android ContextMenu 上下文菜单示例

ch2_contextmenu.xml:

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 android:id="@+id/tv"
8        android:layout_width="fill_parent"
9        android:layout_height="wrap_content"
10        android:text="这是一个上下文菜单ContextMenu的示例"/>
11    
12    <EditText android:id="@+id/myEd"
13        android:layout_width="fill_parent"
14        android:layout_height="wrap_content"/>
15
16</LinearLayout>

ContextMenuActivity.java :

1package com.example.ch7;
2
3
4
5import com.example.baseexample.R;
6
7import android.app.Activity;
8import android.os.Bundle;
9import android.view.ContextMenu;
10import android.view.MenuItem;
11import android.view.View;
12import android.view.ContextMenu.ContextMenuInfo;
13import android.widget.EditText;
14import android.widget.TextView;
15
16public class ContextMenuActivity extends Activity {
17
18	private String tempStr;
19	private TextView tv;
20	private EditText myEd;
21	
22	public void onCreate(Bundle savedInstanceState){
23		super.onCreate(savedInstanceState);
24		setContentView(R.layout.ch7_contextmenu);
25		this.registerForContextMenu(findViewById(R.id.tv));
26		this.registerForContextMenu(findViewById(R.id.myEd));
27	}
28	
29	public void onCreateContextMenu(ContextMenu menu,View v,ContextMenuInfo menuInfo){
30		menu.setHeaderIcon(R.drawable.ic_launcher);
31		if(v==findViewById(R.id.tv)){
32			menu.add(0,1,0,"复制");
33			menu.add(0,2,0,"剪切");
34			menu.add(0,3,0,"删除");
35		}
36		if(v==findViewById(R.id.myEd)){
37			menu.add(0,4,0,"粘贴");
38			menu.add(0,5,0,"删除");
39		}
40	}
41	
42	public boolean onContextItemSelected(MenuItem item){
43		tv = (TextView)findViewById(R.id.tv);
44		myEd = (EditText)findViewById(R.id.myEd);
45		switch(item.getItemId()){
46		case 1:
47			tempStr = tv.getText().toString();
48			break;
49		case 2:
50			tempStr = tv.getText().toString();
51			tv.setText("");
52			break;
53		case 3:
54			tv.setText("");
55			break;
56		case 4:
57			myEd.setText(tempStr);
58			break;
59		case 5:
60			myEd.setText("");
61			break;
62		}
63		return true;
64	}
65	
66	
67}