ANDROID笔记：ContextMenu的用法

 1 package com.example.android_menu;
 2 
 3 import android.app.Activity;
 4 import android.graphics.Color;
 5 import android.os.Bundle;
 6 import android.view.ContextMenu;
 7 import android.view.ContextMenu.ContextMenuInfo;
 8 import android.view.MenuItem;
 9 import android.view.View;
10 import android.widget.TextView;
11 import android.widget.Toast;
12 
13 public class ContextMenuActivity extends Activity {
14     TextView textView;
15 
16     @Override
17     protected void onCreate(Bundle savedInstanceState) {
18         super.onCreate(savedInstanceState);
19         setContentView(R.layout.contextmenuactivity);
20         textView = (TextView) findViewById(R.id.itemtext);
21         registerForContextMenu(textView);
22 
23     }
24 
25     @Override
26     public void onCreateContextMenu(ContextMenu menu, View v,
27             ContextMenuInfo menuInfo) {
28         super.onCreateContextMenu(menu, v, menuInfo);
29 
30         menu.add(0, 1, 0, "红色");
31         menu.add(0, 2, 0, "紫色");
32         menu.add(0, 3, 0, "蓝色");
33         menu.setGroupCheckable(0, true, false);
34 
35     }
36 
37     @Override
38     public boolean onContextItemSelected(MenuItem item) {
39         item.setChecked(true);
40         switch (item.getItemId()) {
41         case 1:
42             Toast.makeText(getApplicationContext(), "1", Toast.LENGTH_SHORT)
43                     .show();
44             textView.setBackgroundColor(Color.RED);
45             break;
46 
47         case 2:
48             Toast.makeText(getApplicationContext(), "2", Toast.LENGTH_SHORT)
49                     .show();
50             textView.setBackgroundColor(Color.YELLOW);
51             break;
52         case 3:
53             Toast.makeText(getApplicationContext(), "3", Toast.LENGTH_SHORT)
54                     .show();
55             textView.setBackgroundColor(Color.BLUE);
56             break;
57         }
58         return super.onContextItemSelected(item);
59     }
60 }

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:layout_width="match_parent"
 4     android:layout_height="match_parent"
 5     android:orientation="vertical" >
 6 
 7     <TextView
 8         android:id="@+id/itemtext"
 9         android:layout_width="wrap_content"
10         android:layout_height="wrap_content"
11         android:text="0000"
12         android:textColor="#000000" />
13 
14 </LinearLayout>