创建弹出菜单

1.ActionBar中的菜单：http://www.tuicool.com/articles/VrUBRf

2.ContextMenu(上下文菜单)

首先在res/menu/中创建一个XML文件，以定义菜单，我们将其命名为options

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools">

    <item
        android:id="@+id/add_item"
        android:title="Add Item"
        android:icon="@drawable/ic_launcher"
        android:showAsAction="ifRoom"
        tools:ignore="AppCompatResource"
        />
    <item
        android:id="@+id/remove_item"
        android:title="remove Item"
        android:icon="@drawable/ic_launcher"
        android:showAsAction="always"
        tools:ignore="AppCompatResource"
        />
    <item
        android:id="@+id/menu_edit"
        android:title="edit Item"
        android:icon="@drawable/ic_launcher"
        android:showAsAction="never"
        tools:ignore="AppCompatResource"
        />
</menu>

然后再Activity中用onCreatContextMenu()和onContextItemSelected()方法填充菜单，处理用户的选择

 1 @Override
 2     public boolean onContextItemSelected(MenuItem item) {
 3         switch(item.getItemId()){
 4             case R.id.add_item:
 5                 //执行添加动作
 6                 break;
 7             case R.id.remove_item:
 8                 //执行删除动作
 9                 break;
10             case R.id.menu_edit:
11                 break;
12             default:
13                 return super.onContextItemSelected(item);
14         }
15         return true;
16     }
17 
18 
19     @Override
20     public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
21         menu.setHeaderTitle("Choose an option");
22         getMenuInflater().inflate(R.menu.options,menu);
23         super.onCreateContextMenu(menu, v, menuInfo);
24 
25     }

默认是用户长按item时会触发菜单项，进而弹出选项框
使用时要使用registerForContextMenu(View view)来注册菜单，即将ContextMenu绑定到某个view中

示例：

 1 package com.example.qjm3662.service_learn;
 2 
 3 import android.content.ComponentName;
 4 import android.content.Intent;
 5 import android.content.ServiceConnection;
 6 import android.os.IBinder;
 7 import android.support.v7.app.AppCompatActivity;
 8 import android.os.Bundle;
 9 import android.view.ContextMenu;
10 import android.view.Menu;
11 import android.view.MenuItem;
12 import android.view.View;
13 import android.view.Window;
14 import android.widget.ArrayAdapter;
15 import android.widget.ListView;
16 import android.widget.TimePicker;
17 import android.widget.Toast;
18 
19 public class MainActivity extends AppCompatActivity {
20 
21     private static final String[] ITEMS = {"Lost","Time","Will","Never","Be","Find","again!"};
22     @Override
23     protected void onCreate(Bundle savedInstanceState) {
24         super.onCreate(savedInstanceState);
25         ListView list = new ListView(this);
26         ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,ITEMS);
27         list.setAdapter(adapter);
28         registerForContextMenu(list);
29         setContentView(list);
30     }
31 
32 
33 
34 
35     @Override
36     public boolean onContextItemSelected(MenuItem item) {
37         switch(item.getItemId()){
38             case R.id.add_item:
39                 //执行添加动作
40                 break;
41             case R.id.remove_item:
42                 //执行删除动作
43                 break;
44             case R.id.menu_edit:
45                 break;
46             default:
47                 return super.onContextItemSelected(item);
48         }
49         return true;
50     }
51 
52 
53     @Override
54     public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
55         menu.setHeaderTitle("Choose an option");
56         getMenuInflater().inflate(R.menu.options,menu);
57         super.onCreateContextMenu(menu, v, menuInfo);
58 
59     }
60 
61 
62    
63 }

3.ActionMode

　　激活ActionMode后会在系统的ActionBar上出现一个自定义的菜单，覆盖在原ActionBar上，并出现一个额外的可以退出ActionMode的选项。还允许同时选择多个条目来执行同一个动作。

 1 package com.example.qjm3662.service_learn;
 2 
 3 import android.support.v7.app.AppCompatActivity;
 4 import android.os.Bundle;
 5 import android.view.ActionMode;
 6 import android.view.Menu;
 7 import android.view.MenuItem;
 8 import android.view.View;
 9 import android.widget.AbsListView;
10 import android.widget.AdapterView;
11 import android.widget.ArrayAdapter;
12 import android.widget.ListView;
13 
14 public class MainActivity extends AppCompatActivity implements AbsListView.MultiChoiceModeListener{
15 
16     ListView list;
17     private static final String[] ITEMS = {"Lost","Time","Will","Never","Be","Find","again!"};
18     @Override
19     protected void onCreate(Bundle savedInstanceState) {
20         super.onCreate(savedInstanceState);
21         list = new ListView(this);
22         ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,ITEMS);
23         list.setAdapter(adapter);
24         list.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE_MODAL);
25         list.setMultiChoiceModeListener(this);
26         setContentView(list);
27     }
28 
29 
30     @Override
31     //当子控件的选择状态发生改变时调用该方法
32     public void onItemCheckedStateChanged(ActionMode mode, int position, long id, boolean checked) {
33         //获得list中被选中的item数目
34         int count = list.getCheckedItemCount();
35         mode.setTitle(String.format("%d Selected", count));
36     }
37 
38     @Override
39     public boolean onCreateActionMode(ActionMode mode, Menu menu) {
40         getMenuInflater().inflate(R.menu.options,menu);
41         return true;
42     }
43 
44     @Override
45     public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
46         //如果ActionMode一直是无效，可以在这里做些工作来更新菜单
47         return true;
48     }
49 
50     @Override
51     public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
52         //通过条目的Id得到用户的选择动作
53         switch (item.getItemId()){
54             case R.id.add_item:
55                 //执行添加动作
56                 break;
57             case R.id.remove_item:
58                 //执行删除动作
59                 break;
60             case R.id.menu_edit:
61                 break;
62             default:
63                 return false;
64         }
65         return true;
66     }
67 
68     @Override
69     public void onDestroyActionMode(ActionMode mode) {
70         //退出ActionMode时会调用该方法
71     }
72 }