实例化SwipeMenuCreator对象 SwipeMenuCreator creater = new SwipeMenuCreator() { @Override public void create(SwipeMenu menu) { // create置顶item SwipeMenuItem item1 = new SwipeMenuItem(getApplicationContext()); // set item background item1.setBackground(new ColorDrawable(Color.rgb(0xC9, 0xC9, 0xCE))); // set item width item1.setWidth(dp2px(90)); // set item title item1.setTitle("置顶"); // set item title fontsize item1.setTitleSize(18); // set item title font color item1.setTitleColor(Color.WHITE); // add to menu menu.addMenuItem(item1); //同理create删除item SwipeMenuItem deleteItem = new SwipeMenuItem(getApplicationContext()); // set item background deleteItem.setBackground(new ColorDrawable(Color.rgb(0xF9, 0x3F, 0x25))); // set item width deleteItem.setWidth(dp2px(90)); // set a icon deleteItem.setIcon(R.mipmap.ic_delete); // add to menu menu.addMenuItem(deleteItem); } }; // set creator lv.setMenuCreator(creater); //2.菜单点击事件 lv.setOnMenuItemClickListener(new SwipeMenuListView.OnMenuItemClickListener() { @Override public boolean onMenuItemClick(int position, SwipeMenu menu, int index) { switch (index) { case 0: //置顶的逻辑 if (position == 0) { Toast.makeText(getApplicationContext(), "已经置顶", Toast.LENGTH_SHORT).show(); return false; } Contact str = contacts.get(position); for (int i = position; i > 0; i--) { Contact s = contacts.get(i - 1); contacts.remove(i); contacts.add(i, s); } contacts.remove(0); contacts.add(0, str); data.notifyDataSetChanged(); break; case 1: contacts.remove(position); db.deleteContact(contacts.get(position).getID()); data.notifyDataSetChanged(); break; } return false; } }); } |
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