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>