一、概述
ListView点击item显示菜单是要实现这样的效果：
需要实现的逻辑如下：
1）点击一个普通item，展开当前菜单，同时关闭其他菜单
2）点击一个已展开的菜单，隐藏当前菜单
3）将展开菜单滑到listview之外，再滑动回来，展开菜单状态不变
4）点击菜单中的按钮，能够根据不同item进行不同的处理
二、实现思路
1、UI布局上，对于这种每个listitem都包含动态显示菜单的场景，可以直接在listitem的xml布局里就包含两部分元素：item本身以及展开菜单
点击item的时候，动态控制展开菜单这部分元素的Visibility就可以了
2、逻辑控制上，需要额外记录当前展开菜单的item是谁，这样可以方便高效的实现概述中描述的逻辑
三、开始干活
实现的代码结构不复杂，这里直接贴代码了：
listview_menu.xml：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:background="#EEEEEE" android:orientation="vertical" tools:context="${relativePackage}.${activityClass}" > <ListView android:id="@+id/listview_menu_list" android:layout_width="match_parent" android:layout_height="match_parent" android:divider="@null" /> </LinearLayout>
listview_menu_item.xml：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="wrap_content" android:background="@android:color/background_light" android:orientation="vertical" android:descendantFocusability="blocksDescendants" > <TextView android:id="@+id/listview_menu_item_txt" android:layout_width="match_parent" android:layout_height="50dp" android:textStyle="bold" android:textSize="20sp" android:textColor="@android:color/black" android:text="123" /> <LinearLayout android:id="@+id/listview_menu_item_menu" android:layout_width="match_parent" android:layout_height="50dp" android:visibility="visible" android:orientation="horizontal" > <Button android:id="@+id/listview_menu_item_menu_toast" android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:background="#8080FF" android:textColor="@android:color/black" android:textSize="15sp" android:text="提示" /> <Button android:id="@+id/listview_menu_item_menu_collapse" android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:background="#80FF80" android:textColor="@android:color/black" android:textSize="15sp" android:text="收起" /> </LinearLayout> </LinearLayout>
ListViewMenuActivity.java：
public class ListViewMenuActivity extends Activity { private int mExpandedMenuPos = -1; private ListViewAdapter mAdapter; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.listview_menu); ArrayList<Integer> data = new ArrayList<Integer>(); for (int index = 0; index != 40; ++index) { data.add(index); } ListView list = (ListView)findViewById(R.id.listview_menu_list); list.setAdapter(mAdapter = new ListViewAdapter(this, data)); list.setOnItemClickListener(new OnListItemClickListenser()); } private class ListViewAdapter extends BaseAdapter { private LayoutInflater mLayoutInflater; private ArrayList<Integer> mListData; private OnMenuClickListenser mOnMenuClickListenser = new OnMenuClickListenser(); private class ViewHolder { public ViewHolder (View viewRoot) { root = viewRoot; txt = (TextView)viewRoot.findViewById(R.id.listview_menu_item_txt); menu = viewRoot.findViewById(R.id.listview_menu_item_menu); btnToast = (Button)viewRoot.findViewById(R.id.listview_menu_item_menu_toast); btnCollapse = (Button)viewRoot.findViewById(R.id.listview_menu_item_menu_collapse); } public View root; public TextView txt; public View menu; public Button btnToast; public Button btnCollapse; } public ListViewAdapter(Context context, ArrayList<Integer> data) { mLayoutInflater = LayoutInflater.from(context); mListData = data; } @Override public int getCount() { return mListData == null ? 0 : mListData.size(); } @Override public Object getItem(int position) { return mListData == null ? 0 : mListData.get(position); } @Override public long getItemId(int position) { return position; } @Override public View getView(final int position, View convertView, ViewGroup parent) { if (convertView == null) { convertView = mLayoutInflater.inflate(R.layout.listview_menu_item, parent, false); convertView.setTag(new ViewHolder(convertView)); } if (convertView != null && convertView.getTag() instanceof ViewHolder) { final ViewHolder holder = (ViewHolder)convertView.getTag(); holder.txt.setText(String.valueOf(getItem(position))); if (position % 2 == 0) { holder.root.setBackgroundColor(0xFFC9EEFE); } else { holder.root.setBackgroundColor(0xFFFFFFFF); } holder.menu.setVisibility(position == mExpandedMenuPos ? View.VISIBLE : View.GONE); holder.btnToast.setText("提示" + position); holder.btnCollapse.setText("收起" + position); holder.btnToast.setOnClickListener(mOnMenuClickListenser); holder.btnCollapse.setOnClickListener(mOnMenuClickListenser); } return convertView; } private class OnMenuClickListenser implements View.OnClickListener { @Override public void onClick(View v) { final int id = v.getId(); if (id == R.id.listview_menu_item_menu_toast) { Toast.makeText(ListViewMenuActivity.this, "提示" + mExpandedMenuPos, Toast.LENGTH_SHORT).show(); } else if (id == R.id.listview_menu_item_menu_collapse) { mExpandedMenuPos = -1; notifyDataSetChanged(); } } } } private class OnListItemClickListenser implements OnItemClickListener { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { if (position == mExpandedMenuPos) { mExpandedMenuPos = -1; } else { mExpandedMenuPos = position; } mAdapter.notifyDataSetChanged(); } } }
四、demo视频
[转载请保留本文地址：http://www.cnblogs.com/snser/p/5539746.html
五、demo工程
保存下面的图片，扩展名改成 .zip 即可
以上所述是小编给大家介绍的ListView点击Item展开菜单实现代码详解的相关知识，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对脚本之家网站的支持！