Android中的Menu

Posted 2020-06-30

android中的设置按钮：长按或点击菜单键

1.长按选项：

布局文件：

 1 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 2     xmlns:tools="http://schemas.android.com/tools"
 3     android:layout_width="match_parent"
 4     android:layout_height="match_parent"
 5     android:orientation="vertical"
 6     android:paddingBottom="@dimen/activity_vertical_margin"
 7     android:paddingLeft="@dimen/activity_horizontal_margin"
 8     android:paddingRight="@dimen/activity_horizontal_margin"
 9     android:paddingTop="@dimen/activity_vertical_margin"
10     tools:context=".MenuActivity" >
11 
12     <TextView
13         android:id="@+id/menutext1"
14         android:layout_width="fill_parent"
15         android:layout_height="wrap_content"
16         android:text="第一种方法创建菜单"
17         android:textSize="20sp" />
18 
19     <TextView
20         android:id="@+id/menutext2"
21         android:layout_width="fill_parent"
22         android:layout_height="wrap_content"
23         android:text="第二种方法创建菜单"
24         android:textSize="20sp" />
25 
26     <ListView
27         android:id="@+id/menulist"
28         android:layout_width="fill_parent"
29         android:layout_height="fill_parent"
30         android:layout_marginTop="50dp" >
31     </ListView>
32 
33 </LinearLayout>

实现过程：

 1 private ListView list;
 2     private TextView lv;
 3 
 4     String[] str = { "TextView", "EditView", "Toast(消息框)" };
 5 
 6     @Override
 7     protected void onCreate(Bundle savedInstanceState) {
 8         super.onCreate(savedInstanceState);
 9         setContentView(R.layout.activity_menu);
10 
11         list = (ListView) findViewById(R.id.menulist);
12         ArrayAdapter<String> arr = new ArrayAdapter<String>(this,
13                 android.R.layout.simple_list_item_1, str);
14         list.setAdapter(arr);
15 
16         list.setOnCreateContextMenuListener(new OnCreateContextMenuListener() {
17 
18             @Override
19             public void onCreateContextMenu(ContextMenu menu, View v,
20                     ContextMenuInfo menuInfo) {
21                 menu.clear();
22                 menu.clearHeader();
23                 menu.setHeaderIcon((R.drawable.ic_launcher));
24                 menu.setHeaderTitle("我是ListView");
25                 menu.add(3, 6, 0, "删除");
26                 menu.add(3, 7, 1, "修改");
27             }
28         });
29         // 第一种方法
30         TextView tv = (TextView) findViewById(R.id.menutext1);
31         this.registerForContextMenu(tv);
32         // 第二种方法
33         lv = (TextView) findViewById(R.id.menutext2);
34         lv.setOnCreateContextMenuListener(new OnCreateContextMenuListener() {
35 
36             @Override
37             public void onCreateContextMenu(ContextMenu menu, View v,
38                     ContextMenuInfo menuInfo) {
39                 menu.setHeaderTitle("长度-ContextMenu");
40                 menu.add(0, 1, 0, "复制");
41                 SubMenu sb = menu.addSubMenu("查找");
42                 sb.add(1, 2, 0, "按id查找");
43                 sb.add(1, 3, 0, "按名称查找");
44             }
45         });
46     }

2.长按菜单项：

 1 private ListView list;
 2     private TextView lv;
 3 
 4     String[] str = { "TextView", "EditView", "Toast(消息框)" };
 5 
 6     @Override
 7     protected void onCreate(Bundle savedInstanceState) {
 8         super.onCreate(savedInstanceState);
 9         setContentView(R.layout.activity_menu);
10 
11         list = (ListView) findViewById(R.id.menulist);
12         ArrayAdapter<String> arr = new ArrayAdapter<String>(this,
13                 android.R.layout.simple_list_item_1, str);
14         list.setAdapter(arr);
15 
16         list.setOnCreateContextMenuListener(new OnCreateContextMenuListener() {
17 
18             @Override
19             public void onCreateContextMenu(ContextMenu menu, View v,
20                     ContextMenuInfo menuInfo) {
21                 menu.clear();
22                 menu.clearHeader();
23                 menu.setHeaderIcon((R.drawable.ic_launcher));
24                 menu.setHeaderTitle("我是ListView");
25                 menu.add(3, 6, 0, "删除");
26                 menu.add(3, 7, 1, "修改");
27             }
28         });
29         // 第一种方法
30         TextView tv = (TextView) findViewById(R.id.menutext1);
31         this.registerForContextMenu(tv);
32         // 第二种方法
33         lv = (TextView) findViewById(R.id.menutext2);
34         lv.setOnCreateContextMenuListener(new OnCreateContextMenuListener() {
35 
36             @Override
37             public void onCreateContextMenu(ContextMenu menu, View v,
38                     ContextMenuInfo menuInfo) {
39                 menu.setHeaderTitle("长度-ContextMenu");
40                 menu.add(0, 1, 0, "复制");
41                 SubMenu sb = menu.addSubMenu("查找");
42                 sb.add(1, 2, 0, "按id查找");
43                 sb.add(1, 3, 0, "按名称查找");
44             }
45         });
46     }

Over