3.SubMenu(子菜单)
所谓的子菜单只是在<**item**>中又嵌套了一层<**menu**>而已
代码示例:
实现代码:
编写子菜单的Menu文件:menu_sub.xml:
<?xml version="1.0" encoding="utf-8"?> <menu xmlns:android="http://schemas.android.com/apk/res/android"> <item android:id="@+id/submenu" android:title="子菜单使用演示~"> <menu> <group android:checkableBehavior = "none"> <item android:id="@+id/one" android:title = "子菜单一"/> <item android:id="@+id/two" android:title = "子菜单二"/> <item android:id="@+id/three" android:title = "子菜单三"/> </group> </menu> </item> </menu>
接着我们改下上面上下文菜单的两个方法的内容,换上下面的代码:
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) { //子菜单部分: MenuInflater inflator = new MenuInflater(this); inflator.inflate(R.menu.menu_sub, menu); super.onCreateContextMenu(menu, v, menuInfo); } public boolean onContextItemSelected(MenuItem item) { switch (item.getItemId()) { case R.id.one: Toast.makeText(MainActivity.this,"你点击了子菜单一",Toast.LENGTH_SHORT).show(); break; case R.id.two: item.setCheckable(true); Toast.makeText(MainActivity.this,"你点击了子菜单二",Toast.LENGTH_SHORT).show(); break; case R.id.three: Toast.makeText(MainActivity.this,"你点击了子菜单三",Toast.LENGTH_SHORT).show(); item.setCheckable(true); break; } return true; }
4.PopupMenu(弹出式菜单)
一个类似于PopupWindow的东东,他可以很方便的在指定View下显示一个弹出菜单,而且 他的菜单选项可以来自于Menu资源,下面我们写个简单的例子来使用下这个东东~
使用示例:
实现代码:
菜单资源文件:menu_pop.xml:
<?xml version="1.0" encoding="utf-8"?> <menu xmlns:android="http://schemas.android.com/apk/res/android"> <item android:id="@+id/lpig" android:title="小猪" /> <item android:id="@+id/bpig" android:title="大猪" /> </menu>
在布局中添加一个按钮,然后添加点击事件:
MainActivity.java:
btn_show_menu.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { PopupMenu popup = new PopupMenu(MainActivity.this,btn_show_menu); popup.getMenuInflater().inflate(R.menu.menu_pop, popup.getMenu()); popup.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() { @Override public boolean onMenuItemClick(MenuItem item) { switch (item.getItemId()){ case R.id.lpig: Toast.makeText(MainActivity.this,"你点了小猪~", Toast.LENGTH_SHORT).show(); break; case R.id.bpig: Toast.makeText(MainActivity.this,"你点了大猪~", Toast.LENGTH_SHORT).show(); break; } return true; } }); popup.show(); } });