Android中ListView动态添加删除项

ListView需要删除

参考资料

首先是创建三个全局变量：

SimpleAdapter listItemAdapter; // ListView的适配器

ArrayList<HashMap<String, Object>> listItem; // ListView的数据源，这里是一个HashMap的列表

ListView myList; // ListView控件

然后在Activity的onCreate函数中对变量进行初始化：

listItem = new ArrayList<HashMap<String, Object>>();

listItemAdapter = new SimpleAdapter(this, listItem, R.layout.mylayout,

new String[]{"image", "title", "text"},

new int[]{R.id.ItemImage, R.id.ItemTitle, R.id.ItemText});

myList = (ListView)findViewById(R.id.TaxiList);

myList.setAdapter(listItemAdapter);

添加两个私有的功能函数：

private void addItem()

{

HashMap<String, Object> map = new HashMap<String, Object>();

map.put("image", R.drawable.icon);

map.put("title", "标题");

map.put("text", "要显示的内容");

listItem.add(map);

listItemAdapter.notifyDataSetChanged();

}

private void deleteItem()

{

int size = listItem.size();

if( size > 0 )

{

listItem.remove(listItem.size() - 1);

listItemAdapter.notifyDataSetChanged();

}

}

另附上ListView的项自定义的Layout不再多说:

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout

android:id="@+id/RelativeLayout01"

android:layout_width="fill_parent"

xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_height="wrap_content"

android:paddingBottom="4dip"

android:paddingLeft="12dip"

android:paddingRight="12dip">

<ImageView

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:src="@drawable/taxi1"

android:id="@+id/ItemImage"

android:paddingTop="4dip">

</ImageView>

<TextView

android:layout_height="wrap_content"

android:layout_width="fill_parent"

android:text="DaZhong Taxi Corporation"

android:layout_toRightOf="@+id/ItemImage"

android:id="@+id/ItemTitle"

android:textSize="24dip"></TextView>

<TextView

android:layout_height="wrap_content"

android:layout_width="fill_parent"

android:text="Tel:021-67786874"

android:id="@+id/ItemText"

android:layout_below="@+id/ItemTitle"

android:layout_toRightOf="@+id/ItemImage">

</TextView>

</RelativeLayout>

android中listview的元素删除问题

2012-01-19 14:04

写了一个listview 每行有一个删除按钮，用于删除这一行。删除按钮的click事件是在adapter里实现的 @Override public void onClick(View v) { Button delButton = (Button)v; String title = (String)delButton.getTag(); preference.getAllViews().remove(title); mTitList.remove(title); baseAdapter.notifyDataSetChanged(); } 此时会重新调用getView方法 @Override public View getView(int position, View convertView, ViewGroup parent) { LinearLayout layout = null; TicTacToeNode node = null; if (position == 0) { node = new TicTacToeNode(); node.setTitle("首页"); } else { node = preference.getNodeByTitle(mTitList.get(position)); } // if (convertView == null) { LayoutInflater inflater = LayoutInflater.from(mContext); layout = (LinearLayout)inflater.inflate(R.layout.windows_manage_list_item, null); ImageView icon = (ImageView)layout.findViewById(R.id.item_icon); if (position == 0){ icon.setImageBitmap(BitmapFactory.decodeResource(mContext.getResources(), R.drawable.icon)); } else { Bitmap iconBitmap = ResourceUtil.getImageBySD(Preference.SDCARD_URL + node.getIcon()); icon.setImageBitmap(iconBitmap); //icon.setImageBitmap(Preference.GetInstence().getAllViews().get(node.getTitle()).getDrawingCache()); } TextView titleView = (TextView)layout.findViewById(R.id.item_name); titleView.setText(node.getTitle()); titleView.setTextSize(14); Button deleteButton = (Button)layout.findViewById(R.id.del_button); if (position == 0) { deleteButton.setVisibility(View.INVISIBLE); } else { deleteButton.setVisibility(View.VISIBLE); deleteButton.setOnClickListener(deleteButtonListener); deleteButton.setFocusable(false); deleteButton.setTag(node.getTitle()); } // } // else { // layout = (LinearLayout)convertView; // } return layout; } 因为这里的复用机制，所以判断convertView为空时才创建新的行view，此时实际效果是删除了第一行元素（只是视图错乱，数据没有问题），我想是应该removeView来删除这个view来防止上面的问题，但如何获得这个view呢 待验证方式：根据button的tag记下此行的index，从传递过来的listview删除掉此view